Patent application number | Description | Published |
20120039179 | METHOD AND APPARATUS FOR SUPPORTING MULTIPLE CARRIERS - A method and apparatus supporting multiple carriers is provided. A user equipment receives a self-control format indicator (CFI) indicating a size of a control region of a first carrier by using the first carrier. The user equipment receives downlink control information (DCI) comprising a cross-CFI indicating a size of a control region of a second carrier over a first downlink control channel in the control region of the first carrier. The user equipment monitors a second downlink control channel in the control region of the second carrier. | 02-16-2012 |
20120039285 | METHOD AND APPARATUS FOR TRANSMITTING HARQ ACK/NACK SIGNAL IN MULTI-ANTENNA SYSTEM - A method and apparatus of transmitting an ACK/NACK signal for a hybrid automatic repeat request (HARQ) in a wireless communication system is provided. A first ACK/NACK resource index and a second ACK/NACK resource index based on resources used to transmit a downlink control channel is determined. An ACK/NACK signal for a downlink transport block is transmitted through a plurality of antennas using first ACK/NACK resources obtained from the first ACK/NACK resource index and second ACK/NACK resources obtained from the second ACK/NACK resource index. An HARQ ACK/NACK signal can be reliably transmitted through a plurality of antennas. | 02-16-2012 |
20120113944 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting uplink control information and a device therefor, and the method comprises the steps of: selecting, from a plurality of uplink control channel resources, one uplink control channel resource corresponding to a plurality of HARQ-ACKs; and transmitting bit values corresponding to said plurality of HARQ-ACKs by using the selected uplink control channel resource. | 05-10-2012 |
20120218960 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 08-30-2012 |
20120294273 | METHOD AND DEVICE FOR TRANSMITTING EXTENDED UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a base station receiving uplink control information from a terminal, according to one embodiment of the present invention, comprises the following steps: transmitting allocated information which is allocated to the terminal from a plurality of physical uplink control channel (PUCCH) transmission resources, each of the PUCCH transmission resource comprising a combination of an information resource and a reference signal (RS) resource, including a plurality of RS resources; and receiving confirmation response information, RS, and additional control information among the plurality of PUCCH transmission resources, which are transmitted from the terminal through a specific information resource or a specific RS resource, wherein the additional control information can be indicated based on the selection of the specific RS resource which transmits a RS among a plurality of RS resources. | 11-22-2012 |
20120307771 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 12-06-2012 |
20120320805 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information when TDD and a plurality of cells are configured, and comprises the following steps: receiving one or more of at least one PDCCH signal and at least one PDSCH signal; generating for each of the cells reception reply information on one or more of the at least one PDCCH signal and the at least one PDSCH signal; and transmitting the reception reply information for each of the plurality of cells which are connected. | 12-20-2012 |
20120320859 | METHOD AND DEVICE FOR TRANSMITTING SOUNDING REFERENCE SIGNAL AND EXTENDED UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, discloses a method and a device for transmitting a sounding reference signal and extended uplink control information in a wireless communication system. A method for a terminal transmitting the uplink control information through a physical uplink control channel in the wireless communication system, according to one embodiment of the present invention, comprises the following steps: creating a block by multiplying a modulation symbol, which shows the uplink control information, to a circular shift sequence, and creating a N | 12-20-2012 |
20130010682 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL - The present invention relates to A METHOD AND A DEVICE FOR RECEIVING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM. More specifically, the method of the present invention comprises the following steps: receiving first control information for downlink scheduling in the first slot of a resource block pair, wherein the first control information includes allocation information on at least one resource unit; receiving a data in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a first value; and attempting to detect second control information for uplink scheduling in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a second value. | 01-10-2013 |
20130021980 | METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS ACCESS SYSTEM - The present invention provides various methods for transmitting channel state information relative to one or more serving cells in a carrier-coupled environment, and devices for supporting the same. As one embodiment of the present invention, a method for reporting channel state information (CSI) in a wireless access system that supports carrier coupling comprises the steps of: allowing a terminal to receive information related to a CSI report mode for one or more serving cells from a base station; and allowing the terminal to report the channel state information (CSI) on the one or more serving cells to the base station by considering the CSI report mode. In this case, if first type CSI for a first serving cell and second type CSI for a second serving cell are transmitted on the same subframe, the terminal can report CSI for one serving cell only, to the base station, according to priorities of CSI report types related to the CSI report mode. | 01-24-2013 |
20130044653 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event that a plurality of cells is constructed, wherein the method comprises the following steps: receiving a PDCCH and/or a PDSCH; generating acknowledgement information on the PDCCH and/or PDSCH; and, if acknowledgement information transmission timing and channel state information transmission timing collide with each other, dropping the channel state information and transmitting only the acknowledgement information, or transmitting the acknowledgement information and the channel state information together in accordance with a predetermined condition. | 02-21-2013 |
20130088973 | METHOD FOR ALLOCATING CONTROL CHANNEL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for allowing a terminal to receive a PDCCH in a wireless communication system using multiple carriers and a device therefore, and the method comprises the steps of: receiving a plurality of search spaces through a control region on a subframe, wherein each search space includes a plurality of PDCCH candidate sets, and each search space corresponds to each carrier; and monitoring PDCCH candidates for the PDCCH, wherein the intervals between the respective search spaces within said control region are determined by considering the ratios between the number of scheduled carriers and the number of CCEs within the control region. | 04-11-2013 |
20130089063 | METHOD AND DEVICE FOR UPLINK RESOURCE ALLOCATION - The present invention relates to a wireless communication system. In more detail, the present invention relates to a method for transmitting an uplink in a wireless communication system and to a device therefore, wherein the method for transmitting an uplink in a wireless communication system comprises the steps of: receiving a control channel signal including resource allocation information; and transmitting an uplink signal according to control channel signal. | 04-11-2013 |
20130094410 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method and apparatus for transmitting uplink control information when a plurality of cells is configured. The method includes receiving at least one of PDCCH(s) and PDSCH(s), generating reception response information about at least one of the PDCCH(s) and the PDSCH(s), and transmitting the reception response information through a PUCCH on an SR subframe. | 04-18-2013 |
20130100866 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event of a plurality of cell, wherein the method comprises the following steps; receiving a PPCCH and/or a PDSCH; generating reception acknowledgement information for said PDCCH and/or PDSCH: and transmitting the reception acknowledgement information in an SR subframe via a PUCCH. | 04-25-2013 |
20130121302 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and device for transmitting uplink control information when a plurality of cells are configured in a wireless communication system, the method comprising the steps of: generating a UCI; and determining a PUCCH resource for transmitting the UCI. If the reception response information and channel state information are triggered in the same subframe, only a first UCI generated from the reception response information is transmitted through a first PUCCH. If the reception response information and scheduling request information are triggered in the same subframe, a second UCI generated by jointly coding the reception response information and the scheduling request information is transmitted through a second PUCCH. The resource used for a reference signal for demodulating the first or second PUCCH is allocated in consideration of the UCI transmitted on PUCCH. | 05-16-2013 |
20130128813 | METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS ACCESS SYSTEM - The present invention provides various methods for transmitting channel state information relative to one or more serving cells in a carrier-coupled environment, and devices for supporting the same. As one embodiment of the present invention, a method for reporting channel state information (CSI) in a wireless access system that supports carrier coupling comprises the steps of: allowing a terminal to receive information related to a CSI report mode for one or more serving cells from a base station; and allowing the terminal to report the channel state information (CSI) on the one or more serving cells to the base station by considering the CSI report mode. In this case, if first type CSI for a first serving cell and second type CSI for a second serving cell are transmitted on the same subframe, the terminal can report CSI for one serving cell only, to the base station, according to priorities of CSI report types related to the CSI report mode. | 05-23-2013 |
20130155868 | METHOD AND APPARATUS FOR MONITORING CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present disclosure provides a method for monitoring a control channel in a wireless access system, including setting the number of maximum blind decoding times for each user equipment (UE)-specific search space and a common search space to which the control channel is transmitted; monitoring a plurality of candidate control channels in each of the search spaces, based on the number of maximum blind decoding times, set in the respective search spaces; and receiving downlink control information through a control channel which has succeeded in the blinding decoding among the plurality of candidate control channels, wherein the common search space is allocated to at least one carrier group that includes at least one component carrier. | 06-20-2013 |
20130163405 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 06-27-2013 |
20130163487 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event of a plurality of cell, wherein the method comprises the following steps: receiving a PDCCH and/or a PDSCH; generating reception acknowledgement information for said PDCCH and/or PDSCH; and transmitting the reception acknowledgement information in an SR subframe via a PUCCH. | 06-27-2013 |
20130170463 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus therefor. The present invention relates to a method comprising the steps of: selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources; and transmitting a bit value corresponding to the plurality of HARQ-ACKs using the selected uplink control channel resource, and to an apparatus therefor. | 07-04-2013 |
20130182675 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus for the same. The present invention relates to a method and to a device for said method which comprises the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources, and transmitting a bit value corresponding to the plurality of HARQ-ACKs by using the selected uplink control channel resource. | 07-18-2013 |
20130195063 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting uplink control information in an environment comprising a plurality of cells and to a device therefore, and relates to a method which comprises: receiving one, either or both of one or more PDCCH signals and one or more PDSCH signals; and generating entire received response information with respect to the one, either or both of the one or more PDCCH signals and one or more PDSCH signals, wherein portions of the received response information constituting the entire received response information are generated separately for each cell and each subframe. | 08-01-2013 |
20130215807 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method and apparatus for transmitting uplink control information in an FDD wireless communication system, in which a plurality of cells are arranged, are provided. The method includes: receiving one or more PDCCH signals and one or more PDSCH signals corresponding to the PDCCH signals in downlink subframe N; generating ACK/NACK information on the basis of the result of the acknowledgement of receipt of at least the one or more PDSCH signals; and transmitting the ACK/NACK information through a PUCCH. If a predetermined condition is satisfied, at least one of the PDCCH signals includes information indicating a DAI value, and if the predetermined condition is not satisfied, at least one of the PDCCH signals includes information indicating a value of a PUCCH resource for the ACK/NACK information. The information indicating the DAI value and the information indicating the value of the PUCCH resource are provided in the same field. | 08-22-2013 |
20130229993 | METHOD AND DEVICE FOR UPLINK RESOURCE ALLOCATION - The present invention relates to a wireless communication system. In more detail, the present invention relates to a method for transmitting an uplink in a wireless communication system and to a device therefore, wherein the method for transmitting an uplink in a wireless communication system comprises the steps of: receiving a control channel signal including resource allocation information; and transmitting an uplink signal according to control channel signal. | 09-05-2013 |
20130272172 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information in the event that a plurality of cells is constructed, wherein the method comprises the following steps: receiving a PDCCH and/or a PDSCH; generating acknowledgement information on the PDCCH and/or PDSCH; and, if acknowledgement information transmission timing and channel state information transmission timing collide with each other, dropping the channel state information and transmitting only the acknowledgement information, or transmitting the acknowledgement information, or transmitting the acknowledgement information and the channel state information together in accordance with a predetermined condition. | 10-17-2013 |
20130286905 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting uplink control information when TDD and a plurality of cells are configured, and comprises the following steps: receiving one or more of at least one PDCCH signal and at least one PDSCH signal; generating for each of the cells reception reply information on one or more of the at least one PDCCH signal and the at least one PDSCH signal; and transmitting the reception reply information for each of the plurality of cells which are connected. | 10-31-2013 |
20130322304 | TRANSMISSION METHOD AND RECEPTION METHOD FOR DOWNLINK SIGNAL, USER EQUIPMENT, AND BASE STATION - The present invention provides a DL grant transmission/reception measure for a cross-CC scheduling, when cells operating in different TDD DL-UL configurations from each other are merged. In addition, the present invention provides a measure for transmitting/receiving uplink ACK/NACK information for DL data transmitted according the DL grant. | 12-05-2013 |
20130322307 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information and a device therefor, the method comprising the steps of: forming a plurality of serving cells each having different UL-DL configurations; receiving one or more signals requiring a HARQ-ACK response from M(M≧1) number of subframes; and executing the process for transmitting the HARQ-ACK response to the one or more signals in a specific subframe corresponding to the M number of subframes, wherein, only when the specific subframe is set as an uplink in all of the plurality of serving cells, the HARQ-ACK response to the one or more signals are transmitted through the specific subframe. | 12-05-2013 |
20130336262 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and an apparatus therefore, which includes the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from a plurality of uplink control channel resources, and transmitting bit values corresponding to the plurality of HARQ-ACKs using the selected uplink control channel resource. | 12-19-2013 |
20130343242 | METHOD FOR RECEIVING DOWNLINK CONTROL INFORMATION AND METHOD FOR TRANSMITTING SAME, USER EQUIPMENT AND BASE STATION - Abstract: The present invention relates to a wireless communication system. More particularly, the present invention, when cells each operating in different TDD DL-UL configurations are merged, provides a plan for setting a UL grant transmission/reception timing for a cross-CC scheduling. In addition, the present invention, according to the UL grant timing, provides a base station for transmitting UL grant to a user equipment, and a user equipment for receiving the UL grant from the base station. | 12-26-2013 |
20130343243 | METHOD FOR RECEIVING ACK(ACKNOWLEDGEMENT)/NACK (NEGATIVE ACK) INFORMATION AND METHOD FOR TRANSMITTING SAME, USER EQUIPMENT AND BASE STATION - The present invention relates to a wireless communication system. More particularly, the present invention, when cells each operating in different TDD DL-UL configurations are merged, provides a plan for setting a downlink ACK/NACK transmission/reception timing for a cross-CC scheduling. In addition, the present invention, according to the downlink ACK/NACK transmission/reception timing, provides a base station for transmitting a ACK/NACK channel to a user equipment, and a user equipment for receiving the ACK/NACK channel from the base station. | 12-26-2013 |
20140003303 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR | 01-02-2014 |
20140003392 | TRANSMISSION METHOD AND RECEPTION METHOD FOR UPLINK SIGNAL, USER EQUIPMENT, AND BASE STATION | 01-02-2014 |
20140022962 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting a carrier merge, and a device therefor, the method comprising the steps of: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception response information on the data through a UL subframe of the second cell, wherein the relationship between the DL subframe and the UL subframe is determined by a parameter value set in a specific TDD UL-DL configuration inside a TDD UL-DL configuration set, and the specific TDD UL-DL configuration is the TDD UL-DL configuration having the least number of DL subframes from one or more TDD UL-DL configurations, in which subframes set as a DL in the first cell or the second cell are all set as DLs. | 01-23-2014 |
20140022963 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving a PHICH signal in a subframe #(n−L) of the first cell, or receiving a PDCCH signal in a subframe #(n−K) of the first cell; and transmitting a PUSCH signal in a subframe #n of the second cell, corresponding to the PHICH signal or the PDCCH signal, wherein the relationship between the subframes #(n−L), #(n−K), and #n is determined in consideration of a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of UL subframes from TDD UL-DL configuration(s), in which subframes set as UL in the first or second cell are all set as ULs. | 01-23-2014 |
20140022967 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD includes: generating a first HARQ-ACK (hybrid automatic repeat request-acknowledgement) set for a first cell using a value M; generating a second HARQ-ACK set for a second cell using the value M; and transmitting a bit value corresponding to a third HARQ-ACK set including the first HARQ-ACK set and the second HARQ-ACK set in an uplink subframe n, wherein M=max(M1, M2), max(M1, M2) representing a value being equal to or larger than not smaller between M1 and M2, wherein M1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and M2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different UL-DL configurations. | 01-23-2014 |
20140036840 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 02-06-2014 |
20140056184 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A wireless communication system is disclosed. A method for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD includes: generating a first HARQ-ACK (hybrid automatic repeat request—acknowledgement) set for a first cell using a value M; generating a second HARQ-ACK set for a second cell using the value M; and transmitting a bit value corresponding to a third HARQ-ACK set including the first HARQ-ACK set and the second HARQ-ACK set in an uplink subframe n, wherein M=max(M1, M2), max(M1, M2) representing a value being equal to or larger than not smaller between M1 and M2, wherein M1 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the first cell, and M2 corresponds to the number of downlink subframes corresponding to the uplink subframe n in the second cell, wherein the first cell and the second cell have different UL-DL configurations. | 02-27-2014 |
20140056188 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for receiving a downlink control signal in a TDD-based wireless communication system, and to an apparatus therefor. The method comprises receiving a downlink signal via a downlink interval in a specific frame including the downlink interval, a guard interval and an uplink interval. A combination of the downlink interval, the guard interval and the uplink interval is given using configuration information on the specific subframe. When the configuration information is given such that the length of the downlink interval is larger than a specific value, detecting a first type of PDCCH is performed in the specific subframe. When the configuration information is given such that the length of the downlink interval is equal to or smaller than the specific value, detecting the first type of PDCCH is skipped in the specific subframe. | 02-27-2014 |
20140056268 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 02-27-2014 |
20140078944 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation and operates in a TDD system, and to an apparatus therefor. The system comprises the steps of: generating a first set of hybrid automatic repeat request acknowledgement (HARQ-ACK) associated with a first component carrier (CC); generating a second set of HARQ-ACK associated with a second CC; and transmitting 4-bit information corresponding to the first set of HARQ-ACK and the second set of HARQ-ACK on a physical uplink shared channel (PUSCH). | 03-20-2014 |
20140086119 | METHOD FOR USER EQUIPMENT TRANSRECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transceiving signals between a user equipment and a base station in a wireless communication system, and to an apparatus for same. More particularly, a method for the user equipment transceiving the signal in the wireless communication system, which is operated by a time division duplex (TDD), comprises the steps of: monitoring a physical downlink control channel (PDCCH) with respect to a special frame; and receiving a physical downlink shared channel (PDSCH) that corresponds to the PDCCH from the special subframe, when a PDCCH having downlink allocation information of the special subframe is detected, wherein the PDSCH is received by at least one orthogonal frequency division multiplexing (OFDM) symbol from a plurality of OFDM symbols that correspond to a defined guard period (GP) and an uplink pilot time slot (UpPTS) within the special subframe, according to a TDD uplink-downlink configuration. | 03-27-2014 |
20140086197 | DATA TRANSCEIVING METHOD AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus in which a terminal receives downlink data in a wireless communication system. The method comprises: a step of receiving a control channel signal including resource allocation information through a specific time domain of a subframe having a plurality of time domains; and a step of receiving the downlink data through the downlink data channel resource domain scheduled by the resource allocation information within said specific time domain. In cases where the downlink data channel resource domain is overlapped with a common search space, the downlink data is received through the residual resource domain except the portion overlapped with the common search space from among the downlink data channel resource domain. | 03-27-2014 |
20140092793 | METHOD FOR SETTING SUBFRAME IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for setting a subframe in a wireless communication system and to an apparatus for same. More particularly, the method for setting the subframe in the wireless communication system that is operated by a time division duplex (TDD), comprises the steps of: setting at least one uplink subframe and at least one downlink subframe according to an uplink-downlink (UL-DL) configuration; receiving resetting information with respect to a specific uplink subframe from the at least one uplink subframes; and setting the specific uplink subframe so as to include a first section for an uplink and a second section for a downlink. | 04-03-2014 |
20140092794 | METHOD FOR TRANSMITTING AND RECEIVING A SIGNAL, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. Specifically, a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation includes the steps of: setting a first cell of a first time division duplex (TDD) uplink (UL)-downlink (DL) configuration, and a second cell of a second TDD UL-DL configuration; receiving data over a DL subframe of the first cell; and transmitting a control signal over a UL subframe of the second cell in response to the received data, wherein a relationship of the DL subframe and UL subframe is determined by parameter values set in a specific TDD UL-DL configuration in a TDD WL-DL configuration set, the specific TDD UL-DL configuration has the minimum number of DL subframes from among one or more of TDD UL-DL configurations in which subframes set as a DL or X are all set as the DL in the first cell or the second cell, the subframes set as X have different subframe directions in the first cell and the second cell at a corresponding subframe timing, and the uses thereof are limited in either the first cell or the second cell. | 04-03-2014 |
20140092856 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink channel state information (CSI) in a wireless communication system that supports carrier aggregation, and to an apparatus for the method. The method for reporting CSI in a wireless communication system that supports carrier aggregation comprises the steps of: configuring a plurality of downlink component carriers (DL CCs); setting a CSI report mode on the plurality of DL CCs for each DL CC; and performing an operation for transmitting CSI according to the CSI report mode set on each DL CC. If a P-number of CSI overlap in the same subframe and a first condition is satisfied, a Q-number of CSI among the P-number of CSI are transmitted through a first physical channel, and if the P-number of SCI overlap in the same subframe and a second condition is satisfied, only an R-number of CSI among the P-number of CSI are transmitted through a second physical channel which is different from the first physical channel, wherein R is smaller than Q. | 04-03-2014 |
20140105076 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. In more detail, the present invention relates to a method and device for transmitting uplink control information in a wireless communication system that supports carrier merging and operates in TDD, and the method comprises the following steps: receiving at least one or more than one PDCCH and more than one PDSCH from a plurality of downlink sub frames according to a UL-DL configuration: determining a bit number of reception response information on the at least one of more than one PDCCH and more than one PDSCH by using a value indicated by a predetermined 2-bit field in a DCI format for UL scheduling; and transmitting the reception response information through PUSCH corresponding to the DIC format. | 04-17-2014 |
20140105154 | METHOD FOR ALLOCATING A CONTROL CHANNEL AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal performs a process for determining a control channel allocation for a control channel, and to an apparatus for the method. The method comprises the steps of: monitoring, on a specific carrier, a common search space including a control channel candidate set for the control channel; and monitoring, on the specific carrier, a terminal-specific search space including the control channel candidate set for the control channel. In cases where the terminal is set to monitor a plurality of control channel candidates having the same radio network temporary identifier (RNTI), same information size, same first control channel resource, and same control channel resource aggregation level in the common search space and the terminal-specific search space, the control channel candidate that satisfies the above conditions is received only in the common search space. | 04-17-2014 |
20140105157 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, in a method for receiving a downlink signal in a wireless communication system and an apparatus for same, the present invention relates to a method and an apparatus for same, comprising the steps of: receiving a subframe including a plurality of OFDM symbols; monitoring a plurality of search spaces which are configured on the subframe, so as to receive a PDCCH which is indicated to a terminal; and performing an operation in accordance with a PDCCH which is detected when the PDCCH that is indicated to the terminal is detected, wherein each of the search spaces is configured on a first resource region and/or a second resource region, in accordance with a predetermined condition, and the first resource region and the second resource region are separated with a specific OFDM symbol as a boundary on a time domain. | 04-17-2014 |
20140105191 | METHOD OF TRANSMITTING CONTROL INFORMATION AND DEVICE FOR SAME - The present invention relates to a wireless communication system. In more detail, a method for performing HARQ (hybrid automatic repeat request) retransmission by a communication device in a wireless communication system, the method comprising: initially transmitting a data block to a Base Station (BS); attempting PDCCH (physical downlink control channel detection) in a predetermined time interval including a plurality of subframes after transmission of an uplink channel signal; and retransmitting the data block when a PDCCH signal indicating retransmission of the data block is detected in the predetermined time interval, wherein reception of a PHICH (physical hybrid ARQ indicator channel) corresponding to initial transmission of the data block is skipped. | 04-17-2014 |
20140112277 | METHOD FOR CONFIGURING RESOURCE FOR CARRIER AGGREGATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention related to a method for performing communication on a specific single secondary cell (SCell) in a wireless communication system supporting carrier aggregation and to an apparatus for same, wherein the method comprises the following steps: receiving setting information on a plurality of frequency zones comprising the specific single SCell, wherein the plurality of frequency zones include at least one available frequency zone and at least zone unavailable frequency zone; and performing the communication from the specific single SCell, wherein a signal for the communication is transmitted and received only within the at least one available frequency from the specific single SCell. | 04-24-2014 |
20140119313 | METHOD FOR TRANSMITTING AND RECEIVING UPLINK SIGNAL, USER EQUIPMENT, AND BASE STATION - The present invention categorizes a plurality of cells that are configured to a user equipment into at least one cell group, and configures an anchor cell for each of the cell groups. The anchor cell for each of the cell groups is used for transmitting a PUCCH, which carries uplink control information on a pertinent cell group, and in a random access process for acquiring a timing advance with respect to the pertinent cell group. When the uplink control information is transmitted from a PUSCH of one cell, the PUSCH carries only the uplink control information on the cell group to which the one cell belongs and does not carry information on another cell group. | 05-01-2014 |
20140119339 | METHOD FOR CONTROLLING ERROR FOR CARRIER AGGREGATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for carrying out a hybrid automatic repeat request (HARQ) process when a plurality of cells are configured, comprising the following steps: receiving scheduling information for transmitting data from a first cell; operating a first HARQ process from the first cell based on the scheduling information; and relaying an operation of the first HARQ process to a second HARQ process of a second cell which is different from the first cell, when a predetermined condition is satisfied. | 05-01-2014 |
20140126433 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: receiving periodic information for reporting CSI; generating A/N information with respect to at least one cell from a plurality of cells to transmit from an uplink subframe n; and performing an action for transmitting the CSI information from the uplink subframe n according to the periodic information, wherein the CSI information and the A/N information are transmitted from the uplink subframe n through the same physical channel when a specific condition is satisfied, and only the A/N information is transmitted from the uplink subframe n when the specific condition is not satisfied, wherein the specific condition is Mp=0, and the A/N information comprising only A/N with respect to a first piece of specific downlink data that is received through a specific SCell, wherein the Mp expresses the number of downlink subframes that corresponds to the uplink subframe n with respect to a PCell. | 05-08-2014 |
20140133430 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING UPLINK SIGNAL, AND METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING DOWNLINK SIGNAL - The present invention provides a method for scheduling an uplink and a method for scheduling a downlink for a user equipment group comprising a plurality of user equipments in similar channel situations. In the present invention, which relates to the method for scheduling the uplink, a primary user equipment for a user equipment group is configured, and information according to a random access procedure that is performed by the primary user equipment is shared by means of other user equipments in the user equipment group. In the present invention, which relates to the method for scheduling the downlink, each of the user equipment in the user equipment group attempt to detect downlink data by a random access preamble transmission timing, and transmits a pertinent random access preamble to a base station at the random access preamble transmission timing, thereby notifying the base station of a failure to receive the downlink data, when the detection of the downlink data by the random access preamble transmission timing fails. | 05-15-2014 |
20140161084 | DOWNLINK SIGNAL RECEIVING METHOD AND USER EQUIPMENT, AND DOWNLINK SIGNAL TRANSMITTING METHOD AND BASE STATION - According to the present invention, one or more PDCCH-SFs are set from among subframes in a predetermined duration so as to force user equipment (UE) to perform a PDCCH blind decoding (BD). Information indicating said set PDCCH-SF is provided to the UE from a base station (BS). The UE performs the PDCCH BD only in the PDCCH-SF which is set to the UE itself, and not to all subframes, and performs HARQ process(es) according to the PDCCH BD. The present invention exhibits the advantages of reducing the number of BDs which the UE has to perform and of reducing the implementation complexity of the UE. | 06-12-2014 |
20140169242 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information in a wireless communication system that supports carrier aggregation and operates in a time division duplex (TDD) scheme, the method comprising a step of transmitting a hybrid automatic repeat request-acknowledgement (HARQ-ACK) for each component carrier (CC) according to a specific parameter; wherein if the specific parameter is smaller than a specific value, the HARQ-ACK for each CC is individually transmitted, and if the specific parameter is equal to or larger than the specific value, the HARQ-ACK for each CC is transmitted using the specific number of bit values corresponding to said HARQ-ACK. The present invention also relates to an apparatus for the method. | 06-19-2014 |
20140169297 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING MCS INDEX FOR 256QAM IN WIRELESS ACCESS SYSTEM - A method and apparatus for transmitting and receiving an MCS index for 256 QAM in a wireless access system are disclosed, which relate to methods for transmitting and receiving a Modulation and Coding Scheme (MCS) index supporting a 256 Quadrature Amplitude Modulation (QAM) scheme and apparatuses for supporting the same. The method for receiving a Modulation and Coding Scheme (MCS) index for 256 QAM (Quadrature Amplitude Modulation) in a wireless access system includes: receiving, by a user equipment (UE), a message including a 256 QAM indicator indicating use of a 256 QAM scheme; and receiving a physical downlink control channel (PDCCH) signal including the MCS index, wherein the UE obtains a modulation order and a Transport Block Size (TBS) index depending upon the MCS index for the 256 QAM scheme | 06-19-2014 |
20140169300 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CHANNEL STATUS INFORMATION (CSI) FOR SUPPORTING 256QAM IN WIRELESS ACCESS SYSTEM - A method and apparatus for transmitting and receiving channel status information (CSI) for supporting 256QAM in a wireless access system are disclosed. A method for transmitting a Channel Quality Indication (CQI) index for 256QAM (Quadrature Amplitude Modulation) in a wireless access system includes: receiving, by a user equipment (UE), a message including a 256QAM indicator indicating use of a 256QAM scheme; performing channel measurement of a downlink channel through which downlink data is transmitted; and transmitting a CQI index in response to the channel measurement result to a base station (BS), wherein the UE simultaneously manages a first CQI feedback table for supporting a legacy modulation scheme and a second CQI feedback table for supporting the 256QAM scheme. | 06-19-2014 |
20140169319 | METHOD FOR TRANSMITTING UPLINK SIGNAL, USER EQUIPMENT, METHOD FOR RECEIVING UPLINK SIGNAL, AND BASE STATION - The present invention provides a method for a user equipment, which is included in a user equipment group that comprises a plurality of user equipments, transmitting to a base station an Acknowledgement/Negative ACK (ACK/NACK) signal with respect to downlink data that is received from the base station. The base station, according to the present invention, quasi-statically sets physical uplink control channel (PUCCH) resource identification information, which would be used by each of the plurality of user equipments, and dynamically allocates to the user equipment group a collection of PUCCH resources usable for transmitting ACK/NACK of the user equipment group. The user equipment, according to the present invention, transmits the ACK/NACK signal to the base station by using the PUCCH resource that is allocated to the user equipment from the collection of the PUCCH resources, which are dynamically allocated to the user equipment group, based on the PUCCH resource identification information that is quasi-statically allocated to the user equipment. | 06-19-2014 |
20140177488 | METHOD FOR USER EQUIPMENT TRANSRECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for receiving a signal between a user equipment and a base station in a wireless communication system, and to an apparatus for same. More particularly, a method for the user equipment receiving the signal in the wireless communication system, which is operated by a time division duplex (TDD), comprises the steps of: confirming a subframe which is reconfigured as a downlink, from a plurality of subframes that are configured according to a TDD uplink-downlink configuration; and receiving the signal from the subframe, which is reconfigured, wherein an index of the last orthogonal frequency division multiplexing (OFDM) symbol, from which the signal can be received, is decided in the subframe that is reconfigured. | 06-26-2014 |
20140192688 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: deciding HARQ-ACK bit numbers for each cell from a plurality of cells; composing a HARQ-ACK payload comprising HARQ-ACK bit(s) for each of the plurality of cells; and transmitting the HARQ-ACK payload from a subframe n through a PUSCH. | 07-10-2014 |
20140198756 | METHOD AND APPARATUS FOR ALLOCATION OF DISCONTINUOUS UPLINK RESOURCE - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a wireless communication system, wherein the method for transmitting an uplink signal in a wireless communication system comprises: a step of receiving a control channel signal containing resource allocation information; and a step of transmitting an uplink signal in accordance with the control channel signal, wherein the resource allocation information has a combination index r to be used for indicating two sets of resource blocks, and each set of resource blocks includes one or more continuous resource blocks. | 07-17-2014 |
20140204813 | METHOD AND APPARATUS FOR TRANSCEIVING SIGNALS - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and to an apparatus for the method, wherein the method is configured such that a base station, in which cross-carrier scheduling through a first component carrier (CC) is set, transmits a downlink signal in a TDD wireless communication system in which the first CC and a second CC are aggregated, wherein the method comprises a step of transmitting a control channel signal during a specific subframe timing during which the second CC is set as a downlink. The transmitting step involves transmitting the control channel signal through a control channel region of the first CC when the first CC is set as a downlink in the specific subframe timing, and transmitting the control channel signal through a control channel region of the second CC when the first CC is set as an uplink during the specific subframe timing. | 07-24-2014 |
20140204879 | METHOD AND DEVICE FOR UPLINK RESOURCE ALLOCATION - A method for transmitting an uplink signal by a device in a wireless communication system, the method including receiving a control channel signal including a resource allocation (RA) field; and transmitting an uplink signal according to the control channel signal. A size of the RA field is represented by the following expression MAX (RASizeA, RASizeB). RASizeA is a first number of bits for indicating a resource indication value (RIV) corresponding to a starting resource block (RB) and a length of contiguously allocated RBs. RASizeB is a second number of bits for indicating a combinatorial index r corresponding to 4 indexes, and the 4 indexes are used to indicate a start resource block group (RBG) index and an end RBG index of a first RB set and a start RBG index and an end RBG index of a second RB set. | 07-24-2014 |
20140241222 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal performs communication in a TDD-based wireless communication system having a plurality of CCs aggregated therein, the method comprising: a step of performing an uplink transmission or a downlink reception in each subframe on a first CC according to a first UL-DL configuration; and a step of performing an uplink transmission or a downlink reception in each subframe on a second CC according to a second UL-DL configuration. If the configuration of the subframe of the first CC is [U, D] and the configuration of the subframe of the second CC is [U, U] in subframes #k and #k+1, the subframe #k+1 of the second CC is set to X. The present invention also relates to an apparatus for the method. | 08-28-2014 |
20140241286 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink signal at a User Equipment (UE) in a wireless communication system includes receiving, from a Base Station (BS), an uplink scheduling grant for multi-antenna transmission; transmitting the uplink signal precoded using precoding information included in the received uplink scheduling grant to the BS; and retransmitting the uplink signal to the BS according to Acknowledgment/Negative Acknowledgment (ACK/NACK) corresponding to the transmitted uplink signal. The retransmitted uplink signal is precoded using precoding information included in a most recent uplink scheduling grant or a predetermined precoding matrix if an uplink scheduling grant for the retransmission is not received from the BS. | 08-28-2014 |
20140313950 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - A method and device for transmitting uplink control information in a wireless communication system supporting carrier aggregation and operating in TDD are discussed. The method includes transmitting hybrid automatic repeat request acknowledgements (HARQ-ACKs) feedback bits o(0),o(1),o(2),o(3) on a physical uplink shared channel (PUSCH), wherein the HARQ-ACKs feedback bits corresponds to HARQ-ACK(0), HARQ-ACK(1), HARQ-ACK(2), and HARQ-ACK(3) associated with a first component carrier (CC) and HARQ-ACK(0), HARQ-ACK(1), HARQ-ACK(2), and HARQ-ACK(3) associated with a second CC. | 10-23-2014 |
20140328292 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, particularly, a method in which a terminal transmits control information in a CA-based wireless communication system and an apparatus for the method, the method comprising: configuring a first cell and a second cell having different subframe configurations, wherein the second cell has any one of UL-DL configuration #0 to #6; receiving a DC) format including a DAI field, for the second cell; and transmitting HARQ-ACK information relating to the downlink DCI format. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the DAI field is used in a process of transmitting the HARQ-ACK information. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is #0, the DAI field is not used in a process of transmitting the HARQ-ACK information. | 11-06-2014 |
20140328312 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced control channel-based operation. A method for a base station for transmitting a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: determining one antenna port to be used for the downlink control channel; mapping the downlink control channel to a resource element on the basis of a reference signal for the one antenna port; and transmitting the mapped downlink control channel to a terminal, wherein an index for the one antenna port can be determined on the basis of a control channel element (CCE) index of the downlink control channel derived from the terminal identifier. | 11-06-2014 |
20140328332 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and apparatus for transmitting control information by means of a terminal in a CA-based wireless communication system, including the steps of: forming first and second cells that include different subframe configurations, wherein the second cell includes TDD UL-DL configuration #0; receiving a UL grant by means of the first cell; and transmitting data corresponding to the UL grant by means of the second cell. | 11-06-2014 |
20140334357 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device therefor, the method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception response information on the data through a UL subframe of the second cell, wherein the relationship between the DL subframe and the UL subframe is determined by a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of DL subframes from TDD UL-DL configuration(s), in which subframes set as a DL in the first or second cell are all set as DLs. | 11-13-2014 |
20140334358 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device therefor, the method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception response information on the data through a UL subframe of the second cell, wherein the relationship between the DL subframe and the UL subframe is determined by a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of DL subframes from TDD UL-DL configuration(s), in which subframes set as a DL in the first or second cell are all set as DLs. | 11-13-2014 |
20140341094 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information and a device therefor, the method comprising the steps of: forming a plurality of serving cells each having different UL-DL configurations; receiving one or more signals requiring a HARQ-ACK response from M(M≧1) number of subframes; and executing the process for transmitting the HARQ-ACK response to the one or more signals in a specific subframe corresponding to the M number of subframes, wherein, only when the specific subframe is set as an uplink in all of the plurality of serving cells, the HARQ-ACK response to the one or more signals are transmitted through the specific subframe. | 11-20-2014 |
20140341095 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting uplink control information and a device therefor, the method comprising the steps of: forming a plurality of serving cells each having different UL-DL configurations; receiving one or more signals requiring a HARQ-ACK response from M(M≧1) number of subframes; and executing the process for transmitting the HARQ-ACK response to the one or more signals in a specific subframe corresponding to the M number of subframes, wherein, only when the specific subframe is set as an uplink in all of the plurality of serving cells, the HARQ-ACK response to the one or more signals are transmitted through the specific subframe. | 11-20-2014 |
20140341149 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced-control channel-based operation. A method for a terminal for transmitting confirmation response information in a wireless communication system according to one embodiment of the present invention comprises a step for transmitting confirmation response information for a downlink data channel by means of an uplink control channel resource, wherein an index for the uplink control channel resource can be determined on the basis of a delegate antenna port of a downlink control channel derived from the identifier of the terminal. | 11-20-2014 |
20140355539 | METHOD AND APPARATUS FOR PERFORMING RANDOM ACCESS PROCESS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In detail, the present invention is a method in which user equipment for which a plurality of cells is constituted receives control information in a carrier aggregation-based wireless communication system, and an apparatus for the method. The method comprises: a step of receiving, through a first cell, uplink resource allocation information for a second cell; a step of transmitting an uplink signal on the second cell using the uplink resource allocation information; and a step of receiving response information to the uplink signal. The response information is received via a specific cell rather than the first cell when the uplink signal is transmitted by a random access process, and the response information is received via the first cell when the uplink signal is transmitted by a non-random access process. | 12-04-2014 |
20140362747 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and apparatus for transmitting control information by means of a terminal in a CA-based wireless communication system, including the steps of: forming first and second cells that include different subframe configurations, wherein the second cell includes TDD UL-DL configuration #0; receiving a UL grant by means of the first cell; and transmitting data corresponding to the UL grant by means of the second cell. | 12-11-2014 |
20140376421 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for transmitting uplink control information in the wireless communication system, which supports carrier aggregation and operates by a TDD, and comprises the steps of: generating a first HARQ-ACK set with respect to a first cell by using an L1 value; generating a second HARQ-ACK set with respect to a second cell by using an L2 value; and transmitting bit values, which correspond to the first and second HARQ-ACK sets are transmitted through a PUSCH from a subframe n, wherein L1=min (M1, W) and L2=min (M2, W) when the value (W) of a UL DAI corresponding to the PUSCH is 1 or 2, and L1=L2=W when the value (W) of the UL DAI corresponding to the PUSCH is 3 or 4, wherein min (A, B) represents a smaller number from A and B, M1 corresponds to the number of downlink subframes that correspond to an uplink subframe n with respect to the first cell, M2 corresponds to a the number of downlink subframes that correspond to the uplink subframe n with respect to the second cell, wherein the first cell and the second cell have different UL-DL configurations. | 12-25-2014 |
20140376486 | METHOD FOR EXECUTING RANDOM ACCESS PROCEDURE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a terminal to execute a random access procedure in a wireless communication system. Specifically, the method comprises the steps of: transmitting a random access preamble message to one or more nodes; receiving a random access response message from a serving cell from among the one or more nodes; and transmitting an uplink signal to a different node from among the one or more nodes, wherein the random access response message comprises information for transmitting the uplink signal to the different node. | 12-25-2014 |
20150016239 | METHOD AND APPARATUS FOR SETTING REFERENCE SIGNAL - Disclosed are a method and an apparatus for setting a reference signal. A wireless apparatus receives a primary synchronization signal (PSS) transmitted by a first orthogonal frequency division multiplexing (OFDM) symbol and a secondary synchronization signal (SSS) from a second OFDM symbol, and can search information for setting a reference signal on the basis of symbol numbers of the first OFDM symbol and the second OFDM symbol. Inter-cell interference can be reduced by means of a variety of methods for setting a reference signal. | 01-15-2015 |
20150016310 | METHOD AND DEVICE FOR TRANSMITTING DATA FOR HALF-DUPLEX DEVICE - A method for transmitting data for a half-duplex device in a wireless communication system is provided. The half-duplex device receives first downlink control information from a base station in a first subframe. The half-duplex device transmits uplink data to the base station in a second subframe. The first downlink control information includes a resource through which the uplink data is transmitted and information on the second subframe. | 01-15-2015 |
20150016315 | METHOD FOR TRANSRECEIVING SIGNALS AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting an uplink signal in a wireless communication system supporting carrier aggregation (CA), and to an apparatus for same, comprising the steps of: establishing a first cell having a first time division duplex (TDD) uplink-downlink (UL-DL) configuration and a second cell having a second TDD UL-DL configuration; receiving data through a DL subframe of the first cell; and transmitting reception reply information with respect to the data through a UL subframe of the second cell. | 01-15-2015 |
20150016339 | USER EQUIPMENT AND METHOD FOR RECEIVING SYNCHRONIZATION SIGNALS, AND BASE STATION AND METHOD FOR TRANSMITTING SYNCHRONIZATION SIGNALS - The present invention relates to a new type of carrier wave having a different configuration from existing carrier waves. The new type of carrier wave is detected by using at least one of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). When the new type of carrier wave is formed for detection by using only one of the PSS or the SSS, or by using both of the PSS and SSS, the new type of carrier wave includes PSS and SSS transmissions which are different from existing PSS and SSS transmissions. | 01-15-2015 |
20150016373 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION - A method for transmitting uplink control information and a wireless device are provided. The wireless device masks the cyclic redundancy check (CRC) of a first piece of uplink control information with a masking sequence related to a second piece uplink control information and transmits the masked first piece of uplink control information to an uplink channel. | 01-15-2015 |
20150016377 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION - Disclosed are a method and an apparatus for uplink transmission. A method for uplink transmission for a machine-type communication (MTC) terminal comprises: a step of transmitting first uplink (UL) information via a first UL channel in a first terminal-specific frequency band of a first subframe; and a step of transmitting second UL information via a second UL channel in a second terminal-specific frequency band of a second subframe subsequent to the first subframe. The first subframe and the second subframe each include a plurality of orthogonal frequency division multiplexing (OFDM) symbols. If the first terminal-specific frequency band and the second terminal-specific frequency band do not overlap one another, the second UL information may not be transmitted in a first OFDM symbol of the second subframe. Thus, a wireless resource can be efficiently utilized. | 01-15-2015 |
20150036653 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA - A method and apparatus of transmitting and receiving data is provided. A user equipment receives physical downlink shared channel data on a PDSCH in a second subframe from a second serving cell to the user equipment. The second serving cell is activated by the first serving cell, and the second serving cell does not map the PDSCH data to a second RE corresponding to a first resource element of the first subframe mapped with the CRS. The CRS is generated from a pseudo random sequence that is initiated by a cell identifier of the first serving cell and the PDSCH is indicated by an enhanced physical downlink shared channel of the second subframe, and the second RE of the second subframe and the first RE of the first subframe overlap in a time domain and in a frequency domain. | 02-05-2015 |
20150043458 | METHOD AND APPARATUS FOR TRANSMITTING PERIODIC CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method for transmitting uplink control information by a user equipment in a wireless communication system, and a user equipment using the method. In the method, a setting of subframes for transmitting each of multiple types of periodic channel state information (CSI) is received, and the multiple types of the periodic CSI from the subframes are transmitted, wherein when the multiple types of the CSI are set to include a rank indicator (RI) for indicating the number of layers recommended by the user equipment, and the RI and a different periodic CSI excluding the RI are set to be transmitted from the same subframe, the RI and the different periodic CSI are multiplexed to the same subframe and then transmitted. | 02-12-2015 |
20150043462 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method and an apparatus for transmitting uplink control information in a wireless communication system are provided. A first Reed-Muller (RM) encoder encodes first uplink control information on the basis of a first RM basis, and a second RM encoder encoded second uplink control information on the basis of a second RM basis. | 02-12-2015 |
20150043470 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION - Provided is a method and an apparatus for transmitting uplink control information in a wireless communication system. A wireless device determines the number of a plurality of Reed-Muller (RM) encoders based on the number of bits of a bit sequence indicating uplink control information, and divides the bit sequence based on the determined number of the plurality of RM encoders to generate a plurality of sub-sequences. The wireless device inputs the plurality of sub-sequences into the respective plurality of RM encoders to generate a coded sequence, maps the coded sequence according to a modulation method to generate a plurality of modulated symbols, and transmits the plurality of modulated symbols on an uplink channel. | 02-12-2015 |
20150049687 | METHOD AND APPARATUS FOR COMMUNICATING BY USING DIFFERENT TYPES OF CARRIERS IN RADIO COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - Provided through the present application are a method and an apparatus for use in a radio communication system, which supports carrier aggregation and carries out communication in subframe units. More specifically, user equipment operating in a first type carrier for receiving from a base station, a first piece of control information, which is related to the first type carrier and a second type carrier that support the carrier aggregation, can measure a radio signal to carry out radio resource management with respect to the first type carrier by using a first reference signal, which is included in the first type carrier, and/or a second reference signal, which is included in the second type carrier. | 02-19-2015 |
20150055521 | METHOD AND DEVICE FOR AGGREGATING CARRIERS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and a device for aggregating carriers in a wireless communication system. In the method, a first carrier is configured, and a second carrier is configured in addition to the first carrier. The first carrier is a time division duplex (TDD) carrier for which an uplink subframe and a downlink subframe are positioned at different times in a frame, and the second carrier is a carrier only for an uplink, which consists of uplink subframes. | 02-26-2015 |
20150055574 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNAL - Disclosed are a method and an apparatus for transmitting a reference signal. The method for transmitting the reference signal comprises the step of: transmitting a secondary synchronization signal (SSS) and a primary synchronization signal (PSS) from a subframe including an N (natural number wherein N>1) number of resource blocks (RB) and a plurality of orthogonal frequency division multiplexing (OFDM) symbols; and transmitting from the subframe the reference signal which is generated on the basis of a cell identifier, wherein the reference signal can be transmitted from an M (natural number wherein K<=M02-26-2015 | |
20150055606 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - A method for transmitting uplink control information. The method according to an embodiment includes identifying a Hybrid Automatic Repeat reQuest—Acknowledgement (HARQ-ACK)(0) and a HARQ-ACK(1), and transmitting b(0)b(1) using a PUCCH resource among a plurality of PUCCH resources based on the HARQ-ACK(0) and the HARQ-ACK(1). a Physical Downlink Control Channel (PDCCH) on the primary cell. | 02-26-2015 |
20150063140 | METHOD FOR MEASURING CHANNEL USING TRACKING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE USING SAME - A method for measuring a channel in a wireless communication system is provided. A terminal receives a first reference signal from a primary cell. The terminal receives a second reference signal from a secondary cell corresponding to the primary cell. The terminal measures a channel for the secondary cell on the basis of the second reference signal. A subframe in which the second reference signal is received is signaled from the primary cell. | 03-05-2015 |
20150063179 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS THEREFOR - A method and a communication device are described for transmitting uplink control information in a wireless communication system supporting carrier aggregation. At least one of a plurality of physical downlink control channels (PDCCHs) indicating downlink semi-persistent scheduling (SPS) release or physical downlink shared channels (PDSCHs) is received in a plurality of downlink subframes according to an uplink (UL) downlink (DL) configuration for time division duplex (TDD). A PDCCH with a downlink control information (DCI) format for UL scheduling including a 2-bit field is received. Acknowledgement (ACK)/negative acknowledgement (NACK) information corresponding to the at least one PDCCH indicating downlink SPS release or the PDSCHs is transmitted through a physical uplink shared channel (PUSCH) based on the received PDCCH with the DCI format for UL scheduling. | 03-05-2015 |
20150071099 | Method and Apparatus for Receiving Downlink Data in Wireless Communication System - Provided is a method for receiving downlink data in a wireless communication system. User equipment (UE) receives downlink control information in a first subframe from a primary cell. The user equipment receives downlink data from a secondary cell in a second subframe over a physical downlink shared channel (PDSCH). The user equipment determines a transmission block size in accordance with the type of the carrier of the second subframe. The user equipment decodes the PDSCH on the basis of the downlink control information and the transmission block size. | 03-12-2015 |
20150071206 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method and apparatus for transmitting sounding reference signals in wireless communication systems. The method includes the steps of: receiving sounding reference signal (SRS) setting information indicating an SRS transmitting scheme for an uplink carrier; and transmitting the SRS in the SRS transmitting scheme determined on the basis of the SRS setting information, wherein the SRS transmitting scheme is intended for transmitting the SRS in all of the bands of the uplink carrier, or in some of the bands of the uplink carrier. | 03-12-2015 |
20150078222 | SIGNAL-TRANSCEIVING METHOD, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting an uplink signal in a time division duplex (TDD)-based wireless communication system. The method comprises the steps of receiving scheduling information for data transmission in a first uplink subframe, and transmitting uplink data based on the scheduling information. The uplink data transmission period includes the first uplink subframe, and further includes, if the second subframe immediately before the first uplink subframe is a subframe including a downlink period, a guard period and an uplink period, and if a predetermined condition is satisfied, an uplink period of a second subframe. | 03-19-2015 |
20150078225 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method is described for transmitting uplink control information at a communication apparatus configured with a plurality of cells including a Primary Cell (PCell) and a Secondary Cell (SCell) in a wireless communication system operating in a Time Division Duplex (TDD) mode. One or more downlink signals requiring Hybrid Automatic Repeat reQuest Acknowledgement (HARQ-ACK) feedback are received in a set of subframes. Reception response information about the one or more downlink signals is transmitted through a Physical Uplink Control CHannel (PUCCH) on a subframe configured for Scheduling Request (SR) transmission. When a predetermined condition is not satisfied, the reception response information and SR information are multiplexed and transmitted using a first HARQ-ACK PUCCH resource. When the predetermined condition is satisfied, for a positive SR, the reception response information includes information about an ACK count for the one or more downlink signals and is transmitted using a SR PUCCH resource. | 03-19-2015 |
20150078285 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK DATA IN A WIRELESS COMMUNICATION SYSTEM - A method for receiving downlink data in a wireless communication system is provided. A user equipment receives downlink control information via a downlink control channel in a subframe. The downlink control information includes reference signal (RS) information and physical downlink shared channel (PDSCH) information. The RS information indicates transmission antenna ports, a scrambling identity and a number of transmission layers. The user equipment receives a RS for demodulating a PDSCH based on the RS information in the subframe. The RS is generated based on the scrambling identity. The user equipment receives downlink data via the PDSCH in the subframe. Resource element (RE) mapping information on REs assigned for the PDSCH is determined based on the PDSCH information. | 03-19-2015 |
20150085782 | METHOD AND APPARATUS FOR MAKING HARQS IN CARRIER AGGREGATION SYSTEMS - The present invention relates to a method and system for making a hybrid automatic repeat requests (HARQ) in a carrier aggregation system. The method receives downlink data through a first subframe of a first carrier, transmits acknowledgement/negative-acknowledgement (ACK/NACK) for the downlink data through a second subframe of a second carrier, and re-receives the downlink data through a third subframe of the first carrier, wherein the first carrier only includes the downlink subframes, and the second carrier includes the uplink subframes and the downlink subframes. | 03-26-2015 |
20150085785 | DATA TRANSMISSION METHOD AND DATA TRANSMISSION DEVICE - A data transmission method and a data transmission device are disclosed. A method for receiving control data by a terminal can comprise the steps of demodulating downlink control information (DCI) including an assignment flag and downlink (DL) resource allocation; and demodulating physical downlink shared channel (PDSCH) data by using the DL resource allocation, wherein when the PDSCH data is demodulated on the basis of a demodulation reference signal (DM-RS), the assignment flag indicates information on a reference signal (RS) used for the demodulation of the PDSCH data or information on a PDSCH transmission antenna port. | 03-26-2015 |
20150092691 | METHOD OF RECEIVING DOWNLINK DATA AND WIRELESS DEVICE USING THE METHOD - A method of receiving downlink data in a wireless communication system and a wireless device are provided. The wireless device determines energy per resource element (EPRE) of a reference signal that is received in a transmission bandwidth of an orthogonal frequency division multiplexing (OFDM) symbol and determines the power ratio of the EPRE of the reference signal to the EPRE of a Physical Downlink Shared Channel (PDSCH) on the basis of the transmission bandwidth. The wireless device determines the EPRE of the PDSCH on the basis of the EPRE of the reference signal and the power ratio and demodulates the PDSCH. | 04-02-2015 |
20150092694 | METHOD FOR TRANSMITTING CONTROL INFORMATION ON LOW-COST MACHINE-TYPE COMMUNICATION, AND APPARATUS FOR SUPPORTING SAME - The present invention relates to a method for transmitting and receiving an uplink signal for low-cost machine-type communication (MTC) used in a wireless communication system, and the apparatuses for supporting same. The base station of the present invention sets a maximum number of RBs capable of being allocated to the MTC device to be smaller than the total number of RBs in a system band supported by the base station. The MTC device of the present invention transmits an uplink signal through a physical uplink shared channel (PUSCH) on the basis of the maximum number of RBs capable of being allocated to the MTC device. | 04-02-2015 |
20150092698 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting channel state information (CSI) by a terminal in a wireless communication system. The method sets a group including a plurality of cells, receives parameters for CSI transmission timings for the plurality of cells, and determines the CSI transmission timings for the plurality of cells on the basis of the parameters. The CSI transmission timings for at least two cells from among the plurality of cells are aligned to be the same. | 04-02-2015 |
20150103705 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A method for transmitting uplink control information by a user equipment in a wireless communication system supporting carrier aggregation of a plurality of cells and operating in a time division duplex (TDD). The method according to one embodiment includes receiving, by the user equipment, downlink signals on the plurality of cells, each of the downlink signals requiring a hybrid automatic repeat request acknowledgement (HARQ-ACK) response; and transmitting, by the user equipment, the uplink control information including at least one per-cell HARQ-ACK bit for each cell in an uplink subframe via a physical uplink shared channel (PUSCH). When a reference uplink-downlink (UL-DL) configuration for performing the receiving and the transmitting belongs to a first UL-DL configuration set on each of the plurality of cells, a number of the at least one per-cell HARQ-ACK bit for each cell is determined using a value of min (W, Mc). Min (W, Mc) denotes a smallest value of W and Mc, W denotes a value indicated by 2-bit downlink assignment index (DAI) information included in downlink control information corresponding to the PUSCH, and Mc denotes a number of downlink subframes corresponding to the uplink subframe for each cell. | 04-16-2015 |
20150106681 | ENCODING METHOD AND ENCODING APPARATUS IN A WIRELESS COMMUNICATIONS SYSTEM - Provided are an encoding method and an encoding apparatus in a wireless communications system. The encoding apparatus generates an error detection code for a first UCI (uplink control information), and adds the error detection code to a second UCI. The encoding apparatus encodes the first UCI, and then the second UCI added with the error detection code. | 04-16-2015 |
20150110029 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION - A method of transmitting uplink control information in a wireless communication system is provided. The method may include: determining whether to simultaneously transmit a hybrid automatic repeat request (HARQ) ACK/NACK and channel state information (CSI) from a sub frame; generating an added HARQ ACK/NACK by adding additional bits having a number of bits corresponding to the number of bits of the CSI to the bits of the HARQ ACK/NACK if it is determined that simultaneous transmission is performed; generating an encoded HARQ ACK/NACK by encoding the added HARQ ACK/NACK; generating a plurality of modulation symbols by modulating the encoded HARQ ACK/NACK; and transmitting the plurality of modulation symbols from the sub frame to an uplink control channel. | 04-23-2015 |
20150110033 | METHOD AND APPARATUS FOR TRANSMITTING DATA - The present invention relates to a method and apparatus for transmitting data. The method for a terminal to receive downlink data includes the steps of: receiving resource allocation information from a base station; and demodulating the downlink data transmitted through a sub-resource allocation unit allocated on the basis of the resource allocation information, wherein the sub-resource allocation unit is a plurality of resource units included in one resource allocation unit and the downlink data can be demodulated on the basis of a demodulation reference signal (DM_RS). | 04-23-2015 |
20150117345 | METHOD OF DEMODULATING DATA ON NEW TYPE OF CARRIER WAVE - A method of demodulating data according to an embodiment of the present invention is presented. The method of demodulating data may include: setting a terminal to be in a transmission mode of PDSCH to which transmission diversity is applied; receiving resource allocation information on the PDSCH by the terminal; transmitting downlink (DL) data onto the PDSCH to which the transmission diversity is applied, according to the resource allocation information; receiving, from a base station, information on the number of antenna ports used for receiving a reference signal that is used for demodulating the DL data; and receiving a reference signal used for demodulating the DL data. The reference signal may be generated based on the identifier of the terminal, and the number of antenna ports used for receiving the reference signal may be the same as the number of antenna ports used for receiving the PDSCH. | 04-30-2015 |
20150124667 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method for transmitting uplink control information at a communication apparatus in a time division duplex (TDD) wireless communication system. The method according to one embodiment includes receiving at least one physical downlink control channel (PDCCH) or at least one physical downlink shared channel (PDSCH); and generating reception response information for the at least one PDCCH or the at least one PDSCH. When the reception response information and channel status information are configured to be transmitted in a same subframe, if a certain condition is satisfied, the reception response information and the channel status information are transmitted together using a first physical uplink control channel (PUCCH) format. The certain condition includes a first condition of a single PDCCH transmission only on a primary cell (PCell) that has a downlink assignment index (DAI) initial value and indicates a semi-persistent scheduling (SPS) release being present. | 05-07-2015 |
20150124724 | CONTROL SIGNAL TRANSCEIVING METHOD AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for receiving control information in a wireless communication system in which a first carrier type and a second carrier type are aggregated. The method comprises a step of receiving grant information for signal transmission on the second carrier type, wherein the grant information is received through the second carrier type if the grant information includes a first downlink control information (DCI) format, wherein the grant information is received through the first carrier type if the grant information includes a second DCI format. | 05-07-2015 |
20150124759 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced control channel-based operation. A method for a base station for transmitting a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: determining one antenna port to be used for the downlink control channel; mapping the downlink control channel to a resource element on the basis of a reference signal for the one antenna port; and transmitting the mapped downlink control channel to a terminal, wherein an index for the one antenna port can be determined on the basis of a control channel element (CCE) index of the downlink control channel derived from the terminal identifier. | 05-07-2015 |
20150124760 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced-control channel-based operation. A method for a terminal for transmitting confirmation response information in a wireless communication system according to one embodiment of the present invention comprises a step for transmitting confirmation response information for a downlink data channel by means of an uplink control channel resource, wherein an index for the uplink control channel resource can be determined on the basis of a delegate antenna port of a downlink control channel derived from the identifier of the terminal. | 05-07-2015 |
20150131546 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for allocating resources in a wireless communication system are provided. The method is characterized by dividing a system bandwidth into a multiple of a resource block group (RBG) to form subbands and transmitting allocation information for indicating allocated subbands among the subbands and resource allocation within the subbands. | 05-14-2015 |
20150131564 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting an uplink control signal of a terminal in a wireless communication system and a terminal using the method are provided. The method comprises the steps of: setting a first physical uplink control channel (PUCCH) resource for a first antenna port; setting a second PUCCH resource for a second antenna port; and transmitting a same uplink control signal through the first and second antenna ports by using the first and second PUCCH resources, wherein the first and second PUCCH resources are orthogonal to each other. | 05-14-2015 |
20150131568 | METHOD AND USER EQUIPMENT FOR TRANSMITTING CHANNEL STATE INFORMATION AND METHOD AND BASE STATION FOR RECEIVING CHANNEL STATE INFORMATION - The present invention provides a method and a device for transmitting or receiving channel state information (CSI). According to the present invention, when a user equipment can be set with one or more CSI processes per serving cell, a CSI request field included in downlink control information for a specific serving cell indicates at least whether a non-periodic CSI report triggered by the CSI request field is triggered for a set of CSI process(es) set by a higher layer from among the CSI process(es) for the one serving cell. | 05-14-2015 |
20150146634 | METHOD AND DEVICE FOR REPORTING CHANNEL STATE INFORMATION - A method and device for reporting channel state information (CSI) is provided. A wireless device codes uplink control information (UCI) including CSI to create encoded UCI and transmits the encoded UCI. When the CSI includes a rank indicator (RI), the payload size of the CSI is determined according to the RI, and if the CSI does not include the RI, the payload size of the CSI is fixed. | 05-28-2015 |
20150155928 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for transmitting channel state information (CSI) on a terminal having a plurality of cells allocated in a wireless communication system. The method includes the steps of: setting a plurality of cells as a plurality of groups, at least one of the groups including a plurality of cells; determining a priority for each of the groups; and transmitting multiple pieces of CSI for a top priority group having a highest priority from among the groups on the basis of the priority, wherein, when the top priority group includes two or more cells, the CSI includes each piece of CSI on each of the two or more cells. | 06-04-2015 |
20150156762 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK DATA - Provided are a method and apparatus for transmitting uplink data. The method for transmitting data in a uplink subframe comprises the steps of: determining whether or not a hybrid automatic retransmission request-acknowledgement (HARQ-ACK) and uplink control information (UCI) are being simultaneously transmitted in the uplink subframe; selecting either the HARQ-ACK or UCI on the basis of the HARQ-ACK state for HARQ-ACK upon the occurrence of simultaneous transmission; and transmitting the selected HARQ-ACK or UCI in the uplink subframe. | 06-04-2015 |
20150163830 | METHOD FOR TRANSMITTING RANDOM ACCESS PREAMBLE, AND WIRELESS DEVICE - Provided is a method and an apparatus for transmitting a random access preamble in a time division duplex (TDD)-based wireless communication system. A wireless device selects an UL subframe in which a random access preamble is to be transmitted in a first serving cell. If the next subframe following the selected UL subframe is a DL subframe and the length of the random access preamble exceeds the UL subframe, the random access preamble may be generated such that the length of the random access preamble may not exceed the UL subframe. | 06-11-2015 |
20150181624 | METHOD AND TERMINAL FOR RANDOM ACCESS TO SMALL CELL - The present invention relates to a method for random access to a small cell by means of a terminal. The method can include the steps of: receiving a plurality of settings for a random access preamble; selecting one of the plurality of settings; and transmitting the random access preamble according to the one selected setting. Here, a resource on which the random access preamble can be transmitted can be provided in plurality in one subframe, and the preamble transmitted on each resource is distinguishable. | 06-25-2015 |
20150195062 | METHOD AND TERMINAL FOR PERFORMING HARQ - One disclosure of the present invention provides a method for performing a HARQ in a carrier aggregation. The method can comprise a step of receiving setting information with respect to a plurality of cell groups for setting a HARQ ACK/NACK, wherein each of the plurality of cell groups can comprise one or a plurality of serving cells. The method may comprise the steps of: allocating a number of bits of the HARQ ACK/NACK to cell group units, in accordance with the setting information; and transmitting the HARQ ACK/NACK to a relevant cell group in accordance with the number of bits of the HARQ ACK/NACK that are allocated. | 07-09-2015 |
20150208361 | METHOD AND DEVICE FOR CONTROLLING TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM - In an embodiment according to the present invention, a method of controlling transmission power by a terminal in a wireless communication system includes: receiving information on a change in transmission power in a first time section; and estimating path attenuation and performing up-link transmission power control by using the estimated path attenuation, wherein if the estimation of the path attenuation is performed in a second time section following the first time section, information on the change in transmission power is considered when estimating the path attenuation. | 07-23-2015 |
20150208402 | METHOD AND DEVICE FOR TRANSMITTING UPLINK CONTROL INFORMATION - One embodiment of the present specification discloses a method for transmitting uplink control information (UCI). The method may be performed by a terminal and comprise receiving control information for setting such that an uplink control channel and an uplink shared channel are not simultaneously transmitted on one uplink subframe; selecting one of the channels, if first uplink control information (UCI) for a first cell and second uplink control information (UCI) for a second cell are requested to be simultaneously transmitted on the one uplink subframe through the uplink control channel in case of the first uplink control information (UCI) and through the uplink shared channel in case of the second uplink control information (UCI); and transmitting at least one from among the first uplink control information (UCI) and the second uplink control information (UCI) on the uplink subframe through the selected channel. | 07-23-2015 |
20150208407 | METHOD FOR TRANSMITTING/RECEIVING SIGNAL AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method comprising: setting a first cell having a first TDD UL-DL configuration and a second cell having a second TDD UL-DL configuration; receiving a PHICH signal in a subframe #(n−L) of the first cell, or receiving a PDCCH signal in a subframe #(n−K) of the first cell; and transmitting a PUSCH signal in a subframe #n of the second cell, corresponding to the PHICH signal or the PDCCH signal, wherein the relationship between the subframes #(n−L), #(n−K), and #n is determined in consideration of a parameter value set in a specific TDD UL-DL configuration, which is the TDD UL-DL configuration having the least number of UL subframes from TDD UL-DL configuration(s), in which subframes set as UL in the first or second cell are all set as ULs. | 07-23-2015 |
20150237611 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION - The present invention relates to a wireless communication system. Specifically, the present invention relates to a method for transmitting uplink control information and to an apparatus for the same. The present invention relates to a method and to a device for said method which comprises the steps of selecting one uplink control channel resource corresponding to a plurality of HARQ-ACKs from among a plurality of uplink control channel resources, and transmitting a bit value corresponding to the plurality of HARQ-ACKs by using the selected uplink control channel resource. | 08-20-2015 |
20150237619 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION - A method of receiving uplink control information at a communication apparatus in a wireless communication system configured for Time Division Duplex (TDD) operations and having a plurality of cells is described. A first set of at least one of one or more Physical Downlink Control Channel (PDCCH) signals and one or more Physical Downlink Shared Channel (PDSCH) signals are transmitted within M downlink subframes, where M≧1. A second set of at least one of one or more PDCCH signals and one or more PDSCH signals are transmitted within N downlink subframes, where N≧1. Acknowledgment information is received on an uplink subframe, the acknowledgment information including first acknowledgment information corresponding to the first set and second acknowledgment information corresponding to the second set. | 08-20-2015 |
20150245344 | METHOD AND USER DEVICE FOR RECEIVING DOWNLINK SIGNAL, AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK SIGNAL - The present invention relates to a method and user device for transmitting first ACK/NACK information on a first cell group including a primary cell and one or more secondary cells from among a plurality of serving cells on a physical uplink control channel (PUCCH) of a specific cell in the first cell group, and to a method and base station for receiving the first ACK/NACK information on the PUCCH of the specific cell. When the first ACK/NACK information includes only ACIQNACK for the primary cell, the specific cell is the primary cell, and, when the first ACK/NACK information includes ACK/NACK on at least one of the one or more secondary cells, the specific cell is a secondary cell from among the one or more secondary cells of the first cell group that is set for the ACK/NACK transmission. | 08-27-2015 |
20150249975 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, particularly, a method in which a terminal transmits control information in a CA-based wireless communication system and an apparatus for the method, the method comprising: configuring a first cell and a second cell having different subframe configurations, wherein the second cell has any one of UL-DL configuration #0 to #6; receiving a DC) format including a DAI field, for the second cell; and transmitting HARQ-ACK information relating to the downlink DCI format. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the DAI field is used in a process of transmitting the HARQ-ACK information. For HARQ-ACK timing, in cases where a reference UL-DL configuration applied to the second cell is #0, the DAI field is not used in a process of transmitting the HARQ-ACK information. | 09-03-2015 |
20150257135 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method in which a terminal transmits control information in a CA-based wireless communication system and to an apparatus for the method, the method comprising: a step of configuring a first cell and a second cell having different subframe configurations, the second cell has UL-DL configuration #0; a step of receiving a downlink control information (DCI) format including an N-bit field (N>1), for the second cell; and a step of transmitting a physical uplink shared channel (PUSCH) signal corresponding to the downlink DCI format through a subframe. The N-bit field indicates either an uplink (UL) index or a downlink assignment index (DAI). For PUSCH timing, in cases where a reference UL-DL configuration applied to the second cell is any one of UL-DL configurations #1 to #6, the N-bit field indicates the DAI. | 09-10-2015 |
20150280876 | METHOD AND APPARATUS FOR TRANSMITTING DATA, AND METHOD AND APPARATUS FOR TRANSMITTING DATA - The present invention provides a method and apparatus for transmitting data and a method and apparatus for receiving data, wherein said methods transmit/receive a reference signal in sub-frames bundled for data transmission/reception using at least an identical precoding matrix, an identical reference signal sequence, an identical reference signal generating identifier, or an identical reference signal scrambling sequence. | 10-01-2015 |
20150282126 | METHOD FOR TRANSCEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a terminal for receiving a downlink signal from a plurality of cells according to the semi-persistent scheduling (SPS) method in a wireless communication system. Specifically, the method comprises the steps of: receiving, in a first subframe, a first or second type scheduling information indicating an activation, according to the SPS method, from a serving cell from among the plurality of cells; and, in the first subframe and a second subframe configured via a higher layer after the first subframe, receiving the downlink signal from one cell from among the plurality of cells in accordance with resource allocation information comprised in the first or the second type scheduling information, wherein the first type scheduling information comprises quasi co-location (QCL) information for the serving cell and the one cell, and the QCL information applied in the first and second subframes is updated in accordance with the type of the scheduling information. | 10-01-2015 |
Patent application number | Description | Published |
20100035541 | Method of operating relay station in wireless communication system - A method of operating a relay station in a wireless communication system is provided. The method comprises the steps of determining a relay mode and transmitting a signal, received from a source station, to a destination station in the determined relay mode, wherein the relay mode is determined based on at least one of requirements for quality of service (QoS) of traffic, the number of times in which attempts are made to transmit a packet, and an amount of packets stored in a buffer of the relay station. | 02-11-2010 |
20100041409 | Method of transmitting data in multi-cell cooperative wireless communication system - A method of transmitting data in a multi-cell cooperative wireless communication system is provided. The method includes dividing the data into common data and private data, determining a transmission rate and/or a transmission power of the common data and the private data, respectively and transmitting the common data and the private data at the determined transmission rate and/or transmission power. It is possible to mitigate inter-cell interference and improve the performance of the system. | 02-18-2010 |
20120057519 | METHOD FOR TRANSMITTING CONTROL SIGNAL TO RELAY NODE AT BASE STATION IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a control signal to a relay node at a base station in a multi-input multi-output (MIMO) wireless communication system is disclosed. The method comprises configuring relay-resource element groups (R-REGs) in a unit of four resource elements (REs) contiguous in the ascending order of subcarrier indexes, except for resource elements for a reference signal (RS); allocating transmission resources to the control signal in a unit of the relay-resource element group; and transmitting the control signal to the relay node by using the allocated transmission resources, wherein the resource elements for the reference signal include resource elements for channel state information-RS (CSI-RS), which include resource elements for a channel state information RS to which a transmission power of 0 is allocated. | 03-08-2012 |
20120287875 | METHOD AND APPARATUS FOR PROVIDING CHANNEL STATE INFORMATION-REFERENCE SIGNAL (CSI-RS) CONFIGURATION INFORMATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method and apparatus for transmitting and receiving a Channel State Information-Reference Signal (CSI-RS) in a wireless communication system supporting multiple antennas are disclosed. The method includes transmitting, at a base station, information of one or more CSI-RS configurations to a mobile station, wherein the one or more CSI-RS configurations include one CSI-RS configuration for which the mobile station assumes non-zero transmission power for CSI-RS, transmitting, at the base station, information indicating a CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS among the one or more CSI-RS configurations to the mobile station, mapping, at the base station, CSI-RSs to resource elements of a downlink subframe based on the one or more CSI-RS configurations, and transmitting, at the base station, the downlink subframe mapped with the CSI-RSs to the mobile station. | 11-15-2012 |
20120320816 | METHOD AND APPARATUS FOR DETERMINING SIZE OF TRANSPORT BLOCK TRANSMITTED BY BASE STATION TO RELAY NODE IN RADIO COMMUNICATION SYSTEM - A method for receiving a Relay node dedicated Physical Downlink Shared Channel (R-PDSCH) from a base station by a relay node in a radio communication system is disclosed. The method includes receiving, from the base station, a Modulation and Coding Scheme (MCS) index and the number NR-PDSCHPRB1 of first resource blocks to which the R-PDSCH is transmitted, under the assumption that a Relay node dedicated Physical Downlink Control Channel (R-PDCCH) is not transmitted, estimating the number NR-PDSCHPRB2 of second resource blocks to which the R-PDSCH is actually transmitted, using the number NR-PDSCHPRB1 of the first resource blocks and using the number NR-PDCCHPRB of resource blocks to which the R-PDCCH is transmitted, selecting the size of a transport block mapped to the R-PDSCH, using the number NR-PDSCHPRB2 of the second resource blocks and using a transport block index corresponding to the MCS index, and decoding the R-PDSCH, using the size of the transport block and using a modulation order corresponding to the MCS index. | 12-20-2012 |
20130010635 | METHOD FOR CONTROLLING DOWNLINK TRANSMISSION POWER AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. Particularly, the present invention relates to a method in which a home base station performs power control and an apparatus for the same, the method comprising the steps of: acquiring information on downlink signal strength of a macrocell; and determining an upper limit of downlink transmission power of the home base station by taking into consideration of the downlink signal strength of the macrocell, wherein: when a predetermined condition is satisfied, the upper limit of the downlink transmission power of the home base station is determined to be an intermediate value among a minimum transmission power value, a maximum transmission power value, and a power control value proportional to the downlink signal strength of the macrocell; and when the predetermined condition is not satisfied, the upper limit of the downlink transmission power of the home base station is determined to be a predetermined fixed value, the predetermined condition being a value indicating the downlink signal strength of the macrocell is equal to or greater than a first threshold value. | 01-10-2013 |
20130010682 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL - The present invention relates to A METHOD AND A DEVICE FOR RECEIVING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM. More specifically, the method of the present invention comprises the following steps: receiving first control information for downlink scheduling in the first slot of a resource block pair, wherein the first control information includes allocation information on at least one resource unit; receiving a data in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a first value; and attempting to detect second control information for uplink scheduling in the second slot of the resource block pair, when the allocation information on the resource unit having the resource block pair with the first control information has a second value. | 01-10-2013 |
20130010685 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING R-PDCCH - A method and apparatus for transmitting and receiving a Relay Physical Downlink Control Channel (R-PDCCH) being a control channel for a relay node (RN) in a wireless communication system are disclosed. To transmit an R-PDCCH to a RN, a BS includes a processor for interleaving a predetermined number of Control Channel Elements (CCEs), mapping the interleaved CCEs to at least one Virtual Resource Block (VRB) configured for R-PDCCH transmission, mapping the at least one VRB to at least one Physical Resource Block (PRB), and a transmitter for transmitting the R-PDCCH to the RN through the at least one PRB. | 01-10-2013 |
20130033998 | METHOD AND APPARATUS FOR MEASUREMENT FOR INTER-CELL INTERFERENCE COORDINATION IN RADIO COMMUNICATION SYSTEM - A wireless communication system and, more specifically, a measurement method and apparatus for inter-cell interference coordination in a wireless communication system are disclosed. Herein, a method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system includes the steps of acquiring information of downlink subframe configuration of a second base station, determining measurement objects of downlink resource of the first base station based on the downlink subframe configuration of the second base station; transmitting information of the measurement objects to the UE, and receiving measurement result for the measurement objects from the UE. | 02-07-2013 |
20130034072 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL - The present invention relates to a method and a device for receiving a downlink control signal in a wireless communication system. More specifically, the present invention relates to a device and a method for receiving control information, the method comprising the following steps: receiving a subframe which includes two slots; executing a blind decoding for a first control channel in the control channel search region within a first slot; decoding a second control channel using a specific resource within a second slot when the first control channel has been detected; and executing a blind decoding for the second control channel in the control channel search region within the second slot when the first control channel has not been detected. | 02-07-2013 |
20130039254 | METHOD FOR BACKHAUL SUBFRAME SETTING BETWEEN A BASE STATION AND A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR - Disclosed is a method whereby a relay node receives a signal from a base station in a wireless communication system. More specifically, the invention comprises: a step in which a relay node receives, from the base station, a request signal for changing the size of a downlink physical control channel transmitted to a terminal corresponding to the relay node; a step in which a signal in response to the request signal is sent to the base station; a step of setting a downlink available symbol between the base station and the relay node, based on the request signal; and a step in which a relay node specific signal, sent from the base station, is received from the downlink available symbol. | 02-14-2013 |
20130044712 | METHOD FOR TRANSCEIVING SIGNALS BETWEEN A BASE STATION AND A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present application relates to a method in which a relay node receives control signals from a base station in a wireless communication system. More particularly, the method comprises: a step of receiving, from the base station, a relay-node-dedicated physical downlink control channel (R-PDCCH) via a specific subframe; and a step of performing a blind decoding process on the physical downlink control channel to detect control information for the relay node, wherein said specific subframe includes a first slot and a second slot, and the size of a relay-node-dedicated control channel element (R-CCE) for performing the blind decoding process is individually defined depending on the number of reference signals contained in the first slot and in the second slot. | 02-21-2013 |
20130051275 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN MULTI-CARRIER WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting channel status information (CSI) in a wireless communication system which supports multiple carriers. According to one embodiment of the present invention, a method for transmitting channel status information for multiple carriers comprises the steps of: measuring downlink channels for first and second carriers which are closely placed to each other on the frequency domain; determining channel status information for the first carrier on the basis of a result of the channel measurement for the first carrier; determining channel status information for the second carrier on the basis of a part of the channel status information for the first carrier and a result of the channel measurement for the second carrier; and transmitting channel status information for the first and second carriers. | 02-28-2013 |
20130058304 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNALS - The present invention relates to a method and device for receiving downlink signals in a wireless communication system. In more detail, the method for receiving downlink signals includes: receiving first control information for downlink scheduling through a first slot in a pair of resource blocks (RBs), the first control information including allocation information on a plurality of continuous RBs; receiving data from a second slot in a pair of RBs if the pair of RBs includes the first control information in the plurality of continuous RBs; and, if the pair of RBs outside the plurality of continuous RBs includes the first control information, attempting to detect second control information on uplink scheduling through a second slot of a pair of RBs. | 03-07-2013 |
20130064099 | METHOD FOR ALLOCATING RESOURCES IN A WIRELESS COMMUNICATION SYSTEM AND A DEVICE FOR THE SAME - The present invention relates to a wireless communication system and preferably to a wireless communication system comprising a relay. More specifically, the present invention relates to a method for allocating backhaul resources and to a device for the same. Also, the present invention relates to a method for allocating resources for a physical control channel and to a device for the same. Also, the present invention relates to a method for processing downlink signals and to a device for the same. | 03-14-2013 |
20130064174 | METHOD OF RECEIVING DATA FROM BASE STATION AT RELAY NODE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method used by a relay node for receiving a relay node specific downlink physical shared channel from a base station in a multiple antennae wireless communication system is disclosed. More specifically, the method includes the steps of demodulating a relay node specific downlink physical control channel (R-PDCCH) by using a relay node specific reference signal; and, in case a specific downlink information is detected from the demodulated relay node specific downlink physical control channel, of demodulating the relay node specific downlink physical shared channel, under an assumption that the relay node specific downlink physical shared channel is transmitted through a single antenna port by using a predetermined antenna port and scrambling identifier (ID). Herein, the specific downlink control information may correspond to a downlink control information designating a Fallback Mode. And, the predetermined antenna port and scrambling ID may respectively correspond to antenna port 7 and scrambling ID 0. | 03-14-2013 |
20130077543 | METHOD FOR PERFORMING A HARQ PROCESS AND APPARATUS USING SAME - The present description relates to a method for performing a HARQ process operation in a wireless communication system and to an apparatus using the method. A base station device which performs a HARQ process operation comprises a transmitter which transmits to a relay an uplink (UL) grant in a downlink backhaul subframe n which is a subframe having an index n among the allocated downlink backhaul subframes, and transmits, if downlink data sent from the relay in accordance with the uplink grant is not successfully received, a non-acknowledgement (NACK) signal in a downlink backhaul subframe n+N which is a downlink backhaul subframe that comes after N which is a predetermined number of HARQ processes counted from the downlink backhaul subframe n among the allocated downlink backhaul subframes. | 03-28-2013 |
20130083719 | METHOD FOR REPORTING A CHANNEL QUALITY INDICATOR BY A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method for reporting a channel quality indicator for a relay node-dedicated physical downlink shared channel (R-PDSCH) from a base station by a relay node in a wireless communication system. More particularly, the method comprises the following steps: receiving one or more reference signals from the base station; calculating a channel quality indicator for the R-PDSCH on the basis of one or more reference signals; and reporting the channel quality indicator to the base station. | 04-04-2013 |
20130088985 | METHOD FOR MEASURING A NEIGHBORING CELL AND AN APPARATUS THEREOF - A method of performing intra-frequency cell measurement by a user equipment (UE) in a wireless communication system is disclosed. The method includes determining a measurement gap for the intra-frequency cell measurement based on downlink control information received from an eNB, and performing the intra-frequency cell measurement for a neighboring cell during the measurement gap. The measurement gap corresponds to one or more downlink subframes other than a downlink subframe having downlink data for the UE indicated by the downlink control information. | 04-11-2013 |
20130094479 | METHODS FOR TRANSMITTING AND RECEIVING CHANNEL STATE INFORMATION (CSI) AND APPARATUSES THEREOF - A method for transmitting, by a user equipment (UE), a channel state information (CSI) in a wireless communication system is disclosed. The method includes receiving control information about a transmission of the CSI from a serving eNodeB, allocating a CSI combination composed of different CSIs to one subframe based on the received control information, and transmitting the CSI combination to the serving eNodeB in the allocated subframe, wherein the control information includes information on a maximum payload size of a CSI being able to be transmitted in one subframe, a transmission period and a transmission start time point of the CSI combination, and a transmission period and a transmission start time point of each of the different CSIs. | 04-18-2013 |
20130114498 | METHODS FOR TRANSMITTING AND RECEIVING DOWNLINK DATA IN MBSFN SUBFRAME AND APPARATUSES THEREOF - A method for receiving a downlink signal from a base station (BS) in a multicast broadcast single frequency network (MBSFN) subframe is disclosed. The method is performed by a user equipment (UE) and includes receiving information indicating an MBSFN subframe configured as an almost blank subframe (ABS) (ABS MBSFN subframe) among MBSFN subframes of which a data region is allocated a reduced transmission power lower than a transmission power in a data region of a normal subframe, and demodulating the downlink signal received in the data region of the ABS MBSFN subframe based on a cell-specific reference signal (CRS) in a control region of the ABS MBSFN subframe according to the information. | 05-09-2013 |
20130114539 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK SIGNALS - The present invention relates to a method and apparatus for receiving downlink signals in a wireless communication system. More specifically, the present invention relates to a method for receiving downlink signals in a wireless communication and an apparatus incorporating the same, wherein the method comprises the steps of: receiving a sub frame having two slots; blind decoding a plurality of R-PDCCH (Relay Physical Downlink Control Channel) candidates in order to receive control data from the search space of a first slot; and determining whether the R-PDCCH conveys control data for downlink transmission or uplink transmission when R-PDCCH was detected in the search space, wherein the control data for the downlink transmission and uplink transmission have an equal size of data. | 05-09-2013 |
20130114562 | METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting uplink transmission power control information by a base station in a wireless communication system, the method comprising: transmitting first transmission power control information, which is applied to a first uplink resource set, to a user equipment; transmitting second transmission power control information, which is applied to a second uplink resource set, to the user equipment; receiving an uplink signal, which is transmitted through one or more uplink resources of the first uplink resource set using uplink transmission power which is based on the first transmission power control information, from the user equipment; and receiving an uplink signal, which is transmitted through one or more uplink resources of the second uplink resource set using uplink transmission power which is based on the second transmission power control information, from the user equipment. | 05-09-2013 |
20130129014 | Method and Device for Sending and Receiving Precoded Signals on a Wireless Communication System - The present invention relates to a method for transmitting a precoded signal, the method comprising: determining a precoding matrix on the basis of the first matrix, which is determined from a first codebook including precoding matrices indicated by a first precoding matrix index (PMI), and the second matrix, which is determined from a second codebook including precoding matrices indicated by a second PMI; and transmitting the precoded signal using the determined precoding matrix to the receiver, wherein each precoding matrix contained in the first codebook is comprised of a block diagonal matrix, and individual blocks of the block diagonal matrix are configured independently of each other, and each precoding matrix contained in the second codebook is comprised of an upper element and a lower element, where the lower element includes a phase rotation value. | 05-23-2013 |
20130135988 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM SUPPORTING RELAY NODE - The present description relates to a method for transmitting data from a base station according to one embodiment of the present invention comprises: a step for transmitting to the relay node a signal having a first data to be delivered to a user equipment via the relay node; a step for transmitting to the user equipment a signal having a second data; and a step for receiving from the user equipment a HARQ confirmation response information regarding the first data delivered to the user equipment through the relay node, wherein the first data is retransmitted to the user equipment from the relay node when the HARQ confirmation response information is NACK, and scheduling information for transmitting the first data from the relay node to the user equipment and scheduling information for retransmitting the first data can be designated in advance by the base station. | 05-30-2013 |
20130148622 | METHOD AND DEVICE FOR RELAY NODE RETRANSMITTING BACKHAUL UPLINK TO BASE STATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention discloses a method for a relay node configuring a backhaul uplink hybrid automatic repeat and request (HARQ) process in a wireless communication system. More particularly, the present invention comprises the following steps: receiving from a base station a backhaul downlink subframe pattern and a HARQ process offset value; allocating a backhaul uplink subframes, based on the backhaul downlink subframe pattern excluding the subframe which is set to an access downlink subframe; applying the HARQ process offset value to the number of HARQ processes corresponding to the backhaul downlink subframe pattern; and configuring HARQ process identifiers to the allocated backhaul uplink subframes, wherein each of the configured HARQ process identifiers have a predetermined roundtrip time (RTT) value. | 06-13-2013 |
20130155942 | METHOD AND DEVICE FOR USER EQUIPMENT TRANSMITTING ACK/NACK SIGNALS TO RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM - The present invention discloses a method for a user equipment transmitting acknowledgement/negative-ACK (AC/NACK) signals to a relay node in a wireless communication system. More particularly, the present invention comprises the following steps: setting an uplink subframe pattern including uplink blocked subframes and uplink non-blocked subframes, and selecting an ACK/NACK reception factor for each of the uplink subframes; receiving data from the relay node through at least one downlink subframe; and repeatedly transmitting ACK/NACK signals corresponding to the data, based on the uplink subframe pattern and the ACK/NACK reception factor, wherein when the uplink subframe for receiving the ACK/NACK signal is a specific uplink blocked subframe, the ACK/NACK signals are received by the non-blocked subframes allocated to the user equipment, following the specific uplink blocked subframe. | 06-20-2013 |
20130155999 | METHOD AND APPARATUS FOR PREVENTING INTER-CELL INTERFERENCE IN A HETEROGENEOUS NETWORK SYSTEM - The present application relates to a method for a victim cell to construct a subframe alignment in a wireless communication system. More particularly, the method comprises the following steps: receiving, from an interfering cell, subframe alignment information including a first bitmap for defining a subframe pattern for the victim cell and a second bitmap for defining a hybrid automatic repeat and request (HARQ) process pattern of the victim cell; constructing a subframe alignment of the victim cell on the basis of the first bitmap and second bitmap; and performing scheduling for a terminal in the victim cell using the constructed subframe alignment. A downlink signal of the interfering cell may not be transmitted in one or more subframes designated by the subframe pattern for the victim cell, and the second bitmap has a size of 8 bits. | 06-20-2013 |
20130163461 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for transmitting/receiving channel state information (CSI). A method for a terminal for transmitting CSI according to one embodiment of the present invention includes: a first step of receiving a reference signal for channel measurement from a base station; a second step of generating sub-band (SB) CSI for each of a plurality of SBs using the received reference signal in the terminal and sequentially transmitting the generated SB CSI to a base station; and a third step of sequentially transmitting each SB CSI to a base station according to an order different from that of the sequential transmission. | 06-27-2013 |
20130176887 | METHOD OF REDUCING INTERCELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for transmitting a downlink signal through coordinated beamforming with a neighboring cell at a serving cell includes transmitting first subframe information for designating one or more subframes to the neighboring cell, transmitting first Precoding Matrix Index (PMI) restriction related information including one or more PMIs to a User Equipment (UE) of the serving cell, the PMIs forming a beam so that interference affecting the neighboring cell in the one or more subframes has a constant characteristic, receiving first Channel State Information (CSI) reporting measured in the one or more subframes based on the first PMI restriction related information from the UE of the serving cell, and transmitting a downlink signal to the UE of the serving cell based on the first CSI reporting, the neighboring cell receiving CSI reporting corresponding to the neighboring cell, measured by the UE of the neighboring cell in the one or more subframes. | 07-11-2013 |
20130176933 | METHOD OF PERFORMING RESOURCE SPECIFIC CHANNEL ESTIMATION IN HETEROGENEOUS NETWORK SYSTEM AND APPARATUS THEREOF - A method for performing resource specific channel estimation at a user equipment in a wireless communication system is disclosed. The method includes receiving one or more reference signals in a specific subframe from a serving cell, and performing channel estimation for a control region of a corresponding downlink subframe, based on the one or more reference signals. The channel estimation for the control region is performed based on one or more reference signals included in a data region of the corresponding downlink subframe. | 07-11-2013 |
20130195006 | METHOD OF TRANSMITTING CONTROL INFORMATION AND DEVICE FOR SAME - The present invention relates to a wireless communication system. In more detail, in relation to an uplink transmission method, the present invention relates to a method which includes: generating a signal for uplink transmission; transmitting the signal by using a subframe #n; if the subframe #n and a subframe #n+1 are subframes for respectively different links, not transmitting the signal in the last symbol of the subframe #n; and if the subframe #n and the subframe #n+1 are subframes for the same link, transmitting the signal by using the last symbol of the subframe #n, and to a device for same. | 08-01-2013 |
20130208692 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK FOR DOWNLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A wireless communication system and a method and apparatus for transmitting ACK/NACK for downlink transmission in a wireless communication system are disclosed. The method for transmitting ACK/NACK information for a downlink transmission in a receiver of a wireless communication system includes being configured with N physical uplink control channel (PUCCH) resources respectively having indexes 0, 1, 2, . . . , and N−1 by a higher layer, receiving the downlink transmission from a transmitter in a downlink subframe set including M (108-15-2013 | |
20130223258 | INTER-CELL INTERFERENCE COORDINATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed herein is a wireless communication system. More particularly, disclosed herein is a method and apparatus for coordinating and reducing inter-cell interference in a wireless communication system. A method of transmitting channel state information (CSI) measurement resource information by a base station includes determining first and second subframe sets, in which CSI measurement will be performed, among a plurality of downlink subframes, transmitting information indicating the first and second subframe sets to a terminal, and receiving the CSI of each of the first and second subframe sets from the terminal. A subframe belonging to the first subframe set and a subframe belonging to the second subframe set do not overlap, and some of the plurality of subframes do not belong to either of the first and second subframe sets. | 08-29-2013 |
20130223400 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL CHANNEL FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for transmitting and receiving a downlink control channel for controlling inter-cell interference in a wireless communication system. An embodiment of the present invention provides a method for transmitting a downlink control channel from a base station to a terminal, and the method may comprise: a step of determining whether a downlink subframe is of a first type or a second type; and a step in which if the downlink subframe is of the first type, the number of OFDM symbols for transmitting the downlink control channel is set to a preset value (N), and the downlink control channel is transmitted using N OFDM symbols. | 08-29-2013 |
20130225188 | METHOD AND DEVICE FOR MEASURING A DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for measuring a downlink in a wireless communication system. According to the present invention, provided is a method for properly and accurately measuring a downlink when an inter-cell interference adjustment is applied. | 08-29-2013 |
20130230013 | METHOD AND APPARATUS FOR TRANSMITTING A CONTROL CHANNEL AND A DATA CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting a control channel in a wireless communication system that supports multi-cell cooperative communication. According to the present invention, a scheme for protecting a control channel and a data channel of one cell from interference caused by another cell is provided. | 09-05-2013 |
20130235756 | METHOD AND DEVICE FOR APERIODICALLY REPORTING CHANNEL STATE INFORMATION IN WIRELESS CONNECTION SYSTEM - The present invention relates to methods and devices for aperiodically reporting channel state information (CSI). According to an embodiment of the present invention, a method for aperiodically reporting channel state information may comprise: a terminal receiving an upper layer signal from a base station, the upper layer signal containing information about at least one allocated CSI measurement group; the terminal receiving a physical downlink control channel (PDCCH) signal via a first subframe from the base station, the PDCCH signal containing a CSI request field; the terminal setting a second subframe as a CSI reference resource based on the first subframe; and determining whether at least one CSI measurement group to which a CSI reference resource is allocated is included. | 09-12-2013 |
20130235839 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink control channel. According to one embodiment of the present invention, a method in which a receiver receives a downlink control channel from a transmitter in a wireless communication system comprises: a step of assuming an overhead of a transmitted reference signal in a data region of a downlink subframe; and a step of decoding the downlink control channel transmitted by the transmitter in the data region on the basis of the assumption of the overhead of the reference signal, wherein the assumption of the overhead of the reference signal is determined on the basis of at least the number of receiving antennas of the receiver. | 09-12-2013 |
20130242853 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and device for transmitting and receiving data in a wireless communication system. Specifically, the method comprises: a step in which a relay node receives a relay physical downlink control channel (R-PDCCH) including indication information relating to at least one piece of information about a second antenna port and a second scramble ID from a base station by using information about a first antenna port and a first scramble ID; and a step in which the relay node receives a downlink data channel from the base station, wherein the downlink data channel comprises a first downlink data channel region assigned to a portion of a resource block pair to which the relay physical downlink control channel is assigned, and a second downlink data channel region assigned to the other portion of the resource block pair to which the relay physical downlink control channel is assigned, wherein the first downlink data channel region is received using the first antenna and the first scramble ID, and the second downlink data channel region is received using the indication information. | 09-19-2013 |
20130242921 | METHOD AND DEVICE FOR FEEDING BACK PRECODING MATRIX INDICATOR USING INTERPOLATION - The present invention relates to a method and a device for feeding back a channel through precoding matrix indicator (PMI) interpolation. As one embodiment of the present invention, a method for feeding back a precoding matrix indicator (PMI) in a CoMP environment comprises the steps of: allowing a terminal to perform PMI interpolation by using PMIs that are included in the PMI window; allowing the terminal to select an optimum PMI by comparing the interpolated PMIs with a channel state of a current channel; and allowing the terminal to feed back the optimum PMI to a base station. | 09-19-2013 |
20130250847 | METHOD AND DEVICE FOR A RELAY NODE TO TRANSMIT A SOUNDING REFERENCE SIGNAL TO A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a relay node (RN) to transmit a sounding reference signal (SRS) to a base station in a wireless communication system. The method for SRS transmission includes: receiving the backhaul downlink subframe setting information from the base station; allocating backhaul uplink subframes on the basis of the received backhaul downlink subframe setting information; receiving uplink subframe setting information; receiving uplink subframe setting information for SRS transmission from the base station; receiving an indicator for triggering the SRS transmission from the base station; and, if a first uplink subframe from among the uplink subframes for the SRS transmission is the backhaul uplink subframe, transmitting the SRS from the first uplink subframe to the base station; or, if the first uplink subframe is not the backhaul uplink subframe is not the backhaul uplink subframe, not transmitting the SRS to the base station; or transmitting the SRS from a second uplink subframe, which is backhaul uplink subframe from among the uplink subframes for the SRS transmission and is subsequently the closest to the first uplink subframe, to the base station. | 09-26-2013 |
20130258992 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting channel state information, wherein the method comprises the steps of: receiving, from a first eNode B, a plurality of pieces of configuration information for a periodic report of CSIs that are set according to each eNode B; and transmitting, to said first eNode B, CSIs for the downlink of the corresponding eNode Bs through subframes that are periodically set according to each piece of the configuration information, wherein the subframes that are periodically set according to the configuration information for said first eNode B are used to transmit a CSI for the downlink of said first eNode B, and at least a portion of subframes that are periodically set according to configuration information for a second eNode B is used to transmit information which indicates the relationship between the downlink of said first eNode B and the downlink of said second eNode B. | 10-03-2013 |
20130260779 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present application relates to a method for enabling a terminal to transmit channel status information in a wireless communication system. Specifically, the method for enabling the terminal to transmit the channel status information in the wireless communication system includes the steps of: receiving a reference signal from a serving cell or an adjacent cell; determining the priority of the predetermined precoding matrix index (PMI) based on the reference signal; and transmitting the PMI together with a stacking flag to the serving cell according to the priority, wherein the number of PMI to be transmitted to the serving cell is determined based on a size of a buffer commonly set in the serving cell and the terminal, and the stacking flag indicates storing the PMI into the buffer or initializing the buffer. | 10-03-2013 |
20130272158 | METHOD OF CONTROLLING UPLINK TRANSMISSION POWER AT UE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of determining uplink transmission power at a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving channel status information-reference signal (CSI-RS) settings and downlink transmission power values for a plurality of transmission points (TPs) from a higher layer, receiving CSI-RSs from the plurality of TPs, estimating path loss values corresponding to the plurality of TPs based on the received CSI-RSs, determining the uplink transmission power using the estimated path loss values, and transmitting an uplink signal to one or more of the plurality of TPs based upon the determined uplink transmission power. | 10-17-2013 |
20130272189 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for allocating a resource which enables a relay node to transmit uplink control information to a base station in a wireless communication system. Specifically, the method for allocating the resource include the steps of: generating a control information sequence for a backhaul downlink sub-frame between a relay node and a base station; setting symbols for mapping the control information sequence when a plurality of symbols are punctured at a front end or a rear end of a backhaul uplink sub-frame between the relay node and the base station; and performing the time-first-mapping for the control information sequence with respect to resource elements corresponding to the set symbols in a descending order of sub-carrier indexes. | 10-17-2013 |
20130272261 | METHOD FOR MITIGATING INTER CELL INTERFERENCE AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device therefor, wherein the method comprises the steps of: receiving a PDCCH signal that contains scheduling information from a base station on a first subframe; receiving a PDSCH signal corresponding to said PDCCH signal from said base station on a second subframe; and decoding said PDSCH signal, wherein an interval between said first subframe and said second subframe is varied. | 10-17-2013 |
20130279361 | METHOD OF REDUCING INTERCELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for processing a signal processing at a user equipment in a wireless communication system is disclosed. The method includes receiving an interference measurement subframe set from a serving cell, receiving first Channel Status Information (CSI) configuration information and second CSI configuration information from the serving cell, measuring CSI based on the first CSI configuration information in a subframe designated in the interference measurement subframe set and reporting the CSI to the serving cell, and measuring the CSI based on the second CSI configuration information in a subframe which is not designated in the interference measurement subframe set and reporting the CSI to the serving cell. | 10-24-2013 |
20130279455 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for reporting channel state information, wherein the method comprises the following steps: receiving configuration information for periodically reporting channel state information; and periodically reporting the channel state information for a each of a plurality of periods based on the configuration information, wherein the channel state information is repeated so as to have a predetermined pattern based on periods, of which a second period is longer than a first period. The second period has a first value in a single transmission point operation mode. The second period has a sum of the first value and a second value which is proportional to the number of coordinated transmission points involved in a coordinated multi-point transmission operation in a coordinated multi-point transmission operation mode. | 10-24-2013 |
20130279613 | FEEDBACK METHOD FOR VIRTUAL MIMO TRANSMISSION IN WIRELESS AD-HOC COMMUNICATION SYSTEM - A method for communicating between first multiple nodes and second multiple nodes in a wireless communication system is disclosed. The method includes the steps of performing a first local sharing procedure for a virtual MIMO (Multiple Input Multiple Output) feedback among the second multiple nodes during a first predetermined time; performing feedback of channel status information from the second multiple nodes to the first multiple nodes during a integer multiple of a second predetermined time; and performing a second local sharing procedure for the virtual MIMO feedback among the first multiple nodes during the first predetermined time. | 10-24-2013 |
20130286906 | METHOD FOR SIGNALING A SUBFRAME PATTERN FOR PREVENTING INTER-CELL INTERFERENCE FROM OCCURRING IN HETEROGENEOUS NETWORK SYSTEM AND APPARATUS FOR THE SAME - A method for setting an almost blank subframe (ABS) pattern in a base station of a wireless communication system is disclosed. The method comprises receiving an ABS bitmap pattern from a neighboring base station; setting the ABS pattern of the base station by repeating the ABS bitmap pattern within a previously set number of radio frames; receiving an offset value indicating an application start point of an updated ABS bitmap pattern and an application start of the updated ABS bitmap pattern from the neighboring base station; and setting the ABS pattern of the base station by repeating the updated ABS bitmap pattern from a start subframe of a specific radio frame indicated by the offset value. | 10-31-2013 |
20130286933 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION TO MACRO BASE STATION BY RELAY NODE IN WIRELESS COMMUNICATION SYSTEM TO WHICH CARRIER AGGREGATION IS APPLIED - A method and apparatus for transmitting channel status information (CSI) to a macro eNB (MeNB) by a relay node (RN) in a wireless communication system to which carrier aggregation is applied are disclosed. The method includes receiving a CSI reporting request corresponding to a specific secondary component carrier (CC) from the transmitter through a primary CC, establishing a reference resource for the CSI in association with one or more secondary CCs indicated by the CSI reporting request, and transmitting CSIs of the one or more secondary CCs to the transmitter through the specific secondary CC, using the established reference resource. The reference resource is set to the nearest subframe serving as a valid downlink subframe from a reception time point of the CSI reporting request. | 10-31-2013 |
20130287064 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and discloses a method and a device for transmitting/receiving a downlink reference signal in a wireless communication system. The present invention provides a way for maintaining orthogonality of a reference signal between cells in a multi-cell operation. | 10-31-2013 |
20130294282 | METHOD AND APPARATUS FOR TRANSMITTING AN UPLINK SIGNAL BY A RELAY IN A WIRELESS COMMUNCATION SYSTEM - The present invention relates to a wireless communication system, and to a method and apparatus for transceiving an uplink signal by a relay in a wireless communication system. According to the present invention, a scheme, in which the relay may correctly determine a reference resource for channel state information (CSI) calculation, and thus may perform accurate CSI transmission, may be provided. In addition, according to the present invention, a scheme, in which the relay may correctly determine timing for transmitting a sounding reference signal (SRS) based on the instruction of a base station and may perform SRS transmission, may be provided. | 11-07-2013 |
20130294332 | METHOD FOR SETTING SEARCH SPACE FOR RELAY NODE IN WIRELESS COMMUNCATION SYSTEM AND DEVICE THEREFOR - Disclosed in the present invention is a method for a relay node to receive a control signal from a base station in a wireless communication system. More particularly, the present invention comprises the steps of: receiving a downlink signal from the base station; and obtaining control information for the relay node by blind-decoding the downlink signal, wherein a search space for blind decoding is located in the data region of a subframe, and is divided into a search space for a downlink grant and a search space for an uplink grant. When the subframe corresponding to the control information for the relay node is a downlink (DL) standalone, the search area including only the search space for the downlink grant, or the search area for the uplink grant being set as an invalid search space would be desirable. | 11-07-2013 |
20130294352 | METHOD OF TRANSMITTING AND RECEIVING CHANNEL STATUS INFORMATION ON MULTI-CELL OPERATION IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication system. And, a method of transmitting and receiving channel status information on a multi-cell operation in a wireless communication system and apparatus for the same are disclosed. The present invention may include determining a report type of channel status information on multi-cell operation and transmitting/receiving the channel status information corresponding to the determined channel status information report type via uplink data channel. | 11-07-2013 |
20130295949 | METHOD AND APPARATUS FOR INTER-CELL INTERFERENCE COORDINATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for performing inter-cell interference coordination in a wireless communication system. According to the present invention, a method is provided in which, when ICIC information exists both in a time resource and a frequency resource, the determination of whether or not to apply frequency resource ICIC information is carried out on the basis of time resource ICIC information in an ICIC-related cell, and the location of a resource to which ICIC is applied is accurately determined, to thereby enable an ICIC operation to be performed in an accurate and effective manner. | 11-07-2013 |
20130301465 | METHOD AND DEVICE FOR SETTING CHANNEL STATUS INFORMATION MEASURING RESOURCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, discloses a method and a device for setting a channel status information (CSI) measuring resource in a wireless communication system. The present invention provides a way to transmit/receive the CSI more accurately and efficiently by setting a virtual reference resource for measuring the CSI. | 11-14-2013 |
20130301596 | METHOD FOR SUPPRESSING INTERFERENCE OF TERMINAL IN MULTIPLE INPUT MULTIPLE OUTPUT WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for enabling a terminal to process a signal in a wireless communication system. Specifically, the method for enabling a terminal to process a signal in the wireless communication system includes the steps of: estimating a recommended transmission beamforming vector and a prior received filtering vector; calculating an effective channel for an adjacent cell by applying the prior received filtering vector to a signal received from the adjacent cell; estimating a constraint beamforming vector for the adjacent cell on the basis of the effective channel; transmitting the information of the transmission beamforming vector and the constraint beamforming vector to the serving cell; receiving adaptive response signals of the transmission beamforming vector and the constraint beamforming vector and the constraint beamforming vector; and receiving the signal to which the transmission beamforming vector is applied, from the serving cell by applying the prior received filtered vector. | 11-14-2013 |
20130301597 | METHOD FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for allowing a terminal to receive a downlink signal from a base station in a wireless communication system. More specifically, the method comprises the steps of: receiving a first control channel which indicates the location information of a resource allocated to a second control channel; receiving the second control channel, on the basis of a control format indicator contained in the first control channel; and obtaining a downlink grant and/or an uplink grant contained in the second control channel, wherein the second control channel is allocated with the resource contained in a data region of a specific subframe. | 11-14-2013 |
20130308523 | METHOD FOR CONFIGURING A BACKHAUL LINK SUBFRAME IN A WIRELESS COMMUNICATION SYSTEM TO WHICH A CARRIER AGGREGATION SCHEME IS APPLIED AND AN APPARATUS FOR THE SAME - A method for configuring a backhaul link subframe in a wireless communication system to which a carrier aggregation scheme is applied and an apparatus for the same are disclosed. The method comprises determining one of a plurality of subframe configurations as a first subframe configuration for a primary component carrier allocated to the relay node; configuring subframe configuration candidates for one or more secondary component carriers allocated to the relay node on the basis of the determined first subframe configuration; determining a second subframe configuration for each of the one or more secondary component carriers by using the configured subframe configuration candidates; and transmitting and receiving a signal to and from the relay node in accordance with the first subframe configuration and the second subframe configuration. | 11-21-2013 |
20130315135 | METHOD AND DEVICE FOR SETTING BACKHAUL LINK SUBFRAME IN WIRELESS COMMUNICATION SYSTEM HAVING CARRIER AGGREGATION TECHNIQUE APPLIED THERETO - Disclosed in the present invention is a method for a base station to set a backhaul link subframe for a relay node in a wireless communication system, to which a carrier aggregation technique is applied. More particularly, the present invention comprises the steps of: determining one of the plurality of subframe settings as a first subframe setting for a main component carrier allocated to the relay node; composing subframe setting candidates for one or more subcomponent carriers allocated to the relay node, one the basis of the determined first subframe setting; and determining a second subframe setting for each of the one or more subcomponent carriers, using the composed subframe setting candidates, wherein a subframe aggregation according to the first subframe setting and subframe aggregations according to each of the subframe setting candidates do not overlap when downlink subframes and uplink subframes of the different component carriers are identical, and a downlink subframe aggregation according to the second subframe setting is included in a downlink subframe aggregation according to the first subframe setting. | 11-28-2013 |
20130315189 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATUS INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for transmitting channel status information. According to the present invention, a method for enabling a terminal to transmit channel status information (CSI) with respect to cooperative transmission in the wireless communication system, includes the steps of: determining a first precoding matrix indicator (PMI) for a first cell and a second PMI for a second cell; and transmitting the CSI including the first PMI and the second PMI, wherein the CSI is determined on the basis of a coupled precoding matrix in which the first precoding matrix corresponding to the first PMI is coupled with the second precoding matrix corresponding to the second PMI, and the coupled precoding matrix can be determined by a first coupling type or a second coupling type. | 11-28-2013 |
20130315192 | METHOD FOR DECIDING RESOURCE-SPECIFIC TRANSMISSION MODE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - A method for a user equipment transmitting/receiving signals to and from a base station in a wireless communication system is disclosed in the present invention, which is specifically characterized by comprising the following steps: receiving form the base station information related to a plurality of subframe sets; receiving from the base station information related to transmission modes which correspond to each of the plurality of subframe sets; and transmitting/receiving the signals to and from the base station based on the transmission mode that corresponds to a specific subframe set in a subframe that belongs to the specific subframe set from the plurality of subframe sets. | 11-28-2013 |
20130322245 | METHOD FOR UPLOADING DATA BY STATION, METHOD FOR DOWNLOADING DATA BY STATION AND METHOD FOR DOWNLOADING BY TRANSPORTER - The present invention provides methods and devices for transporting data from a station (hereinafter source station) to another station (hereinafter target station) by using a transporter. According to the present invention, route information of the transporter is provided to the source station, and the source station determines whether to use the transporter for transporting the data from the source station to the target station. | 12-05-2013 |
20130322324 | METHOD FOR SETTING SEARCH SPACE FOR HANDOVER OF RELAY NODE IN WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR - Disclosed in the present invention is a method for a relay to execute a random access procedure in a wireless communication system. More particularly, the present invention comprises the steps of: transmitting a random access preamble to a target cell; receiving a downlink signal from the target cell; obtaining a relay node-physical downlink control channel (R-PDCCH) by blind decoding the downlink signal; and receiving a random access response message on the basis of the R-PDCCH, wherein a search space for the blind decoding is located in a data region of a subframe, and information on the search space is delivered from the target cell to a serving cell of the relay node, and then signaled to the relay node. | 12-05-2013 |
20130324109 | METHOD FOR REPORTING CHANNEL STATE INFORMATION IN A MULTI-CELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method for a terminal to transmit channel state information in a multi-cell cooperative wireless communication system. Particularly, the method comprises the steps of: determining a precoding matrix index (PMI) for a serving cell from among a plurality of PMIs; structuring PMI information for a cooperative cell based on the PMI for the serving cell; and transmitting the PMI for the serving cell and the PMI information for the cooperative cell to the serving cell, wherein a plurality of the PMIs are divided into a plurality of PMI subsets, PMIs included by the respective PMI subsets are vertically placed, and the PMI information for the cooperative cell comprises a first indicator indicating at least one of a plurality of the PMI subsets to a PMI subset for the cooperative cell, and a second indicator indicating at least one of the PMIs in the indicated PMI subset to the PMI for the cooperative cell. | 12-05-2013 |
20130329612 | METHOD AND DEVICE FOR CONTROLLING INTERFERENCE BETWEEN CELLS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device for a serving cell to control the interference between cells in a time division duplex (TDD) wireless communication system, the method comprising the steps of: transmitting to a neighbor cell subframe allocation information for indicating one or more uplink (UL) subframes; and limiting UL transmission activity in the one or more of the UL subframes. | 12-12-2013 |
20130329686 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device therefor, wherein a method for receiving a downlink control channel in a communication device having a plurality of cells in a wireless communication system comprises the steps of: receiving a subframe containing a plurality of search space resources which are preset to transmit a plurality of downlink control channel candidates, wherein each search space resource corresponds to each cell; and monitoring said plurality of the control channel candidates from at least a portion of said plurality of the search space resources, for said downlink control channel, wherein among said plurality of the cells, if there are one or more specific cells in which downlink transmission is limited at said subframe, search space resources corresponding to said one or more specific cells are used to transmit downlink control channel candidates or downlink shared channels of other cells. | 12-12-2013 |
20130329711 | METHOD AND DEVICE FOR COMMUNICATION BETWEEN TERMINALS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for communication between terminals in a wireless communication system. According to the present invention, a resource configuration method, a channel configuration method, a transmission power control method, etc. for communication between terminals can be provided. | 12-12-2013 |
20130336279 | METHOD FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR THE SAME - A method for receiving a downlink signal in a user equipment of a wireless communication system from a base station comprises the steps of receiving control information from either a downlink control channel or a legacy downlink control channel in accordance with a previously set condition; and receiving a downlink shared channel or a legacy downlink shared channel on the basis of the control information, wherein the downlink control channel is received through a data region of a subframe, and the legacy downlink control channel is received through a control region of the subframe, the control information of the downlink control channel includes allocation information of the downlink shared channel, and the control information of the legacy downlink control channel includes allocation information of the downlink shared channel or the legacy downlink shared channel. | 12-19-2013 |
20130336299 | RETRANSMISSION METHOD FOR DYNAMIC SUBFRAME SETTING IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - Disclosed is a method for allowing a terminal to transmit and receive signals to and/from a base station in a wireless communication system using a time division multiplexing method. Specifically, the method comprises the steps of: receiving a request signal for resetting into a second uplink/downlink setting while transmitting and receiving a signal according to a first uplink/downlink setting; terminating an uplink retransmission process associated with a specific uplink subframe when the use of the specific uplink subframe is changed into a downlink subframe according to the second uplink/downlink setting; and applying the second uplink/downlink setting at a specific time point to transmit and receive signals. | 12-19-2013 |
20130336302 | DYNAMIC SUBFRAME SETTING METHOD FOR WIRELESS COMMUNICATION SYSTEM, AND DEVICE FOR SAME - The present application discloses a method for a terminal to transmit/receive signals to/from a base station in a wireless communication system. Specifically, the method comprises a first step in which an uplink signal is transmitted from a first subframe and a downlink signal is received from a second subframe, and a second step in which a downlink signal is received from the first subframe and the second subframe if the first subframe has changed so as to be used for the reception of a downlink signal; and the method is characterized in that in the first step a protection space is located between the first subframe and the second subframe, in the second step the protection space is located at the front end of the first subframe, and the first subframe and the second subframes are consecutive. | 12-19-2013 |
20130343322 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - The present invention relates to a method for a receiving terminal to transmit uplink control information to a transmitting terminal in a wireless communication system. In more detail, the method for transmitting the uplink control information includes: mapping the uplink control information into at least one available symbol included in each of a first slot and a second slot of a specific subframe; applying a first orthogonal sequence corresponding to the first slot to the uplink control information mapped into the first slot and a second orthogonal sequence corresponding to the second slot to the uplink control information mapped into the second slot; and transmitting the uplink control information having the orthogonal sequence applied to the transmitting terminal. The first orthogonal sequence corresponds to the number of available symbols in the first slot and the second orthogonal sequence corresponds to the number of available symbols in the second slot. | 12-26-2013 |
20130343340 | METHOD FOR RECEIVING DOWNLINK SIGNAL AND METHOD FOR TRANSMITTING SAME, AND DEVICE FOR RECEIVING SAME AND DEVICE FOR TRANSMITTING SAME - The present invention relates to a method for a transmission device to transmit data and a reference signal for demodulation for the data, to a reception device. The transmission device of the present invention appropriately configures the reference signal for demodulation of the data being transmitted to the reception device by the transmission device, and transmits the reference signal to the reception device with the data. According to embodiments of the present invention, the demodulation performance for the data transmitted from the transmission device to the reception device is enhanced. | 12-26-2013 |
20140003250 | METHOD FOR COMMUNICATION CONSIDERING INTERFERENCE BETWEEN CELLS IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR | 01-02-2014 |
20140003327 | METHOD AND APPARATUS FOR HANDING OVER MOBILE CELL | 01-02-2014 |
20140003387 | METHOD AND DEVICE FOR TERMINAL TO TRANSMIT/RECEIVE SIGNAL IN WIRELESS COMMUNICATION SYSTEM HAVING CARRIER AGGREGATION TECHNIQUE APPLIED THERETO | 01-02-2014 |
20140011468 | METHOD FOR RECEIVING RADIO SIGNAL AND DEVICE THEREFOR - A method for receiving a radio signal by a receiver including a 2-dimensional antenna array which consists of a plurality of antenna elements in a wireless communication system includes: dividing the plurality of antenna elements into a plurality of groups; determining a group-specific reception beam for each of the plurality of groups; applying the group-specific reception beam to a channel corresponding to each of the plurality of groups to acquire virtual channels respectively corresponding to the plurality of groups; and estimating channels respectively corresponding to the plurality of groups based on reference signals received through the virtual channels. | 01-09-2014 |
20140016497 | CSI-RS BASED CHANNEL ESTIMATING METHOD IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - The present invention relates to a user equipment to perform an estimation operation in a wireless communication system. In more detail, the method includes: receiving configuration information of CSI-RSs (channel status information-reference signals) defined by a plurality of antenna ports from a base station; combining CSI-RSs defined by specific antenna ports among the plurality of antenna ports; and performing the measurement based on the combined CSI-RSs. Here, performing the measurement comprises measuring at least one of a RSRP (reference signal received power), a RSRQ (reference signal received quality) and a pathloss based on the combined CSI-RSs. | 01-16-2014 |
20140016534 | METHOD AND DEVICE FOR RANDCOM ACCESS IN MOBILE COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to execute a random access in a mobile communication system, and comprises the steps of: transmitting a random access preamble using a resource determined according to a random access setting for the terminal; and receiving a random access response including uplink approval information from a base station as a response to the preamble transmission, wherein the random access setting is determined by a group corresponding to the terminal from a first random access setting for a first terminal group or a second random access setting for a second terminal group, and a resource reserved for the second terminal group according to the second random access setting is used for transmission of the random access preamble or transmission of uplink data. | 01-16-2014 |
20140016541 | BACKHAUL LINK SUBFRAME STRUCTURE IN MOBILE COMMUNICATION SYSTEM AND METHOD FOR TRANSMITTING INFORMATION THEREOF - The present invention relates to a method for a first node to transmit a signal to a second node in a mobile communication system, and comprises the steps of: determining a first slot setting and a second slot setting according to propagation delay value between the first node and the second node; and transmitting the signal through a subframe having a structure determined by the first slot setting and the second slot setting, wherein the first slot setting and the second slot setting each includes a initiation symbol and a termination symbol determined in consideration of the propagation delay value. | 01-16-2014 |
20140022982 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS A RELAY NODE - A method and apparatus for transmitting and receiving data in a wireless communication system that supports a relay node are disclosed, wherein an open-loop mode is provided between the relay node and a user equipment. A method for transmitting data from a relay node to a user equipment comprises the steps of receiving information on a first condition related to transmission of the data from a base station; receiving first data including a plurality of sequential codes from the base station; and transmitting second data corresponding a part of the first data to the user equipment in accordance with the first condition if decoding of the first code of the plurality of codes is successfully performed. | 01-23-2014 |
20140029559 | METHOD FOR TERMINAL TO RECEIVE DOWNLINK SIGNAL FROM BASE STATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed in the present invention is a method for a terminal to receive downlink data from a base station in a wireless communication system. More particularly, the present invention comprises the steps of: receiving downlink control information from the base station in a first subframe; confirming a specific identifier included in the downlink control information; and when the specific identifier is more than or equal to a predetermined value, receiving downlink data in a second subframe, on the basis of the downlink control information. | 01-30-2014 |
20140029561 | METHOD AND DEVICE FOR TRANSMITTING A SIGNAL IN A MOBILE COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method of a base station to transmit a signal in a wireless communication system. The method includes: transmitting Physical Downlink Control Channel (PDCCH), which includes scheduling information on a resource area of an unlicensed band over a licensed band; and transmitting a sequence, which includes the identifier of a terminal having the resource area allocated, over the unlicensed band. The timing at which the sequence is transmitted may be set prior to a resource area scheduled by the PDCCH. | 01-30-2014 |
20140029573 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a wireless communication system, more specifically to a method for transmitting control information and a device therefor. The wireless communication system can support carrier aggregation. The present invention relates to a method for transmitting information from a terminal to a base station in a wireless communication system, which includes a step for receiving first information for cross carrier scheduling through at least one primary cell among serving cells formed in a terminal from the base station, and a step for transmitting second information about a secondary cell related to at least one first information among serving cells to the base station through an uplink resource of the primary cell. | 01-30-2014 |
20140036740 | METHOD AND DEVICE FOR SETTING BACKHAUL LINK SUBFRAME IN WIRELESS COMMUNICATION SYSTEM HAVING CARRIER AGGREGATION TECHNIQUE APPLIED THERETO - Disclosed in the present invention is a method for a base station to set a backhaul link subframe for a relay node in a wireless communication system, to which a carrier aggregation technique is applied. More particularly, the present invention comprises the steps of: determining one of the plurality of subframe settings as a first subframe setting for a main component carrier allocated to the relay node; composing subframe setting candidates for one or more subcomponent carriers allocated to the relay node, one the basis of the determined first subframe setting; and determining a second subframe setting for each of the one or more subcomponent carriers, using the composed subframe setting candidates, wherein a subframe aggregation according to the first subframe setting and subframe aggregations according to each of the subframe setting candidates do not overlap when downlink subframes and uplink subframes of the different component carriers are identical, and a downlink subframe aggregation according to the second subframe setting is included in a downlink subframe aggregation according to the first subframe setting. | 02-06-2014 |
20140036853 | SIGNAL TRANSMISSION METHOD AND DEVICE IN A WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for transmitting signals over an unlicensed band phase of a base station in a wireless communication system, which comprises the steps of: transmitting a physical down-link control channel (PDCCH) from a licensed band; and transmitting a physical down-link shared channel (PDSCH) over a time interval of the unlicensed band corresponding to the sub-frame transmitted by the PDCCH, wherein a reservation signal can be transmitted to a pre-set point from the point the unlicensed band is available to the base station, if the base station performs wave transmission sensing for the unlicensed band for transmission of the PDSCH, and the pre-set point is earlier than the point at which the unlicensed becomes available from the transmission sensing results. | 02-06-2014 |
20140036889 | METHOD AND DEVICE FOR TRANSMITTING RECEPTION ACKNOWLEDGEMENT INFORMATION IN A MOBILE COMMUNICATION SYSTEM - The present invention and embodiments thereof relate to a method for transmitting a signal of a base station in a wireless communication system using a carrier merge. The method includes transmitting to a terminal a Physical Downlink Shared CHannel (PDSCH) on a downlink secondary cell and a Physical Downlink Shared CHannel (PDSCH) indicating the PDSCH on a downlink primary cell; and receiving a reception acknowledgement response on the PDSCH, which is transmitted from the terminal to an uplink primary cell. The PDSCH is transmitted when the downlink secondary cell becomes available, and the transmission timing of the reception acknowledgement response is determined by one of the PDSCH transmission timing or the PDCCH transmission timing. | 02-06-2014 |
20140044084 | METHOD FOR ENABLING TERMINAL TO TRANSMIT ACK/NACK RESPONSE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present application relates to a method for enabling a terminal to transmit an uplink ACK/NACK (Acknowledgement/negative ACK) response to a base station in a time-division multiplexing wireless communication system. Specifically, the method includes the steps of: receiving a setting for an uplink-downlink subframe from the base station; receiving downlink control information and downlink data information scheduled through the downlink control information, from the base station based on the setting for the uplink-downlink subframe; and transmitting an ACK/NACK response for the downlink data information to the base station, wherein the subframe to which the ACK/NACK response is transmitted is determined according to whether an ending symbol of the downlink control information is after a particular symbol of the sub-frame for receiving the downlink control information. | 02-13-2014 |
20140050191 | METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE, AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION - The present invention provides a method and a device for transmitting/receiving a control channel in a downlink subframe, which divides into a control area and a data area. The present invention enables the downlink control channel transmitted from the data area of a specific carrier wave to be configured to carry scheduling information on another carrier wave. | 02-20-2014 |
20140050192 | METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE, AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION - The present invention provides a method and a device for transmitting/receiving a control channel in a downlink subframe, which divides into a control area and a data area. In the present invention, a first downlink control channel is transmitted in the control area of the downlink subframe, and/or a second downlink control channel is transmitted in the data area of the downlink subframe. The first downlink control channel carries downlink control information having a predetermined format, and the second downlink control channel carries downlink control information having a format corresponding to a transmission mode of a user device. | 02-20-2014 |
20140064170 | METHOD FOR CONTROLLING POWER IN A WIRELESS COMMUNICATION SYSTEM ADOPTING A CARRIER AGGREGATION TECHNIQUE, AND APPARATUS FOR SAME - The present application discloses a method in which a terminal transceives a signal to/from a base station in a wireless communication system adopting a carrier aggregation technique. More particularly, the method comprises: a step of receiving a wake-up message for a sub-component carrier which is in an idle state from said base station via a main component carrier; a step of starting to monitor said sub-component carrier after receiving said wake-up message; and a step of receiving a downlink signal from said base station or transmitting an uplink signal to said base station via said sub-component carrier. | 03-06-2014 |
20140064203 | METHOD AND DEVICE FOR COMMUNICATING DEVICE-TO-DEVICE - The present invention relates to a wireless communication system, and more specifically, to a method and a device for communicating device-to-device. The method for a first device to transmit a signal to a second device according to one embodiment of the present invention enables the first device to request to a base station a resource allocation for transmitting the signal to the second device, receive from the base station scheduling information for transmitting the signal to the second device, and the signal can be transmitted from the first device to the second device on the basis of the scheduling information, wherein the scheduling information includes information on an uplink resource for transmitting the signal from the first device to the second device. | 03-06-2014 |
20140064204 | METHOD FOR RECEIVING DOWNLINK SIGNAL AND METHOD FOR TRANSMITTING SAME, USER EQUIPMENT, AND BASE STATION - Presented is a plan for utilizing resources not being used in a subframe consisting of relay transmission, and being thrown away thereafter. The present invention enables efficient utilization of the resources by reducing the waste of the resources in a wireless communication system supporting a relay. | 03-06-2014 |
20140064235 | METHOD FOR TRANSMITTING/RECEIVING DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed in the present invention is a method for a terminal to receive downlink control information from a base station in a wireless communication system. More particularly, the present invention comprises the steps of receiving control information in a first area of a specific subframe on the basis of a first reference signal, receiving control information in a second area of the specific subframe on the basis of a second reference signal, wherein the first reference signal and the second reference signal are applied to a same precoding. | 03-06-2014 |
20140064237 | METHOD AND DEVICE FOR TERMINAL TO EXECUTE UPLINK HARQ OPERATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed in the present invention is a method for a terminal to receive an acknowledgement/negative-ACK (ACK/NACK) from a base station in a wireless communication system. More specifically, the method comprises the steps of receiving from the base station, through a first carrier wave, scheduling information on uplink data to be transmitted through a second carrier wave, transmitting the uplink data to the base station through the second carrier wave, and receiving an ACK/NACK signal for the uplink data from the base station, in one specific subframe from the first carrier wave or the second carrier wave. | 03-06-2014 |
20140071929 | METHOD FOR TRANSMITTING/RECEIVING DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed in the present invention is a method for a terminal to receive a downlink signal from a base station in a wireless communication system. More particularly, the present invention comprises the steps of: receiving downlink control information from the base station in a data region of a first subframe; and receiving downlink data in a data region of a second subframe, on the basis of the downlink control information, wherein the second subframe is a subframe available after a preset number of subframes from the first subframe. | 03-13-2014 |
20140071931 | METHOD AND DEVICE FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more particularly, to a method and a device for transmitting control information. The wireless communication system supports carrier aggregation (CA). One aspect of the present invention relates to a method for a base station to receive information from a terminal in a wireless communication system, and comprises the steps of: dividing the entire bandwidth used by one or more serving cells configured in the base station and the terminal, into predetermined frequency units; carrying out a carrier sensing operation for each of the plurality of bandwidths divided in the predetermined frequency units; and when the result of the carrier sensing operation for a first bandwidth from the plurality of divided bandwidths is maintained idle for a predetermined time or longer, transmitting first information to the terminal using the first bandwidth; and receiving from the terminal, second information on a second cell (SCell) related to the first information from the one or more serving cells. | 03-13-2014 |
20140079012 | METHOD FOR TRANSMITTING SIGNAL USING PLURALITY OF ANTENNA PORTS AND TRANSMISSION END APPARATUS FOR SAME - The present invention relates to wireless communication, and more particularly, to a method for transmitting a signal using a plurality of antenna ports and a transmission end apparatus for same. According to a method for a transmission end transmitting the signal in a multi-input multi-output (MIMO) wireless communication system of the present invention, a step of transmitting instruction information on a first channel transmission method to a reception end, and a step of transmitting the first channel to the reception end using a resource region are comprised, wherein the first channel is either an advanced-physical downlink control channel (A-PDCCH) or a relay-physical downlink control channel (R-PDCCH), the first channel is not transmitted when at least a portion of the resource region overlaps with a resource region used for transmitting a second channel, and wherein the second channel can be periodically transmitted using a predetermined portion of the resource region. | 03-20-2014 |
20140079015 | MULTIPLEXING METHOD FOR SIGNALS RELATED TO A PLURALITY OF TERMINALS IN A WIRELESS COMMUNICATION SYSTEM APPLYING CARRIER AGGREGATION TECHNIQUES AND APPARATUS THEREFOR - The present description discloses a method for transmitting an uplink signal through a non-licensed band from a terminal in a wireless communication system by applying carrier aggregation techniques. More specifically, the method is characterized by comprising the steps of: receiving an uplink scheduling grant from a base station; determining the availability of a non-licensed band; transmitting a signal for reserving resources if a non-licensed band is available; and transmitting an uplink signal to the base station via the non-licensed band on the basis of the uplink scheduling grant. | 03-20-2014 |
20140079018 | METHOD AND DEVICE FOR TRANSMITTING DATA IN A MULTI ANTENNA WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a transmitter to transmitter data to a receiver in a multi wireless communication system. In more detail, the method include: mapping a transmission resource, which is allocated for the data, into the data the in order of a space domain, a frequency domain, and a time domain; and transmitting the data to the receiver by using the mapped transmission resource. The transmission resource includes a plurality of space resources. Each of the plurality of space resources includes a plurality of resource allocation units, which are defined by a specific time resource and a specific frequency resource. The mapping of the transmission resource includes mapping the plurality of complex symbols into the remaining space resources in the order of a frequency resource and a time resource if there is no resource allocation unit allocated to a specific space resource. | 03-20-2014 |
20140080477 | METHOD FOR TERMINAL TRANSMITTING/RECEIVING SIGNAL IN BASE STATION COORDINATION WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - In the present invention, a method for a terminal transmitting/receiving a signal with a plurality of transmission points in a wireless communication system is disclosed. More particularly, the method comprises the steps of: receiving carrier aggregation (CA) setting information and a signal related to a fake-carrier aggregation (CA) for applying the CA settings from a main transmission point from the transmission points; and transmitting the signal through each of the plurality of transmission points and a single carrier, wherein the information included in the fake-CA signal includes information related to whether to activate an uplink and a downlink of each of the plurality of transmission points. | 03-20-2014 |
20140092792 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a wireless communication system. In particular, the present invention relates to a method for receiving a downlink control channel in a wireless communication system, and a device therefore, more particularly, to the method and a device therefore, the method comprising the steps of: receiving an upper layer signal including a plurality of frequency resource sets; receiving a subframe carrying a plurality of downlink control channel candidates; and monitoring the plurality of control channel candidates in one specific frequency resource set from the plurality of frequency resource sets, for the downlink control channel, wherein the one specific frequency resource set is determined according to the type or the characteristic of the subframe. | 04-03-2014 |
20140092921 | METHOD FOR TERMINAL TO TRANSMIT/RECEIVE SIGNAL TO/FROM BASE STATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a method for a terminal to transmit/receive a signal to/from a base station in a specific subframe in a wireless communication system. More particularly, the present invention comprises the steps of: receiving setting information of the specific subframe from the base station; and receiving a downlink signal from the base station or transmitting an uplink signal to the base station, in the specific subframe, wherein the specific subframe has a first segment for receiving the downlink signal in the front end thereof, a second segment for transmitting the uplink signal in the rear end thereof, and when the specific subframe is set for the purpose of downlink signal reception, the setting information defines the size of the first segment of the specific subframe, and when the specific subframe is set for the purpose of uplink signal transmission, the setting information defines the size of the second segment of the specific subframe. | 04-03-2014 |
20140098779 | METHOD FOR A TERMINAL TO RECEIVE A DOWNLINK SIGNAL IN A COOPERATIVE BASE STATION WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - The present invention relates to a method for a terminal to receive a downlink signal from a plurality of base stations in a wireless communication system. More particularly, the method comprises the steps of: receiving downlink scheduling information from a first base station; and using the downlink scheduling information in order to receive downlink data signals from the first base station and at least one second base station. the downlink data signals received from each of the first base station and the at least one second base station are received through the same frequency band. | 04-10-2014 |
20140098780 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION AND USER EQUIPMENT, AND METHOD FOR RECEIVING UPLINK CONTROL INFORMATION AND BASE STATION - The present invention provides a method and apparatus for uplink transmission/reception of at least one slot in a sub-frame comprising two slots. A base station transmits information which controls the slot performing the uplink transmission among the two slots, to user equipment, and the user equipment performs uplink transmission from the slot directed by the information. When the user equipment transmits ACK/NACK information, the ACK/NACK information is transmitted from the first slot of the user equipment if the CCE associated with the first slot is the CCE included in the PDCCH of the user equipment, and the ACK/NACK information is transmitted from the second slot if the CCE is the CCE associated with the second slot. | 04-10-2014 |
20140105155 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION, USER EQUIPMENT, METHOD FOR RECEIVING UPLINK CONTROL INFORMATION, AND BASE STATION - In the present invention, a user equipment-specific offset information for indicating first physical uplink control channel (PUCCH) resources, which can be used for transmitting ACK/NACK related to a physical downlink control channel (PDCCH) that is transmitted from a data region of a downlink subframe, is provided to a user equipment by means of a base station. The user equipment, which receives the PDCCH from the data region of the downlink subframe, decides the PUCCH resource, based on offset information and an index of the resource that is included in the PDCCH, and transmits ACK/NACK information that corresponds to the PDCCH to the base station using the PUCCH resource. | 04-17-2014 |
20140105191 | METHOD OF TRANSMITTING CONTROL INFORMATION AND DEVICE FOR SAME - The present invention relates to a wireless communication system. In more detail, a method for performing HARQ (hybrid automatic repeat request) retransmission by a communication device in a wireless communication system, the method comprising: initially transmitting a data block to a Base Station (BS); attempting PDCCH (physical downlink control channel detection) in a predetermined time interval including a plurality of subframes after transmission of an uplink channel signal; and retransmitting the data block when a PDCCH signal indicating retransmission of the data block is detected in the predetermined time interval, wherein reception of a PHICH (physical hybrid ARQ indicator channel) corresponding to initial transmission of the data block is skipped. | 04-17-2014 |
20140112216 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - The present invention pertains to a wireless communication system, and more particularly, to a method for transmitting an uplink (UL) signal in a time division duplex (TDD) wireless communication system and an apparatus therefor, and the method comprises the following steps: receiving information limiting UL transmission activity from a serving cell; and transmitting a UL subframe in consideration of the information, wherein signal transmission of specific time-frequency resources corresponding to the information in the UL subframe is limited. | 04-24-2014 |
20140112263 | METHOD FOR SETTING DYNAMIC SUBFRAME IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed in the present invention is a method for a terminal to transmit/receive a signal from a base station in a wireless communication system. More particularly, the present invention comprises the steps of: receiving through a physical control channel for receiving from the base station an indicator for changing a specific subframe set for one of the uses from a downlink resource and an uplink resource to another one of the uses; and according to the indicator, transmitting a signal to the base station from the specific subframe, or receiving a signal from the base station. | 04-24-2014 |
20140112289 | METHOD AND APPARATUS FOR TRANSMITTING A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for transmitting a signal to an unlicensed band of a base station in a wireless communication system. The method comprises the steps of: transmitting at least one of a preamble and a reservation signal, if it is determined through carrier sensing that the unlicensed band is available; and transmitting a PDSCH on the unlicensed band immediately after the transmission of at least one of the preamble and the reservation signal. the preamble enables a terminal to acquire reception synchronization for at least one of the reservation signal and the PDSCH. | 04-24-2014 |
20140112312 | METHOD FOR TRANSMITTING SIGNAL USING PLURALITY OF CODEWORDS IN WIRELESS COMMUNICATION SYSTEM AND TRANSMISSION END FOR SAME - A method for transmitting a signal using a plurality of codewords in a wireless communication system and a transmission end for same are disclosed. The method for the transmission end transmitting the signal using the plurality of codewords, according to the present invention, comprises the following steps: mapping a first codeword on at least one layer from a first layer group and mapping a second codeword on at least one layer from a second layer group, when transmitting a rank of at least five; and transmitting the codewords which are mapped on the first and second layer groups, wherein each of the first layer group and the second layer group can include four layers. | 04-24-2014 |
20140119275 | METHOD FOR TRANSMITTING SIGNAL USING PLURALITY OF ANTENNA PORTS AND TRANSMISSION END APPARATUS FOR SAME - A method for transmitting a signal by using a plurality of antenna ports and a transmission end apparatus for same are disclosed. A method for transmitting the signal using the plurality of antenna ports, according to the present invention, comprises the following steps: transmitting a control channel to a reception end through a first antenna using a first resource domain; and transmitting a data channel to the reception end through the plurality of antenna ports including first antenna port using a second resource domain, wherein the second resource domain and the first resource domain have identical time domains but different frequency domains, and wherein from the time and frequency domains that belong to the first resource domain, the data channel is not transmitted through at least one antenna port from the antenna ports excluding the first antenna port. | 05-01-2014 |
20140126512 | METHOD AND APPARATUS FOR TRANSCEIVING A DOWNLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving a downlink hybrid automatic repeat (HARQ). According to one embodiment of the present invention, a method for setting an HARQ process by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, limited-resource information indicating a resource the use of which for downlink transmission to the terminal is limited; determining an HARQ process to be activated on the basis of the limited-source information; and performing an HARQ operation for the downlink transmission by means of the HARQ process to be activated. | 05-08-2014 |
20140133336 | CHANNEL STATE INFORMATION TRANSMITTING METHOD AND USER EQUIPMENT, AND CHANNEL STATE INFORMATION RECEIVING METHOD AND BASE STATION - One embodiment of the present invention discloses a method for allowing user equipment (UE), which can receive channel state information reference signals from a plurality of antenna ports, to transmit channel state information to at least one base station that controls the plurality of antenna ports. The method comprises the following steps: receiving power information of each of the plurality of antenna ports from the at least one base station; calculating channel state information on the at least one base station on the basis of the received power information and channel state information reference signals received from the plurality of antenna ports; and transmitting the calculated channel state information to the at least one base station. | 05-15-2014 |
20140133425 | METHOD AND APPARATUS FOR SIGNAL TRANSCEIVING IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention is a method for receiving a signal from a plurality of transmission points in a wireless communication system, the method for receiving a signal comprising the steps of: blind decoding a first search space of a subframe received from a first transmission point; and blind decoding a second search space of a subframe received from a second transmission point, wherein the combination of the first search space and the second search space is equivalent to a search space that results when a signal is received from only one transmission point from among the plurality of transmission points. | 05-15-2014 |
20140133427 | METHOD FOR TRANSMITTING OR RECEIVING PDCCH AND USER EQUIPMENT OR BASE STATION FOR THE METHOD - A method for receiving a physical downlink control channel (PDCCH) at a downlink subframe through a user equipment (UE) in a wireless communication system comprises the step of detecting the PDCCH by performing blind decoding for a search space including a plurality of PDCCH candidates included in the downlink subframe, wherein the blind decoding is performed in accordance with order of priority given to each of a plurality of sub-search spaces constituting the search space. | 05-15-2014 |
20140140273 | METHOD AND APPARATUS FOR TRANSCEIVING AN UPLINK HARQ IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transceiving an uplink hybrid automatic repeat request (HARQ). According to one embodiment of the present invention, a method for performing a HARQ operation in a terminal of a wireless communication system comprises the steps of: receiving, in a subframe n, an uplink grant message for first uplink data from a base station; determining a first HARQ process from among a plurality of HARQ processes associated with the subframe n; and transmitting, in a subframe n+k, the first uplink data to the base station through the first HARQ process. | 05-22-2014 |
20140140315 | METHOD FOR ADJUSTING UPLINK TRANSMISSION TIMING IN BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - In the present invention, a method for transmitting an uplink signal to a plurality of base stations at a user equipment in a wireless communication system is disclosed. More particularly, the method comprises the steps of receiving, from a serving base station, uplink timing information corresponding to each of the plurality of base stations; and transmitting the uplink signal to each of the plurality of base stations in a unit of subframe according to the uplink timing information, wherein, if a transmission timing of a first subframe to a first base station of the plurality of base stations is overlapped with a transmission timing of a second subframe to a second base station that follows the first subframe, at least one symbol of the first subframe overlapping with the second subframe is not transmitted. | 05-22-2014 |
20140140337 | METHOD FOR ACQUIRING TIME SYNCHRONIZATION IN A HETEROGENEOUS NETWORK AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for acquiring time synchronization in a wireless communication system, and to an apparatus for the method, wherein the method comprises the steps of: obtaining information on a discontinuous transmission pattern of a synchronous channel; attempting detection of a synchronous channel of a base station; and, if said detection fails, continuously attempting detection of the synchronous channel of the base station during a predetermined time period. If the base station is of a first type, said predetermined time period is set to be the same as or longer than the time period in which the synchronous channel is continuously not transmitted in said discontinuous transmission pattern. If the base station is of a second type, said predetermined time period is set to be the same as or longer than the time period in which the synchronous channel is continuously transmitted in said discontinuous transmission pattern. | 05-22-2014 |
20140146768 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention pertains to a wireless communication system, and more particularly, to a method of receiving a downlink (DL) control channel in a wireless communication system and an apparatus therefor, and the method comprises the following steps: receiving a radio resource control (RRC) message including resource block (RB) allocation information; receiving a subframe having a plurality of physical RBs; and monitoring a plurality of downlink control channel candidates in a physical RB set corresponding to the RB allocation information from the plurality of physical RBs to detect a downlink control channel allocated to a communication device, wherein the plurality of downlink control channel candidates do not continuously exist in a virtual RB set corresponding to the physical RB set. | 05-29-2014 |
20140153427 | METHOD AND APPARATUS FOR MONITORING A WIRELESS LINK IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly to a method and apparatus for monitoring a wireless link. A method for monitoring a wireless link by a terminal in a wireless communication system according to one embodiment of the present invention comprises the steps of: receiving a precoded control channel; and estimating the quality of the wireless link for the received precoded control channel, wherein the quality of the wireless link can be estimated on the basis of an assumption by the terminal regarding the precoding applied to the precoded control channel. | 06-05-2014 |
20140161084 | DOWNLINK SIGNAL RECEIVING METHOD AND USER EQUIPMENT, AND DOWNLINK SIGNAL TRANSMITTING METHOD AND BASE STATION - According to the present invention, one or more PDCCH-SFs are set from among subframes in a predetermined duration so as to force user equipment (UE) to perform a PDCCH blind decoding (BD). Information indicating said set PDCCH-SF is provided to the UE from a base station (BS). The UE performs the PDCCH BD only in the PDCCH-SF which is set to the UE itself, and not to all subframes, and performs HARQ process(es) according to the PDCCH BD. The present invention exhibits the advantages of reducing the number of BDs which the UE has to perform and of reducing the implementation complexity of the UE. | 06-12-2014 |
20140161085 | METHOD FOR TRANSMITTING AND RECEIVING RESOURCE ALLOCATION INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed are a method for transmitting and receiving resource allocation information in a wireless communication system and an apparatus therefor. The method for a terminal to receive resource allocation information in a wireless communication system comprises the steps of: receiving, from a base station, an enhanced-physical downlink control channel (E-PDCCH) comprising a downlink (DL) grant from a particular resource domain; decoding a resource allocation (RA) field, which is in DCI format, in the received E-PDCCH; and determining, on the basis of the decoded RA field, whether a physical downlink shared channel (PDSCH) is transmitted from the domains in the particular resource domain from which the DL grant domain is excluded, or, from the domains in the particular resource domain in which an UL grant domain exists and from which the DL grant domain and the UL grant domain are excluded. | 06-12-2014 |
20140161090 | METHOD OF OPERATING AN HARQ BUFFER FOR A DYNAMIC SUB-FRAME CHANGE AND AN APPARATUS FOR SAME - The present invention relates to a method of supporting a Hybrid Automatic Repeat and request (HARQ) scheme of a reception end for supporting a dynamic resource change in a wireless communication system. In particular, the method includes the steps of receiving a change message for changing a currently applied first subframe setting to a second subframe setting from a transmission end, and transmitting and receiving a signal to and from the transmission end according to the second subframe setting, wherein a plurality of subframe settings including the first and second subframe settings are divided into one or more groups, the first and second subframe settings belongs to an identical group, and the HARQ scheme is applied according to the group-specific maximum number of HARQ processes and a soft buffer size for each HARQ process when the subframe setting is changed according to the change message. | 06-12-2014 |
20140161092 | METHOD FOR BASE STATION TRANSMITTING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - In the present invention, a method for a base station transmitting a downlink channel is disclosed. More particularly, the method comprises the steps of: dividing each of one or more resources blocks, which are allocated for the downlink control channel, into a predetermined number of subsets; deciding the number of subsets that comprise a resource allocation basic unit for the downlink control channel, based on a start symbol and/or an end symbol of the downlink control channel; mapping a transmission resource on the downlink control channel as the resource allocation basic unit comprising the predetermined number of subsets; and transmitting the downlink control channel by using the transmission resource that is mapped. | 06-12-2014 |
20140169316 | METHOD AND APPARATUS FOR SIGNAL TRANSCEIVING IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention is a method for a terminal to transmit a signal in a wireless communication system, the method for signal transmission comprising the steps of: determining a resource index for the transmission of a physical uplink control channel (PUCCH); and transmitting the PUCCH to any one transmission point among a plurality of transmission points, wherein the transmission point which is to receive the PUCCH is determined on the basis of where the resource index belongs among n number of parts of uplink bandwidths. | 06-19-2014 |
20140169345 | METHOD AND APPARATUS FOR ACQUIRING SYNCHRONIZATION IN RADIO COMMUNICATION SYSTEM - A method for acquiring synchronization by a user equipment (UE) in a radio communication system is disclosed. The method includes receiving a synchronization signal from a first transmission point, and acquiring synchronization to a second transmission point using the synchronization signal and information including a subframe offset received from the first transmission point, wherein the subframe offset is a subframe difference value between the first transmission point and the second transmission point. | 06-19-2014 |
20140192672 | METHOD AND APPARATUS FOR REPORTING A MEASUREMENT IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for reporting a measurement by a terminal, comprising the steps of: measuring the magnitude of a signal from a first transmission point; and measuring the magnitude of a signal from a second transmission point. The measurements of the magnitudes of the signals from each transmission point are performed using a channel state information reference signal. | 07-10-2014 |
20140211730 | METHOD FOR BASE STATION TO MULITIPLEX DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a base station to transmit a downlink control channel in a wireless communication system. Specifically, the method comprises the steps of: separating each resource block, of which there are at least one, into a preconfigured number of subsets; structuring basic resource allocation units for an downlink control channel as one of the subsets comprised in one or more resource blocks; configuring the basic resource allocation units, the number of which correspond to the aggregation level of the downlink control channel, as transmission resources; and using the transmission resource to transmit the downlink control channel to a terminal. | 07-31-2014 |
20140211734 | METHOD AND APPARATUS FOR INTER-CELL INTERFERENCE COORDINATION FOR TRANSMISSION POINT GROUP - The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for inter-cell interference coordination for a transmission point group. The method for carrying out an interference coordination in a wireless communication system according to one embodiment of the present invention comprises a step for exchanging interference coordination messages between transmission point groups, wherein one transmission group comprises a plurality of transmission points, and the interference coordination message can comprises interference coordination information about each individual transmission point unit within the one transmission point group, and interference coordination information about the overall transmission point unit within the one transmission point group. | 07-31-2014 |
20140211739 | METHOD AND USER EQUIPMENT FOR RECEIVING DOWNLINK SIGNALS, AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK SIGNALS - The present invention relates to methods and devices for transmitting/receiving downlink signals in a wireless communication system. The methods and devices according to the present invention receive a downlink grant for user equipment (referred to hereinafter as a first downlink grant) at a first of a plurality of resource units in a given resource region from a base station; and detect an uplink grant at a second of the plurality of resource units if resource assignment information in the first downlink grant has a first value, and detect downlink data at the resource unit if the resource assignment information has a second value. | 07-31-2014 |
20140213315 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for a terminal transmitting a sounding reference signal in a wireless communication system. More particularly, the method comprises the steps of: receiving from a network at least one first transmission power offset value of the sounding reference signal for a first cell; deciding transmission power of the sounding reference signal for the first cell, based on transmission power for an uplink data channel for a second cell and the at least one transmission power offset value; and transmitting the sounding reference signal for the first cell to the first cell. | 07-31-2014 |
20140219202 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION, USER EQUIPMENT, METHOD FOR RECEIVING UPLINK CONTROL INFORMATION, AND BASE STATION - In the present invention, a physical uplink control channel (PUCCH) resource, which is used for transmitting acknowledgement/negative ACK (ACK/NACK) information related to downlink control information, is determined on the basis of n | 08-07-2014 |
20140219238 | METHOD AND USER EQUIPMENT FOR TRANSMITTING CHANNEL STATE INFORMATION AND METHOD AND BASE STATION FOR RECEIVING CHANNEL STATE INFORMATION - Disclosed herein is a method for, at a user equipment (UE) capable of being served by a plurality of base stations, transmitting channel state information to at least one of the base stations in a wireless communication system. The method includes receiving resource allocation information on allocation of time-frequency resources used to transmit supplemental channel state information for a neighboring base station from a serving base station of the UE, and transmitting supplemental channel state information for the neighboring base station to the serving base station, using part of time-frequency resources allocated for transmission of channel state information for the serving base station, based on the resource allocation information. | 08-07-2014 |
20140233518 | METHOD IN WHICH A TERMINAL TRANSCEIVES A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present application relates to a method in which a terminal receives a signal in a wireless communication system. More particularly, the method comprises: a step of receiving, from a serving cell, interference mitigation information for mitigating interference from a neighboring cell; and a step of applying an interference mitigation technique based on the interference mitigation information so as to receive a signal from the serving cell. It is assumed that the serving cell does not apply said interference mitigation technique from after the reception of the interference mitigation information to the application of the interference mitigation technique. | 08-21-2014 |
20140233557 | METHOD AND APPARATUS FOR PERFORMING INTER-UE DIRECT COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed in the present application is a method in which a user equipment (UE) performs inter-UE direct communication in a wireless communication system. More particularly, the method includes the steps of: transmitting a request message to an eNodeB for direct communication with a UE of another party; receiving sequence information from the eNodeB for time synchronization with the UE of the other party; detecting a transmission sequence to be made from the UE of the other party, using the sequence information; and performing the inter-UE communication with the UE Of the other party. | 08-21-2014 |
20140241454 | METHOD AND APPARATUS FOR TRANSRECEIVING CHANNEL STATE INFORMATION IN COOPERATIVE MULTIPOINT COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting channel state information in a cooperative multipoint communication system. A method for a terminal transmitting the channel state information (CSI) with respect to multiple base stations in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving information on a periodic report setting of CSI including a rank indicator (RI) with respect to a first base station and a first type of precoding matrix indicator (PMI), and information on a periodic report setting of CSI including an RI with respect to a second base station and the first type of precoding matrix; and a step of transmitting the CSI to the first base station and the second base station on the basis of CSI report setting with respect to the first base station and the second base station, wherein a report on one of the first type of PMI with respect to the first base station, the first type of PMI with respect to the second base station, and the RI with respect to the second base station is omitted, and additional CIS can be transmitted when the report is omitted. | 08-28-2014 |
20140242995 | METHOD IN WHICH A TERMINAL TRANSCEIVES A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present application relates to a method in which a terminal transceives a signal in a wireless communication system. More particularly, the method comprises: a step of transmitting a measurement report on one or more neighboring base stations to a serving base station; a step of receiving a handover command message on a target base station from among said one or more neighboring base stations; and a step of performing handover to said target base station according to said handover command message. The handover command message includes an interference message received from said serving base station after performing said handover. | 08-28-2014 |
20140247743 | METHOD IN WHICH A TERMINAL CONNECTED TO A CELLULAR NETWORK MEASURES A WIRELESS LAN AND RECEIVES INFORMATION FOR MEASUREMENT IN A WIRELESS ACCESS SYSTEM, AND TERMINAL OR BASE STATION DEVICE FOR SAME - The present invention relates to a measurement method for the access of a terminal to a second base station in a wireless access system, and to a base station and terminal for the method. Provided is a measurement reporting method in a measurement method for the access of a first base station-based terminal to a second base station in a wireless access system, comprising the following steps: receiving information on the second base station from the first base station; measuring the second base station using the information on the second base station; and reporting the information obtained by the second base station measurement to the first base station, wherein the second base station measurement is performed on the basis of a reference signal transmitted by the second base station. A terminal device for the method is also provided. | 09-04-2014 |
20140247749 | METHOD AND APPARATUS FOR FEEDING BACK AGGREGATED CHANNEL STATE INFORMATION IN COOPERATIVE MULTIPOINT COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, in particular, to a method and apparatus for feeding back aggregated CSI using multiple CSI-RS setting information in a wireless communication system which supports CoMP. The method of a terminal feeding back aggregated CSI for cooperative transmission in the wireless communication system according to an embodiment of the present invention, includes the steps of respectively receiving first CSI-RS setting information and second CSI setting information for a first base station and a second base station participating in the cooperative transmission; receiving a first CSI-RS and a second CSI-RS setting information; calculating first CSI and second CSI using the first CSI-RS and the second CSI-RS; and transmitting the aggregated CSI calculated on the basis of the first CSI and the second CSI, wherein the first CSI-RS and the second CSI-RS can be transmitted on the same subframe. | 09-04-2014 |
20140247816 | METHOD AND DEVICE FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. Particularly, the present invention pertains to a method for receiving a PDCCH signal in a wireless communication system and a device therefor, and the method comprises: receiving a subframe that includes a PDCCH search space, monitoring a plurality of PDCCH candidates in the PDCCH search space, and performing an operation according to a PDCCH signal if the PDCCH signal indicated to the UE is detected, wherein if the subframe is a first subframe, the PDCCH search space is configured in a first time domain of the subframe, if the subframe is a second subframe, the PDCCH search space is configured in a second time domain of the subframe, and the first time domain and the second time domain are multiplexed at the subframe by time division multiplexing (TDM). | 09-04-2014 |
20140254530 | USER EQUIPMENT AND METHOD FOR TRANSMITTING UPLINK SIGNAL, AND BASE STATION AND METHOD FOR RECEIVING UPLINK SIGNAL - The present invention provides a method and an apparatus for transmitting an uplink signal in a Wireless communication system, and a method and apparatus for receiving the uplink signal. A base station transmits to the user equipment a first cell identifier and a second cell identifier. The user equipment transmits an uplink control signal and a first reference signal sequence for demodulating the uplink control signal, or transmits an uplink data signal and a second reference signal sequence for demodulating the uplink data signal. A first reference signal is generated by using the first cell identifier, and a second reference signal is generated by using the second cell identifier. | 09-11-2014 |
20140254531 | METHOD FOR MITIGATING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present application provides a method for allowing a cell to remove inter-cell interference in a wireless communication system. Specifically, said method comprises the steps of: receiving, from neighboring cells, time resource interference information on a first subframe type and a second subframe type; receiving, from said neighboring cells, first frequency resource interference information corresponding to said first subframe type and second frequency resource interference information corresponding to said second subframe type; and performing downlink communication and uplink communication by using said first frequency resource interference information, said second frequency resource interference information, and said time resource interference information. | 09-11-2014 |
20140254532 | METHOD FOR TRANSMITTING A DOWNLINK SIGNAL IN A BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND AN APPARATUS FOR SAME - The present invention relates to a method for determining a precoding matrix for downlink signal transmission in a base station cooperative wireless communication system. The method includes receiving from a first terminal first channel information between the first base station and the first terminal, and second channel information between a second base station and the first terminal, transferring the first and the second channel informations to the second base station, determining a first precoding matrix for a first channel maximizing the efficiency of transmission to the first terminal, and determining, by the second base station, a second precoding matrix for a third channel between the second base station and the first terminal in order for a signal transmitted from the second base station to the first terminal to be arranged in an area where a signal transmitted from the first base station to the first terminal is not used. | 09-11-2014 |
20140254537 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting reduced power-almost blank subframe (r-ABS) setting information from a first cell to a second cell, according to one embodiment of the present invention, comprises a step of the first cell transmitting to the second cell r-ABS pattern information for indicating the r-ABS which is setup by the first cell, and r-ABS power indication information for indicating transmission power of a physical downlink shared channel (PDSCH) of the first cell from the r-ABS, wherein the PDSCH transmission power of the first cell can be set to a transmission power which is low compared to a common subframe. | 09-11-2014 |
20140254708 | METHOD FOR REPORTING CHANNEL STATE INFORMATION ON A COORDINATED MULTI-POINT TRANSMISSION AND RECEPTION AGGREGATION, AND APPARATUS THEREFOR - According to one embodiment of the present invention, a method is disclosed in which user equipment (UE) that communicates with a coordinated multi-point transmission and reception (CoMP) aggregation transmits channel state information (CSI) on said CoMP aggregation in a wireless communication system. The method may enable the determination of the number of bits for inter-point phase information for points that belong to said CoMP aggregation, and the number of bits for a channel quality indicator (CQI) for said CoMP aggregation based on rank indicator (RI) information within the number of bits allocated for transmission of the channel state information, and may enable the transmission of the channel state information including the inter-point phase information and CQI on the CoMP aggregation to at least one of a plurality of points that belong to the CoMP aggregation in accordance with said determined number of bits. | 09-11-2014 |
20140269595 | METHOD AND DEVICE FOR RECEIVING OR TRANSMITTING DOWNLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for receiving and transmitting downlink control information in a wireless communication system are disclosed. The method for receiving a downlink control signal by a user equipment (UE) in a wireless communication system includes: receiving an Enhanced Physical Downlink Control Channel (EPDCCH) from a downlink serving base station (BS); and monitoring a plurality of EPDCCH candidates in an EPDCCH set contained in the received EPDCCH, wherein a minimum aggregation level (AL) of the EPDCCH candidates is associated with a downlink (DL) bandwidth of the wireless communication system and downlink control information (DCI) format. | 09-18-2014 |
20140269597 | METHOD FOR DETERMINING TRANSMISSION POWER INFORMATION OF DOWNLINK SUBFRAME AND APPARATUS THEREFOR - A method for an eNB to transmit a downlink signal to a User Equipment (UE) is disclosed. The method includes transmitting information about a data transmission power within an OFDM symbol in a data region of a downlink subframe to the UE. The information about the data transmission power is determined according to a specific condition and the specific condition includes at least one of presence/absence of a Cell-specific Reference Signal (CRS) within the symbol and a modulation scheme or a Modulation and Coding Scheme (MCS) of the symbol. The downlink subframe is a Non-Zero Power Almost Blank Subframe (NZP ABS) in which signals are transmitted at a lower transmission power than a transmission power of a normal subframe on downlink. | 09-18-2014 |
20140286232 | METHOD FOR TRANSMITTING CONTROL SIGNAL TO RELAY NODE AT BASE STATION IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting a control signal to a relay node at a base station in a multi-input multi-output (MIMO) wireless communication system is disclosed. The method comprises configuring relay-resource element groups (R-REGs) in a unit of four resource elements (REs) contiguous in the ascending order of subcarrier indexes, except for resource elements for a reference signal (RS); allocating transmission resources to the control signal in a unit of the relay-resource element group; and transmitting the control signal to the relay node by using the allocated transmission resources, wherein the resource elements for the reference signal include resource elements for channel state information-RS (CSI-RS), which include resource elements for a channel state information RS to which a transmission power of 0 is allocated. | 09-25-2014 |
20140286280 | METHOD FOR MEASURING STATE OF CHANNEL QUALITY IN WIRELESS COMMUNICATION SYSTEM INCLUDING CELLS FORMED WITH A PLURALITY OF NETWORK NODES, AND APPARATUS THEREFOR - Disclosed are a method for measuring a state of channel quality in a wireless communication system including cells formed with a plurality of network nodes and an apparatus therefor. The method of enabling a terminal to measure the state of channel quality in the wireless communication system including the cells formed with the plurality of network nodes, includes the steps of: receiving the information related to a resource in which at least one first type network node transmits a Channel State Information-Reference Signal (CSI-RS); and measuring the intensity of a received signal on only the resource for transmitting the CSI-RS according to at least one first type network node on the basis of the received information. | 09-25-2014 |
20140286283 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method for a base station transmitting transmission power of a subframe to a user equipment, according to one embodiment of the present invention, comprises a step of transmitting downlink control information to the user equipment through a physical downlink control channel (PDCCH), wherein the transmission power information of the subframe is indicated by information related to the PDCCH, and a value of the information related to the PDCCH can be decided based on a predetermined mapping relationship between the transmission power information and the value of the information related to the PDCCH. | 09-25-2014 |
20140293820 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method for supporting a measurement of a user equipment, according to one embodiment, comprising the steps of: a second cell deciding at least one measurement resource set with respect to the user equipment, based on subframe setting information of a first cell and/or transmission power information of the first cell; and the second cell transmitting to the user equipment information for indicating the at least one measurement resource set that is decided, wherein the subframe setting information of the first cell can include setting information with respect to a first almost blank subframe (ABS) and a second ABS. | 10-02-2014 |
20140293953 | METHOD FOR MEASURING A WIRELESS COMMUNICATION STATE IN A WIRELESS ACCESS SYSTEM, AND APPARATUS THEREFOR - Disclosed is a method for measuring a wireless communication state in a wireless access system that supports an environment in which the amount of an uplink resource and the amount of a downlink resource dynamically change. Also disclosed is an apparatus for the method. More particularly, the method comprises the steps of: transmitting information on a resource to be measured to user equipment; transmitting a reference signal to the user equipment; and receiving, from the user equipment, the result of measurement performed on the resource using the reference signal, wherein the resource to be measured is determined by considering whether the same resource is used for downlink or for uplink in a neighboring base station. | 10-02-2014 |
20140301330 | METHOD FOR ALLOWING TERMINAL TO PERFORM RANDOM ACCESS STEP IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a method for allowing a terminal to perform a random access procedure in a wireless communication system and a device therefor. Specifically, the method for allowing a terminal to perform a random access procedure in a wireless communication system comprises the steps of: setting a first search space for a first downlink control channel and/or a second search space for a second downlink control channel according to control channel configuration information of a terminal; and detecting a downlink data channel by blind decoding the first search space and/or the second search space, wherein the first downlink control channel and the second downlink control channel are detected by using different indicators. | 10-09-2014 |
20140301332 | METHOD AND DEVICE FOR INTER CELL INTERFERENCE COORDINATION IN WIRELESS COMMUNICATION SYSTEM - A method in which a second cell receives subframe pattern information on a first cell according to one embodiment of the present application comprises a step in which uplink almost blank subframe (ABS) pattern information and downlink ABS pattern information on the first cell are received by a second cell, wherein the downlink ABS pattern information is not separated into first and second type ABSs set by the first cell, and the first and second type ABS patterns of the first cell can be identified on the basis of the downlink ABS pattern information and the uplink ABS pattern information. | 10-09-2014 |
20140301346 | METHOD AND APPARATUS FOR TRANSCEIVING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for transceiving a downlink control channel. A method for a base station to transmit a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: selecting a resource element (RE) to which a demodulation reference signal (DMRS) is mapped; selecting an RE to which a downlink control channel is mapped; and transmitting the DMRS and the downlink control channel from the selected REs to a terminal, wherein the REs to which the downlink control channel is mapped constitute at least one resource element group (REG), and one or more REGs may be located on an orthogonal frequency division multiplex (OFDM) symbol on which the DMRS is mapped. | 10-09-2014 |
20140302866 | METHOD FOR ALLOWING TERMINAL TO DETERMINE UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a method for determining uplink transmission power of a terminal in a wireless communication system and a device therefore. Specifically, the method for allowing a terminal to determine uplink transmission power in a wireless communication system comprises the steps of: receiving information for determining uplink transmission power from an upper layer; measuring a path loss value for base stations, which participate in cooperate communication, on the basis of information for determining transmission power, on the basis of the received information for determining the transmission power and the measured path loss value, wherein the information for determining the transmission power is information for channel estimation of at least one base station which participates in the cooperative communication. | 10-09-2014 |
20140307695 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication and, more specifically, to a method for transmitting an HARQ) response by a UE in a wireless communication system, and an apparatus for the same. The method includes receiving an E-PDCCH signal on at least one of a plurality of enhanced physical downlink control channel (E-PDCCH) sets, each E-PDCCH set including a plurality of resources units indexed per E-PDCCH set; and transmitting the HARQ response using a physical uplink control channel (PUCCH) resource determined using the index of the first resource unit among one or more resource units carrying the E-PDCCH signal, wherein the index of the first resource unit is determined on the basis of the E-PDCCH set having the lowest index among the plurality of E-PDCCH sets when specific conditions are satisfied. | 10-16-2014 |
20140307700 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for enabling a base station to transmit control information in a wireless communication system according to one embodiment of the present invention, comprises a step of transmitting an enhanced physical downlink channel (E-PDCCH) for a terminal using at least one physical resource block pair among a plurality of physical resource block pairs for transmitting the E-PDCCH, wherein the plurality of physical resource block pairs include one or more physical resource block pair sets, and a parameter related to a demodulation reference signal for the E-PDCCH is set with respect to each physical resource block pair set. | 10-16-2014 |
20140307757 | METHOD AND DEVICE FOR DECODING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for allowing a terminal to decode a signal in a wireless communication system, and the method for decoding the signal comprises the steps of determining a spreading factor for a physical resource block pair included in a subframe; and decoding a decoding reference signal on said physical resource block pair by using an orthogonal sequence corresponding to said spreading factor. | 10-16-2014 |
20140313925 | MEASURING METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method for transmitting information for measuring a terminal by a first transmission point among a plurality of transmission points which use identical time division duplex (TDD) settings in a wireless communication system. The method is an information transmitting method and includes a step of transmitting a subframe set for measurement to the terminal, wherein the subframe set is determined from first and second pieces of information related to a change of the TDD setting. | 10-23-2014 |
20140314031 | METHOD AND USER EQUIPMENT FOR TRANSMITTING UPLINK SIGNAL, AND METHOD AND EVOLVED NODE B FOR RECEIVING UPLINK SIGNAL - A UE receives downlink control information from an eNB through a PDCCH (Physical Downlink Control channel) including one or more CCEs (Control Channel Elements). The UE transmits ACK/NACK (ACKnowledgment/Negative ACK) information associated with the downlink control information to the eNB by using at least one of a first PUCCH resource, which corresponds to an index determined on the basis of first offset information and an index of a specific CCE in the PDCCH and is generated using first cell identification information, and a second PUCCH resource, which corresponds to an index determined on the basis of second offset information and the index of the specific CCE and is generated using second cell identification information. | 10-23-2014 |
20140314038 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting control information by a base station in a wireless communication system, and includes a step of transmitting an enhanced physical downlink channel (EPDCCH) for a terminal using at least one physical resource block pair from among a plurality of physical resource block pairs. The plurality of physical resource block pairs include a plurality of resource units for the EPDCCH transmission to which an antenna port is allocated, respectively. When the EPDCCH for a terminal is transmitted using at least two resource units from among the at least one physical resource block pairs, the same pre-coding is applied to signals to be transmitted via at least two resource units. | 10-23-2014 |
20140314041 | CHANNEL ESTIMATION METHOD AND APPARATUS USING REFERENCE SIGNAL - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for estimating a channel using a reference signal. According to one embodiment of the present invention, a method in which a terminal estimates a channel in a wireless communication system may comprise the steps of: receiving a cell-specific reference signal (CRS) and a channel state information-reference signal (CSI-RS) from a base station; generating CSI of a channel estimated using the CRS on the basis of a channel estimated using the CSI-RS and a mapping relationship between the CRS port and the CSI-RS port; reporting the generated CSI to the base station; and demodulating data on the basis of the channel estimated using the CRS. | 10-23-2014 |
20140321313 | METHOD FOR MEASURING CHANNEL STATE INFORMATION IN A WIRELESS ACCESS SYSTEM AND APPARATUS FOR SAME - Disclosed are a method for measuring channel state information in a wireless access system that supports an environment in which an amount of uplink resource and an amount of downlink resource dynamically change, and an apparatus for the method. In detail, the method comprises: a step of receiving interference measurement resource information including information on the location of an interference measurement resource set in an uplink resource for interference measurement; a step of measuring interference being received from an adjacent cell at the location of the interference measurement resource; a step of calculating channel state information using the measured interference value; and a step of transmitting the calculated channel state information to a base station. | 10-30-2014 |
20140321407 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for allowing a terminal to transmit cone or more pieces of channel state information (CSI) in a wireless communication system, and the method for transmitting the CSI comprises the steps of: determining CSI reference resources from a subframe which is to transmit the one or more pieces of CSI; and transmitting the one or more pieces of CSI measured in the CSI reference resources wherein the determination of the CSI reference resources uses measurement sets which include one or more interference measurement sets and one or more signal measurement sets, and if the CSI reference resources are included in an overlapping manner in two or more of the one or more interference measurement sets and the one or more signal measurement sets, a resource for measuring interference or a signal is separated within the CSI reference resources. | 10-30-2014 |
20140328312 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced control channel-based operation. A method for a base station for transmitting a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: determining one antenna port to be used for the downlink control channel; mapping the downlink control channel to a resource element on the basis of a reference signal for the one antenna port; and transmitting the mapped downlink control channel to a terminal, wherein an index for the one antenna port can be determined on the basis of a control channel element (CCE) index of the downlink control channel derived from the terminal identifier. | 11-06-2014 |
20140341057 | METHOD FOR MEASURING LINK QUALITY IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for reporting the link quality of a downlink by a terminal. Specifically, the method includes the steps of: receiving, from a serving cell, a subframe set for resource-limited measurement and information regarding a cell-specific reference signal of an interference cell; measuring link quality of a downlink in the subframe set; and reporting the measured link quality of the downlink to the serving cell, wherein interference control processing due to the cell-specific reference signal from the interference cell is applied to the subframe set using the information regarding the cell-specific reference signal of the interference cell. | 11-20-2014 |
20140341093 | METHOD FOR SETTING DOWNLINK TRANSMISSION POWER IN WIRELESS ACCESS SYSTEM, AND APPARATUS THEREFOR - Disclosed are a method for setting downlink transmission power in a wireless access system supporting an environment in which an amount of uplink resources and an amount of downlink resources dynamically change, and an apparatus therefore. Specifically, the method comprises the steps of: classifying resources to be used for downlink transmission into a plurality of sets; setting downlink transmission power to be different for each of the plurality of classified sets; and transmitting a downlink signal by using the set downlink transmission power. | 11-20-2014 |
20140341114 | METHOD AND DEVICE FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for allowing a base station to transmit a reference signal in a wireless communication system, and the method for transmitting the reference signal comprises the steps of: generating a reference signal sequence; and applying an orthogonal sequence to said reference signal sequence, and mapping to resources of each antenna port, wherein said antenna ports are included in one of first and second antenna port sets, and the configuration of the antenna ports included in said respective antenna port sets varies according to the number of available resource elements in a physical resource block pair. | 11-20-2014 |
20140341149 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced-control channel-based operation. A method for a terminal for transmitting confirmation response information in a wireless communication system according to one embodiment of the present invention comprises a step for transmitting confirmation response information for a downlink data channel by means of an uplink control channel resource, wherein an index for the uplink control channel resource can be determined on the basis of a delegate antenna port of a downlink control channel derived from the identifier of the terminal. | 11-20-2014 |
20140342747 | DEVICE-TO-DEVICE COMMUNICATION METHOD AND A DEVICE THEREFOR - The present invention relates to a method for performing device-to-device (D2D) communication by a first terminal and a second terminal in a wireless communication system. The method includes: receiving a D2D communication setup response message including resource region information for the D2D communication from a base station; determining, based on the resource region information, whether to switch an operation frequency band of the first terminal from a first frequency band to a second frequency band; and performing the D2D communication with the second terminal at the first frequency band or the second frequency band according to the determined result, wherein either the first frequency band or the second frequency band may be used for transmission in the D2D communication and the other may be used for reception in the D2D communication. | 11-20-2014 |
20140348015 | METHOD AND DEVICE FOR MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for allowing a terminal to measure at least one or more transmission points among a first transmission point and a second transmission point, which are neighboring cells, in a wireless communication system, and the measurement method comprises the steps of: measuring a reference signal strength indicator (RSSI) in a predetermined resource of a subframe; and measuring reference signal received quality (RSRQ) from said RSSI and reference signal received power (RSRP), wherein said predetermined resource is associated with the setting of an almost blank subframe (ABS) of said first transmission point for said subframe. | 11-27-2014 |
20140348075 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for a terminal to transmit channel state information (CSI) comprises the steps of: determining a precoding matrix by selecting a first precoding matrix and a second precoding matrix; and transmitting the CSI including an index of the said first precoding matrix and an index of the said second precoding matrix. The said first precoding matrix relates to a method for transmitting CSI in which a revision factor according to a relationship between the said terminal and a transmission point is applied. | 11-27-2014 |
20140348098 | METHOD FOR TRANSMITTING AND RECEIVING SIGNAL BASED ON DYNAMIC CHANGE OF WIRELESS RESOURCE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present application relates to a method for enabling a terminal to transmit or receive a signal to or from a base station in a wireless communication system. Specifically, the method comprises the steps of: acquiring at least one amongst a downlink grant and an uplink grant in a specific sub-frame; determining the use of a dynamic sub-frame which is changeable for the dynamic use on the basis of the acquired grant information as one amongst an uplink transmission or a downlink reception; and transmitting or receiving the signal to or from the base station according to the determined use. | 11-27-2014 |
20140348103 | METHOD FOR RESOURCE ALLOCATION FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a base station to transmit a downlink control channel in a wireless communication system. Specifically, the method comprises the steps of: determining, on the basis of the number of usable resource elements in one pair of resource blocks, the size of a resource allocation unit for a downlink control channel and the number of resource allocation units within one pair of resource blocks; mapping the downlink control channel, from a preset number of resource block pairs, to the transmission resource on the basis of the determined resource allocation unit; and transmitting the downlink control channel to a terminal, wherein the size of the resource allocation unit is defined by the number of resource elements and is varied according to the number of usable resource elements. | 11-27-2014 |
20140348126 | METHOD AND DEVICE FOR DETERMINING REFERENCE SIGNAL ANTENNA PORT FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method of transmitting a downlink control channel including one or more control channel elements to a terminal by a base station in a wireless communication system. In particular, the method includes: allocating an antenna port of a demodulation-reference signal (DM-RS) to the one or more control channel elements that configure the downlink control channel; and transmitting the downlink control channel to the terminal by using the DM-RS of the allocated antenna port, wherein the antenna port of the DM-RS is determined on the basis of the number of control channel elements per resource block. | 11-27-2014 |
20140362720 | METHOD AND APPARATUS FOR TRANSMITTING MEASUREMENT REPORT IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a measurement report in a wireless communication system are disclosed. The method for transmitting a measurement report at a UE in the wireless communication system includes measuring received strengths and reception frequencies of first and second signals, and transmitting a measurement report including a frequency offset between the first and second signals, if the received strength of the second signal is equal to or larger than a predetermined threshold. The frequency offset is used to support cooperative transmission of transmission points transmitting the first and second signals. | 12-11-2014 |
20140362758 | METHOD FOR SETTING SEARCH REGION TO DETECT DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - In the present application, disclosed a method for a terminal setting a search region for a downlink channel in a wireless communication system. More specifically, the method comprises the steps of receiving from a base station information related to a starting symbol of the search region by way of upper layer signaling; setting the search region by using the information related to the starting symbol; and receiving the downlink control channel by performing blind coding on the search region, wherein the starting symbol of the search region changes according to the characteristic of a subframe which receives the downlink control channel. | 12-11-2014 |
20140362796 | METHOD AND APPARATUS FOR ALLOCATING CHANNELS RELATED TO UPLINK BUNDLING - A new PHICH channel and a new PDCCH channel are allocated when the location of a subframe to be used in transmission changes by the change in the configuration of the subframe caused by a dynamic uplink/downlink configuration in a subframe bundling transmission mode. In the event that a subframe is successfully transmitted in a subframe bundling mode, the location of the subframe that has been successfully transmitted is determined as a reference in determining the point of time of the response to the bundling transmission. In addition, the bundling transmission following the subframe that has been successfully transmitted can be omitted. | 12-11-2014 |
20140370908 | METHOD FOR REDUCING INTER-CELL INTERFERENCE IN COOPERATIVE MULTI-CELL WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method for reducing inter-cell interference in a wireless communication system and to an apparatus for same. More specifically, a method for reducing the inter-cell interference between serving cells in the cooperative multi-cell wireless communication system comprises the steps of: receiving from an adjacent cell interference information on a specific wireless resource region; and reducing interference with respect to the specific wireless resource region based on the interference information, wherein the specific wireless resource region is a wireless resource region that the serving cell uses by changing the purpose of a wireless resource. | 12-18-2014 |
20140376356 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an uplink signal. A method for transmitting an uplink signal at a UE in a wireless communication system includes, when a virtual cell ID for a reference signal for demodulation of a physical uplink channel is provided, generating a sequence of the reference signal on the basis of the virtual cell ID, and transmitting the generated reference signal to an eNB. A cycle shift hopping pattern of the reference signal can be determined on the basis of the virtual cell ID. | 12-25-2014 |
20140376456 | METHOD FOR TRANSMITTING A DOWNLINK CONTROL CHANNEL BY A BASE STATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - Disclosed in the present application is a method for receiving an ACK/NACK (Acknowledgement/Negative Acknowledgement) signal by a terminal in a wireless communication system. More specifically, the method comprises the steps of: transmitting an uplink data signal to a base station; a blind decoding of downlink control information including an ACK/NACK response signal regarding the uplink data signal so as to acquire a decoded signal; and checking the ACK/NACK response signal, corresponding to the terminal, from among the downlink control information. The downlink control information consists of ACK/NACK response signals corresponding to a plurality of terminals. | 12-25-2014 |
20140376486 | METHOD FOR EXECUTING RANDOM ACCESS PROCEDURE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a terminal to execute a random access procedure in a wireless communication system. Specifically, the method comprises the steps of: transmitting a random access preamble message to one or more nodes; receiving a random access response message from a serving cell from among the one or more nodes; and transmitting an uplink signal to a different node from among the one or more nodes, wherein the random access response message comprises information for transmitting the uplink signal to the different node. | 12-25-2014 |
20140376489 | ACK/NACK TRANSMISSION METHOD IN WIRELESS ACCESS SYSTEM AND APPARATUS THEREFOR - An ACK/NACK (acknowledgement/negative-ACK) transmission method in a wireless access system that supports device-to-device communication and an apparatus therefor are disclosed. Specifically, a method for transmitting ACK/NACK in a wireless access system that supports the device-to-device communication comprises the steps of: receiving first data in a first sub-frame, receiving second data from a base station in a second subframe, and when data transmission and reception through the device-to-device communication carried out in a third sub-frame for transmitting the ACK/NACK information on the first data, transmitting, to the base station in a fourth sub-frame, a grouped ACK/NACK information including the ACK/NACK information on the first data and the ACK/NACK information on the second data. | 12-25-2014 |
20140380133 | METHOD FOR NETWORK CODING FOR COOPERATIVE RELAY NETWORK IN WIRELESS COMMUNICATION SYSTEM - A method for processing a signal at a relay node in a wireless communication system is disclosed. More specifically, the relay node receives a codeword broadcast from a source node. Here, the codeword is partitioned into a plurality of sub-blocks by the source node. Then, the relay node generates two network encoded codewords by combining linearly the plurality of sub-blocks and transmits the two network encoded codewords to a destination node. | 12-25-2014 |
20150016239 | METHOD AND APPARATUS FOR SETTING REFERENCE SIGNAL - Disclosed are a method and an apparatus for setting a reference signal. A wireless apparatus receives a primary synchronization signal (PSS) transmitted by a first orthogonal frequency division multiplexing (OFDM) symbol and a secondary synchronization signal (SSS) from a second OFDM symbol, and can search information for setting a reference signal on the basis of symbol numbers of the first OFDM symbol and the second OFDM symbol. Inter-cell interference can be reduced by means of a variety of methods for setting a reference signal. | 01-15-2015 |
20150016317 | METHOD FOR CONTROLLING TRANSMISSION POWER OF SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - In the present invention, disclosed is a method for a terminal, which receives a downlink signal from a first base station and transmits an uplink signal to a second base station, transmitting a sounding reference signal (SRS) in a wireless communication system. More specifically, the method comprises the steps of: receiving from the first base station downlink control information including a triggering message of a first SRS; determining transmission power of the first SRS on the basis of the downlink control information; and transmitting the first SRS to the first base station with the transmission power that is determined, wherein a transmission power control command field, which is included in the downlink control information, is applied to a closed loop parameter for determining the transmission power of the first SRS. | 01-15-2015 |
20150016318 | METHOD FOR OPERATING HARQ TO CHANGE DYNAMIC RESOURCE OF WIRESS RESOURCE IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present application discloses a method for executing a hybrid automatic repeat and request (HARQ) process from a particular layer at a receiving end in a wireless communication system. Specifically, the method comprises the steps of: receiving predetermined information regarding one or more HARQ processes from a subordinate layer so as to change a configuration of a previously configured first uplink/downlink subframe configuration to a configuration of a second uplink/downlink subframe configuration; and processing one or more HARQ processes on the basis of the predetermined information when changing to the second uplink/downlink subframe configuration, wherein the one or more HARQ processes are HARQ processes, from among the HARQ processes linked to the first uplink/downlink subframe configuration, which cannot be linked to the second uplink/downlink subframe configuration. | 01-15-2015 |
20150016331 | APPARATUS FOR RECEIVING DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - A method of receiving downlink signal at a user equipment in a wireless communication system is disclosed. The present invention includes receiving an information related to a reference signal of a neighbor cell from a serving cell and performing an interference handling in resources in accordance with the information related to the reference signal of the neighbor cell, wherein the information related to the reference signal of the neighbor cell comprises at least one selected from the group consisting of a cell ID (identity) of the neighbor cell, the number of ports for transmitting the reference signal of the neighbor cell, an frequency information for transmitting the reference signal of the neighbor cell and an time information for transmitting the reference signal of the neighbor cell. | 01-15-2015 |
20150016369 | METHOD FOR RECEIVING DOWNLINK DATA CHANNELS IN MULTICELL-BASED WIRELESS COMMUNICATION SYSTEMS AND APPARATUS FOR SAME - The present invention relates to a method by which a terminal receives a downlink data channel based on a terminal-specific reference signal in a wireless communication system. In detail, the method includes the steps of: receiving from a network information on one or more settings defining large scale properties of a terminal-specific reference signal through a higher layer; detecting from the network scheduling information on a downlink data channel based on a terminal-specific reference signal; and receiving from the network the downlink data channel based on the terminal-specific reference signal on the basis of the scheduling information, wherein the scheduling information includes an indicator indicating one or more of the settings. | 01-15-2015 |
20150016371 | METHOD FOR TERMINAL RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for receiving a downlink signal in a wireless communication system and an apparatus for same. More specifically, a method for a terminal receiving the downlink signal in the wireless communication system supporting a coordinated multi-point (CoMP) action comprises the steps of: receiving from a serving cell which operates according to a first uplink-downlink setting monitoring information with respect to an adjacent cell which operates according to a second uplink-downlink setting; and detecting control information of the adjacent cell based on the monitoring information, wherein the first uplink-downlink setting and/or the second uplink-downlink setting is a setting established by changing a portion of a wireless resource according to a specific predetermined uplink-downlink setting. | 01-15-2015 |
20150016376 | METHOD FOR PROVIDING TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - in the present invention, disclosed is a method for a user equipment transreceiving signals with a network in a wireless communication system. More particularly, the method comprises the steps of: receiving a downlink control channel from the network; and either transmitting an uplink data channel to the network or receiving a downlink data channel from the network, depending on scheduling information included in the downlink control channel, wherein the scheduling information includes information with respect to a reference signal-to-downlink data channel power ratio. | 01-15-2015 |
20150016377 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION - Disclosed are a method and an apparatus for uplink transmission. A method for uplink transmission for a machine-type communication (MTC) terminal comprises: a step of transmitting first uplink (UL) information via a first UL channel in a first terminal-specific frequency band of a first subframe; and a step of transmitting second UL information via a second UL channel in a second terminal-specific frequency band of a second subframe subsequent to the first subframe. The first subframe and the second subframe each include a plurality of orthogonal frequency division multiplexing (OFDM) symbols. If the first terminal-specific frequency band and the second terminal-specific frequency band do not overlap one another, the second UL information may not be transmitted in a first OFDM symbol of the second subframe. Thus, a wireless resource can be efficiently utilized. | 01-15-2015 |
20150016410 | DEVICE TO DEVICE COMMUNICATION METHOD AND DEVICE FOR PERFORMING SAME - Provided is a method for performing device-to-device communication between a first user equipment (UE) and a second UE in a wireless communication system, the method comprising: receiving reception scheduling information for D2D communication from a base station in a first frequency band, receiving data for D2D communication from the second UE in a second frequency band based on the reception scheduling information and transmitting feedback information to the base station in response to reception of the data for D2D communication in the second frequency band, wherein the reception scheduling information is received in a subframe different from a subframe including transmission scheduling information associated with the reception scheduling information, and wherein the reception scheduling information indicates resources on which the first UE receives the data from the second UE and the transmission scheduling information indicates resources on which the second UE transmits the data to the first UE. | 01-15-2015 |
20150016419 | METHOD AND APPARATUS FOR ACQUIRING SYSTEM INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for acquiring system information in a wireless communication system are disclosed. The method for acquiring system information by a user equipment (UE) in a wireless communication system includes: performing a handover from a first cell to a second cell; and acquiring system information of the second cell, wherein a method for acquiring the system information of the second cell is determined according to CRE (Cell Range Extension)-related capability of the UE. | 01-15-2015 |
20150018030 | METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present application relates to a method for enabling a terminal to transmit a sounding reference signal (SRS) in a wireless communication system. Specifically, the method comprises the steps of selecting at least one SRS power control process of a first SRS power control process and a second SRS power control process on the basis of a terminal location area; determining the transmission power of the SRS by using at least one SRS power control process; and transmitting at least one SRS to at least one base station of a first base station and a second base station participating in base cooperation communication, using the determined SRS transmission power. The terminal location area is characterized in that the base station from which downlinks are received and the base station to which uplinks are transmitted, comprise different base station cooperation areas. | 01-15-2015 |
20150023145 | METHOD FOR TRANSMITTING AND RECEIVING SIGNAL ON BASIS OF DYNAMIC CHANGE IN WIRELESS RESOURCE IN WIRELESS COMMUNICATION SYSTEM TO WHICH CARRIER AGGREGATION SCHEME IS APPLIED, AND DEVICE THEREFORE - A method for transmitting and receiving a signal by a terminal a wireless communication system is disclosed in the present invention. More particularly, the method comprises the steps of: receiving an indicator for changing the usage of a specific subframe corresponding to a sub-component carrier from a network; determining whether near-end crosstalk between the sub-component carrier and another component carrier occurs if the usage of the subframe is changed according to the indicator; and transmitting and receiving a signal to and from the network through the sub-component carrier according to the changed usage if it is determined that the near-end crosstalk does not occur. | 01-22-2015 |
20150023194 | METHOD FOR TRANSCEIVING CHANNEL STATE INFORMATION IN WIRELESS ACCESS SYSTEM AND APPARATUS FOR THE METHOD - Disclosed is a method for transceiving channel state information in a wireless access system and an apparatus for the method. More particularly, the method comprises: a step of receiving, from user equipment, channel state information measurement capability indicating the total number of pieces of channel state information which can be measured by the user equipment; a step of transmitting, to the user equipment, information regarding the object for channel state information measurement set in the user equipment; and a step of receiving, from the user equipment, channel state information measured in the object for channel state information measurement. The object for channel state information measurement is restrictively set such that the total number of the objects for channel state information measurement is the same as or less than the channel state information measurement capability. | 01-22-2015 |
20150023265 | METHOD FOR RECEIVING DOWNLINK DATA CHANNELS IN MULTICELL-BASED WIRELESS COMMUNICATION SYSTEMS AND APPARATUS FOR SAME - The present invention relates to a method by which a terminal receives a downlink data channel in a wireless communication system. In detail, the method includes the steps of receiving from a network information on one or more settings defining large scale properties of a terminal-specific reference signal through a higher layer; detecting from the network one of either the first scheduling information or the second scheduling information on a downlink data channel based on a terminal-specific reference signal; and receiving the downlink data channel based on the terminal-specific reference signal on the basis of the detected scheduling information, wherein the first scheduling information includes an indicator indicating one or more of the settings, and the large scale properties of the terminal-specific reference signal are defined according to the setting indicated by the indicator during the detection of the first scheduling information, and a preset setting from among the one or more settings set during the detection of the second scheduling information. | 01-22-2015 |
20150023269 | METHOD FOR TRANSMITTING UPLINK DATA INFORMATION IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for transmitting uplink data information in a wireless communication system, and an apparatus therefor. Specifically, the method for a terminal for transmitting uplink data information by means of a hybrid automatic repeat request (HARQ) comprises the steps of: configuring at least one uplink subframe on the basis of first HARQ process; changing a particular uplink subframe, from among the uplink subframes, to a downlink subframe; receiving, from a base station, an indication information indicating the change from the first HARQ process to a second HARQ process; reconfiguring, in accordance with the indication information, at least one uplink subframe on the basis of the second HARQ process; and transmitting uplink data information by means of the reconfigured uplink subframe. | 01-22-2015 |
20150023270 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more specifically, to a method and an apparatus for transmitting an uplink signal. The method for transmitting an uplink signal from a terminal in a wireless communication system, according to one embodiment of the present invention, comprises the steps of: receiving configuration information about candidates in a parameter set for a reference signal for physical uplink shared channel (PUSCH) modulation; receiving information indicating a specific set among the candidates in the parameter set; and generating a sequence of the reference signal using the specific set and transmitting the generated reference signal to a base station, wherein the information indicating the specific set may have a maximum value of the minimum distance between a circular shift index of the reference signal generated by a terminal using the specific set and a circular shift index of a reference signal generated by another terminal using the specific set. | 01-22-2015 |
20150029884 | METHOD AND APPARATUS FOR TAKING MEASUREMENTS ON NEIGHBORING CELLS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method by which a terminal takes measures on a neighboring cell in a wireless communication system, which includes the steps of: receiving a channel state information-reference signal (CSI-RS) transmitted from the neighboring cell by using first time information received from a serving cell; and taking measurements using the CSI-RS, wherein the first time information is generated on the basis of the second time information of a serving cell, which receives an uplink signal from the terminal, and the third time information from a neighboring cell, which receives the uplink signal. | 01-29-2015 |
20150029885 | METHOD AND APPARATUS FOR MEASURING IN A WIRELESS COMMUNICATION SYSTEM - A method for a terminal for taking a measurement in a wireless communication system according to an embodiment of the present invention comprises the steps of: measuring a reference signal strength indicator (RSSI); and determining reference signal received quality (RSRQ) from the RSSI and reference signal received power (RSRP), wherein the subframe for which the measurement is taken is directed by upper layer signaling, and if the terminal can obtain reference signal information of the neighboring cell, the RSSI is measured on the basis of an OFDM symbol, comprising a reference signal, in the subframe. | 01-29-2015 |
20150029886 | COMMUNICATION METHOD IN CONSIDERATION OF CARRIER TYPES AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. In particular, the present invention relates to a method for a terminal to receive a downlink signal in a wireless communication system and to an apparatus for same, the method comprising the steps of: receiving, from a base station, a first piece of information indicating the start point of a multicast broadcast single frequency network (MBSFN) signal, receiving an MBSFN subframe having a plurality of orthogonal frequency division multiplexing (OFDM) symbols, and receiving the MBSFN signal from an OFDM symbol indicated by the first piece of information in the MBSFN subframe. | 01-29-2015 |
20150029926 | METHOD FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS ACCESS SYSTEM AND APPARATUS FOR SAME - Disclosed are a method for transmitting and receiving data in a wireless access system supporting relay nodes, and an apparatus for same. In particular, the present invention comprises: a broadcast phase for receiving an acknowledgement (ACK) signal from a first terminal and a negative acknowledgement (NACK) signal from a second terminal, after a base station transmits first data to the first terminal by using a first precoding vector (w1, B), and second data to the second terminal by using a second precoding vector (w2, B); a listening phase for receiving an ACK signal from the first terminal and a NACK signal from the second terminal, after the base station transmits second data to the first and second terminals by using a third precoding vector (wL); and a cooperative phase for the base station to transmit the second data to the second terminal, in cooperation with the first terminal, by using a fourth precoding vector (wC) which has been chosen for maximizing the transmission efficiency of the second terminal, wherein the first precoding vector, the second precoding vector, and the third precoding vector are chosen so that the total length of the rounds of all phases is minimized. | 01-29-2015 |
20150029966 | METHOD FOR REPORTING CHANNEL STATE INFORMATION, METHOD FOR SUPPORTING SAME, AND APPARATUS FOR SAID METHODS - According to one embodiment of the present invention, the method for receiving a channel state information (CSI)-reference signal (RS) from a wireless communication system by a user device comprises the steps of: receiving resource configuration information on the CSI-RS; and receiving the CSI-RS on the basis of the resource configuration information on the CIS-RS, wherein the resource configuration information on the CSI-RS includes information on a cell specific-RS (CRS) related to the CSI-RS, and the user device can assume that an antenna port related to information on the CRS and an antenna port used for transmitting CSI-RS corresponding to the resource configuration information on the CSI-RS are quasi co-located. | 01-29-2015 |
20150029968 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting an uplink signal. A method for transmitting an uplink signal at a UE in a wireless communication system includes, when a virtual cell ID for a reference signal for demodulation of a physical uplink channel is provided, generating a sequence of the reference signal on the basis of the virtual cell ID, and transmitting the generated reference signal to an eNB. A group hopping pattern of the reference signal can be determined on the basis of the virtual cell ID. | 01-29-2015 |
20150036524 | METHOD AND APPARATUS FOR MEASURING NEIGHBOR CELL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for measuring a neighbor cell in a wireless communication system are disclosed. The method for measuring a neighbor cell by a user equipment (UE) in a wireless communication system includes: receiving subframe information including a subframe pattern for neighbor cell measurement; performing synchronization acquisition from the neighbor cell; and performing measurement in a subframe corresponding to the subframe pattern, wherein the user equipment (UE) assumes that a signal required when the UE acquires synchronization from the neighbor cell is transmitted in a subframe corresponding to the subframe pattern. | 02-05-2015 |
20150036560 | METHOD AND DEVICE FOR ALLOCATING RESOURCE FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - Disclosed is a method for a base station to transmit a downlink control channel to a terminal in a time division duplex (TDD)-based wireless communication system. Specifically, the method comprises determining the number of basic resource allocation units for each resource block pair for a downlink control channel on the basis of the type of a sub-frame during which the downlink control channel is transmitted; mapping, by basic resource allocation unit, control information for the terminal to a transmission resource; and transmitting, to the terminal, the downlink control channel comprising the control information, wherein, if the type of the sub-frame is the type in which a downlink transmission interval and a uplink transmission interval coexist, then the number of basic resource allocation unit for each resource block pair is determined on the basis of the length of the downlink transmission interval. | 02-05-2015 |
20150036652 | METHOD FOR RECEIVING OR TRANSMITTING DOWNLINK SIGNALS AND APPARATUS THEREFOR - Disclosed is a method for receiving downlink signals in a wireless communication system, the method comprising: receiving downlink signal from a base station and detecting the downlink signal, wherein the detecting the downlink signal includes, if the number of resource elements (REs) to which channel state information-reference signal (CSI-RS) in a downlink subframe is mapped is smaller than the number of the enhanced control channel elements (eCCEs) for an enhanced physical downlink control channel (EPDCCH) in the downlink subframe, assuming REs, the number of which corresponds to a difference value between the number of eCCEs and the number of REs, which are included in the EPDCCH, as a zero-power CSI-RS, wherein the REs assumed as the zero-power CSI-RS is included in an eCCE that does not comprise the REs to which the CSI-RS is mapped. | 02-05-2015 |
20150043355 | METHOD AND DEVICE FOR MONITORING DOWNLINK CHANNELS - Disclosed are a method and a device for monitoring a downlink control channel in a wireless communication system. The method for monitoring a downlink control channel in a wireless communication system may comprise the steps of determining whether a common search space in a subframe exists in a physical downlink control channel (PDCCH) region or in an enhanced physical downlink control channel (ePDCCH) region; and when the common search space exists in the ePDCCH region, monitoring, in the ePDCCH region, a downlink control channel for hybrid automatic repeat request (HARQ) acknowledgement (ACK) or non-acknowledgement (NACK) information. | 02-12-2015 |
20150043368 | METHOD AND APPARATUS FOR TRANSMITTING INFORMATION FOR REPORTING IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for a serving cell transmitting information for reporting a terminal measurement and/or reporting channel state information in a wireless communication system, and more specifically, to a method for transmitting information comprising a step of transmitting information to the terminal the measurement report and/or the channel state information report, wherein the information includes a plurality of channel state information-reference signal (CSI-RS) settings, wherein each of the plurality of CSI-RS settings includes information related to a bandwidth from which the CSI-RS is transmitted according to the relevant CSI-RS setting. | 02-12-2015 |
20150043369 | METHOD AND APPARATUS FOR PERFORMING MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for performing measurement are disclosed. The method for performing radio link monitoring by a user equipment (UE) in a wireless communication system includes: performing cancellation of a reference signal (RS) of a neighbor cell; and determining whether to declare a radio link failure (RLF) on the basis of a reference signal (RS) of a serving cell by using information of a predetermined power ratio related to the neighbor cell. | 02-12-2015 |
20150043458 | METHOD AND APPARATUS FOR TRANSMITTING PERIODIC CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method for transmitting uplink control information by a user equipment in a wireless communication system, and a user equipment using the method. In the method, a setting of subframes for transmitting each of multiple types of periodic channel state information (CSI) is received, and the multiple types of the periodic CSI from the subframes are transmitted, wherein when the multiple types of the CSI are set to include a rank indicator (RI) for indicating the number of layers recommended by the user equipment, and the RI and a different periodic CSI excluding the RI are set to be transmitted from the same subframe, the RI and the different periodic CSI are multiplexed to the same subframe and then transmitted. | 02-12-2015 |
20150043468 | METHOD FOR SETTING START SYMBOL OF DOWNLINK CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention discloses a method for a terminal receiving a downlink signal on a predetermined subframe in a wireless communication system. More specifically, the method comprises the steps of: receiving an enhanced physical downlink control channel (EPDCCH) from a base station; and receiving a physical downlink shared channel (PDSCH) from the base station, on the basis of the EPDCCH, wherein the EPDCCH is assumed not to be mapped onto a resource block (RB) of a symbol for receiving a physical control format indicator channel (PCFICH) or a physical hybrid-ARQ indicator channel (PHICH), when the PCFICH or the PHICH is received by the predetermined subframe. | 02-12-2015 |
20150043469 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention discloses a method for allowing a terminal to transmit channel state information (CSI) in a wireless communication system in which a plurality of CSI reference signal (CSI-RS) resources are set for a plurality of transmission points, and the method for transmitting the CSI comprises the steps of: determining CSI reference resources; and transmitting CSI calculated from a measured signal on the basis of the CSI reference resources, wherein the CSI reference resources are included in one of at least two CSI subframe sets, the CSI subframe sets are set for each of the plurality of CSI-RS resources, and the CSI subframe sets are commonly set for transmission points which perform cooperative transmission among the plurality of transmission points. | 02-12-2015 |
20150043472 | METHOD FOR PERFORMING HIGH-SPEED HANDOVER IN BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM, AND DEVICE FOR SAME - Disclosed in the present application is a method for a terminal to perform a handover in a wireless communication system. In particular, the method comprises the steps of: receiving a random access triggering signal from a serving cell; executing a random access procedure with a target cell on the basis of the random access triggering signal; receiving a downlink signal from the serving cell and transmitting an uplink signal to the target cell; receiving, from the serving cell, a message ordering a handover to the target cell; and transmitting, to the target cell, a predetermined message indicating the completed handover, on the basis of the message ordering a handover. | 02-12-2015 |
20150043473 | METHOD AND WIRELESS EQUIPMENT FOR PERFORMING HARQ - A method and wireless equipment for performing a hybrid automatic repeat request (HARQ) in a wireless communication system are provided. The wireless equipment receives TB from a base station, and determines whether it is possible to completely perform decoding on the TB within a timing at which HARQ ACK/NACK for the TB is transmitted. If it is determined that it is difficult to completely perform the decoding on the TB, the wireless equipment transmits a discontinuous transmission (DTX) signal indicating the decoding on the TB was skipped to the base station. | 02-12-2015 |
20150043475 | CHANNEL INFORMATION TRANSMITTING METHOD AND DEVICE - A channel information transmitting method and device are disclosed. The method may comprise: a step in which a base station transmits first channel state information (CSI)-request triggering information to first user equipment (UE); a step in which the base station receives the channel state information of a first D2D link channel from the first UE in response to the first channel from the first UE in response to the first CSI-request triggering information; and a step in which the base station allocates the resource of the first D2D link channel to second UE on the basis of the channel state information. Accordingly, the present invention enables data to be transmitted directly between the user equipment without passing through the base station, thereby increasing the speed of data transmission between the user equipment and distributing the load thereof. | 02-12-2015 |
20150043544 | METHOD AND DEVICE FOR SENDING AND RECEIVING SIGNALS IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention concerns a method whereby a base station transmits signals in a wireless communication system. The signal transmission method which comprises a step of transmitting a downlink signal in a first subframe set for uplink use, wherein the transmission timing of the first subframe is determined by means of a second subframe that precedes the first subframe, and a time value for a terminal receiving the first subframe is used in the second subframe. | 02-12-2015 |
20150049689 | METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION REPORT AND USER EQUIPMENT, AND METHOD FOR RECEIVING CHANNEL STATE INFORMATION REPORT AND BASE STATION - The user equipment and the base station according to the present invention determine differently whether a downlink subframe is a valid reference resource for a channel state information report, in accordance with whether an interference measurement resource is explicitly configured to the user equipment. | 02-19-2015 |
20150049693 | METHOD AND DEVICE FOR RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for a terminal to receive a signal in a wireless communication system according to one embodiment of the present invention comprises a step for confirming whether a configuration change exists for a cell-specific reference signal (CRS) of a neighboring cell, and if the CRS configuration is changed for a neighboring cell, the method for receiving s signal comprises the steps of: receiving system information of the neighboring cell and acknowledging the changed CRS configuration thereby; and receiving s signal from a serving cell by means of the changed CRS configuration of the neighboring cell. | 02-19-2015 |
20150049704 | METHOD AND APPARATUS FOR TRANSMITTING OR RECEIVING DOWNLINK SIGNAL - The method for receiving a downlink signal by user equipment in a wireless communication system that supports coordinated multiple-point transmission and reception (CoMP) according to one embodiment of the present invention comprises a step of receiving information regarding two candidate seed groups for generating a sequence of downlink demodulation reference signals; and a step of generating a sequence of downlink demodulation reference signals using one of at least two candidate DMRS set parameter groups. Each of at least two candidate DMRS set parameter groups includes a cell identifier and a scrambling identifier. The scrambling identifier included in one of at least two candidate DMRS set parameter groups may be determined whether the two cell identifiers included respectively in at least two candidate DMRS set parameter groups are the same or not. | 02-19-2015 |
20150050930 | METHOD FOR DETECTING A SIGNAL FOR DIRECT COMMUNICATION BETWEEN UE'S IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for transmitting an identification signal from a first UE to a second UE for direct communication between UE's in a wireless communication system. In particular, the method includes the steps of: transmitting a first identification signal formed by using a part of the information on the first UE to the second UE; and transmitting a second identification signal including the rest of the information on the first UE to the second UE, wherein the transmission duration time of the second identification signal is longer than that of the first identification signal. | 02-19-2015 |
20150055485 | METHOD BY WHICH TERMINALS IN WIRELESS COMMUNICATION SYSTEMS RECEIVE DOWNLINK CONTROL CHANNELS AND APPARATUS FOR SAME - The present invention relates to a method by which terminals in a wireless communication system receive control channels. More particularly, the method includes the steps of: receiving control information that includes the transmission mode for the control channel and information about the number of antenna ports through a broadcast channel from a base station; and receiving the control channel on the basis of the control information. | 02-26-2015 |
20150055495 | METHOD AND APPARATUS FOR MEASURING SERVING CELL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for measuring a serving cell in a wireless communication system are disclosed. The method for performing measurement by a user equipment (UE) in a wireless communication system includes: receiving a list of aggressor cells and neighbor-cell reference signal (RS) information from a serving cell; and performing measurement of the serving cell, wherein information as to whether CRE (Cell Range Extension)-related capability is used during the measurement is determined according to at least one of the presence or absence of CRE-related capability of the UE and information regarding configuration or non-configuration of restricted measurement. | 02-26-2015 |
20150055502 | METHOD AND APPRATUS FOR MEASUREMENT FOR INTER-CELL INTERFERENCE COORDINATION IN RADIO COMMUNICATION SYSTEM - A method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system. The method according to an embodiment includes acquiring, by the first base station, information of a downlink subframe configuration of a second base station; and transmitting, by the first base station, information of measurement objects to the UE. The measurement objects are determined based on the downlink subframe configuration of the second base station. A measurement is performed by the UE in resources indicated based on the information of the measurement objects. The resources are determined as a combination of at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol and at least one downlink subframe. The downlink subframe configuration of the second base station includes information indicating at least one subframe configured as an Almost Blank Subframe (ABS). | 02-26-2015 |
20150055518 | METHOD FOR TRANSMITTING OR RECEIVING UPLINK SIGNAL - The present invention relates to a method for user equipment transmitting an uplink signal in a time division duplex (TDD) wireless communication system, according to one embodiment. The method comprises: detecting a downlink control signal; and transmitting the uplink signal on the basis of uplink-related control information which is included in the downlink control signal that is detected, wherein a transmission power value is reported on the basis of an indicator, which indicates reporting of the transmission power value of the uplink signal at a specific time. | 02-26-2015 |
20150055521 | METHOD AND DEVICE FOR AGGREGATING CARRIERS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and a device for aggregating carriers in a wireless communication system. In the method, a first carrier is configured, and a second carrier is configured in addition to the first carrier. The first carrier is a time division duplex (TDD) carrier for which an uplink subframe and a downlink subframe are positioned at different times in a frame, and the second carrier is a carrier only for an uplink, which consists of uplink subframes. | 02-26-2015 |
20150055584 | METHOD FOR DYNAMIC ALLOCATION OF RADIO RESOURCES IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a method for transmitting an uplink signal of a terminal using multiple component carriers in a wireless communication system and, more particularly, to a method for transmitting an uplink signal of a terminal using multiple component carriers in a wireless communication system which supports carrier aggregation, comprising the steps of: receiving setting information on a second-type component carrier from a base station through a first-type component carrier; and transmitting an uplink signal to the base station through the second-type component carrier, wherein the use of the second-type component carrier for a specific subframe is changed according to the setting information. | 02-26-2015 |
20150055616 | TRANSMISSION METHOD AND TRANSMISSION DEVICE - A wireless device generates a synchronization signal for maintaining synchronization and transmits the synchronization signal in a subframe containing a plurality of orthogonal frequency division multiplexing (OFDM) symbols. The first OFDM symbol in the subframe is divided into a first part and a second part, the last OFDM symbol in the subframe is divided into a first part and a second part, and the synchronization signal is transmitted in the second part of the first OFDM symbol and the first part of the last OFDM symbol. | 02-26-2015 |
20150063231 | METHOD FOR RECEIVING DOWNLINK CONTROL SIGNAL, USER EQUIPMENT, METHOD FOR TRANSMITTING DOWNLINK CONTROL SIGNAL AND BASE STATION - In the event where a channel strength between UE and eNB is weakened, the eNB of the present invention may configure downlink control information into the format in which at least one of fields of pre-defined existing format is deleted, the length of a relevant field is shortened to be shorter than a pre-defined length of the relevant field, or an error correcting code is added by the amount of the length deleted or reduced. UE decodes a downlink signal according to the modified format to acquire downlink control information of its own. | 03-05-2015 |
20150063234 | METHOD AND APPARATUS FOR TRANSMITTING OR RECEIVING DOWNLINK SIGNAL - Provided is a method for receiving a downlink signal by a user equipment (UE) in a wireless communication system supporting Coordinated Multi-point transmission and reception includes: receiving a list of candidate seeds for generating a sequence of a downlink demodulation reference signal (DM-RS) and downlink control information, and detecting the DCI; if a format of the detected DCI corresponds to a unique operation of a transmission mode configured to the UE, generating a sequence of the downlink DM-RS using one seed value selected from among the list of the candidate seeds on the basis of specific information included in the DCI; and if a format of the detected DCI corresponds to a fall-back operation of the transmission mode, generating a sequence of the downlink DM-RS using a specific seed value selected from among the list of the candidate seeds or an identifier (ID) of a serving cell. | 03-05-2015 |
20150063236 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention provides a method for enabling a terminal to receive control information in a wireless communication system, comprising the steps of: determining resource units for Enhanced Physical Downlink Control Channel (EPDCCH) of a plurality of resource units, with respect to each of one or more resource sets; and blind-decoding the resource units for the EPDCCH with respect to each of the one or more resource sets, wherein each of the one or more resource sets is set for one of localized EPDCCH transmission or distributed EPCCH transmission. | 03-05-2015 |
20150063247 | METHOD FOR PERFORMING HARQ FOR DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - Disclosed in the present application is a method for performing HARQ for device-to-device communication by a first user equipment in a wireless communication system. Particularly, the method comprises: receiving scheduling information for signal transmission from an eNode B to a second user equipment; transmitting data to the specific user equipment in a first subframe according to the scheduling information; and transmitting the data or new data to the second user equipment in a third subframe according to a response signal to the data, wherein the response signal is transmitted from the second UE to the eNode B in a second subframe positioned between the first subframe and the third subframe, and an interval between the first subframe and the third subframe, which is an HARQ period for the device-to-device communication, is set as a power number of an HARQ period between the first user equipment and the eNodeB. | 03-05-2015 |
20150071099 | Method and Apparatus for Receiving Downlink Data in Wireless Communication System - Provided is a method for receiving downlink data in a wireless communication system. User equipment (UE) receives downlink control information in a first subframe from a primary cell. The user equipment receives downlink data from a secondary cell in a second subframe over a physical downlink shared channel (PDSCH). The user equipment determines a transmission block size in accordance with the type of the carrier of the second subframe. The user equipment decodes the PDSCH on the basis of the downlink control information and the transmission block size. | 03-12-2015 |
20150071193 | SIGNAL TRANSMISSION METHOD AND USER EQUIPMENT, AND SIGNAL RECEPTION METHOD AND BASE STATION - According to the present invention, user equipment performs an HARQ operation for a signal in consideration of the interference experienced by the signal when the signal is received by the user equipment. An apparatus transmitting a signal to the user equipment retransmits the signal in consideration of the interference experienced by the signal when the signal reaches the user equipment on the basis of ACK/NACK information from the user equipment. | 03-12-2015 |
20150071195 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more specifically, to a method and an apparatus for transmitting and receiving a reference signal (RS). The method for enabling user equipment (UE) of the wireless communication system to transmit an uplink signal according to one embodiment of the present invention comprises the steps of: receiving information on candidates of a first parameter set used for generating a sequence of a first RS; and generating and transmitting a sequence of a second RS using a second parameter set determined among the candidates of the first parameter set. | 03-12-2015 |
20150071196 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system and, more specifically, to a method and an apparatus for transmitting and receiving a reference signal (RS). The method for enabling user equipment (UE) of the wireless communication system to transmit an uplink signal according to one embodiment of the present invention comprises the steps of: receiving information on a plurality of parameter sets used for generating a sequence of RS; and generating and transmitting the sequence of the RS using one parameter set determined among the plurality of parameter sets. The parameters constituting the plurality of parameter sets can comprise the parameters commonly applied to the plurality of parameter sets and the parameters individually applied to the plurality of parameter sets. | 03-12-2015 |
20150071207 | METHOD FOR TRANSMITTING CONTROL INFORMATION FOR DIRECT D2D COMMUNICATION IN WIRELESS COMMUNICATION SYSTEMS, AND APPARATUS FOR SAME - The present invention relates to a method for performing direct D2D communication by means of a first device in a wireless communication system. In particular, the method includes the steps of: detecting a scheduling message from a plurality of first subframes in which the search region of the scheduling message for D2D direct communication is activated; and performing direct D2D communication with a second device in a second subframe on the basis of the scheduling message, wherein the scheduling message includes an instructor instructing the direct D2D communication. | 03-12-2015 |
20150071208 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method for a base station to transmit a downlink signal in a wireless communication system, including the step of transmitting information related to a downlink subframe, wherein the information related to the downlink subframe is a subframe set for uplink transmission. | 03-12-2015 |
20150071209 | TTI BUNDLING METHOD IN WIRELESS ACCESS SYSTEMS AND APPARATUS FOR SAME - The present invention relates to a transmission time interval (TTI) bundling method in wireless access systems and to an apparatus for same. In particular, the TTI bundling method includes the following steps: a terminal receives information indicating the bundling size value from a base station; the terminal automatically re-transmits packets through a predetermined number of TTIs following four TTIs without the reception of Acknowledgement/Negative-ACK (ACK/NACK) information for the packets from the base station; the terminal receives the ACK/NACK information for the packets from the base station; and the terminal retransmits packets in a Hybrid Automatic Repeat and Request (HARQ) scheme when receiving the NACK, wherein the predetermined number of TTIs is determined according to the bundling size value. | 03-12-2015 |
20150071212 | METHOD AND DEVICE FOR TRANSMITTING D2D DATA IN WIRELESS COMMUNICATION SYSTEM - A method for transmitting device-to-device (D2D) data in a wireless communication system is provided. A first terminal establishes a D2D link with a second terminal. The first terminal transmits a scheduling request (SR) for an uplink and an SR for the D2D link to a base station. The first terminal receives, from the base station, scheduling information on the D2D link determined on the basis of the SR for the D2D link. The first terminal transmits D2D data to the second terminal on the basis of the scheduling information | 03-12-2015 |
20150078270 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND APPARATUS FOR SAME - Specifically, in one aspect of the present invention, a method and apparatus for controlling transmitting power by a terminal in a wireless communication system that supports device to device (D2D) communication include: receiving a power control command through a control channel from a base station; and adjusting transmitting power according to the power control command, wherein when the terminal performs D2D communication, the power control command indicates one of a first set of power control values having more states assigned to lower the transmitting power, and when the terminal performs communication with the base station, the power control command indicates one of a second set of power control values having more states assigned to raise the transmitting power. | 03-19-2015 |
20150078271 | METHOD AND APPARATUS FOR ESTIMATING CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. A method for estimating a channel by a user equipment (UE) in a wireless communication system includes receiving information about at least one channel station information (CSI) configuration for reporting CSI of one of a plurality of serving cells, determining that the same precoding matrix is applied to a plurality of resource blocks when all of the at least one CSI configuration is configured to report a precoding matrix indicator (PMI) and a rank indicator (RI), and determining that the precoding matrix is applied to one resource block when CSI configuration configured not to report the PMI and the RI is present among the at least one CSI configuration, and estimating a channel based on a result of the determination. | 03-19-2015 |
20150078272 | METHOD AND APPARATUS FOR RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM SUPPORTING COOPERATIVE TRANSMISSION - The present invention relates to a wireless communication system. A method for receiving data by a user equipment (UE) in a cooperative multi-point (CoMP) wireless communication system includes receiving information indicating a transmission base station (BS) that actually transmits data among a plurality of BSs that participate in CoMP, receiving information about zero-power channel state information-reference signal (CSI-RS) of each of the plural BSs, and assuming that data is not mapped to a resource element of zero-power CSI-RS corresponding to the transmission BS and receiving the data through a physical downlink control channel (PDSCH). | 03-19-2015 |
20150078275 | METHOD AND WIRELESS DEVICE FOR TRANSMITTING DATA PACKET - Provided are a method and a wireless device for transmitting a data packet in a wireless communication system. The wireless device engages in peer discovery with a receiver and monitors whether transmission (TX) scheduling information from a base station is received. A data packet is transmitted to the receiver on the basis of the TX scheduling information. The TX scheduling information comprises resource allocation information indicating resource allocation for transmitting the data packet, identification information indicating an identifier for the receiver; and information indicating whether the TX scheduling information is for TX scheduling or reception (RX) scheduling. | 03-19-2015 |
20150078277 | METHOD FOR TRANSCEIVING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method to receive an enhanced physical downlink control channel (EPDCCH) in a wireless communication system. More particularly, the method includes monitoring at least one EPDCCH candidate consisting of one or more enhanced control channel elements (ECCEs) in resource blocks and receiving the EPDCCH, wherein the number of ECCEs forming each of the one or more EPDCCH candidates corresponds to an aggregation level, the number of the EPDCCH candidates is set based on the number of ECCEs for each resource block and the number of resource blocks, and, when the number of resource blocks is a first value and the number of ECCEs for each resource block is a second value, the number of EPDCCH candidates in a specific aggregation level is set as a value obtained by dividing the total number of ECCEs by the specific aggregation level. | 03-19-2015 |
20150078284 | METHOD FOR REPORTING CHANNEL STATE, AND APPARATUS THEREFOR - According to one embodiment of the present invention, a method for reporting the channel state of an enhanced physical downlink control channel (EPDCCH) in a wireless communication system is disclosed, comprising the steps of: selecting N sub-bands from a set of sub-bands; and reporting a channel quality indicator (CQI) for the N sub-bands. At least one sub-band from among the N sub-bands (hereinafter, referred to as an EPDCCH SB) may be a sub-band including a pair of physical resource blocks (PRB) set as the EPDCCH. | 03-19-2015 |
20150078326 | METHOD FOR TRANSMITTING ENHANCED CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for transmitting a downlink control channel in a wireless communication system, and an apparatus therefor. Specifically, the method for transmitting an enhanced a physical downlink control channel (EPDCCH) from a serving cell comprises the steps of: forming a plurality of enhanced resource element groups (EREGs) by dividing available resource elements, comprised in one physical resource block (PRB) pair, into a predetermined number; forming an enhanced control channel element (ECCE), which is a resource allocation unit for the EPDCCH, by selecting one or more EREGs from among the plurality of EREGs; and transmitting the EPDCCH by means of the transmission resource allocated, for each ECCE, for the EPDCCH, wherein one or more EREGs forming the ECCE is selected on the basis of a cell identifier of the serving cell and/or an index of the one PRB pair. | 03-19-2015 |
20150085772 | METHOD FOR FORMING RESOURCE BLOCK FOR SEARCH REGION IN DISTRIBUTION-TYPE DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method for a terminal to receive an enhanced physical downlink control channel (EPDCCH) from a based station in a wireless communication system. More particularly, the method includes the steps of: defining a first number of enhanced resource element groups (EREGs) for each resource block for the EPDCCH; monitoring EPDCCH candidates consisting of one or more enhanced control channel elements (ECCEs) in resource blocks so as to receive the EPDCCH, wherein each of the one or more ECCEs consists of a second number of EREGs included in different resource blocks, and the indexes of the resource blocks including the second number of EREGs are determined on the basis of a specific value obtained by dividing the number of resource blocks by the second number. | 03-26-2015 |
20150085773 | METHOD FOR FORMING RESOURCE BLOCK FOR SEARCH REGION IN DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method for a terminal to receive an enhanced physical downlink control channel (EPDCCH) from a based station in a wireless communication system. More particularly, the method includes the steps of defining a first number of enhanced resource element groups (EREGs) for each resource block for the EPDCCH, and monitoring EPDCCH candidates consisting of one or more enhanced control channel elements (ECCEs) in resource blocks and receiving the EPDCCH, wherein each of the one or more ECCEs consists of a second number of EREGs, and indexes of the second number of EREGs are determined to be intervals of the number of ECCEs for each resource block. | 03-26-2015 |
20150085779 | METHOD FOR SETTING SEARCH REGIONS FOR DOWNLINK CONTROL CHANNELS IN WIRELESS COMMUNICATION SYSTEMS AND APPARATUS FOR SAME - The present invention relates to a method for transmitting an Enhanced Physical Downlink Control Channel (EPDCCH) from a based station to a terminal in a wireless communication system. In particular, the method includes the steps of: setting resource blocks for the EPDCCH; re-indexing by permutation indexes of the resource blocks; defining an Enhanced Control Channel Element (ECCE) for each of the re-indexed resource blocks; selecting the ECCEs in a number corresponding to the aggregation level of the EPDCCH; and transmitting the EPDCCH to the terminal using the selected ECCEs. | 03-26-2015 |
20150085782 | METHOD AND APPARATUS FOR MAKING HARQS IN CARRIER AGGREGATION SYSTEMS - The present invention relates to a method and system for making a hybrid automatic repeat requests (HARQ) in a carrier aggregation system. The method receives downlink data through a first subframe of a first carrier, transmits acknowledgement/negative-acknowledgement (ACK/NACK) for the downlink data through a second subframe of a second carrier, and re-receives the downlink data through a third subframe of the first carrier, wherein the first carrier only includes the downlink subframes, and the second carrier includes the uplink subframes and the downlink subframes. | 03-26-2015 |
20150085785 | DATA TRANSMISSION METHOD AND DATA TRANSMISSION DEVICE - A data transmission method and a data transmission device are disclosed. A method for receiving control data by a terminal can comprise the steps of demodulating downlink control information (DCI) including an assignment flag and downlink (DL) resource allocation; and demodulating physical downlink shared channel (PDSCH) data by using the DL resource allocation, wherein when the PDSCH data is demodulated on the basis of a demodulation reference signal (DM-RS), the assignment flag indicates information on a reference signal (RS) used for the demodulation of the PDSCH data or information on a PDSCH transmission antenna port. | 03-26-2015 |
20150085788 | METHOD FOR TRANSMITTING HARQ ACK/NACK AND WIRELESS DEVICE USING SAME - Provided are a method for transmitting hybrid automatic repeat request (HARQ) positive-acknowledgement (ACK)/negative-acknowledgement (NACK) in a wireless communication system and a wireless device using the same. The wireless device receives downlink control information from a first base station on a downlink control channel and receives a downlink transmission block on a downlink shared channel according to the downlink control information received from the first base station. The wireless device transmits ACK/NACK to a second base station in response to the downlink transmission block on an uplink control channel. The downlink control information includes an indicator used to determine a radio resource for the uplink control channel. | 03-26-2015 |
20150092629 | METHOD AND APPARATUS FOR PERFORMING HARQ BASED ON DYNAMIC CHANGE OF WIRELESS RESOURCES IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to transceive a signal through a base station and a predetermined carrier in a time division duplex (TDD) communication system. In detail, the method includes the steps of: receiving, from the base station, information on dynamically changeable uplink/downlink subframe settings; selecting a representative uplink/downlink subframe setting from among the uplink/downlink subframe settings; and performing a hybrid automatic repeat request (HARQ) operation according to the representative uplink/downlink subframe setting. | 04-02-2015 |
20150092690 | METHOD FOR SETTING SEARCH REGION FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method for a terminal to receive an enhanced physical downlink control channel (EPDCCH) from a based station in a wireless communication system. In detail, the method includes the step of: receiving the EPDCCH by monitoring EPDCCH candidates consisting of one or more enhanced control channel elements (ECCEs) in at least one resource block set for EPDCCH, wherein the number of ECCEs forming each of the EPDCCH candidates corresponds to an aggregation level, and the period between the EPDCCH candidates for one carrier, which is a specific aggregation level, is determined by dividing the total number of ECCEs included in each of the one or more resource blocks by a corresponding aggregation level and the number of the EPDCCH candidates which are the specific aggregation level. | 04-02-2015 |
20150092692 | METHOD FOR ALLOCATING UPLINK CONTROL CHANNEL FOR DOWNLINK DATA ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a method for transmitting a physical uplink control channel (PUCCH) in a wireless communication system and a device therefor. More specifically, the method for transmitting a PUCCH in a wireless communication system comprises the steps of: enabling a terminal to receive an enhanced physical downlink control channel (EPDCCH) having at least one enhanced control channel element (ECCE) from a base station; and transmitting a PUCCH corresponding to a physical data shared channel (PDSCH) scheduled by the EPDCCH to the base station, according to linkage information on the at least one ECCE, wherein the linkage information indicates a resource index of the physical uplink control channel corresponding to an index of the at least one ECCE according to an aggregation level with respect to the EPDCCH. | 04-02-2015 |
20150092717 | INTER-CELL INTERFERENCE COORDINATION IN A WIRELESS COMMUNICATION SYSTEM - A method and a first base station are described for setting measurement resources. Information about setting of a blank subframe of a second base station among a plurality of subframes is received. Resources are set in which a terminal will perform measurement using the information about setting of the blank subframe of the second base station. The information about setting of the blank subframe of the second base station includes a bitmap indicating blank subframes and non-blank subframes of the second base station. In addition, the resources in which the terminal will perform measurement are determined among the blank subframes indicated by the bitmap. | 04-02-2015 |
20150103683 | METHOD AND DEVICE FOR MEASURING INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method for measuring interference by a terminal in a wireless communication system and includes: receiving neighboring cell specific reference signal (CRS) information; performing CRS interference cancellation on the basis of the CRS information; and measuring interference by applying a correction value to the result of the CRS interference cancellation, wherein the correction value is set for each sub-frame set for limited measurement. | 04-16-2015 |
20150103731 | METHOD AND APPARATUS FOR SUBSET NETWORK CODING WITH MULTIPLE ANTENNAS BY RELAY NODE IN WIRELESS COMMUNICATION SYSTEM - A method for network coding by a relay node in a wireless communication system is disclosed. The method comprises: receiving an information associated with channel estimation from a base station, determining a number of subset for network coding based on the information associated with channel estimation, receiving at least one codeword from at least one user equipment, and generating re-encoded codeword by network coding based on the number of subset, wherein the number of subset is calculated based on a first outage probability and a second outage probability, and wherein the first outage probability is outage probability of the user Equipment to the base station, and the second outage probability is outage probability of the relay node to the base station. | 04-16-2015 |
20150103800 | INITIAL ACCESS METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a terminal's initial access method in a wireless communication system, the method including: obtaining information including a cell identification (ID) from a synchronous signal; and receiving any one of a first physical broadcast channel (PBCH) and a second PBCH channel depending on to which of a preset range the cell ID corresponds. | 04-16-2015 |
20150110017 | METHOD FOR TRANSMITTING OR RECEIVING ACK/NACK SIGNAL - Provided is a method for transmitting an ACK/NACK signal by a user equipment (UE) in a wireless communication system, comprising: detecting control channels in a downlink subframe of a radio frame, wherein ACK/NACK signal for the detected control channels is transmitted in an uplink resource region; determining whether uplink (UL) transmission (Tx) power control values received at respective one of the detected control channels are used as values indicating a resource region for transmission of the ACK/NACK signal, and transmitting the ACK/NACK signal in an uplink resource region decided according to the result of the determining; and if all UL Tx power control values received at the respective one of the detected control channels are not used to indicate the resource region for transmission of the ACK/NACK signal, transmitting the ACK/NACK signal in an uplink resource region linked to the respective one of the detected control channels. | 04-23-2015 |
20150110026 | METHOD FOR CONFIGURING RESOURCE BLOCK FOR SEARCH REGION OF DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method and apparatus for transmitting uplink data using a hybrid automatic repeat request (HARQ) by a terminal in a wireless communication system. More particularly, the method disclosed in the present invention comprises the steps of: establishing a first uplink-downlink configuration for a first frequency band and establishing a second uplink-downlink configuration for a second frequency band; receiving uplink control information in a downlink subframe on the first frequency band; and transmitting uplink data corresponding to the uplink control information in a specific uplink subframe linked to the downlink subframe on the basis of the first uplink-downlink configuration and second uplink-downlink configuration. | 04-23-2015 |
20150110038 | SCHEDULING METHOD FOR DEVICE-TO-DEVICE COMMUNICATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for performing a HARQ action and an apparatus for same, comprising the steps of: receiving from a base station resource allocation information which indicates a subframe set for D2D communication; receiving D2D data from a subframe #n from different user equipment; and receiving HARQ-ACK information with respect to the D2D data, wherein the HARQ-ACK information is transmitted from subframe #(n±k) when the subframe #(n+k) belongs to the subframe set for the D2D communication, and the HARQ-ACK is transmitted from a subframe that is closest to the subframe #(n+k) from among subframes belonging to the subframe set for the D2D communication after the subframe #(n+k), when the subframe #(n+k) does not belong to the subframe set for the D2D communication. | 04-23-2015 |
20150117291 | METHOD AND APPARATUS FOR RESOURCE MAPPING FOR PHYSICAL CHANNEL IN MULTIPLE CELL SYSTEM - The present invention relates to a wireless communication system. More particularly, provided is a method for determining a resource allocation scheme, related reference signals, transmission timing, transmission power, scrambling and the like for a physical channel so that a terminal can receive in an accurate and efficient manner the physical channel transmitted in a multiple cell environment. | 04-30-2015 |
20150117300 | METHOD FOR TRANSMITTING DOWNLINK SIGNAL AT A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting downlink signals at a source base station in a wireless communication system is disclosed. The method comprises transmitting a downlink signal to an end user and at least one relay; receiving a negative response signal from the end user; receiving a positive response signal and channel status information about a channel between the at least one relay and the end user, wherein the at least one relay overhears the negative response signal; and scheduling a specific relay having the best channel status of the at least one relay to re-transmitting the downlink signal to the end user. | 04-30-2015 |
20150117350 | METHOD AND USER DEVICE FOR RECEIVING DOWNLINK DATA, AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK DATA - The present invention enables an increase in data transmission performance by variously applying precoding to open and closed-loop MIMOs. An eNB in the present invention applies an identical precoder to neighboring PRBs scheduled in UE in the closed-loop MIMO, and applies an non-identical precoder to neighboring PRBs scheduled in UE in an open-loop MIMO. The UE variously introduces a precoder applied to neighboring PRBs scheduled in the UE according to whether the MIMO set in the UE is the closed-loop MIMO or the open-loop MIMO. | 04-30-2015 |
20150117355 | METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for feeding back Channel State Information (CSI) using a common subband at a user equipment in a wireless communication system is disclosed. The method includes transmitting first CSI to at least one base station at a first transmission time point according to a first CSI feedback configuration, and transmitting second CSI to the at least one base station at a second transmission time point according to a second CSI feedback configuration, wherein the second CSI is generated based on the common subband when the second transmission time point is within a prescribed SubFrame Threshold (SFT) from the first transmission time point. | 04-30-2015 |
20150117356 | METHOD AND APPARATUS FOR MONITORING DOWNLINK CONTROL CHANNEL - Provided are a method and an apparatus for monitoring a control channel in a wireless communication system. A wireless device receives indicative information for indicating a search space for a downlink control channel through an indication channel, and monitors the downlink control channel in the search space. The search space is defined by one or more pairs of physical resource blocks (PRBs). | 04-30-2015 |
20150124729 | METHOD FOR RECEIVING DOWNLINK CONTROL CHANNEL BY MEANS OF TERMINAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for receiving a downlink control channel by means of a terminal in a wireless communication system and to an apparatus for same. More specifically, the present invention relates to a method for detecting downlink control information by means of a terminal in a wireless communication system that supports carrier aggregation, the method comprising: a step of receiving resource region information for an enhanced physical downlink control channel (EPDCCH) from a base station; a step of constructing at least one resource block as a search space for EPDCCH monitoring based on the resource region information; and a step of monitoring the search space to detect downlink control information. The resource region information is a resource region configuration based on cells to be cross-carrier scheduled. | 05-07-2015 |
20150124732 | METHOD FOR RECEIVING DOWNLINK DATA, METHOD FOR TRANSMITTING DOWNLINK DATA TO USER EQUIPMENT, AND BASE STATION - The present invention provides a method and an apparatus for performing an open loop MIMO transmission based on a user equipment-specific reference signal (UE-RS), which is transmitted only for data that is allocated to a specific resource region, and provides a method and an apparatus for receiving the open loop MIMO transmission. | 05-07-2015 |
20150124737 | METHOD FOR CONTROLLING POWER FOR DEVICE-TO-DEVICE (D2D) COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - A method for a terminal controlling power in a wireless communication system, according to the present invention, comprises the steps of: receiving from a base station power setting information on the difference in power setting values between a first channel for eNodeB-to-device (eNB2D) communication, and a second channel for device-to-device (D2D) communication; and controlling the power of the first channel and/or the second channel in accordance with the power setting information, wherein the power is controlled in accordance with a predetermined priority, which is based on a plurality of channels and a plurality of transmitted data items, which are different from each other are simultaneously transmitted by the terminal at a specific time. | 05-07-2015 |
20150124759 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced control channel-based operation. A method for a base station for transmitting a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: determining one antenna port to be used for the downlink control channel; mapping the downlink control channel to a resource element on the basis of a reference signal for the one antenna port; and transmitting the mapped downlink control channel to a terminal, wherein an index for the one antenna port can be determined on the basis of a control channel element (CCE) index of the downlink control channel derived from the terminal identifier. | 05-07-2015 |
20150124760 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced-control channel-based operation. A method for a terminal for transmitting confirmation response information in a wireless communication system according to one embodiment of the present invention comprises a step for transmitting confirmation response information for a downlink data channel by means of an uplink control channel resource, wherein an index for the uplink control channel resource can be determined on the basis of a delegate antenna port of a downlink control channel derived from the identifier of the terminal. | 05-07-2015 |
20150131562 | HARQ ACK/NACK TRANSMISSION METHOD AND WIRELESS DEVICE - Provided are a method for transmitting a hybrid automatic repeat request (HARQ) positive-acknowledgement (ACK)/negative-acknowledgement (NACK) in a wireless communication system and a wireless device using the same. A resource of an uplink control channel used for the transmission of the HARQ ACK/NACK is determined according to the format of downlink control information. | 05-14-2015 |
20150131566 | SIGNAL TRANSMISSION/RECEPTION METHOD AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method by which a terminal receives a signal in a wireless communication system which supports device-to-device (D2D) communication and an apparatus therefor, the method comprising the steps of: receiving, from a base station, information about a second signal for D2D communication; receiving from the base station, information about a first signal which acts as an interference signal; receiving the second signal along with the first signal from a second terminal; and removing the first signal from the second signal by using the information about the first and the second signal, wherein the information about the second signal includes an indicator for indicating whether the second signal has the same format used in a 3GPP LTE system, and the information about the second signal further includes information about a parameter different from the one that is used in the 3GPP LTE system, if the second signal does not have the same format as used in the 3GPP LTE system. | 05-14-2015 |
20150131603 | METHOD AND APPARATUS FOR RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM SUPPORTING COOPERATIVE TRANSMISSION - The present invention relates to a wireless communication system. A method for receiving data by a user equipment (UE) in a cooperative multi-point (CoMP) wireless communication system includes receiving downlink control information (DCI) that does not contain information indicating a transmission base station (BS) that actually transmits data among a plurality of BSs that participate in CoMP, receiving information about zero-power channel state information-reference signal (CSI-RS) of each of the plural BSs, and assuming that data is not mapped to a resource element of zero-power CSI-RS with a lowest index and receiving the data through a physical downlink control channel (PDSCH). | 05-14-2015 |
20150133137 | METHOD FOR SHARING WIRELESS RESOURCE INFORMATION IN MULTI-CELL WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for sharing wireless resource information by a cell in a multi-cell wireless communication system. More particularly, the method for sharing wireless resource information by a cell according to the present invention comprises: a step of transmitting wireless resource information to a neighbor cell; and a step of receiving an acknowledgement message corresponding to the wireless resource information from the neighbor cell. The wireless resource information is information for changing the used of the wireless resource of a specific wireless resource region, and the acknowledgement message is a message indicating whether the change in use of the wireless resource is allowed in the neighbor cell. | 05-14-2015 |
20150139006 | METHOD AND APPARATUS FOR CARRYING OUT DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATIONS SYSTEM - Disclosed is a method by which a first device carries out device-to-device (D2D) communications in a wireless communications system, the method including the steps of: receiving discovery-related information from a third device; and receiving a discovery signal by using the discovery-related information, wherein the discovery-related information includes the kind of the reference signal used as the discovery signal and/or the information relating to the carrier frequency. | 05-21-2015 |
20150139093 | METHOD AND DEVICE FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention according to one embodiment relates to a method for enabling a terminal to receive control information in a wireless communication system, and the method for receiving the control information comprises the step of attempting to decode a set of enhanced physical downlink control channel (EPDCCH) candidates according to each set level, wherein a minimum value among the values available as the set levels is set according to the amount of available resources for an EPDCCH within a physical resource block (PRB) pair that is attempting to decode. | 05-21-2015 |
20150139104 | METHOD FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL CHANNELS IN WIRELESS COMMUNICATION SYSTEMS, AND APPARATUS FOR SAME - The present invention relates to a method for receiving a downlink signal by a terminal from a base station in a wireless communication system. In particular, the method includes the steps of: receiving an enhanced physical downlink control channel (EPDCCH) for the terminal from the base station; selecting a first EPDCCH physical resource block (PRB) pair or a second EPDCCH PRB pair on the basis of the effective size of a resource block group (RBG) allocated to the terminal and/or the system bandwidth; and receiving a physical downlink shared channel (PDSCH) on the basis of the EPDCCH form among the remaining PRB pairs excluding the selected EPDCCH PRB from among PRB pairs included in the RBG. | 05-21-2015 |
20150139109 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION THROUGH EPDCCH IN WIRELESS COMMUNICATION SYSTEM - The present invention according to one embodiment is a control information receiving method wherein the method enables a terminal to receive control information through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, and comprises the steps of: indexing resource elements (RE) included in a physical resource block (PRB) set of a received subframe, as ‘n’ enhanced resource element groups (EREG) per PRB pair; indexing the indexed EREG as ‘m’ enhanced control channel elements (ECCE) per PRB pair; and determining EPDCCH candidates constituting a specific search space for a terminal on the basis of the indexed ECCE and performing blind decoding, wherein the number of EREG per PRB pair, ‘n’ is determined by considering at least one among the available RE number in PRB pairs, a structure of the subframe, and a type of carrier. | 05-21-2015 |
20150139112 | METHOD FOR REPORTING CHANNEL STATE INFORMATION FOR THREE-DIMENSIONAL BEAM FORMING IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a channel state information reporting method for enabling a terminal to support a large-scale multiple-input multiple output (MIMO) in a wireless communication system. The method comprises the steps of: receiving, from a base station, first reference signal information corresponding to vertical antenna ports and second reference signal information corresponding to horizontal antenna ports: transmitting, to the base station, information related to a specific antenna port from among the vertical antenna ports using the first reference signal information; and transmitting, to the base station, horizontal channel state information using the second reference signal information. | 05-21-2015 |
20150139135 | METHOD FOR ALLOCATING RESOURCES IN A WIRELESS COMMUNICATION SYSTEM AND A DEVICE FOR THE SAME - A method of transmitting a Relay Physical Downlink Control Channel (R-PDCCH) at a base station in a wireless communication system. A set of Virtual Resource Blocks (VRBs) are assigned for the R-PDCCH to a downlink subframe. The downlink subframe is transmitted to a relay node. The set of VRBs is configured to be same, by higher layer, in a first slot and a second slot of the downlink subframe. If the set of VRBs for the R-PDCCH is assigned in the first slot of the downlink subframe, the R-PDCCH is configured to contain a downlink assignment. If the set of VRBs for the R-PDCCH is assigned in the second slot of the downlink subframe, the R-PDCCH is configured to contain an uplink grant. | 05-21-2015 |
20150139141 | METHOD AND APPARATUS FOR REDUCING INTER-CELL INTERFERENCE IN RADIO COMMUNICATION SYSTEM - A method of a first cell for supporting a downlink channel demodulation at a user equipment. The method according to one embodiment includes transmitting, by the first cell to the user equipment, information on a Cell-specific Reference Signal (CRS) of a second cell including at least one CRS antenna port count information of the second cell or Multicast/Broadcast over Single Frequency Network (MBSFN) subframe configuration information of the second cell; and transmitting, by the first cell to the user equipment, a downlink signal on the downlink channel. The information on the CRS of the second cell is used by the user equipment to demodulate the downlink channel. | 05-21-2015 |
20150139151 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and discloses a method and a device for transmitting/receiving a downlink reference signal in a wireless communication system. The present invention provides a way for maintaining orthogonality of a reference signal between cells in a multi-cell operation. | 05-21-2015 |
20150146639 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION THROUGH EPDCCH IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for a terminal receiving control information through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, comprising the steps of: indexing resource elements (RE), which are included in a physical resource block (PRB) set of a received subframe, in units of enhanced resource element groups (EREG); indexing the EREGs that are indexed in units of enhanced control channel elements (ECCE); and determining EPDCCH candidates which comprise a terminal-specific search space on the basis of the ECCEs which are indexed, and then blind decoding same, wherein the terminal determines whether a predetermined resource unit for a common search space and the terminal-specific search space overlap. | 05-28-2015 |
20150146642 | METHOD AND DEVICE FOR RETRANSMITTING UPLINK DATA IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. Particularly, the present invention provides a method for enabling a user equipment (UE) to retransmit uplink data on the basis of a signal received through a physical hybrid ARQ indicator channel (PHICH) in a wireless communication system and a device for the same, and the method for retransmitting uplink data comprises the steps of: receiving, from a base station, an indication on whether or not to detect the PHICH; retransmitting the uplink data on the basis of a PHICH detection result if the received indication is to detect the PHICH; and retransmitting the uplink data on the basis of an uplink grant received from the base station if the received indication is not to detect the PHICH. | 05-28-2015 |
20150146644 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for a terminal for receiving a downlink signal according to an embodiment of the present invention comprises a step of receiving a channel state information-reference signal (CSI-RS) on the basis of CSI-RS configuration information elements containing quasi co-location cell-specific reference signal (QCL CRS), wherein the terminal receives the CSI-RS by means of a QCL assumption on the basis of the QCL CRS information, and if the information contained in the QCL CRS information and the information known to the terminal corresponding to the information contained in the QCL CRS are not in agreement, then the information known to the terminal is applied preferentially. | 05-28-2015 |
20150146687 | METHOD AND DEVICE FOR PERFORMING DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - A method for performing device-to-device (D2D) communication in a wireless communication system is provided. A master user equipment sets a D2D link with a slave user equipment. The master user equipment performs D2D communication with the slave user equipment through the D2D link. The master user equipment receives handover information of the slave user equipment from the slave user equipment. The master user equipment transmits the handover information of the slave user equipment to an evolved NodeB of a handover source cell. | 05-28-2015 |
20150148030 | METHOD AND DEVICE FOR PERFORMING DIRECT COMMUNICATION BETWEEN TERMINALS IN WIRELESS COMMUNICATION SYSTEM - The present application discloses a method of performing, by a terminal, direct communication between terminals in a wireless communication system to which a carrier wave aggregating technique is applied. In particular, the method includes: reporting, to a base station, performance information on a terminal including information on a limited frequency band; and performing direct communication between the terminal and an opposite terminal through a specific frequency band, wherein if the specific frequency band is the same as the limited frequency band, signal reception from the base station when performing direct communication between the terminals is limited. | 05-28-2015 |
20150155928 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for transmitting channel state information (CSI) on a terminal having a plurality of cells allocated in a wireless communication system. The method includes the steps of: setting a plurality of cells as a plurality of groups, at least one of the groups including a plurality of cells; determining a priority for each of the groups; and transmitting multiple pieces of CSI for a top priority group having a highest priority from among the groups on the basis of the priority, wherein, when the top priority group includes two or more cells, the CSI includes each piece of CSI on each of the two or more cells. | 06-04-2015 |
20150155992 | METHOD AND APPARATUS FOR PROVIDING CHANNEL STATE INFORMATION-REFERENCE SIGNAL (CSI-RS) CONFIGURATION INFORMATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method for transmitting a Channel State Information-Reference Signal (CSI-RS) from a base station supporting multiple transmit antennas to a mobile station. The method according to one embodiment includes transmitting, at the base station, information of one or more CSI-RS configurations to the mobile station; and transmitting, at the base station, at least one downlink subframe mapped with the CSI-RSs to the mobile station. The one or more CSI-RS configurations include i) at least one CSI-RS configuration for which the mobile station assumes non-zero transmission power for the CSI-RS, ii) at least one CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS, or iii) at least one CSI-RS configuration for which the mobile station assumes non-zero transmission power for the CSI-RS and at least one CSI-RS configuration for which the mobile station assumes zero transmission power for the CSI-RS. | 06-04-2015 |
20150156751 | METHOD FOR TRANSCEIVING SIGNAL VIA INTERFERENCE MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM WITH COOPERATIVE BASE STATIONS, AND APPARATUS THEREFOR - Disclosed is a method for a first base station for transmitting a signal to a terminal in a wireless communication system. The method comprises the steps of: receiving, from a second base station, information related to a plurality of interference measurement resources; applying beamformings corresponding to the plurality of interference measurement resources; transmitting, to the terminal, information that downlink data signal does not get mapped in the plurality of interference measurement resources; and transmitting a downlink signal independent of the beamformings to the terminal from a resource domain which excludes the plurality of interference measurement resources. | 06-04-2015 |
20150162966 | METHOD AND DEVICE FOR REPORTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method of reporting channel state information (CSI) on a terminal in which a plurality of CSI processes are configured in a wireless communication system according to an embodiment of the present invention includes: measuring a channel based on a CSI reference signal (RS) resource related to one of the CSI processes; measuring interference based on a CSI-interference measurement (IM) resource related to the CSI process; determining CSI based on the measured channel and the measured interference; and reporting the CSI through an uplink channel, wherein a codebook for reporting the CSI, which is used for determining the CSI, is one of two or more codebooks that correspond independently to each of the CSI processes. | 06-11-2015 |
20150163037 | METHOD FOR DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - Disclosed is a method for a device, communicating device-to-device, for receiving a signal in a wireless communication system. Specifically, the method comprises the steps of: receiving, from another device, a signal via device-to-device communication during a first sub-frame; and receiving, from a base station, a signal during a second sub-frame, wherein the signal is received via device-to-device communication when the first sub-frame and the second sub-frame overlap. | 06-11-2015 |
20150163687 | METHOD FOR PERFORMING MEASUREMENT OF TERMINAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for enabling a terminal to perform a measurement in a wireless communication system. More specifically, the present invention comprises the steps of: receiving information related to a specific cell group as a measuring target; determining a representative value by performing the measurement for the specific cell group according to the received information; and performing radio resource management or radio link monitoring on the basis of the representative value, wherein the specific cell group is configured to enable a virtual cell identifier to comprise a plurality of equally set cells. | 06-11-2015 |
20150163729 | METHOD FOR TRANSMITTING TERMINAL DETECTION SIGNAL FOR DIRECT COMMUNICATION BETWEEN TERMINALS IN WIRELESS COMMUNICATION SYSTEM, AND DEVICE THEREFOR - The present specification discloses a method for enabling a terminal to transmit and receive a discovery signal for direct communication between terminals in a wireless communication system. Particularly, the method for enabling a terminal to transmit and receive a discovery signal for direct communication between terminals in a wireless communication system comprises the steps of: transmitting the discovery signal in a first sub-time unit included in a first time unit; and transmitting the discovery signal in a second sub-time unit included in a second time unit, wherein the time unit has a plurality of sub-time units, and an index of the second sub-time unit is shifted up to a sub-time unit of predetermined size in the first sub-time unit. | 06-11-2015 |
20150163790 | METHOD FOR TRANSMITTING CONTROL SIGNAL FOR DEVICE-TO-DEVICE COMMUNICATION AND DEVICE THEREFOR - One embodiment of the present invention discloses a method for transmitting a control signal for device-to-device (D2D) communication with a second terminal by a first terminal in a wireless communication system, wherein the method is carried out by the first terminal and comprises the steps of: mapping control information for the D2D communication to a resource region for the D2D communication; and transmitting, to the second terminal, the mapped control information for the D2D communication with data for the D2D communication, wherein the control information for the D2D communication includes modulation and coding scheme (MCS) related information and hybrid automatic retransmission request (HARQ) related information, and the control information for the D2D communication can be mapped to at least one symbol except for symbol(s) to which a reference signal is mapped. | 06-11-2015 |
20150180616 | METHOD FOR OPERATING BUFFER FOR DEVICE-TO-DEVICE (D2D) COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - A method for a terminal transmitting/receiving a signal with device-to-device (D2D) on the basis of a hybrid automatic repeat and request (HARQ) in a wireless communication system, comprises the steps of: receiving allocation information for establishing a wireless resource for a specific HARQ process from at least one first HARQ process as a wireless resource for a second HARQ process; and transmitting/receiving the signal with an external terminal by using the wireless resource of the second HARQ process, wherein a soft buffer, which is linked to the second HARQ process, is a reestablished soft buffer that is linked to the at least one HARQ process, in accordance with the allocation information. | 06-25-2015 |
20150180625 | METHOD FOR RECEIVING OR TRANSMITTING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - One embodiment of the present invention discloses a method for receiving a downlink signal in a wireless communication system that supports coordinated multiple-point transmission and reception (CoMP), and the method comprises the steps of: receiving downlink control information that contains a plurality of resource allocation parts from a base station; and acquiring information on whether it can be assumed that an antenna port(s) of a particular reference signal and an antenna port (s) of a demodulation reference signal associated with each of the plurality of resource allocation parts are quasi co-located (QCL). | 06-25-2015 |
20150180633 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING FLOODING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for transmitting and receiving a signal by a second UE in a wireless communication system, comprising the steps of: receiving a message from a first UE; and determining whether to participate in flooding of the received message, wherein if it is determined to participate in the flooding, the second UE transmits the received message a preset number of times through a preset resource region for a third UE, and a reference signal related to the message transmitted for the third UE is common to one or more UEs which have received the message from the first UE and participate in the flooding. | 06-25-2015 |
20150181366 | SYNCHRONIZATION METHOD AND SYNCHRONIZATION APPARATUS FOR D2D COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for achieving synchronization for the device-to-device (D2D) communication of a first terminal in a wireless communication system, comprising the steps of: calculating a time advance of a second terminal using the information relating to the transmission timing of a second transmission point, the downlink transmission timing of a first transmission point, timing the receipt of a downlink signal from the second transmission point; and receiving a signal from the second terminal using the timing advance of the second terminal. | 06-25-2015 |
20150181406 | USER EQUIPMENT DETECTION METHOD FOR DIRECT COMMUNICATION BETWEEN USER EQUIPMENT AND USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - Disclosed in the present application is a method for enabling user equipment to transmit and receive a discovery signal for direct communication between user equipment in a wireless communication system. Specifically, the method comprises the steps of: receiving, from a base station, information related to a plurality of configurations for the discovery signal through an upper layer; receiving, from the base station, downlink control information on a first sub-frame, comprising a field indicating one configuration among the plurality of configurations through a physical layer; and transmitting and receiving the discovery signal on the first frame and then on a second frame by using the indicated configuration. | 06-25-2015 |
20150181532 | METHOD FOR CONTROLLING DOWNLINK TRANSMISSION POWER AND APPARATUS FOR SAME - A method is described for performing power control by a first base station in a wireless communication system. A parameter value related with signal strength of a second base station is acquired. An upper power limit of the first base station is determined in consideration of the signal strength of the second base station. Signal transmission is performed in consideration of the upper power limit of the first base station. If a first condition(s) including that the parameter value is equal to or more than a first threshold value is satisfied, the upper power limit of the first base station is given as an intermediate value. If a second condition(s) including that the parameter value is less than the first threshold value is satisfied, the upper power limit of the first base station is given as a pre-determined value related with the transmit power of the first base station. | 06-25-2015 |
20150181568 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention is a method in which a terminal receives control information through an Enhanced Physical Downlink Control Channel (EPDCCH) in a wireless communication system, the method comprising a step of trying EPDCCH decoding for each of a plurality of EPDCCH Physical Resource Block (PRB) sets. The terminal determines an EPDCCH-mapped resource element using a parameter set for each EPDCCH PRB set for each of the plurality of EPDCCH PRB sets when trying the decoding. The parameter set includes a Cell-specific Reference Signal (CRS)-related parameter, a Channel State Information-Reference Signal (CSI-RS)-related parameter, and a Physical Downlink Control Channel (PDCCH)-related parameter. | 06-25-2015 |
20150181569 | METHOD AND APPARATUS FOR ACQUIRING DIVERSITY GAIN ACCORDING TO DISTRIBUTED RESOURCE ALLOCATION FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - In the present invention, disclosed is a method for a base station transmitting a downlink control channel to user equipment in a wireless communication system. More specifically, the method comprises the steps of configuring resource elements, which are included in each of a plurality of resource blocks, as a plurality of resource element groups comprising a predetermined number of resource elements; allocating antenna ports to the resource elements which are included in each of the plurality of resource element groups; allocating as a transmission resource for the downlink control channel, at least one resource element group from each of the plurality of resource blocks; and transmitting the downlink control channel to the user equipment by using the transmission resource. | 06-25-2015 |
20150181574 | METHOD AND DEVICE FOR RECEIVING DOWN-LINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method of detecting down-link control information by a terminal in a wireless communication system. More particularly, the present invention includes: receiving aggregation level related information for monitoring an enhanced physical downlink control channel (EPDCCH); and monitoring a search area for the EPDCCH according to a specific aggregation level to detect down-link control information, wherein for the specific aggregation level, the number of EPDCCH candidates for detecting the down-link control information is differently defined according to the aggregation level related information. | 06-25-2015 |
20150181581 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication and, more specifically, to a method for transmitting an HARQ) response by a UE in a wireless communication system, and an apparatus for the same. The method includes receiving an E-PDCCH signal on at least one of a plurality of enhanced physical downlink control channel (E-PDCCH) sets, each E-PDCCH set including a plurality of resources units indexed per E-PDCCH set; and transmitting the HARQ response using a physical uplink control channel (PUCCH) resource determined using the index of the first resource unit among one or more resource units carrying the E-PDCCH signal, wherein the index of the first resource unit is determined on the basis of the E-PDCCH set having the lowest index among the plurality of E-PDCCH sets when specific conditions are satisfied. | 06-25-2015 |
20150181587 | SCHEDULING METHOD FOR DEVICE-TO-DEVICE COMMUNICATION AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for transmitting device-to-device (D2D) data and an apparatus therefor, the method comprising the steps of: receiving, from a base station, control information which includes a first resource allocation information item; transmitting, to a second terminal, a second physical downlink control channel (PDCCH) signal which includes a second resource allocation information item, while including the resource indicated by the second resource allocation information item in the resource indicated by the first allocation information item; and transmitting the D2D data to the second terminal by using the resource indicated by the second resource allocation information item. | 06-25-2015 |
20150181624 | METHOD AND TERMINAL FOR RANDOM ACCESS TO SMALL CELL - The present invention relates to a method for random access to a small cell by means of a terminal. The method can include the steps of: receiving a plurality of settings for a random access preamble; selecting one of the plurality of settings; and transmitting the random access preamble according to the one selected setting. Here, a resource on which the random access preamble can be transmitted can be provided in plurality in one subframe, and the preamble transmitted on each resource is distinguishable. | 06-25-2015 |
20150189516 | METHOD FOR OPERATING SERVING CELL IN WIRELESS COMMUNICATION SYSTEM TO WHICH CARRIER AGGREGATION SCHEME IS APPLIED AND DEVICE FOR SAME - A method for operating a serving cell by a user equipment (UE) in a wireless communication system is disclosed. Specifically, the method comprises the steps of: forming a plurality of secondary cells (SCells), as one group, corresponding to a same frequency band through an upper layer; setting an enabled first SCell among the plurality of SCells as the serving cell and transmitting and receiving signals with a network; receiving a serving cell configuration message from the network to disable the first Scell and enable a second SCell; and setting the enabled second SCell as the serving cell and transmitting and receiving signals with the network. | 07-02-2015 |
20150189531 | METHOD AND DEVICE FOR MEASURING A DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM - A method of performing downlink measurement at a user equipment in a wireless communication system is described. Information indicating one or more subframes on which downlink measurement is to be performed is received from a base station. The downlink measurement is performed in the one or more subframes configured by the information. The one or more subframes are configured based on a subset of subframes with reduced activity of a neighbor base station which performs inter-cell interference coordination with the base station. | 07-02-2015 |
20150189629 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for enabling a terminal to receive a downlink signal through an enhanced physical downlink control channel (EPDCCH), comprising the steps of: decoding fallback downlink control information (DCI) format in an EPDCCH physical resource block set; and receiving a physical downlink shared channel (PDSCH) on the basis of the fallback DCI format, wherein the PDSCH transmission for receiving the PDSCH is determined according to whether the EPDCCH physical resource block set corresponds to localized EPDCCH transmission or distributed EPDCCH transmission. | 07-02-2015 |
20150189640 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for enabling user equipment to receive control information in a wireless communication system, comprising the steps of: receiving, from a first base station, first control information in which the control information is allocated on a specific wireless resource area according to a first pattern; and receiving from a second base station, second control information in which the control information is assigned on the specific wireless resource area according to a second pattern, wherein the first pattern is determined on the basis of identification information associated with the first base station, the second pattern is determined on the basis of identification information associated with the second base station, and the first and second patterns are set so as not to overlap each other. | 07-02-2015 |
20150195068 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for a terminal for receiving a downlink signal according to an embodiment of the present invention comprises the steps of: receiving, from a serving cell, a cell-specific reference signal (CRS) information for a neighboring cell; and receiving, from a serving cell and/or a neighboring cell, a physical downlink shared channel (PDSCH), wherein the CRS of the serving cell is invalidated if the terminal receives a PDSCH from the neighboring cell. | 07-09-2015 |
20150195823 | METHOD AND APPARATUS FOR ALLOCATING CONTROL CHANNEL FOR TRANSCEIVING DATA BETWEEN DEVICES IN WIRELESS ACCESS SYSTEM - Disclosed are a method and an apparatus for transceiving a control channel for performing device-to-device (D2D) communication in a wireless access system that supports D2D communication. More particularly, the method for transmitting a control channel by a transmitter side D2D communication device according to one embodiment of the present invention comprises: a step of allocating the resource region to be used in the D2D communication by a base station; and a step of transmitting the control channel to a receiver side D2D communication device through the control channel bandwidth which is a portion of the bandwidth of the allocated resource region. The time resource of the resource region may be a resource region to be allocated for transmission via the physical downlink shared channel (PDSCH) from the base station. | 07-09-2015 |
20150207600 | METHOD FOR REPORTING APERIODIC CHANNEL INFORMATION IN MULTI CELL-BASED WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present application discloses a method for enabling a terminal to report channel status information in a base station cooperative wireless communication system. Particularly, the method for enabling a terminal to report channel status information in a base station cooperative wireless communication system comprises the steps of: receiving, from a serving base station, first resource setting information for a channel status information-reference signal (CSI-RS) and second resource setting information for measuring interference: receiving a triggering signal for reporting the channel status information from the serving base station; calculating the channel status information on the serving base station and/or one or more cooperative base stations by using the first resource setting information and the second resource setting information; and reporting the channel status information to the serving base station, wherein the first resource setting information and the second resource setting information include information on an antenna port capable of referring to a large scale property of a wireless channel. | 07-23-2015 |
20150208290 | METHOD AND APPARATUS FOR PERFORMING HANDOVER IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to perform a handover in a wireless communication system, including the steps of: receiving a handover instruction from a serving cell; and performing a random access procedure for a target cell according to the handover instruction, wherein, when interference adjustment is performed on the serving cell and the target cell, system information for the target cell is obtained from the serving cell. | 07-23-2015 |
20150208392 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING DOWNLINK SIGNAL CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for transmitting or receiving a downlink signal considering an antenna port relationship. The method for enabling a terminal to receive a physical downlink sharing channel (PDSCH) signal in the wireless communication system according to one embodiment of the present invention can determine a PDSCH start symbol index according to the predetermined priority and receive the PDSCH signal therethrough. The PDSCH start symbol index can be determined when a PDSCH start symbol value included in a PDSCH resource element mapping and Quasi co-location Indicator (PQI) parameter set is determined by an upper layer. The PDSCH start symbol index can be determined according to the PDSCH start symbol value for a cell receiving the PDSCH when the PDSCH start symbol value included in the PQI parameter set is not determined by the upper layer. | 07-23-2015 |
20150208394 | METHOD FOR DETECTING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a wireless communication system, and more particularly, to a method for detecting a downlink control channel in a wireless communication system and to an apparatus for same. The method by which a terminal receives downlink control information in a wireless communication system, according to one example of the present invention, includes the steps of: receiving information elements, including information for setting a plurality of downlink subframe sets and information for representing a downlink control channel type for each of the plurality of downlink subframe sets, from a base station; determining the resource location to which the control is mapped in a specific downlink subframe set according to the type of the control channel; and monitoring a control channel corresponding to the control channel type at the resource location of the downlink subframe belonging to the specific downlink subframe set and receiving the downlink control information transmitted through the control channel. | 07-23-2015 |
20150208424 | METHOD FOR TRANSMITTING AND RECEIVING UPLINK SIGNAL ON BASIS OF INTERFERENCE MEASUREMENT IN BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - Disclosed is a method for enabling a specific reception point to receive an uplink signal from a terminal on the basis of interference control in a base station cooperative wireless communication system. Particularly, the method comprises the steps of: receiving, from an adjacent reception point, information regarding one or more resource groups for which the occurrence of the same interference is assumed; measuring, in a first resource belonging to the one or more resource groups, interference occurring from another uplink signal transmitted to the adjacent reception point; transmitting, to the terminal, scheduling information of an uplink signal in a second resource belonging to the one or more resource groups such that the measured interference is minimized; and receiving the uplink signal from the terminal in the second resource. | 07-23-2015 |
20150215087 | METHOD AND APPARATUS FOR RECEIVING OR TRANSMITTING RADIO FREQUENCY (RF) SIGNAL - A method and apparatus for receiving or transmitting a radio frequency (RF) signal are disclosed. A method for receiving a downlink signal by a user equipment (UE) in a Time Division Duplex (TDD) wireless communication system supporting Coordinated Multi-point transmission and reception (CoMP) includes: acquiring information of a time-resource region to which a downlink signal for the CoMP is transmitted, for at least one cell, and receiving a downlink signal for the CoMP signal for the CoMP on the basis of the acquired information, wherein the time-resource region information includes a length of a time region contained in a specific subframe to which the downlink signal for the CoMP is transmitted. | 07-30-2015 |
20150215905 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment decoding an enhanced physical downlink control channel (EPDCCH) in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining from a downlink subframe a reference element (RE) on which the EPDCCH is mapped; and decoding the EPDCCH based on the RE on which the EPDCCH is mapped. At least one EPDCCH-physical resource block (PRB)-set for monitoring the EPDCCH can be established for the user equipment, wherein a parameter set for each of the at least one EPDCCH-PRB-set is indicated by an upper layer, and the RE on which the EPDCCH is mapped can be determined based on the parameter set indicated by the upper layer. | 07-30-2015 |
20150215906 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment receiving a physical downlink shared channel (PDSCH) signal in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining a start symbol index of the PDSCH from a downlink subframe; and receiving the PDSCH signal based on the start symbol index, wherein the PDSCH can be scheduled by means of downlink control information (DCI) which is received through a physical downlink control channel (PDCCH) or an enhanced PDCCH (EPDCCH). When the DCI is comprised according to DCI format 1A, which is transmitted through the EPDDCH, and the downlink subframe is a non-multicast broadcast single frequency network (MBSFN) subframe, the start symbol index can be determined depending on an EPDCCH start symbol value which is established by an upper layer. | 07-30-2015 |
20150215908 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method of receiving a downlink signal through an enhanced physical downlink control channel (EPDCCH) by a terminal in a wireless communication system and includes: receiving a demodulation reference signal from a set of EPDCCH physical resource blocks (EPDCCH PRBs); and attempting to demodulate the EPDCCH by the set of EPDCCH PRBs with reference to the demodulation reference signal, wherein when a transmission mode set for the terminal is a preset transmission mode, the terminal assumes that a cell-specific reference signal of a serving cell is QCL (Quasi Co-Located) with the demodulation reference signal. | 07-30-2015 |
20150223208 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment receiving a physical downlink shared channel (PDSCH) signal in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining a start symbol index of the PDSCH from the downlink subframe; and receiving the PDSCH signal based on the start symbol index. When the DCI is comprised according to DCI format 1A, and the downlink subframe is a multicast broadcast single frequency network (MBSFN) subframe, the start symbol index can be determined depending on a PDSCH start symbol value which is included in a PDSCH resource element mapping and Quasi co-location indicator (PQI) that is established by an upper layer. | 08-06-2015 |
20150223209 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for receiving control information through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, including the steps of: channel estimation in an EPDCCH related physical resource block (PRB) pair set; and, on the basis of the channel estimation, monitoring the EPDCCH in the PRB pair set, wherein, when the number of physical antennas of a transmission point transmitting the EPDCCH is 1, the terminal is assumed to identically precode allocated ports for the EPDCCH. | 08-06-2015 |
20150223211 | METHOD BY WHICH A TERMINAL RECEIVES ENHANCED DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method by which a terminal receives an enhanced downlink control channel in a wireless communication system, and to an apparatus for same. In detail, the method for detecting downlink control information includes the steps of receiving information about a specific subframe for an enhanced physical downlink control channel (EPDCCH), and monitoring the determined number of resource blocks according to available resource regions of the specific subframe in order to detect downlink control information, wherein, when the available resource region is restricted, the number of resource blocks is increased. | 08-06-2015 |
20150223215 | METHOD FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - A method for receiving downlink channels at a user equipment in a wireless communication system. The method according to one embodiment includes monitoring a downlink control channel in a subframe including a plurality of symbols from the base station; and decoding a downlink data channel in the subframe according to the downlink control channel. If a parameter on a starting symbol of the downlink control channel within the plurality of symbols is configured via Radio Resource Control (RRC) layer signaling, the starting symbol of the downlink control channel is determined according to the parameter, otherwise, the starting symbol of the downlink control channel is determined according to a control format indicator. | 08-06-2015 |
20150223233 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING SIGNAL BY TERMINAL IN WIRELESS COMMUNICATION SYSTEM TO WHICH CARRIER AGGREGATION TECHNIQUE IS APPLIED - The present application discloses a method of transmitting and receiving a signal by a terminal over a network in a wireless communication system. In particular, the method includes: receiving a downlink signal from the network through a downlink cell and transmitting an uplink signal to the network through a first uplink cell; receiving a specific message for changing an uplink cell from the network; and changing an uplink cell to a second uplink cell according to the specific message and transmitting the uplink signal to the network through the second uplink cell, wherein when changing the uplink cell, the downlink cell is maintained. | 08-06-2015 |
20150229371 | METHOD FOR TRANSMITTING EFFICIENT FEEDBACK IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for transmitting a signal of a transmitting side in a wireless communication system that supports multiple antennas. More particularly, the method comprises the steps of: receiving, from a receiving side, feedback information for transmitting the signal of the transmitting side; and transmitting a signal to which a precoding matrix (W) is applied on the basis of the feedback information, wherein the precoding matrix (W) is expressed as a multiplication of two precoding matrices (W | 08-13-2015 |
20150229451 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment receiving a physical downlink shared channel (PDSCH) signal in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining from the downlink subframe a resource element (RE) on which the PDSCH is mapped; and receiving the PDSCH signal based on the RE on which the PDSCH is mapped, wherein when the DCI is comprised according to DCI format 1A and the downlink subframe is a multicast broadcast single frequency network (MBSFN) subframe, the RE on which the PDSCH is mapped can be determined depending on cell-specific reference signal (CRS) location information, which is included in a PDSCH resource element mapping and Quasi co-location indicator (PQI) parameter set that is established by an upper layer. | 08-13-2015 |
20150229455 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention is a method in which a terminal transmits an acknowledgement of reception performed through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, the method comprising the steps of: decoding the EPDCCH in both a first EPDCCH physical resource block (PRB) set and a second EPDCCH PRB set; and transmitting an acknowledgement of reception performed through each EPDCCH. The resource indices for transmitting an acknowledgement of reception performed through each EPDCCH are determined in mutually different manner based on the type of the EPDCCH PRB set, whether or not the number of the PRB pairs contained in each EPDCCH PRB set corresponds to each other, and/or whether or not the EPDCCH PRB sets overlap. | 08-13-2015 |
20150230210 | METHOD FOR RECEIVING DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - The present invention relates to a method by which a terminal receives downlink control information in a wireless communication system and, more specifically, the method comprises the step of receiving a specific reference signal (RS) in a common search space (CSS) of an enhanced physical downlink control channel (EPDCCH), wherein the specific reference signal is punctured and transmitted when a position allocated to a first terminal in an initial access procedure cannot be commonly applied to a second terminal. | 08-13-2015 |
20150230211 | METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE; AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION - In the present invention, a demodulation reference signal is transmitted using a plurality of settings in which demodulation reference signals occupy different positions in at least a density or time-frequency resource region of the demodulation reference signals. A base station can transmit, to the user device, information indicating a setting related to a downlink signal or a setting related to an uplink signal from among the plurality of settings, and the user device can receive the demodulation reference signal with the downlink signal or transmit the demodulation reference signal With the uplink signal according to the indicated setting. | 08-13-2015 |
20150230213 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a downlink signal at a base station in a wireless communication system includes generating a user equipment (UE)-specific reference signal sequence and mapping the generated sequence to resource elements (REs) predetermined according to antenna port groups. The REs for each antenna port group are divided on a frequency axis, on predetermined orthogonal frequency division multiplexing (OFDM) symbols of each slot, and the number of antenna port groups if the number of layers for transmitting the downlink signal is greater than 8 is twice the number of antenna port groups if the number of layers for transmitting the downlink data is equal to or less than 8. | 08-13-2015 |
20150236773 | EFFICIENT FEEDBACK TRANSMISSION METHOD IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - The present invention relates to a method for feeding back channel state information with respect to downlink transmission of a terminal in a wireless communication system supporting multiple antennas. Particularly, the method comprises the steps of measuring a channel with respect to downlink transmission; and transmitting a precoding matrix indicator (PMI) to which a precoding matrix for multiple antennas is applied, on the basis of the channel measuring result, wherein the multiple antennas are defined as a group of N antenna (N>0, N is an integer), and the precoding matrix for multiple antennas is determined by a precoding matrix for the group of N antennas and a phase coefficient matrix with respect to the precoding matrix for the group of N antennas. | 08-20-2015 |
20150236825 | METHOD AND APPARATUS FOR MEASURING CHANNEL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for performing channel measurement in a wireless communication system are disclosed. A method for performing channel measurement by a user equipment (UE) in a wireless communication system supporting carrier aggregation (CA) and coordinated Multi-point transmission and reception (CoMP) includes: receiving information on a channel state information—reference signal (CSI-RS) resource set (hereinafter referred to as CRMS (CoMP resource management set)) for measuring CSI-RS—based received power from serving evolved NodeB (eNB); measuring a received power for the CSI-RS resources contained in the CRMS; and transmitting the measured received power to the serving eNB, wherein the CRMS is independently configured for each of the plurality of component carriers (CCs) capable of being aggregated in the carrier aggregation (CA). | 08-20-2015 |
20150236828 | DOWNLINK SIGNAL TRANSCEIVING METHOD AND DEVICE, IN WIRELESS COMMUNICATION SYSTEM, TAKING INTO ACCOUNT ANTENNA PORT RELATIONSHIP - The present invention relates to a wireless communication system, and more particularly, to a downlink signal transmission and reception method and device taking into account antenna port relationship. A method for the reception of a physical downlink shared channel (PDSCH) signal by a terminal in a wireless communication system, according to one embodiment of the present invention, can comprise: a step for determining a start symbol index for the PDSCH in a downlink subframe; and a step for receiving the PDSCH signal on the basis of the start symbol index. The PDSCH start symbol index (k) when the downlink subframe belongs to a specific subframe set is determined according to k=min(KThreshold, K), KThreshold being a prescribed threshold, K being the PDSCH start symbol index when the downlink subframe does not belong to the specific subframe set, and min(KThreshold, K) being the minimum value among KThreshold and K. | 08-20-2015 |
20150236834 | METHOD FOR MAKING A TERMINAL SEND AN UPLINK ACK/NACK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM USING CARRIER AGGREGATION TECHNIQUES AND APPARATUS FOR THE SAME - The present application discloses a method for making a terminal send an uplink ACK (acknowledgement)/NACK (negative ACK) signal in a wireless communications system. Specifically, the method includes the steps of: receiving at least one downlink data signal from a network through at least one of a first and second cells; generating an ACK/NACK signal corresponding to the at least one downlink data signal; and sending the ACK/NACK signal through one of the first and the second cells, wherein the structure of the ACK/NACK signal is determined based on the number of the downlink data signals, and if the number of the downlink data signals is plural, the structure of the ACK/NACK signal is first type, and if receiving one downlink data signal through the first cell only or the second cell only, the structure of the ACK/NACK signal is second type. | 08-20-2015 |
20150236836 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK FOR DOWNLINK TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - A method for receiving ACK/NACK information transmitted in response to a downlink transmission. The method according to one embodiment includes transmitting one or more relay physical downlink control channels (R-PDCCHs); transmitting the downlink transmission according to the one or more R-PDCCHs in a downlink subframe set including M downlink subframes, where M is a positive integer; and receiving ACK/NACK information for the downlink transmission in the downlink subframe set. The downlink subframe set and the uplink subframe are configured for a time division duplex (TDD). The one or more R-PDCCHs are control channels different from a physical downlink control channel (PDCCH). N physical uplink control channel (PUCCH) resources respectively having indexes | 08-20-2015 |
20150237518 | METHOD AND DEVICE FOR ENABLING LIMITED MEASUREMENT IN FREQUENCY DOMAIN IN WIRELESS COMMUNICATION SYSTEM - The present application discloses a method of performing a measurement for radio resource management (RRM) by user equipment in a wireless communication system. In particular, the method includes: receiving information on the low-power frequency band of an adjacent cell for the RRM from a serving cell; performing a measurement on the low-power frequency band for the RRM using a reference signal received at a preset period; and reporting the result of the measurement to the serving cell. | 08-20-2015 |
20150237602 | METHOD AND APPARATUS FOR RECEIVING SYSTEM INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The method for receiving system information by a terminal in a wireless communication system according to one embodiment of the present invention comprises: a step of receiving a subframe; and a step of performing, for a physical broadcast channel (PBCH) in a predetermined resource region of the subframe, blind decoding based on a plurality of sequences to be masked to a CRC parity bit. If a cell-specific reference signal (CRS) does not exist in the subframe, each of the plurality of sequences indicates pieces of individual information contained in one or more of a reference signal type set, a demodulation reference signal (DMRS) antenna port information set and diversity scheme information set. | 08-20-2015 |
20150244510 | METHOD AND APPARATUS FOR TRANSMITTING ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - The method for transmitting an acknowledgement for enhanced physical downlink control channel (EPDCCH) by a terminal in a wireless communication system according to one embodiment of the present invention comprises: a step of receiving EPDCCH; and a step of determining a resource for transmitting the acknowledgement based on one or more of the values related to the enhanced control channel element (ECCE) index which is the lowest from among the indices of ECCEs used in the EPDCCH transmission, an antenna port index, and a predetermined value indicated by downlink control information. The transmitting acknowledgement method determines whether to use the predetermined value indicated by the downlink control information when the resource for transmitting the acknowledgement is determined, based on one or more of the transmitted EPDCCH type, the size of an DCI format, information related to the physical resource block (PRB) set of the transmitted EPDCCH, and the type of the signal transmitted on the PDSCH indicated by the EPDCCH. | 08-27-2015 |
20150245324 | METHOD FOR TRANSCEIVING CONTROL INFORMATION, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. In detail, provided are a method by which a terminal receives a control channel signal in a wireless communication system, and an apparatus for same, including the steps of: receiving a subframe including a plurality of control channel sets, wherein each control channel set includes a plurality of control channel candidates; and monitoring at least one control channel set in the subframe for receiving the control channel signal, wherein the plurality of control channel candidates are scrambled by a scrambling sequence having a control channel set-specific initialization value in each control channel set. | 08-27-2015 |
20150249517 | METHOD FOR RECEIVING SIGNAL USING INTERFERENCE REMOVAL SCHEME AND APPARATUS FOR SAME IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method by which a terminal receives a downlink signal from a base station in a wireless communication system. In detail, the method includes the steps of: receiving information about resource elements for interference channel estimation from an adjacent base station; estimating the interference channel from the adjacent base station using the resource elements for the interference channel estimation; and applying reception beam forming to avoid the interference channel and receive the downlink signal from the base station, wherein the downlink signal is not mapped to the resource elements for the interference channel estimation. | 09-03-2015 |
20150249973 | METHOD FOR RECEIVING OR TRANSMITTING DOWNLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND DEVICE FOR SAME - A method by which a user equipment receives a downlink control signal in a wireless communication system supporting carrier aggregation (CA) and coordinated multiple-point transmission and reception (CoMP), according to one embodiment of the present invention, comprises the steps of: receiving candidate sets of control information for the CA and the CoMP from a downlink serving base stations; and receiving an indicator for indicating one of the candidate sets from the downlink serving base station, wherein the candidate sets of the control information comprise a usable set of control information with respect to each carrier wave, and the control information can include information on carrier waves scheduled by the downlink serving base station, information on channel state information-reference signal antenna port(s) that is (are) quasi co-located (QCL) assumable with demodulation-reference signal antenna port(s) of the downlink serving base station, information on PDCH resource element (RE) mapping and/or information indicating whether or not QCL assumption between the channel state information-reference signal antenna port(s) and antenna port(s) indicated by the information on PDSCH RE mapping is possible. | 09-03-2015 |
20150249974 | METHOD AND APPARATUS FOR RECEIVING OR TRANSMITTING DOWNLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The method for receiving a downlink signal by a user device in a wireless communication system according to one embodiment of the present disclosure comprises: a step of receiving control information relating to semi persistent scheduling via an upper layer signaling or a downlink control channel; and a step of decoding a semi persistent scheduled downlink data channel based on the control information relating to semi persistent scheduling. The method may comprise: a step of using, if the downlink control information receive via the downlink control channel has a first downlink control information (DCI) format, a predetermined first parameter group from among the candidate parameter groups received via the upper layer signaling so as to decode the downlink data channel; and a step of using, if the downlink control information received via the downlink control channel has a second DCI format, a second parameter group indicated by the downlink control information from among the candidate parameter groups received via the upper layer signaling so as to decode the downlink data channel. | 09-03-2015 |
20150256306 | METHOD FOR SUPPORTING COMP IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - One embodiment of the present invention discloses a method by which a CoMP scheduling device determines a CoMP set in a wireless communication system that supports coordinated multiple-point transmission and reception (CoMP), the method comprising the steps of receiving, from at least one base station, information on a terminal served by the base station; determining a CoMP set on the basis of the received information on the terminal (s); and transmitting identification information of the terminal(s) included in the CoMP set to a base station(s) included in the CoMP set, wherein the information on the terminal can include the identification information of the terminal, capability, quality of service (QoS), a channel state value between the terminal and each base station around the terminal, and/or ePDCCH set configuration information of the terminal. | 09-10-2015 |
20150257130 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and device for receiving a downlink signal by a terminal in a wireless communication system. More particularly, the method includes: receiving first quasi co-location (QCL) characteristic-related information for the downlink communication of a first RF resource; and receiving a downlink signal by using a second RF resource, wherein the second RF resource indicates an RF resource when the use of an RF resource is changed from uplink communication use to downlink communication use at a specific time, and a downlink signal is decoded by using second QCL characteristic-related information for the downlink communication of the second RF resource, and the first QCL characteristic-related information and the second QCL characteristic-related information are independently defined. | 09-10-2015 |
20150264667 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus for receiving control information by a terminal in a wireless communication system. More particularly, the method for receiving control information by a terminal in a wireless communication system, comprises: a step of receiving monitoring information regarding a common search space (CSS) on an enhanced physical downlink control channel (EPDCCH): and a step of detecting control information based on the monitoring information. | 09-17-2015 |
20150271691 | METHOD FOR MONITORING DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - The present invention relates to a method for monitoring, by a terminal, an enhanced physical downlink control channel (EPDCCH) in a wireless communication system supporting carrier aggregation. In detail, the method includes the steps of receiving monitoring information about a first cell from a base station and a second cell cross-carrier scheduled from the first cell; and monitoring the EPDCCH on the basis of the monitoring information, wherein the monitoring information includes information that the number of EPDCCH candidates on the first cell is reallocated, when the maximum number of enhanced control channel elements (ECCE)) available in a specific EPDCCH set on the first cell does not support the number of the EPDCCH candidates of an aggregation level with respect to the second cell. | 09-24-2015 |
20150271788 | METHOD AND USER DEVICE FOR RECEIVING DOWNLINK SIGNAL, AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK SIGNAL - The present invention provides a method and a user device for receiving a downlink signal, and a method and a base station for transmitting a downlink signal. The method for a user device receiving the downlink signal in a wireless communication system, comprises: encoding downlink control channel candidates, each of which comprise at least one control channel element (CCE); and detecting the downlink control channel of the user device, wherein each of the downlink control channel candidates is encoded in accordance with a first downlink control information (DCI) format and a CCE type for the user device, or a second DCI format and a predetermined CCE type. | 09-24-2015 |
20150271790 | METHOD FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method and an apparatus for a terminal for receiving control information in a wireless communication system. More specifically, the method comprises a step for monitoring an enhanced physical downlink control channel (EPDCCH) set comprised in an EPDCCH, wherein an aggregation level for monitoring the EPDCCH set is determined according to the configuration regarding the EPDCCH set. | 09-24-2015 |
20150280882 | METHOD OF DETECTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method and apparatus for receiving, by a terminal, control information in a wireless communication system supporting a carrier aggregation system. In detail, the method includes a step of receiving control information on a specific subframe through a first carrier and second carrier, wherein, when the control channel type on the first carrier and the control channel type on the second carrier are different from each other in the specific subframe, the control information is received according to the control channel type on one carrier of either the first carrier or second carrier corresponding to predefined monitoring information. | 10-01-2015 |
20150282126 | METHOD FOR TRANSCEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for a terminal for receiving a downlink signal from a plurality of cells according to the semi-persistent scheduling (SPS) method in a wireless communication system. Specifically, the method comprises the steps of: receiving, in a first subframe, a first or second type scheduling information indicating an activation, according to the SPS method, from a serving cell from among the plurality of cells; and, in the first subframe and a second subframe configured via a higher layer after the first subframe, receiving the downlink signal from one cell from among the plurality of cells in accordance with resource allocation information comprised in the first or the second type scheduling information, wherein the first type scheduling information comprises quasi co-location (QCL) information for the serving cell and the one cell, and the QCL information applied in the first and second subframes is updated in accordance with the type of the scheduling information. | 10-01-2015 |
Patent application number | Description | Published |
20100054173 | RELAY STATION AND METHOD OF OPERATING THE SAME - A relay station and a method of operating a relay station are disclosed. The method includes decoding a received signal to restore the received signal into an information packet, and obtaining a first probability sequence representing probability information of respective information bits constituting the information packet, encoding the information packet to obtain a coded packet, and obtaining a second probability sequence representing probability information of respective coded bits constituting the coded packet by using the first probability sequence, and obtaining a modulated symbol by using the second probability sequence. | 03-04-2010 |
20100080269 | METHOD OF TRANSMITTING REFERENCE SIGNALS FOR COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND METHOD OF ALLOCATING RADIO RESOURCES FOR RELAY-BASED WIRELESS COMMUNICATION SYSTEM - A method of transmitting reference signals in a wireless communication system for cooperative communication is provided. The wireless communication system defines a plurality of transmission patterns of the reference signals each having a different pattern, and each of a plurality of base stations and/or each of a base station and a relay station participating in the cooperative communication transmit the reference signals based on one transmission pattern selected from the plurality of transmission patterns of the reference signals. | 04-01-2010 |
20100322180 | METHOD FOR TRANSMITTING SCHEDULING INFORMATION IN MOBILE COMMUNICATION SYSTEM AND FEMTOCELL BASE STATION APPARATUS USING THE SAME - A method for transmitting scheduling information in a mobile communication system and a femtocell base station apparatus using the same are provided. Scheduling information can be transmitted using a hierarchical scheduling scheme in which a femtocell base station is allocated resources from a macrocell base station and the femtocell base station then allocates resources to femto users within its own resource region. | 12-23-2010 |
20110211547 | METHOD OF TRANSMITTING DATA IN MULTI-CELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM - A method of transmitting data in a multi-cell cooperative wireless communication system is provided. The method includes splitting data to be transmitted into first data and second data, determining a first beamforming vector for the first data and a second beamforming vector for the second data, and transmitting the first data by using the first beamforming vector and the second data by using the second beamforming vector. The present invention provides a data transmission method which does not cause deterioration of overall system performance while minimizing inter-cell interference. | 09-01-2011 |
20110223927 | METHOD OF RELAYING DATA - A method of relaying data in a relay station of a wireless communication system based on a radio frame consisting of a plurality of downlink subframes and a plurality of uplink subframes is provided. The method includes receiving, from a base station, scheduling information comprising information regarding a transmission time for transmitting uplink data from the relay station to the base station, receiving the uplink data from a user equipment, and relaying, to the base station, the uplink data at the transmission time determined depending on the scheduling information. Accordingly, efficiency of radio resource usage can be increased in the wireless communication system employing the relay station. | 09-15-2011 |
20110223928 | METHOD AND APPARATUS OF SCHEDULING IN MULTI-CELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM - A method and an apparatus of scheduling in a multi-cell cooperative wireless communication system is provided. Scheduling is performed, and scheduling results are transmitted to a neighbor base station (BS). The scheduling results comprise certain information for scheduling to be sequentially performed among base stations. Inter-cell interference can be reduced and scheduling can be performed simply by exchanging signals without a central scheduler. | 09-15-2011 |
20110228709 | METHOD AND APPARATUS FOR RELAYING DATA IN WIRELESS COMMUNICATION SYSTEM BASED ON TDD - The present invention provides a method and an apparatus of relaying data in a wireless communication system based on Time Division Duplex (TDD). A relay station receives downlink data from a base station in an uplink subframe and relays the downlink data to at least one mobile station. Accordingly, the efficiency of resource allocation for a relay station can be improved. | 09-22-2011 |
20110235567 | APPARATUS AND METHOD FOR TRANSMITTING DATA USING MULTIPLE ANTENNAS - A data transmission apparatus having a plurality of antennas in a frequency division multiplexing system is provided. The apparatus includes a demultiplexer for splitting first-type data into plural pieces of sub-data, a first precoder for mapping the plural pieces of sub-data to the plurality of antennas by applying a first weight, a second precoder for mapping second-type data with an attribute different from the first-type data to the plurality of antennas by applying a second weight, and a transmit processor for transmitting the first-type data together with the second-type data through the plurality of antennas. Coverage can be expanded, and different types of services can be concurrently provided and system management can be achieved with increased flexibility and reliability. | 09-29-2011 |
20110235571 | METHOD AND APPARATUS OF TRANSMITTING BACKHAUL SIGNAL IN WIRELESS COMMUNICATION SYSTEM INCLUDING RELAY STATION - A method and apparatus of transmitting backhaul signals performed by a relay station in a wireless communication system is provided. A relay station performs scheduling with a base station in order to transmit the backhaul signals, and transmitting the backhaul signals to the base station using both resources for downlink transmission and resources for uplink transmission based on the scheduling. | 09-29-2011 |
20110250897 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal of a base station in a wireless communication system is provided. The method includes transmitting a first signal to the relay station through the transmission period in a subframe including a transmission period and a guard time for transmission/reception switching of a relay station, and transmitting a second signal to a macro user equipment through the guard time. Accordingly, a signal can be effectively transmitted in the wireless communication system employing the relay station. | 10-13-2011 |
20110267992 | METHOD FOR RELAYING DATA PERFORMED BY A RELAY STATION IN WIRELESS COMMUNICATION SYSTEM BASED ON TDD - A method of relaying data performed by a relay station in a wireless communication system based on time division duplex (TDD) is provided. The relay station receives downlink data from a base station and relays the downlink data to at least one mobile station in an uplink subframe which belongs to an unlinked subframe. Accordingly, uplink acknowledgement (ACK) collision can be avoided, and efficiency of resource allocation can be increased. | 11-03-2011 |
20110267993 | METHOD FOR RELAYING DATA IN WIRELESS COMMUNICATION SYSTEM BASED ON TIME DIVISION DUPLEX - A method of relaying data in a time division duplex (TDD)-based wireless communication system is provided. The method includes configuring a downlink subframe as a multicast/broadcast single frequency network (MBSFN) subframe, receiving downlink data in the MBSFN subframe; and relaying uplink data to a base station in an uplink subframe, wherein the downlink subframe is linked to the uplink subframe which is reserved to transmit an acknowledgement (ACK)/non-acknowledgement (NACK) signal for downlink data transmission in the downlink subframe. Accordingly, in the TDD-based wireless communication system, efficiency of resource allocation can be increased, and uplink ACK collision can be avoided. | 11-03-2011 |
20110267997 | SIGNAL TRANSMISSION METHOD USING MBSFN SUBFRAME IN RADIO COMMUNICATION SYSTEM - A signal transmission method using a multicast broadcast single frequency network (MBSFN) subframe in a radio communication system is provided. The method includes: selecting a plurality of relay stations for transmitting a plurality of backhaul signals, and transmitting the plurality of backhaul signals to the selected respective relay stations by using different radio resources, wherein each of the selected relay stations configures a subframe for receiving each of the plurality of backhaul signals as the MBSFN subframe. Accordingly, the backhaul signal can be transmitted between the base station and the plurality of relay stations by effectively using the radio resources. | 11-03-2011 |
20110299614 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL FROM RELAY STATION IN RADIO COMMUNICATION SYSTEM - A method for a transmitting and receiving a signal from a relay station in a radio communication system is provided. The method comprises the steps of: receiving offset time information from a base station; configuring a time difference between an access downlink transmission subframe that transmits an access downlink signal to a relay station terminal according to the offset time information and a backhaul downlink reception subframe that receives a backhaul downlink signal from the base station; transmitting a control signal from the access downlink transmission subframe to the relay station terminal; and receiving the backhaul downlink signal from the base station in the backhaul downlink reception subframe. | 12-08-2011 |
20110310778 | METHOD AND APPARATUS FOR RELAYING DATA IN WIRELESS COMMUNICATION SYSTEM - A method of relaying data in a wireless communication system is provided. The method comprises: receiving data, transmitted over a first subframe from a base station, over a second subframe; and relaying the data to a user equipment over a third subframe which is placed after one or more subframes from the second subframe, wherein at least any one of the first and the second subframes is a non-detection subframe to which the user equipment does not attempt data detection. According to the present invention, the wireless communication system enables efficient data transmission between a base station and a relay station as compared to conventional subframe-configurated systems. Furthermore, the wireless communication system enables data transmission with improved wireless resource allocation efficiency | 12-22-2011 |
20110310821 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION - A method of transmitting uplink control information of a user equipment in a wireless communication system is provided. The method includes: receiving reserved resource information that indicates a radio resource capable of transmitting the uplink control information; receiving a block subframe indicator that indicates a radio resource for transmitting a signal from a relay station to a base station; comparing a transmission-reserved subframe indicated by the reserved resource information with a block subframe indicated by the block subframe indicator; and transmitting the uplink control information in the transmission-reserved subframe if the transmission-reserved subframe does not overlap with the block subframe. | 12-22-2011 |
20110319092 | METHOD AND APPARATUS OF TRANSMITTING DATA IN COORDINATED MULTI-CELL WIRELESS COMMUNICATION SYSTEM - A method and apparatus of transmitting data in a coordinated multi-cell wireless communication system is provided. A base station receives information about beam-forming vectors, aligned with a channel to a user equipment placed in a neighbor cell, and about nulling beam-forming vectors for the channel to the user equipment from the neighbor cell, determines a transmission beam-forming vector based on the information, and transmits data to the user equipment using the transmission beam-forming vector. | 12-29-2011 |
20120002593 | CONTROL SIGNAL TRANSMITTING METHOD AND APPARATUS IN RELAY STATION - A method of transmitting a control signal of a relay station is provided. The method includes: receiving a control signal and data from a base station in a first subframe; and transmitting an acknowledgement/negative acknowledgement (ACK/NACK) signal for the data to the base station in a second subframe, wherein a radio resource for transmitting the ACK/NACK signal is determined by a radio resource to which the control signal received in the first subframe is allocated and by a logical physical uplink control channel (PUCCH) index received by using a higher layer signal. | 01-05-2012 |
20120028665 | METHOD FOR SELECTING AN ADAPTIVE COMP SCHEME - Disclosed is a method for selecting an adaptive CoMP scheme for a user equipment. The user equipment selects a first CoMP set which can maximize a signal to interference-plus-noise ratio (SINR) from among CoMP sets while performing a first coordinate multi-point (CoMP) scheme. Then, the user equipment compares the current data transmission rate thereof and the required minimum data transmission rate thereof and the required minimum data transmission rate while performing the first CoMP scheme and selecting the first CoMP set. Subsequently, the user equipment which performs the first CoMP scheme selects a second CoMP scheme on the basis of the result of the comparison in accordance with a predetermined sequence of CoMP schemes. | 02-02-2012 |
20120044857 | SIGNAL TRANSMISSION METHOD PERFORMED BY RELAY STATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - Disclosed is a signal transmission method performed by a relay station in a wireless communication system. The method comprises the steps of: arranging guard time within at least one symbol period in a subframe which is configured with multiple symbol periods in a time domain; and transmitting a control signal or data to a base station by using symbol periods except for the symbol periods which include the guard time in the subframe. The guard time is equal to or shorter than one symbol period. The structure in which the control signal or the data is arranged in each symbol period of the subframe is determined on the basis of the number of symbol periods except for the symbol periods which include the guard time. | 02-23-2012 |
20120069784 | METHOD AND APPARATUS FOR COOPERATIVE MULTIPLE POINT TRANSMISSION AND RECEPTION - A cooperative multiple point transmission and reception (CoMP) method of a user equipment (UE) receiving signals from a plurality of base stations (BSs) comprises receiving a first signal from a serving BS, receiving a second signal from an interfering BS, and restoring data, included in the first signal, using the second signal. The second signal comprises a downlink signal, transmitted from the interfering BS to a UE connected to the interfering BS, and a dummy signal for canceling interference of the downlink signal with the first signal. In a wireless communication system composed of multiple cells, CoMP using DPC can be performed even without data sharing between the cells. | 03-22-2012 |
20120069791 | METHOD AND APPARATUS FOR TRANSMITTING A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting a signal in a wireless communication system is provided. The method includes: allocating a radio resource for transmitting a signal; and transmitting the signal to a destination station by using the radio resource, wherein the radio resource includes a plurality of symbols in a time domain, at least two symbols among the plurality of symbols include a guard time for switching transmission and reception of a signal, and the radio resource includes a partial symbol which is a radio resource other than the guard time in the symbol including the guard time. | 03-22-2012 |
20120069794 | METHOD AND APPARATUS IN WHICH A RELAY STATION TRANSMITS A SOUNDING REFERENCE SIGNAL - Provided is a method for transmitting a sounding reference signal (SRS) of a relay station. The method includes: receiving SRS parameters; allocating a radio resource by using the SRS parameters; and transmitting the SRS to a base station by using the radio resource, wherein the radio resource indicated by the SRS parameters includes a symbol in which a guard time for switching signal transmission and reception is located in a time domain. | 03-22-2012 |
20120076071 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING A SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - A method of receiving a signal of a relay station in a wireless communication system is provided. The method includes: receiving backhaul resource allocation information from a base station; and receiving backhaul downlink data from the base station by using a radio resource indicated by the backhaul resource allocation information, wherein the radio resource includes a plurality of symbols in a time domain, and the plurality of symbols have boundaries which are shifted based on symbols included in a frequency band allocated to a macro user equipment, and wherein the radio resource includes a plurality of subcarriers in a frequency domain, and at least one subcarrier adjacent to the frequency band allocated to the macro user equipment among the plurality of subcarriers is set to a guard subcarrier in which the base station transmits no signal. | 03-29-2012 |
20120082149 | METHOD FOR TRANSMITTING FEEDBACK INFORMATION AND DATA USING A PRECODING CODEBOOK FOR MULTICELL COOPERATIVE COMMUNICATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed are a feedback-transmitting method and data-transmitting method, and a method for generating a codebook that can be used in a system such as LTE-A. When multiple base stations operate in a cooperative mode, using a codebook generated according to the present invention, an existing codebook for single cell transmission can be used to generate a codebook for cooperative transmission. | 04-05-2012 |
20120087332 | METHOD AND APPARATUS FOR TRANSMITTING INFORMATION ABOUT A CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for the feedback of channel information in a wireless communication system. User equipment transmits a recommended rank to a base station. The user equipment receives, from the base station, an indicating rank that has been determined in consideration of the recommended rank, and transmits a channel status determined on the basis of the indicating rank to the base station. | 04-12-2012 |
20120093082 | METHOD AND APPARATUS IN WHICH A RELAY STATION MAKES A HYBRID AUTOMATIC REPEAT REQUEST IN A MULTI-CARRIER SYSTEM - A method of performing a hybrid automatic repeat request (HARQ) of a relay station in a backhaul link of a multi-carrier system is provided. The method includes: receiving backhaul downlink data through at least one carrier between a first carrier and a second carrier; transmitting acknowledgement/not-acknowledgement (ACK/NACK) for the backhaul downlink data through an uplink component carrier; and receiving new backhaul downlink data or retransmitted backhaul downlink data in accordance with the transmitted ACK/NACK through at least one carrier between the first carrier and the second carrier, wherein the first carrier is a component carrier dedicated to the backhaul downlink between a base station and the relay station, and the second carrier is a component carrier used in both the backhaul downlink and an access downlink between the relay station and a relay user equipment at different times. | 04-19-2012 |
20120099519 | METHOD AND DEVICE FOR SIGNAL TRANSMISSION ON A WIRELESS COMMUNICATIONS SYSTEM - A method for signal transmission in a wireless communication system is provided. The method includes: transmitting backhaul resource allocation information by a base station to a relay node; decoding the backhaul resource allocation information by the relay node; and transmitting backhaul downlink control information and backhaul downlink data by the base station to the relay node, wherein a start position of a symbol for transmitting the backhaul downlink control information is fixed to a specific symbol of a backhaul link subframe, and the backhaul resource allocation information includes information on a radio resource for transmitting the backhaul downlink data. | 04-26-2012 |
20120134275 | APPARATUS AND METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmitting channel state information in a wireless communication system are disclosed. The UE apparatus for transmitting channel state information includes a channel state measurement module for measuring a channel state based on a level of interference received from a neighbor cell, a channel state information generation module for generating channel state information for a plurality of resource regions or for periodic and aperiodic channel state information reporting modes using the measured channel state and offsets received from a serving BS, the offsets being set for the plurality of resource regions or the periodic and aperiodic channel state information reporting modes, and a transmission module for transmitting the generated channel state information to the serving BS. | 05-31-2012 |
20120136912 | APPARATUS AND METHOD FOR GENERATING CODEBOOK IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for generating a codebook in a wireless communication system are disclosed. The codebook generation method includes determining one or more dominant singular vectors in a channel matrix for antennas and setting each of the dominant singular vectors as a random non-zero vector, generating a first codebook having codewords, a minimum distance between the code-words being maximized, using the random non-zero vector in a region that includes unit norm vectors each having a Euclidean distance to each of the dominant singular vectors, equal to or less than a predetermined value, generating a second codebook corresponding to a unitary matrix that rotates the random non-zero vector toward the dominant singular vectors, and generating a final codebook using the first and second codebooks. | 05-31-2012 |
20120140703 | RELAY STATION AND METHOD OF RELAY STATION TRANSMITTING BACKHAUL UPLINK SIGNAL - A method of a relay station transmitting a backhaul uplink (UL) signal includes receiving information about a structure of a subframe from a base station; allocating a reference signal and control information to the backhaul UL subframe on a basis of the information; and transmitting the reference signal and the control information. The reference signal or the control information is allocated to symbols other than a first symbol and last 2 symbols of the backhaul UL subframe. | 06-07-2012 |
20120147773 | APPARATUS AND METHOD FOR TRANSMITTING CHANNEL STATE INFORMATION IN A MOBILE COMMUNICATION SYSTEM - A apparatus and method for transmitting channel state information is disclosed. If an LTE-A system transmits a reference signal per subframe to support eight transmitting antennas, a problem occurs in that overhead is great. In order to solve this problem, a reference signal for channel measurement is transmitted per subband at different periods, or a user equipment scheduled for channel measurement uses a demodulation reference signal. The user equipment can notify a base station of channel measurement result using the demodulation reference signal in accordance with implicit or explicit signaling from the base station. | 06-14-2012 |
20120157140 | APPARATUS AND METHOD OF MULTI CELL COOPERATION IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method of multi cell cooperation is provided. The user equipment receives transmission beam forming information from a first cooperative cell, generates serving cell feedback information and cooperative cell feedback information on the basis of the transmission beam forming information, transmits the serving cell feedback information to a serving cell, and transmits the cooperative cell feedback information to a second cooperative cell. | 06-21-2012 |
20120170510 | METHOD AND APPARATUS FOR PERFORMING COMMUNICATION IN RELAY SYSTEM - The present invention relates to a method and apparatus for efficiently using a resource in a relay system. In detail, the present invention relates to a method for controlling an uplink signal transmission of user equipment in a wireless communication system, and to an apparatus for same. The method comprises the following steps: checking a cell-specific first SRS transmission subframe set; checking a relay-specific second SRS transmission subframe set; and allocating a resource for the uplink signal transmission. The uplink signal is transmitted to a relay via a backhaul subframe in the event the backhaul subframe falls within the first SRS transmission subframe set but does not fall within the second SRS transmission subframe set. The uplink signal transmission is dropped from the backhaul subframe in the event the backhaul subframe falls within the second SRS transmission subframe set. | 07-05-2012 |
20120176996 | APPARATUS AND METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION - The present invention is directed to a wireless communication system. Specifically, the present invention is directed to a method and apparatus for transmitting uplink control information through a Physical Uplink Shared Channel (PUSCH) at a user equipment, including receiving configuration information for periodic PUSCH transmission through a first protocol layer signaling, receiving information indicating activation or deactivation of the periodic PUSCH transmission through a second protocol layer signaling, wherein the second protocol layer is lower than the first protocol layer, and periodically transmitting the uplink control information through the PUSCH according to the configuration information if the periodic PUSCH transmission is activated. | 07-12-2012 |
20120178482 | METHOD AND APPARATUS FOR REDUCING INTER-CELL INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method including aligning a boundary of a downlink subframe from the first base station to a first user equipment with a boundary of a downlink subframe from a second base station to a second user equipment; acquiring timing advance information indicating a time by which a boundary of an uplink subframe from the first user equipment to the first base station advances compared to the aligned boundary of the downlink subframe; and notifying the first user equipment of a time point at which an uplink subframe is transmitted from the first user equipment to the first base station based on the acquired timing advance information, wherein the boundary of the uplink subframe from the notified first user equipment to the first base station is aligned with a boundary of an uplink subframe from the second user equipment to the second base station. | 07-12-2012 |
20120184206 | METHOD AND APPARATUS FOR REDUCING INTER-CELL INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and apparatus for reducing inter-cell interference in a wireless communication system. The method for reducing inter-cell interference in a wireless communication system according to one embodiment of the present invention includes: a step in which a first terminal receives, from a first cell, scheduling information for the transmission of a first signal to a second cell; and a step in which the first terminal transmits the first signal to the second cell on the basis of the scheduling information. The scheduling information is provided by the first cell in the event an uplink or downlink transmission of the first cell is interfered with by an uplink or downlink transmission of the second cell. The first signal indicates a request for reducing the transmitting power of the second cell or of the second terminal served by the second cell. | 07-19-2012 |
20120188976 | APPARATUS AND METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION - A wireless communication system is disclosed. A method and apparatus for allowing a user equipment (UE) to transmit uplink control information through a physical uplink shared channel (PUSCH) are disclosed. A method for allowing a UE to transmit uplink control information through a PUSCH in a wireless communication system includes receiving configuration information about a plurality of PUSCH feedback modes, identifying information indicating a specific PUSCH feedback mode for the PUSCH by using uplink allocation information for the PUSCH, and transmitting the uplink control information through the PUSCH in accordance with the specific PUSCH feedback mode. | 07-26-2012 |
20120189077 | METHOD AND APPARATUS FOR MODE SWITCHING BETWEEN A MULTI-CELL COORDINATED COMMUNICATION MODE AND A SINGLE-CELL MIMO COMMUNICATION MODE - A method for dynamically switching a communication mode includes generating and transmitting first feedback information in accordance with a first communication mode; switching the first communication mode into a second communication mode interlocked with the first communication mode; and generating and transmitting second feedback information in accordance with the second communication mode. The first communication mode is one of a multi-cell coordinated multi-point (CoMP) communication mode and a single-cell multi-input multi-output (MIMO) communication mode, and the second communication mode is the other of the multi-cell coordinated multi-point (CoMP) communication mode and the single-cell multi-input multi-output (MIMO) communication mode. The switching step can be performed without signaling from a base station. | 07-26-2012 |
20120201162 | METHOD AND APPARATUS FOR MITIGATING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of mitigating inter-cell interference in a wireless communication system are provided. A user equipment receives serving-cell data over a first data channel indicated by a first control channel for which decoding is successful by monitoring a plurality of candidate control channels in a search space of a serving cell. The user equipment receives interfering-cell data over a second data channel indicated by a second control channel for which decoding is successful by monitoring a plurality of candidate control channels in a search space of an interfering cell. The A user equipment cancels interference from the interfering cell by processing the serving-cell data and the interfering-cell data. | 08-09-2012 |
20120201191 | METHOD FOR TRANSMITTING AND RECEIVING SIGNAL OF RELAY IN RADIO COMMUNICATION SYSTEM SUPPORTING MULTIPLE CARRIERS - Disclosed herein is a radio communication system, and more particularly, to a method and apparatus for transmitting and receiving a signal on a backhaul link and an access link of a relay in a radio communication system supporting multiple carriers. The method for transmitting and receiving a signal in a relay node operating on multiple carriers includes receiving a control channel from a base station, determining the type of the control channel, determining an in-band operation mode or an out-band operation mode based on the determined type of the control channel, and transmitting and receiving the signal to at least one of the base station and a user equipment according to the determined operation mode. The multiple carriers include one or more in-band component carriers and one or more out-band component carriers. | 08-09-2012 |
20120201318 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL (RS) FOR DEMODULATION - An apparatus and method for transmitting and receiving a demodulation reference signal (DM RS) are disclosed. A method for controlling a base station (BS) to transmit a demodulation reference signal (Demodulation RS or DM RS) in a wireless communication system includes transmitting, by the base station (BS), a DM RS for a relay node (RN) to the relay node (RN) through a specific backhaul subframe to which an extended cyclic prefix (CP) is applied. The DM RS is transmitted over two resource elements (REs) of individual subcarriers having subcarrier frequency indexes 2, 5, 8 and 11 in a frequency axis within a second slot of the specific backhaul subframe. | 08-09-2012 |
20120202554 | DYNAMIC UPLINK POWER CONTROL METHOD AND DEVICE IN A WIRELESS COMMUNICATIONS SYSTEM - A wireless communications system and, more particularly, to a dynamic uplink power control method and device in a wireless communications system are disclosed. A method for dynamically controlling an uplink transmission power at a base station is provided, the method includes the steps of receiving an uplink signal from a user equipment being served by the base station, deciding whether or not an uplink transmission to the base station from the user equipment causes an interference with another base station, and transmitting a transmission power control (TPC) command muting the uplink transmission to the user equipment. | 08-09-2012 |
20120207084 | BACKHAUL DOWNLINK SIGNAL DECODING METHOD OF RELAY STATION AND RELAY STATION USING SAME - A method of decoding a backhaul downlink signal of a relay station is provided. The method includes: receiving by the relay station a transmission rank value for a backhaul downlink from a base station through a high-layer signal; receiving control information from the base station through a control region; and decoding the control information, wherein the transmission rank value for the backhaul downlink is a transmission rank value assumed when the relay station decodes the control information, and wherein the control information is mapped to a resource element which does not overlap with a dedicated reference signal resource element mapped to the control region by assuming the transmission rank value for the backhaul downlink. | 08-16-2012 |
20120213189 | METHOD FOR UPLINK TRANSMISSION CONTROL AND AN APPARATUS FOR THE SAME IN A WIRELESS COMMUNICATIONS SYSTEM - A wireless communications system and, more particularly, a method for uplink transmission control and an apparatus for the same in a wireless communications system are disclosed. In a method for performing uplink scheduling for a first user equipment by a first base station, the method includes the steps of receiving, from the first user equipment, information on a frequency band having an uplink interference occurring therein with respect to a second base station; and allocating an uplink resource for the first user equipment based upon the frequency band. Herein, the frequency band having an uplink interference occurring therein with respect to the second base station may be decided based upon uplink scheduling information on a second user equipment of the second base station, and the uplink scheduling information on the second user equipment of the second base station may be acquired by the first user equipment and transmitted to the first base station. | 08-23-2012 |
20120218968 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. In particular, the present invention relates to a method and apparatus for transmitting channel quality information using a terminal, wherein the method comprises the steps of: receiving CoMP configuration information from a serving transmission point; receiving a downlink signal from a plurality of transmission points; and transmitting channel quality information on one or more downlink sub-bands for each transmission point to the serving transmission point, wherein the plurality of transmission points select the same one or more downlink sub-bands in consideration of the CoMP configuration information. | 08-30-2012 |
20120258724 | METHOD AND APPARATUS FOR REMOVING INTER-HETEROGENEOUS CELL INTERFERENCE - Disclosed are a method and apparatus for removing inter-heterogeneous cell interference. A terminal apparatus for removing inter-heterogeneous cell interference comprises: a receiver which receives, from a first base station which is a serving base station, a signal for instructing that a request for interference coordination information required for inter-heterogeneous cell interference coordination be made to a second base station which is heterogeneous to the first base station; a transmitter which transmits, to the second base station, a predetermined physical random access channel (PRACH) preamble which notifies said request through a PRACH; a receiver which receives the interference coordination information from the second base station; and a transmitter which transmits the received interference coordination information to the first base station. | 10-11-2012 |
20120275411 | APPARATUS FOR PERFORMING COMP COMMUNICATION USING A PRECODED SOUNDING REFERENCE SIGNAL, AND METHOD FOR SAME - An apparatus for performing coordinated multiple point (CoMP) communication using a precoded sounding reference signal, and a method for same are discussed. The method according to an embodiment of the present invention includes: a base station receiving, from a terminal in a neighboring cell, a sounding reference signal (SRS) precoded by a first matrix; acquiring an effective neighboring channel matrix using a hermitian matrix of the first matrix from the received SRS, and a downstream link channel matrix between the terminal and base station; and determining a precoding matrix to be transmitted to one or more terminals served by the base station on the basis of the effective neighboring channel matrix. Here, the effective neighboring channel matrix indicates a direction toward which a receiving beam should be directed such that the terminal can receive data from a serving base station thereof. | 11-01-2012 |
20120287848 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for allocating backhaul resources to a relay in a wireless communication system, particularly a method and apparatus for processing a downlink signal at a relay in a wireless communication system are disclosed. The method includes receiving resource allocation information indicating a resource block set from a Base Station (BS) through higher layer signaling, receiving a downlink subframe, starting from a predetermined Orthogonal Frequency Division Multiplexing (OFDM) symbol, from the BS, monitoring the resource block set in the downlink subframe to receive a physical control channel, and performing an operation according to the received physical control channel. | 11-15-2012 |
20120287882 | METHOD AND APPARATUS FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL - The present invention relates to a method for transmitting a sounding reference signal and to an apparatus for said method. More particularly, the present invention relates to a method for transmitting a sounding reference signal and to an apparatus for said method, wherein the method comprising the following steps: receiving sounding reference signal parameters; allocating a wireless resource using the sounding reference signal parameters; and transmitting a sounding reference signal via the wireless resource, wherein said sounding reference signal is transmitted using a portion of a period of a single carrier-frequency division multiple access (SC-FDMA) symbol. | 11-15-2012 |
20120287900 | METHOD AND DEVICE FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL - The present invention provides a method and device for transmitting a sounding reference signal on a wireless communication system. More specifically, the present invention relates to an SRS transmission method comprising the steps of: receiving cell-specific parameters for constituting a SRS; receiving first terminal-specific parameters designating a resource which can be used in the non-periodic transmission of the SRS; receiving request information whereby SRS transmission is requested; and, after the request information has been received, transmitting the SRS by using the resource allocated by means of the first terminal-specific parameters; wherein the SRS is transmitted inside subframes designated by means of the cell-specific parameters, and the present invention also relates to a device for the same. | 11-15-2012 |
20120289267 | METHOD FOR INTERFERENCE ALIGNMENT IN WIRELESS NETWORK - A method for interference alignment in wireless network having 3 transmitters and 3 receivers which are equipped with M antennas is provided. The method comprising: transmitting, performed by each of the 3 transmitters, a pilot signal known to the 3 receivers; estimating, performed by each of the 3 receivers, each channel from transmitter; transmitting, performed by each of the 3 receivers, feedback information to target transmitter; and determining, performed by transmitter 2 and transmitter 3, a precoding vector; wherein a degree of freedom(DoF) of a transmitter 1 is (M/2−α), a DoF of the transmitter 2 or the transmitter 3 is M/2. | 11-15-2012 |
20120302280 | POWER CONTROL METHOD FOR INTERFERENCE ALIGNMENT IN WIRELESS NETWORK - A power control method for interference alignment in wireless network having K transmitters and K receivers is provided. The method comprising: receiving, performed by receiver n (n is an integer, 1≦n≦K−1), a power indication signal of transmitter n+1 from the transmitter n+1; determining, performed by the receiver n, power of transmitter n; and transmitting, performed by the receiver n, a power indication signal of transmitter n to the transmitter n, wherein the power of transmitter n is determined based on a residual interference of the receiver n, and the power indication signal of transmitter n indicates a minimum transmission power or a maximum transmission power of transmitter n. | 11-29-2012 |
20120307755 | ACK/NACK TRANSMISSION METHOD AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and an apparatus for transmitting ACK and NACK with a terminal set in a state of ACK/NACK repetition mode, and the method comprises the steps of: receiving first data through a first subframe; receiving second data through a second subframe; and transmitting an ACK/NACK signal for the second data, wherein the repetition frequency of the ACK/NACK signal for the second data is reduced if a difference between the first subframe and the second subframe is smaller than a reference value. | 12-06-2012 |
20120307929 | FEEDBACK METHOD FOR INTERFERENCE ALIGNMENT IN WIRELESS NETWORK - A feedback method for interference alignment in wireless network having K transmitters and K receivers is provides. The method comprising: transmitting, performed by transmitter n−1, a precoding vector of transmitter n−1 (n is a integer between 2 and K−1) to receiver n+1; calculating, performed by the receiver n+1, a precoding vector of transmitter n using the precoding vector of transmitter n−1; and transmitting, performed by the receiver n+1, the precoding vector of transmitter n to transmitter n. | 12-06-2012 |
20120314567 | METHOD AND APPARATUS OF RECOVERING BACKHAUL LINK FAILURE BETWEEN BASE STATION AND RELAY NODE - A method and apparatus for recovering a backhaul link failure between a base station and a relay node is provided. The relay node receives information on a plurality of relay subframes used for relaying signals between the base station and the relay node. When a backhaul link failure is detected, the relay node determines at least one reserved subframe except the plurality of relay subframes and receives information to recover the backhaul link failure on a control channel in the at least one reserved subframe. | 12-13-2012 |
20120320819 | RELAY NODE APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL ACCORDING TO LINK OPERATION MODE IN WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - A relay node (RN) apparatus for transmitting and receiving a signal according to a link mode in a wireless communication system and a method thereof are disclosed. A processor transmits or receives a signal to or from at least one of a base station and a terminal based on link mode information. At least one antenna receive the link mode information and transmit or receive the signal to or from at least one of the base station and the user equipment. The link mode information includes information a link mode in which the relay node apparatus will operate. | 12-20-2012 |
20120327801 | METHOD FOR PROCESSING DEGRADATION OF RADIO LINK QUALITY IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING RELAYS - A method and apparatus for processing degradation of radio link quality in a wireless communication system supporting relays are disclosed. The method includes determining quality of a radio link between the first node and the communication apparatus, recovering the radio link between the first node and the communication apparatus, when the quality of the radio link between the first node and the communication apparatus is decreased to or below a predetermined threshold, and transmitting to the second node a signaling to control communication on a radio link between the second node and the communication apparatus, when the quality of the radio link between the first node and the communication apparatus is decreased to or below the predetermined threshold. | 12-27-2012 |
20130010676 | METHOD OF TRANSCEIVING SIGNAL AT RELAY NODE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for allowing a relay node (RN) to transmit and receive in a wireless communication system is disclosed. A method for transmitting and receiving a signal at a relay node in a wireless communication system includes transmitting and receiving a relay-User Equipment (UE) link signal through an access subframe, switching a communication link from a relay-UE link to a relay-base station (BS) link during a predetermined time, and transmitting and receiving a relay?BS link signal through a backhaul subframe. A timing edge of the access subframe is located ahead of a timing edge of an uplink subframe of the backhaul subframe by an offset value. | 01-10-2013 |
20130010841 | METHOD AND APPARATUS FOR RELAYING SIGNAL IN WIRELESS NETWORK - Disclosed are a control method and a control device for implementing two-way communication in a wireless network. A repeater can measure a channel matrix, which indicates channel information of each of a plurality of nodes based on signals received simultaneously from the plurality of the nodes, and calculate a first basic lattice size, which initializes the lattice sizes of the received signals according to predefined rules. Then, the repeater uses the channel matrix of each of the nodes and the initialized first lattice size to calculate for each of the nodes a first normalization factor, which normalizes the sizes of the signals simultaneously received from each of the nodes, and a minimum normalized factor, which is equivalent to the minimum value of the first normalization factor. And then, the repeater calculates a second lattice size for each of the nodes using the first normalization factor, the minimum normalization factor, and the initialized first lattice size, which have been calculated for each of the nodes. Then, the repeater calculates a second normalization factor using the second lattice size and the channel matrix of each of the nodes. And then, the repeater transmits the new calculated lattice size and the normalization factor to each of the nodes. | 01-10-2013 |
20130028221 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SCHEDULING REQUEST USING SHARED RESOURCE BASED FILTERING IN RADIO COMMUNICATION SYSTEM - Disclosed herein is a method and apparatus for transmitting and receiving a scheduling request using a shared resource based filtering method in a radio communication system. The method for supporting scheduling request using shared resources at a base station including assigning each of one or more users to each of one or more subsets of Scheduling Request (SR) resources of a set consisting of a number, M, of SR resources, receiving scheduling request for the one or more users, determining SR resources used for the scheduling request among M SR resources, determining one or more users associated with the received scheduling request based on the assigned SR resources and the determined SR resources, and transmitting scheduling control information to determined one or more users. | 01-31-2013 |
20130044676 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNALS BETWEEN A BASE STATION AND A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting signals by a base station in a wireless communication system, the method comprising: resetting a start symbol index for a relay node dedicated downlink physical control channel and a relay node dedicated downlink physical common channel, respectively; transmitting a message including a parameter required for resetting the start symbol index to the relay node; setting the start symbol index to a preset value or a value that has been given prior to receiving the reestablishment message, in the case where the relay node has sent a specific number of NACKs for the relay node dedicated downlink physical control channel or the relay node dedicated downlink physical common channel; and transmitting the relay node dedicated downlink physical control channel and the relay node dedicated downlink physical common channel to the relay node, based on the start symbol index having been set. | 02-21-2013 |
20130051310 | METHOD FOR TRANSCEIVING SIGNALS BETWEEN A BASE STATION AND A RELAY NODE IN A MULTIUSER MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method in which a base station transmits signals to a relay node in a multiuser multi-antenna (MIMO) wireless communication system. More particularly, the method comprises the following steps: allocating one or more antenna ports to one or more relay nodes, respectively; mapping each of a plurality of downlink grant signals for said one or more relay nodes to a preset resource domain from among resource domains corresponding to one of the allocated antenna ports; mapping uplink grant signals or data signals for said one or more relay nodes to the resource domains corresponding to the allocated antenna ports; and transmitting the mapped signals to said one or more relay nodes. | 02-28-2013 |
20130064276 | USER EQUIPMENT APPARATUS AND METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A UE apparatus and method for feeding back Channel State Information (CSI) in a wireless communication system are disclosed. The UE apparatus includes a processor for determining a Rank Indicator (RI) for a predefined frequency band and selecting an index of a Precoding Matrix Indicator (PMI) corresponding to the determined RI from a codebook set used for a transmission on the predefined frequency band, and a transmission antenna for transmitting the RI and the index of the PMI to a Base Station (BS). The RI and the index of the PMI are jointly encoded prior to the transmission. | 03-14-2013 |
20130142111 | METHOD FOR TRANSMITTING A SIGNAL RELATED TO A CHANGE IN TRANSMISSION FORMAT - Provided is a method of transmitting a signal related to a change in a transmission format. In a wireless communication system which uses an orthogonal frequency division multiplexing (OFDM) symbol or a single carrier-frequency division multiple access (SC-FDMA) symbol, the method includes: transmitting, from a base station to a receiver, a radio resource control (RRC) message indicating that a first transmission format is changed to a second transmission format; and if an acknowledgement (ACK) message for the RRC message is not received, repetitively transmitting the RRC message, from the base station to the receiver, together with data based on the first transmission format or data based on the second transmission format, wherein the data based on the first transmission format and the data based on the second transmission format transmitted together with the RRC message are alternately selected. | 06-06-2013 |
20130163509 | METHOD FOR TRANSMITTING SIGNALS IN A COMMUNICATION SYSTEM INCLUDING A RELAY STATION - Provided is a method for transmitting signals in a relay station. In detail, the method for transmitting signals in a relay station of a wireless communication system using a plurality of subframes including a plurality of OFDM symbols or SC-FDMA symbols comprises the steps of: receiving bitmap information on a backhaul downlink subframe from the relay station; obtaining control information on a subframe that is not used for a backhaul downlink; and repeatedly transmitting channel state information to the relay station on the basis of a virtual index indicating only a backhaul uplink subframe, wherein the backhaul uplink subframe is determined according to the control information and the bitmap information. | 06-27-2013 |
20130343300 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA - A method and apparatus of transmitting and receiving data is provided. A method of a channel state information (CSI) feedback of a mobile terminal comprises receiving, by the mobile terminal, a CSI feedback configuration configuring a CSI feedback reporting to a base station without precoding matrix index (PMI) and rank index (RI), receiving, by the mobile terminal, a CSI configuration for a channel state information reference signal (CSI-RS), determining, by the mobile terminal, a physical downlink share channel (PDSCH) transmission scheme based on an antenna port of the CSI-RS, determining, by the mobile terminal, a CSI based on the PDSCH transmission scheme and transmitting, by the mobile terminal, the CSI to the base station. | 12-26-2013 |
20140029508 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL FROM RELAY STATION IN RADIO COMMUNICATION SYSTEM - A method and device for a transmitting and receiving a signal from a relay station in a radio communication system is provided. The method includes: receiving offset time information from a base station; configuring a time difference between an access downlink transmission subframe that transmits an access downlink signal to a relay station terminal according to the offset time information and a backhaul downlink reception subframe that receives a backhaul downlink signal from the base station; transmitting a control signal from the access downlink transmission subframe to the relay station terminal; and receiving the backhaul downlink signal from the base station in the backhaul downlink reception subframe. | 01-30-2014 |
20140036764 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a signal of a base station in a wireless communication system is provided. The method includes transmitting a first signal to the relay station through the transmission period in a subframe including a transmission period and a guard time for transmission/reception switching of a relay station, and transmitting a second signal to a macro user equipment through the guard time. Accordingly, a signal can be effectively transmitted in the wireless communication system employing the relay station. | 02-06-2014 |
20140078941 | METHOD AND DEVICE FOR EXECUTING HARQ IN TDD-BASED WIRELESS COMMUNICATION SYSTEM - Provided are a method and a device for executing a hybrid automatic repeat request (HARQ) of a terminal in a time division duplex (TDD)-based wireless communication system. The method comprises the steps of: receiving an uplink grant for a first subframe of a second serving cell through a first serving cell; transmitting uplink data in the first subframe on the basis of the uplink grant; receiving an acknowledgement/not-acknowledgement (ACK/NACK) for the uplink data through the first serving cell; and, when the ACK/NACK signal is a NACK, transmitting a retransmission data for the uplink data in a second subframe of the second serving cell. | 03-20-2014 |
20140146769 | METHOD AND WIRELESS DEVICE FOR MONITORING CONTROL CHANNEL - Provided are a method of monitoring a control channel in a multiple antenna system, in which a plurality of layers are defined, and a wireless device using same. The wireless device monitors the control channel in a search layer that is selected from the plurality of layers. | 05-29-2014 |
20140153539 | METHOD AND DEVICE FOR SETTING A CONTROL CHANNEL AND A DATA CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for configuring a starting position of a control channel in a wireless communication system, and a terminal using the same. The method includes receiving duration information about a physical downlink control channel from the first orthogonal frequency division multiplexing (OFDM) symbol of a downlink subframe; and configuring a first OFDM symbol after OFDM symbols indicated by the duration information, as a starting point of an enhanced-physical downlink control channel. The downlink subframe includes a plurality of subcarriers in a frequency domain and 12 or 14 OFDM symbols in a time domain. The PDCCH includes the first N (N is a natural number of from 1 to 4) number of OFDM symbols of the downlink subframe. The duration information indicates the N number of OFDM symbols. The E-PDCCH comprises the starting point to the last OFDM symbol of the downlink subframe. | 06-05-2014 |
20140161088 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN A WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for transmitting data in a wireless communication system. The method comprises the steps of: setting up a frame including both a control domain for transmitting scheduling information to a first terminal and a data domain for transmitting first data to the first terminal; and transmitting, to a second terminal, second data in the control domain. The frame comprises a plurality of orthogonal frequency division multiplexing (OFDM) symbols in a time domain. The control domain consists of a first number N (where N is any natural number equal to or less than 4) of OFDM symbols in the frame. The data domain consists of OFDM symbols other than a number N of OFDM symbols in the frame. The second data has a predetermined bit size. | 06-12-2014 |
20140204874 | METHOD AND APPARATUS FOR TRANSMITTING INFORMATION ABOUT A CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - A method for feeding back channel information, the method including if one or more cells are configured, performing a first feedback process and a second feeding process. The first feedback process is configured to transmit channel information including rank information The second feedback process is configured to transmit channel information including rank information which is the same as the rank information of the first feedback process. | 07-24-2014 |
20140219212 | METHOD AND APPARATUS FOR CHANNEL ESTIMATION FOR RADIO LINK BETWEEN A BASE STATION AND A RELAY STATION - A method for receiving a downlink signal at a downlink reception entity in a wireless communication system, the method includes: receiving downlink control information by demodulating an advanced Physical Downlink Control Channel (PDCCH) of a first resource block (RB) pair of a RB bundle based on a downlink channel estimated by a first Demodulation Reference Signal (DMRS) in the first RB pair; and receiving downlink data by demodulating a Physical Downlink Shared Channel (PDSCH) of a second RB pair of the RB bundle based on a downlink channel estimated by a second DMRS in the second RB pair, wherein the same DMRS pattern is used for the first and the second DMRSs, and wherein antenna ports for the first and the second DMRSs are different. | 08-07-2014 |
20140219233 | COMMUNICATION METHOD FOR COOPERATIVE MULTI-POINT AND WIRELESS DEVICE USING SAME - Provided are a communication method for a cooperative multi-point and a wireless device using the same. The wireless device receives, from a first cooperative multi-point (CoMP) cell, a first physical downlink shared channel (PDSCH) in a first subframe of a first frequency band, and receives, from a second CoMP cell, a second PDSCH in a second subframe of a second frequency band. A portion or the entire first frequency band is overlapped with the second frequency band. A first start point at which the first PDSCH in said first subframe starts being scheduled is the same as a second start point at which the second PDSCH in said second subframe starts being scheduled. | 08-07-2014 |
20140254420 | METHOD AND WIRELESS DEVICE FOR MONITORING DOWNLINK CONTROL CHANNEL - Provided are a method and a wireless device for monitoring a downlink control channel in a wireless communication system. The wireless device monitors a first downlink control channel in a first search space, and monitors a second downlink control channel in a second search space. The first downlink control channel is modulated by a first reference signal, which is generated on the basis of an identifier of a first serving cell, and the second downlink control channel is modulated by a second reference signal, which is generated on the basis of an identifier of a second serving cell. | 09-11-2014 |
20140254533 | METHOD OF MONITORING A CONTROL CHANNEL, AND WIRELESS DEVICE USING SAME - The present invention relates to a method of monitoring a control channel and a wireless device using same in a multiple antenna system in which a plurality of layers are defined. The wireless device monitors a first downlink control channel in a first search space which is mapped to a first layer, and a second downlink control channel in a second search space which is mapped to a second layer. The first layer of the plurality of layers is the lowest layer. | 09-11-2014 |
20140293975 | METHOD OF MONITORING CONTROL CHANNEL AND WIRELESS DEVICE USING SAME - The present invention relates to a method of monitoring a control channel in a wireless communication system and a wireless device using same. The wireless device monitors a first downlink control channel having an uplink grant in a first slot, and a second downlink control channel having a hybrid automatic repeat request (HARQ) positive-acknowledgement (ACK)/negative-acknowledgement (NACK) in a second slot. | 10-02-2014 |
20140307560 | METHOD AND WIRELESS DEVICE FOR MONITORING CONTROL CHANNEL - Provided are a method and a wireless device for monitoring a control channel in a wireless communication system. The wireless device monitors a first downlink control channel in a common search space of a subframe, and monitors a second downlink control channel in a user equipment-specific search space of the subframe. The first downlink control channel is modulated by a cell-specific reference signal, and the second downlink control channel is modulated by a reference signal that is specific to the wireless device. | 10-16-2014 |
20140307690 | METHOD FOR RECEIVING DATA AND WIRELESS DEVICE - Provided are a method for receiving data in a wireless communication system and a wireless device. The wireless device receives a downlink grant on a downlink control channel, and determines the size of a downlink transmission block on the basis of the downlink grant. The maximum size of the downlink transmission block is limited to below or equal to a specific value. | 10-16-2014 |
20140313970 | BACKHAUL DOWNLINK SIGNAL DECODING METHOD OF RELAY STATION AND RELAY STATION USING SAME - A method of decoding a backhaul downlink signal of a relay node (RN), the method includes receiving a higher layer signal indicating a maximum transmission rank from a base station (BS), receiving control information through a relay control channel from the BS, and demodulating the control information, wherein the control information is mapped to resource elements which do not overlap with user equipment-specific reference signal resource elements (URS REs) in a control region which is used for the relay control channel transmission of the BS, the URS REs being reserved resource elements for user equipment-specific reference signals (URSs) according to the maximum transmission rank, and wherein the control information is demodulated based on user equipment-specific reference signals transmitted by the BS on one fixed antenna port n, where n is a natural number. | 10-23-2014 |
20140314042 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE - Provided are a method and an apparatus for controlling inter-cell interference in a wireless communication system. A first cell receives control information related to the configuration of a downlink control channel from a second cell, and the first cell determines a transmission resource of the downlink control channel in accordance with the control information. | 10-23-2014 |
20140328301 | DATA RECEIVING METHOD AND WIRELESS DEVICE - Provided is a data receiving method in a wireless communication system and a wireless device using the same. A wireless device monitors a downlink control channel, and receives a downlink reference signal to be used in a demodulation of a downlink transmission block based on the resource to be used in the monitoring the downlink control channel. | 11-06-2014 |
20140328305 | METHOD AND WIRELESS DEVICE FOR MONITORING CONTROL CHANNEL - Provided are a method for monitoring a control channel and a wireless device using same. A wireless device decodes downlink control information on a downlink control channel on L number of resource units in an aggregation level L (L>1). The downlink control information comprises a plurality of modulation symbols, and permutations of the plurality of modulation symbols are mapped to the L number of resource units. | 11-06-2014 |
20140328426 | USER EQUIPMENT APPARATUS AND METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting a Channel State Information (CSI) reporting at a user equipment (UE) in a wireless communication system is disclosed. The method includes transmitting a rank indicator (RI) and a first type precoding matrix indicator (PMI) to a base station (BS) according to a first CSI feedback type; transmitting a second type PMI to the BS according to a second CSI feedback type, wherein the RI and the first type PMI are jointly coded, and transmitted through a physical uplink control channel (PUCCH), wherein the RI and the second type PMI are not jointly coded, and transmitted through the PUCCH, wherein a transmission period of the first type PMI is different than a transmission period of the second type PMI, and wherein the transmission period of the first type PMI is longer than the transmission period of the second type PMI. | 11-06-2014 |
20140334409 | USER EQUIPMENT APPARATUS AND METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting a Channel State Information (CSI) reporting at a user equipment (UE) in a wireless communication system is disclosed. The method includes transmitting a rank indicator (RI) and a first type precoding matrix indicator (PMI) to a base station (BS) according to a first CSI feedback type; transmitting a second type PMI to the BS according to a second CSI feedback type, wherein the RI and the first type PMI are jointly coded, and transmitted through a physical uplink control channel (PUCCH), wherein the RI and the second type PMI are not jointly coded, and transmitted through the PUCCH, wherein a transmission period of the first type PMI is different than a transmission period of the second type PMI, wherein the transmission period of the first type PMI is longer than the transmission period of the second type PMI, and wherein the RI is 2, 3 or 4 bits, and a size of the jointly coded RI and the first type PMI are 4 bits. | 11-13-2014 |
20140348057 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting signals by a base station in a wireless communication system. The method includes transmitting, to a relay node, resource allocation information indicating a Virtual Resource Block (VRB) set through Radio Resource Control (RRC) signaling; and transmitting a downlink subframe including at least one control channel element (CCE) related to the relay node. The at least one CCE is allocated from a specific Orthogonal Frequency Division Multiplexing (OFDM) symbol other than a first OFDM symbol of the downlink subframe. The VRB set is configured for a Relay Physical Downlink Control Channel (R-PDCCH). | 11-27-2014 |
20140348091 | METHOD AND APPARATUS FOR RECEIVING ACK/NACK IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for a user equipment, which is allocated a plurality of serving cells, receiving acknowledgement/negative acknowledgement (ACK/NACK) in a wireless communication system. The method comprises: transmitting uplink data through a physical uplink shared channel (PUSCH); and receiving ACK/NACK with respect to the uplink through a physical hybrid-ARQ indicator channel (PHICH), wherein a serving cell that receives the ACK/NACK is selected from one or more serving cells, which the user equipment monitors to detect an uplink grant that schedules the PUSCH. | 11-27-2014 |
20140355451 | METHOD FOR MONITORING A DOWNLINK CONTROL CHANNEL, AND WIRELESS DEVICE - Provided are a method for monitoring a control channel in a wireless communication system, and a wireless device. The wireless device receives a group identifier from a base station, and monitors a downlink control channel in a search space including N (N>=1) enhanced control channel elements (ECCEs) in accordance with the group identifier. | 12-04-2014 |
20140376395 | METHOD AND APPARATUS FOR MONITORING CONTROL CHANNEL - Provided are a method and an apparatus for monitoring a control channel in a sub-frame including a plurality of orthogonal frequency division multiplexings (OFDMs) in a time division duplex (TDD)-based wireless communication system. A wireless device monitors a downlink control channel in at least one OFDM symbol after an OFDM symbol receives a primary synchronization signal (PSS) in the sub-frame. | 12-25-2014 |
20150029964 | METHOD AND APPARATUS FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and an apparatus for transmitting channel state information (CSI) of a user equipment, which is allocated a plurality of serving cells, in a wireless communication system. The method comprises: receiving setting information for setting groups comprising at least one serving cell from the plurality of serving cells, and transmitting periodic CSI with respect to a group that is selected according to priority between the groups, when the periodic CSI with respect to each of the groups is set to be transmitted from the same subframe, wherein the periodic CSI with respect to each of at least two serving cells are transmitted together when the at least two serving cells are included in the group that is selected. | 01-29-2015 |
20150043524 | METHOD FOR TRANSMITTING AN UPLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - A method of receiving a sounding reference signal (SRS). The method includes transmitting, to a user equipment, a radio resource control (RRC) message transmitting, to the user equipment, a medium access control (MAC) message, the MAC message including a bitmap for indicating at least one second CC to be activated and the at least one second CC being activated based on the bitmap; transmitting, to the user equipment, a physical downlink control channel (PDCCH) including a carrier indicator field (CIF) and an SRS field via the first CC, the CIF indicating a CC of the at least one second CC and the SRS field indicating whether the user equipment has to transmit the SRS via the CC indicated by the CIF; and receiving, from the user equipment, the SRS on an uplink subframe via the CC indicated by the CIF, when the SRS field is enabled. | 02-12-2015 |
20150055548 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL VIA RELAY BACKHAUL LINK - A method for receiving a signal by a relay in a wireless communication system. The method according to an embodiment includes receiving, by the relay from a base station (BS), a reference signal (RS) in a subframe having a first slot and a second slot. Each of the first and second slots includes a plurality of consecutive resource elements over which the RS is allowed to be spread, and the plurality of consecutive resource elements overlaps a last Orthogonal Frequency Division Multiplexing (OFDM) symbol of a corresponding slot. When a last OFDM symbol of the subframe is not available for transmission from the BS to the relay, the RS is received only in the first slot of the subframe and a data signal is received in at least part of the plurality of consecutive resource elements in the second slot. | 02-26-2015 |
20150063200 | METHOD FOR PRIORITIZING OPERATION OF RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR THE SAME - Various methods and apparatuses for prioritizing operation of Relay Node are disclosed. A method for prioritizing the transmission and receipt of uplink signals in a relay node of a wireless communication system is presented. The method comprises determining radio resource requirements for receiving one or more access link signals and/or transmitting one or more backhaul link signal, determining the signal type of the one or more access link signals and/or determining the signal type of the one or more backhaul link signals, and selecting one of a transmitting mode operation and a receiving mode operation based on the radio resource requirements for receiving the one or more access link signals and/or transmitting the one or more backhaul link signals, and based on the signal type of the one or more access link signals and/or the signal type of the one or more backhaul link signals. | 03-05-2015 |
20150063282 | USER EQUIPMENT APPARATUS AND METHOD FOR FEEDING BACK CHANNEL STATE INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus are described for transmitting a channel state information (CSI) reporting at a user equipment (UE) in a wireless communication system. A rank indicator (RI) and a first type precoding matrix indicator (PMI) are transmitted to a base station (BS) according to a first CSI feedback type. A second type PMI and a channel quality information (CQI) are transmitted to the BS according to a second CSI feedback type. The RI and the first type PMI are jointly coded, and transmitted through a physical uplink control channel (PUCCH). A reporting period of the first type PMI is longer than a reporting period of the second type PMI. The first type PMI is a wideband PMI, and the second type PMI is a subband PMI. The reporting period of the first type PMI is equal to a reporting period of the RI. | 03-05-2015 |
20150078221 | METHOD AND APPARATUS FOR AGGREGATING CARRIERS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method and apparatus for aggregating carriers in wireless communication systems. In the method, a first carrier is set up, and a second carrier is added in addition to the first carrier. In addition, the first carrier is a time division duplex (TDD) carrier for which an uplink subframe and a downlink subframe are positioned at different times in a frame, and the second carrier is a carrier only for a downlink that consists of downlink subframes. | 03-19-2015 |
20150103701 | METHOD FOR RELAYING DATA PERFORMED BY A RELAY STATION IN WIRELESS COMMUNICATION SYSTEM BASED ON TDD - A method of relaying data performed by a relay station in a wireless communication system based on time division duplex (TDD) is provided. The relay station receives downlink data from a base station and relays the downlink data to at least one mobile station in an uplink subframe which belongs to an unlinked subframe. Accordingly, uplink acknowledgement (ACK) collision can be avoided, and efficiency of resource allocation can be increased. | 04-16-2015 |
20150103732 | SIGNAL TRANSMISSION METHOD AND APPARATUS IN A RELAY COMMUNICATION SYSTEM - The present invention relates to a data transmission/receiving method and apparatus in a relay communication system. In particular, the data transmission/receiving method through a backhaul link between a base station and a relay node in a relay communication system comprises: composing a backhaul subframe including a control signal transmission period to which a control signal is allocated and a backhaul signal transmission period to which a backhaul signal is allocated and then allocating the backhaul signal; transmitting configuration information about the backhaul subframe, the information containing symbol position or size data of the backhaul signal transmission period, to the relay node through an upper layer signal; and transmitting the backhaul signal having been allocated through the backhaul subframe to the relay node. | 04-16-2015 |
20150139138 | METHOD OF RELAY NODE USING REFERENCE SIGNAL AND RELAY NODE USING THE METHOD - A method for transmitting a control signal, performed by a wireless device. The method according to one embodiment includes allocating resource elements (REs) for a control channel; and transmitting the control signal through the Res. Each RE in the REs for the control channel is associated with one out of two antenna ports. The two antenna ports are included in a plurality of antenna ports used for transmitting demodulation reference signals (DM RS). | 05-21-2015 |
20150156765 | METHOD AND APPARATUS FOR RELAYING DATA IN WIRELESS COMMUNICATION SYSTEM BASED ON TDD - A method and a wireless station are described for receiving signals. The wireless station receives from a base station configured to use at least one of a plurality of time division duplex (TDD) uplink-downlink (UL-DL) subframe configurations, each of which indicates locations of at least one DL subframe and at least one UL subframe in a radio frame, a signal including information indicating that at least one uplink subframe indicated by the at least one of the plurality of TDD UL-DL subframe configurations is reconfigured as a DL subframe. The wireless station receives, from the base station, DL data on the UL subframe according to the signal. | 06-04-2015 |
20150188676 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SIGNAL FROM RELAY STATION IN RADIO COMMUNICATION SYSTEM - A method of transmitting a signal, performed by a base station, in a wireless communication system. The method according to one embodiment includes transmitting a backhaul downlink signal to a relay station through a backhaul downlink transmission subframe. The backhaul downlink transmission subframe includes 14 orthogonal frequency division multiplexing (OFDM) symbols and the 14 OFDM symbols are indexed 0 to 13. An access downlink transmission subframe, used by the relay station to transmit a signal to a user equipment, and the backhaul downlink transmission subframe are transmitted with a time aligned subframe boundary, and OFDM symbols having indices K to 12 are used for transmitting the backhaul downlink signal, where K is a natural number and 1≦K≦5: | 07-02-2015 |
20150280809 | BACKHAUL DOWNLINK SIGNAL DECODING METHOD OF RELAY STATION AND RELAY STATION USING SAME - A method of decoding a backhaul downlink signal of a relay node (RN). A higher layer signal indicating a maximum transmission rank is received from a base station (BS). Control information is received through a relay control channel from the BS. The control information is demodulated and mapped to resource elements (REs) which do not overlap with user equipment-specific reference signal (URS) REs in a control region which is used for the relay control channel transmission of the BS. The URS REs are reserved REs for URSs according to the maximum transmission rank. The control information is demodulated based on URSs transmitted by the BS on one fixed antenna port n, where n is a natural number. | 10-01-2015 |
Patent application number | Description | Published |
20120320816 | METHOD AND APPARATUS FOR DETERMINING SIZE OF TRANSPORT BLOCK TRANSMITTED BY BASE STATION TO RELAY NODE IN RADIO COMMUNICATION SYSTEM - A method for receiving a Relay node dedicated Physical Downlink Shared Channel (R-PDSCH) from a base station by a relay node in a radio communication system is disclosed. The method includes receiving, from the base station, a Modulation and Coding Scheme (MCS) index and the number NR-PDSCHPRB1 of first resource blocks to which the R-PDSCH is transmitted, under the assumption that a Relay node dedicated Physical Downlink Control Channel (R-PDCCH) is not transmitted, estimating the number NR-PDSCHPRB2 of second resource blocks to which the R-PDSCH is actually transmitted, using the number NR-PDSCHPRB1 of the first resource blocks and using the number NR-PDCCHPRB of resource blocks to which the R-PDCCH is transmitted, selecting the size of a transport block mapped to the R-PDSCH, using the number NR-PDSCHPRB2 of the second resource blocks and using a transport block index corresponding to the MCS index, and decoding the R-PDSCH, using the size of the transport block and using a modulation order corresponding to the MCS index. | 12-20-2012 |
20120327884 | APPARATUS FOR TRANSMITTING AN UPLINK SIGNAL AND METHOD THEREOF - An apparatus for transmitting an uplink signal and method thereof are disclosed, by which an uplink signal can be efficiently transmitted in a wireless communication system. The present invention includes receiving a downlink control information (DCI) used for PUSCH (physical uplink shared channel) scheduling, the DCI including an information for resource block allocation, an information for a channel status information request and a plurality of MCS (modulation and coding scheme) informations for a plurality of transport blocks and if a condition is met, transmitting a channel status information only on the PUSCH without a transport block for UL-SCH (uplink shared channel). Moreover, the condition includes a case that: only one transport block is enabled, the MCS information for the enabled transport block indicates an MCS index 29, the information for the channel status information request indicates 1, and the number of allocated resource blocks is equal to or smaller than 4. | 12-27-2012 |
20130033998 | METHOD AND APPARATUS FOR MEASUREMENT FOR INTER-CELL INTERFERENCE COORDINATION IN RADIO COMMUNICATION SYSTEM - A wireless communication system and, more specifically, a measurement method and apparatus for inter-cell interference coordination in a wireless communication system are disclosed. Herein, a method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system includes the steps of acquiring information of downlink subframe configuration of a second base station, determining measurement objects of downlink resource of the first base station based on the downlink subframe configuration of the second base station; transmitting information of the measurement objects to the UE, and receiving measurement result for the measurement objects from the UE. | 02-07-2013 |
20130083719 | METHOD FOR REPORTING A CHANNEL QUALITY INDICATOR BY A RELAY NODE IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention relates to a method for reporting a channel quality indicator for a relay node-dedicated physical downlink shared channel (R-PDSCH) from a base station by a relay node in a wireless communication system. More particularly, the method comprises the following steps: receiving one or more reference signals from the base station; calculating a channel quality indicator for the R-PDSCH on the basis of one or more reference signals; and reporting the channel quality indicator to the base station. | 04-04-2013 |
20130114498 | METHODS FOR TRANSMITTING AND RECEIVING DOWNLINK DATA IN MBSFN SUBFRAME AND APPARATUSES THEREOF - A method for receiving a downlink signal from a base station (BS) in a multicast broadcast single frequency network (MBSFN) subframe is disclosed. The method is performed by a user equipment (UE) and includes receiving information indicating an MBSFN subframe configured as an almost blank subframe (ABS) (ABS MBSFN subframe) among MBSFN subframes of which a data region is allocated a reduced transmission power lower than a transmission power in a data region of a normal subframe, and demodulating the downlink signal received in the data region of the ABS MBSFN subframe based on a cell-specific reference signal (CRS) in a control region of the ABS MBSFN subframe according to the information. | 05-09-2013 |
20130155999 | METHOD AND APPARATUS FOR PREVENTING INTER-CELL INTERFERENCE IN A HETEROGENEOUS NETWORK SYSTEM - The present application relates to a method for a victim cell to construct a subframe alignment in a wireless communication system. More particularly, the method comprises the following steps: receiving, from an interfering cell, subframe alignment information including a first bitmap for defining a subframe pattern for the victim cell and a second bitmap for defining a hybrid automatic repeat and request (HARQ) process pattern of the victim cell; constructing a subframe alignment of the victim cell on the basis of the first bitmap and second bitmap; and performing scheduling for a terminal in the victim cell using the constructed subframe alignment. A downlink signal of the interfering cell may not be transmitted in one or more subframes designated by the subframe pattern for the victim cell, and the second bitmap has a size of 8 bits. | 06-20-2013 |
20130176887 | METHOD OF REDUCING INTERCELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for transmitting a downlink signal through coordinated beamforming with a neighboring cell at a serving cell includes transmitting first subframe information for designating one or more subframes to the neighboring cell, transmitting first Precoding Matrix Index (PMI) restriction related information including one or more PMIs to a User Equipment (UE) of the serving cell, the PMIs forming a beam so that interference affecting the neighboring cell in the one or more subframes has a constant characteristic, receiving first Channel State Information (CSI) reporting measured in the one or more subframes based on the first PMI restriction related information from the UE of the serving cell, and transmitting a downlink signal to the UE of the serving cell based on the first CSI reporting, the neighboring cell receiving CSI reporting corresponding to the neighboring cell, measured by the UE of the neighboring cell in the one or more subframes. | 07-11-2013 |
20130176933 | METHOD OF PERFORMING RESOURCE SPECIFIC CHANNEL ESTIMATION IN HETEROGENEOUS NETWORK SYSTEM AND APPARATUS THEREOF - A method for performing resource specific channel estimation at a user equipment in a wireless communication system is disclosed. The method includes receiving one or more reference signals in a specific subframe from a serving cell, and performing channel estimation for a control region of a corresponding downlink subframe, based on the one or more reference signals. The channel estimation for the control region is performed based on one or more reference signals included in a data region of the corresponding downlink subframe. | 07-11-2013 |
20130223258 | INTER-CELL INTERFERENCE COORDINATION IN A WIRELESS COMMUNICATION SYSTEM - Disclosed herein is a wireless communication system. More particularly, disclosed herein is a method and apparatus for coordinating and reducing inter-cell interference in a wireless communication system. A method of transmitting channel state information (CSI) measurement resource information by a base station includes determining first and second subframe sets, in which CSI measurement will be performed, among a plurality of downlink subframes, transmitting information indicating the first and second subframe sets to a terminal, and receiving the CSI of each of the first and second subframe sets from the terminal. A subframe belonging to the first subframe set and a subframe belonging to the second subframe set do not overlap, and some of the plurality of subframes do not belong to either of the first and second subframe sets. | 08-29-2013 |
20130223400 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL CHANNEL FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for transmitting and receiving a downlink control channel for controlling inter-cell interference in a wireless communication system. An embodiment of the present invention provides a method for transmitting a downlink control channel from a base station to a terminal, and the method may comprise: a step of determining whether a downlink subframe is of a first type or a second type; and a step in which if the downlink subframe is of the first type, the number of OFDM symbols for transmitting the downlink control channel is set to a preset value (N), and the downlink control channel is transmitted using N OFDM symbols. | 08-29-2013 |
20130225188 | METHOD AND DEVICE FOR MEASURING A DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and device for measuring a downlink in a wireless communication system. According to the present invention, provided is a method for properly and accurately measuring a downlink when an inter-cell interference adjustment is applied. | 08-29-2013 |
20130230013 | METHOD AND APPARATUS FOR TRANSMITTING A CONTROL CHANNEL AND A DATA CHANNEL IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting a control channel in a wireless communication system that supports multi-cell cooperative communication. According to the present invention, a scheme for protecting a control channel and a data channel of one cell from interference caused by another cell is provided. | 09-05-2013 |
20130272158 | METHOD OF CONTROLLING UPLINK TRANSMISSION POWER AT UE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of determining uplink transmission power at a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving channel status information-reference signal (CSI-RS) settings and downlink transmission power values for a plurality of transmission points (TPs) from a higher layer, receiving CSI-RSs from the plurality of TPs, estimating path loss values corresponding to the plurality of TPs based on the received CSI-RSs, determining the uplink transmission power using the estimated path loss values, and transmitting an uplink signal to one or more of the plurality of TPs based upon the determined uplink transmission power. | 10-17-2013 |
20130272261 | METHOD FOR MITIGATING INTER CELL INTERFERENCE AND DEVICE THEREFOR - The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device therefor, wherein the method comprises the steps of: receiving a PDCCH signal that contains scheduling information from a base station on a first subframe; receiving a PDSCH signal corresponding to said PDCCH signal from said base station on a second subframe; and decoding said PDSCH signal, wherein an interval between said first subframe and said second subframe is varied. | 10-17-2013 |
20130279361 | METHOD OF REDUCING INTERCELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for processing a signal processing at a user equipment in a wireless communication system is disclosed. The method includes receiving an interference measurement subframe set from a serving cell, receiving first Channel Status Information (CSI) configuration information and second CSI configuration information from the serving cell, measuring CSI based on the first CSI configuration information in a subframe designated in the interference measurement subframe set and reporting the CSI to the serving cell, and measuring the CSI based on the second CSI configuration information in a subframe which is not designated in the interference measurement subframe set and reporting the CSI to the serving cell. | 10-24-2013 |
20130287064 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and discloses a method and a device for transmitting/receiving a downlink reference signal in a wireless communication system. The present invention provides a way for maintaining orthogonality of a reference signal between cells in a multi-cell operation. | 10-31-2013 |
20130315184 | METHOD FOR TRANSMITTING/RECEIVING CONTROL CHANNEL IN MULTICELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for a terminal to receive a control channel in a wireless communication system. More particularly, the present invention comprises the steps of: receiving a common control channel from a base station; determining an effective channel between the base station and the terminal according to a flag bit of the terminal being indicated in the common control channel; and receiving a terminal specific control channel from the base station on the basis of the effective channel, wherein the terminal specific control channel is space-multiplexes with terminal specific control channels of other terminals controlled by the base station. | 11-28-2013 |
20130315186 | METHOD FOR TRANSMITTING CONTROL CHANNEL IN MULTICELL COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed is a method for transmitting a control channel in a multicell cooperative wireless communication system. More particularly, the present invention comprises the steps of: a 1 | 11-28-2013 |
20130329612 | METHOD AND DEVICE FOR CONTROLLING INTERFERENCE BETWEEN CELLS IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device for a serving cell to control the interference between cells in a time division duplex (TDD) wireless communication system, the method comprising the steps of: transmitting to a neighbor cell subframe allocation information for indicating one or more uplink (UL) subframes; and limiting UL transmission activity in the one or more of the UL subframes. | 12-12-2013 |
20130336299 | RETRANSMISSION METHOD FOR DYNAMIC SUBFRAME SETTING IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - Disclosed is a method for allowing a terminal to transmit and receive signals to and/from a base station in a wireless communication system using a time division multiplexing method. Specifically, the method comprises the steps of: receiving a request signal for resetting into a second uplink/downlink setting while transmitting and receiving a signal according to a first uplink/downlink setting; terminating an uplink retransmission process associated with a specific uplink subframe when the use of the specific uplink subframe is changed into a downlink subframe according to the second uplink/downlink setting; and applying the second uplink/downlink setting at a specific time point to transmit and receive signals. | 12-19-2013 |
20130343340 | METHOD FOR RECEIVING DOWNLINK SIGNAL AND METHOD FOR TRANSMITTING SAME, AND DEVICE FOR RECEIVING SAME AND DEVICE FOR TRANSMITTING SAME - The present invention relates to a method for a transmission device to transmit data and a reference signal for demodulation for the data, to a reception device. The transmission device of the present invention appropriately configures the reference signal for demodulation of the data being transmitted to the reception device by the transmission device, and transmits the reference signal to the reception device with the data. According to embodiments of the present invention, the demodulation performance for the data transmitted from the transmission device to the reception device is enhanced. | 12-26-2013 |
20140003250 | METHOD FOR COMMUNICATION CONSIDERING INTERFERENCE BETWEEN CELLS IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR | 01-02-2014 |
20140036851 | METHOD FOR SENDING AND RECEIVING SIGNALS FOR ALLEVIATING INTER-CELL INTERFERENCE IN A WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR - Disclosed is a method whereby a terminal sends and receives signals between itself and a serving cell in a wireless communication system. More specifically, the invention comprises the steps of: receiving information relating to a default bandwidth and an allocation bandwidth from the serving cell; and, if the terminal is positioned at a cell edge, either sending an uplink signal to the serving cell or receiving a downlink signal from the serving cell on the basis of the allocation bandwidth, and, here, the allocation bandwidth is either smaller than or the same as the default bandwidth. | 02-06-2014 |
20140064204 | METHOD FOR RECEIVING DOWNLINK SIGNAL AND METHOD FOR TRANSMITTING SAME, USER EQUIPMENT, AND BASE STATION - Presented is a plan for utilizing resources not being used in a subframe consisting of relay transmission, and being thrown away thereafter. The present invention enables efficient utilization of the resources by reducing the waste of the resources in a wireless communication system supporting a relay. | 03-06-2014 |
20140071929 | METHOD FOR TRANSMITTING/RECEIVING DOWNLINK CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed in the present invention is a method for a terminal to receive a downlink signal from a base station in a wireless communication system. More particularly, the present invention comprises the steps of: receiving downlink control information from the base station in a data region of a first subframe; and receiving downlink data in a data region of a second subframe, on the basis of the downlink control information, wherein the second subframe is a subframe available after a preset number of subframes from the first subframe. | 03-13-2014 |
20140112216 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM - The present invention pertains to a wireless communication system, and more particularly, to a method for transmitting an uplink (UL) signal in a time division duplex (TDD) wireless communication system and an apparatus therefor, and the method comprises the following steps: receiving information limiting UL transmission activity from a serving cell; and transmitting a UL subframe in consideration of the information, wherein signal transmission of specific time-frequency resources corresponding to the information in the UL subframe is limited. | 04-24-2014 |
20140112312 | METHOD FOR TRANSMITTING SIGNAL USING PLURALITY OF CODEWORDS IN WIRELESS COMMUNICATION SYSTEM AND TRANSMISSION END FOR SAME - A method for transmitting a signal using a plurality of codewords in a wireless communication system and a transmission end for same are disclosed. The method for the transmission end transmitting the signal using the plurality of codewords, according to the present invention, comprises the following steps: mapping a first codeword on at least one layer from a first layer group and mapping a second codeword on at least one layer from a second layer group, when transmitting a rank of at least five; and transmitting the codewords which are mapped on the first and second layer groups, wherein each of the first layer group and the second layer group can include four layers. | 04-24-2014 |
20140133425 | METHOD AND APPARATUS FOR SIGNAL TRANSCEIVING IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention is a method for receiving a signal from a plurality of transmission points in a wireless communication system, the method for receiving a signal comprising the steps of: blind decoding a first search space of a subframe received from a first transmission point; and blind decoding a second search space of a subframe received from a second transmission point, wherein the combination of the first search space and the second search space is equivalent to a search space that results when a signal is received from only one transmission point from among the plurality of transmission points. | 05-15-2014 |
20140140337 | METHOD FOR ACQUIRING TIME SYNCHRONIZATION IN A HETEROGENEOUS NETWORK AND APPARATUS FOR THE SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for acquiring time synchronization in a wireless communication system, and to an apparatus for the method, wherein the method comprises the steps of: obtaining information on a discontinuous transmission pattern of a synchronous channel; attempting detection of a synchronous channel of a base station; and, if said detection fails, continuously attempting detection of the synchronous channel of the base station during a predetermined time period. If the base station is of a first type, said predetermined time period is set to be the same as or longer than the time period in which the synchronous channel is continuously not transmitted in said discontinuous transmission pattern. If the base station is of a second type, said predetermined time period is set to be the same as or longer than the time period in which the synchronous channel is continuously transmitted in said discontinuous transmission pattern. | 05-22-2014 |
20140153427 | METHOD AND APPARATUS FOR MONITORING A WIRELESS LINK IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more particularly to a method and apparatus for monitoring a wireless link. A method for monitoring a wireless link by a terminal in a wireless communication system according to one embodiment of the present invention comprises the steps of: receiving a precoded control channel; and estimating the quality of the wireless link for the received precoded control channel, wherein the quality of the wireless link can be estimated on the basis of an assumption by the terminal regarding the precoding applied to the precoded control channel. | 06-05-2014 |
20140161023 | COMMUNICATION METHOD USING MULTIPLE TRANSMISSION POINTS, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and apparatus for transmitting channel quality information by a terminal in a wireless communication system, the method comprising: receiving information on a plurality of transmission nodes capable of performing CoMP transmission; transmitting first channel state information on one or more preferred transmission nodes from among the plurality of transmission nodes; receiving pattern information consisting of a plurality of combinations of CoMP sets, each of which corresponds to a relevant time interval according to the pattern information; and performing an operation for transmitting second channel state information on the combination of CoMP sets corresponding to a subframe n. | 06-12-2014 |
20140169345 | METHOD AND APPARATUS FOR ACQUIRING SYNCHRONIZATION IN RADIO COMMUNICATION SYSTEM - A method for acquiring synchronization by a user equipment (UE) in a radio communication system is disclosed. The method includes receiving a synchronization signal from a first transmission point, and acquiring synchronization to a second transmission point using the synchronization signal and information including a subframe offset received from the first transmission point, wherein the subframe offset is a subframe difference value between the first transmission point and the second transmission point. | 06-19-2014 |
20140192672 | METHOD AND APPARATUS FOR REPORTING A MEASUREMENT IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for reporting a measurement by a terminal, comprising the steps of: measuring the magnitude of a signal from a first transmission point; and measuring the magnitude of a signal from a second transmission point. The measurements of the magnitudes of the signals from each transmission point are performed using a channel state information reference signal. | 07-10-2014 |
20140269595 | METHOD AND DEVICE FOR RECEIVING OR TRANSMITTING DOWNLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for receiving and transmitting downlink control information in a wireless communication system are disclosed. The method for receiving a downlink control signal by a user equipment (UE) in a wireless communication system includes: receiving an Enhanced Physical Downlink Control Channel (EPDCCH) from a downlink serving base station (BS); and monitoring a plurality of EPDCCH candidates in an EPDCCH set contained in the received EPDCCH, wherein a minimum aggregation level (AL) of the EPDCCH candidates is associated with a downlink (DL) bandwidth of the wireless communication system and downlink control information (DCI) format. | 09-18-2014 |
20140307700 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method for enabling a base station to transmit control information in a wireless communication system according to one embodiment of the present invention, comprises a step of transmitting an enhanced physical downlink channel (E-PDCCH) for a terminal using at least one physical resource block pair among a plurality of physical resource block pairs for transmitting the E-PDCCH, wherein the plurality of physical resource block pairs include one or more physical resource block pair sets, and a parameter related to a demodulation reference signal for the E-PDCCH is set with respect to each physical resource block pair set. | 10-16-2014 |
20140307757 | METHOD AND DEVICE FOR DECODING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for allowing a terminal to decode a signal in a wireless communication system, and the method for decoding the signal comprises the steps of determining a spreading factor for a physical resource block pair included in a subframe; and decoding a decoding reference signal on said physical resource block pair by using an orthogonal sequence corresponding to said spreading factor. | 10-16-2014 |
20140313925 | MEASURING METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method for transmitting information for measuring a terminal by a first transmission point among a plurality of transmission points which use identical time division duplex (TDD) settings in a wireless communication system. The method is an information transmitting method and includes a step of transmitting a subframe set for measurement to the terminal, wherein the subframe set is determined from first and second pieces of information related to a change of the TDD setting. | 10-23-2014 |
20140314038 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting control information by a base station in a wireless communication system, and includes a step of transmitting an enhanced physical downlink channel (EPDCCH) for a terminal using at least one physical resource block pair from among a plurality of physical resource block pairs. The plurality of physical resource block pairs include a plurality of resource units for the EPDCCH transmission to which an antenna port is allocated, respectively. When the EPDCCH for a terminal is transmitted using at least two resource units from among the at least one physical resource block pairs, the same pre-coding is applied to signals to be transmitted via at least two resource units. | 10-23-2014 |
20140321407 | METHOD AND DEVICE FOR TRANSMITTING CHANNEL STATE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for allowing a terminal to transmit cone or more pieces of channel state information (CSI) in a wireless communication system, and the method for transmitting the CSI comprises the steps of: determining CSI reference resources from a subframe which is to transmit the one or more pieces of CSI; and transmitting the one or more pieces of CSI measured in the CSI reference resources wherein the determination of the CSI reference resources uses measurement sets which include one or more interference measurement sets and one or more signal measurement sets, and if the CSI reference resources are included in an overlapping manner in two or more of the one or more interference measurement sets and the one or more signal measurement sets, a resource for measuring interference or a signal is separated within the CSI reference resources. | 10-30-2014 |
20140328312 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced control channel-based operation. A method for a base station for transmitting a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: determining one antenna port to be used for the downlink control channel; mapping the downlink control channel to a resource element on the basis of a reference signal for the one antenna port; and transmitting the mapped downlink control channel to a terminal, wherein an index for the one antenna port can be determined on the basis of a control channel element (CCE) index of the downlink control channel derived from the terminal identifier. | 11-06-2014 |
20140341114 | METHOD AND DEVICE FOR TRANSMITTING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for allowing a base station to transmit a reference signal in a wireless communication system, and the method for transmitting the reference signal comprises the steps of: generating a reference signal sequence; and applying an orthogonal sequence to said reference signal sequence, and mapping to resources of each antenna port, wherein said antenna ports are included in one of first and second antenna port sets, and the configuration of the antenna ports included in said respective antenna port sets varies according to the number of available resource elements in a physical resource block pair. | 11-20-2014 |
20140341149 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced-control channel-based operation. A method for a terminal for transmitting confirmation response information in a wireless communication system according to one embodiment of the present invention comprises a step for transmitting confirmation response information for a downlink data channel by means of an uplink control channel resource, wherein an index for the uplink control channel resource can be determined on the basis of a delegate antenna port of a downlink control channel derived from the identifier of the terminal. | 11-20-2014 |
20140342747 | DEVICE-TO-DEVICE COMMUNICATION METHOD AND A DEVICE THEREFOR - The present invention relates to a method for performing device-to-device (D2D) communication by a first terminal and a second terminal in a wireless communication system. The method includes: receiving a D2D communication setup response message including resource region information for the D2D communication from a base station; determining, based on the resource region information, whether to switch an operation frequency band of the first terminal from a first frequency band to a second frequency band; and performing the D2D communication with the second terminal at the first frequency band or the second frequency band according to the determined result, wherein either the first frequency band or the second frequency band may be used for transmission in the D2D communication and the other may be used for reception in the D2D communication. | 11-20-2014 |
20140348015 | METHOD AND DEVICE FOR MEASUREMENT IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for allowing a terminal to measure at least one or more transmission points among a first transmission point and a second transmission point, which are neighboring cells, in a wireless communication system, and the measurement method comprises the steps of: measuring a reference signal strength indicator (RSSI) in a predetermined resource of a subframe; and measuring reference signal received quality (RSRQ) from said RSSI and reference signal received power (RSRP), wherein said predetermined resource is associated with the setting of an almost blank subframe (ABS) of said first transmission point for said subframe. | 11-27-2014 |
20140348142 | METHOD AND APPARATUS FOR CONTROLLING REMOTE TRANSMITTING STATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for controlling a remote transmitting station in a wireless communication system, including a step of: a first transmission point transmitting to a second transmission point time resource information related to at least one or more remote transmitting stations among a plurality of remote transmitting stations, wherein the plurality of transmitting stations located at cell edges of the first transmission point and cell identifiers of the at least one or more remote transmitting stations are changed according to a time period instructed by the time resource information. | 11-27-2014 |
20150029884 | METHOD AND APPARATUS FOR TAKING MEASUREMENTS ON NEIGHBORING CELLS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method by which a terminal takes measures on a neighboring cell in a wireless communication system, which includes the steps of: receiving a channel state information-reference signal (CSI-RS) transmitted from the neighboring cell by using first time information received from a serving cell; and taking measurements using the CSI-RS, wherein the first time information is generated on the basis of the second time information of a serving cell, which receives an uplink signal from the terminal, and the third time information from a neighboring cell, which receives the uplink signal. | 01-29-2015 |
20150029885 | METHOD AND APPARATUS FOR MEASURING IN A WIRELESS COMMUNICATION SYSTEM - A method for a terminal for taking a measurement in a wireless communication system according to an embodiment of the present invention comprises the steps of: measuring a reference signal strength indicator (RSSI); and determining reference signal received quality (RSRQ) from the RSSI and reference signal received power (RSRP), wherein the subframe for which the measurement is taken is directed by upper layer signaling, and if the terminal can obtain reference signal information of the neighboring cell, the RSSI is measured on the basis of an OFDM symbol, comprising a reference signal, in the subframe. | 01-29-2015 |
20150043472 | METHOD FOR PERFORMING HIGH-SPEED HANDOVER IN BASE STATION COOPERATIVE WIRELESS COMMUNICATION SYSTEM, AND DEVICE FOR SAME - Disclosed in the present application is a method for a terminal to perform a handover in a wireless communication system. In particular, the method comprises the steps of: receiving a random access triggering signal from a serving cell; executing a random access procedure with a target cell on the basis of the random access triggering signal; receiving a downlink signal from the serving cell and transmitting an uplink signal to the target cell; receiving, from the serving cell, a message ordering a handover to the target cell; and transmitting, to the target cell, a predetermined message indicating the completed handover, on the basis of the message ordering a handover. | 02-12-2015 |
20150043544 | METHOD AND DEVICE FOR SENDING AND RECEIVING SIGNALS IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention concerns a method whereby a base station transmits signals in a wireless communication system. The signal transmission method which comprises a step of transmitting a downlink signal in a first subframe set for uplink use, wherein the transmission timing of the first subframe is determined by means of a second subframe that precedes the first subframe, and a time value for a terminal receiving the first subframe is used in the second subframe. | 02-12-2015 |
20150049693 | METHOD AND DEVICE FOR RECEIVING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method for a terminal to receive a signal in a wireless communication system according to one embodiment of the present invention comprises a step for confirming whether a configuration change exists for a cell-specific reference signal (CRS) of a neighboring cell, and if the CRS configuration is changed for a neighboring cell, the method for receiving s signal comprises the steps of: receiving system information of the neighboring cell and acknowledging the changed CRS configuration thereby; and receiving s signal from a serving cell by means of the changed CRS configuration of the neighboring cell. | 02-19-2015 |
20150055485 | METHOD BY WHICH TERMINALS IN WIRELESS COMMUNICATION SYSTEMS RECEIVE DOWNLINK CONTROL CHANNELS AND APPARATUS FOR SAME - The present invention relates to a method by which terminals in a wireless communication system receive control channels. More particularly, the method includes the steps of: receiving control information that includes the transmission mode for the control channel and information about the number of antenna ports through a broadcast channel from a base station; and receiving the control channel on the basis of the control information. | 02-26-2015 |
20150055502 | METHOD AND APPRATUS FOR MEASUREMENT FOR INTER-CELL INTERFERENCE COORDINATION IN RADIO COMMUNICATION SYSTEM - A method for supporting measurement of a User Equipment (UE) by a first base station in a wireless communication system. The method according to an embodiment includes acquiring, by the first base station, information of a downlink subframe configuration of a second base station; and transmitting, by the first base station, information of measurement objects to the UE. The measurement objects are determined based on the downlink subframe configuration of the second base station. A measurement is performed by the UE in resources indicated based on the information of the measurement objects. The resources are determined as a combination of at least one Orthogonal Frequency Division Multiplexing (OFDM) symbol and at least one downlink subframe. The downlink subframe configuration of the second base station includes information indicating at least one subframe configured as an Almost Blank Subframe (ABS). | 02-26-2015 |
20150063236 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention provides a method for enabling a terminal to receive control information in a wireless communication system, comprising the steps of: determining resource units for Enhanced Physical Downlink Control Channel (EPDCCH) of a plurality of resource units, with respect to each of one or more resource sets; and blind-decoding the resource units for the EPDCCH with respect to each of the one or more resource sets, wherein each of the one or more resource sets is set for one of localized EPDCCH transmission or distributed EPCCH transmission. | 03-05-2015 |
20150071208 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - The present invention relates to a method for a base station to transmit a downlink signal in a wireless communication system, including the step of transmitting information related to a downlink subframe, wherein the information related to the downlink subframe is a subframe set for uplink transmission. | 03-12-2015 |
20150078326 | METHOD FOR TRANSMITTING ENHANCED CONTROL CHANNEL IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for transmitting a downlink control channel in a wireless communication system, and an apparatus therefor. Specifically, the method for transmitting an enhanced a physical downlink control channel (EPDCCH) from a serving cell comprises the steps of: forming a plurality of enhanced resource element groups (EREGs) by dividing available resource elements, comprised in one physical resource block (PRB) pair, into a predetermined number; forming an enhanced control channel element (ECCE), which is a resource allocation unit for the EPDCCH, by selecting one or more EREGs from among the plurality of EREGs; and transmitting the EPDCCH by means of the transmission resource allocated, for each ECCE, for the EPDCCH, wherein one or more EREGs forming the ECCE is selected on the basis of a cell identifier of the serving cell and/or an index of the one PRB pair. | 03-19-2015 |
20150092717 | INTER-CELL INTERFERENCE COORDINATION IN A WIRELESS COMMUNICATION SYSTEM - A method and a first base station are described for setting measurement resources. Information about setting of a blank subframe of a second base station among a plurality of subframes is received. Resources are set in which a terminal will perform measurement using the information about setting of the blank subframe of the second base station. The information about setting of the blank subframe of the second base station includes a bitmap indicating blank subframes and non-blank subframes of the second base station. In addition, the resources in which the terminal will perform measurement are determined among the blank subframes indicated by the bitmap. | 04-02-2015 |
20150103800 | INITIAL ACCESS METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a terminal's initial access method in a wireless communication system, the method including: obtaining information including a cell identification (ID) from a synchronous signal; and receiving any one of a first physical broadcast channel (PBCH) and a second PBCH channel depending on to which of a preset range the cell ID corresponds. | 04-16-2015 |
20150117291 | METHOD AND APPARATUS FOR RESOURCE MAPPING FOR PHYSICAL CHANNEL IN MULTIPLE CELL SYSTEM - The present invention relates to a wireless communication system. More particularly, provided is a method for determining a resource allocation scheme, related reference signals, transmission timing, transmission power, scrambling and the like for a physical channel so that a terminal can receive in an accurate and efficient manner the physical channel transmitted in a multiple cell environment. | 04-30-2015 |
20150124737 | METHOD FOR CONTROLLING POWER FOR DEVICE-TO-DEVICE (D2D) COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - A method for a terminal controlling power in a wireless communication system, according to the present invention, comprises the steps of: receiving from a base station power setting information on the difference in power setting values between a first channel for eNodeB-to-device (eNB2D) communication, and a second channel for device-to-device (D2D) communication; and controlling the power of the first channel and/or the second channel in accordance with the power setting information, wherein the power is controlled in accordance with a predetermined priority, which is based on a plurality of channels and a plurality of transmitted data items, which are different from each other are simultaneously transmitted by the terminal at a specific time. | 05-07-2015 |
20150124759 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced control channel-based operation. A method for a base station for transmitting a downlink control channel in a wireless communication system according to one embodiment of the present invention comprises the steps of: determining one antenna port to be used for the downlink control channel; mapping the downlink control channel to a resource element on the basis of a reference signal for the one antenna port; and transmitting the mapped downlink control channel to a terminal, wherein an index for the one antenna port can be determined on the basis of a control channel element (CCE) index of the downlink control channel derived from the terminal identifier. | 05-07-2015 |
20150124760 | METHOD AND APPARATUS FOR ENHANCED CONTROL CHANNEL-BASED OPERATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, to a method and an apparatus for enhanced-control channel-based operation. A method for a terminal for transmitting confirmation response information in a wireless communication system according to one embodiment of the present invention comprises a step for transmitting confirmation response information for a downlink data channel by means of an uplink control channel resource, wherein an index for the uplink control channel resource can be determined on the basis of a delegate antenna port of a downlink control channel derived from the identifier of the terminal. | 05-07-2015 |
20150131566 | SIGNAL TRANSMISSION/RECEPTION METHOD AND APPARATUS THEREFOR - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method by which a terminal receives a signal in a wireless communication system which supports device-to-device (D2D) communication and an apparatus therefor, the method comprising the steps of: receiving, from a base station, information about a second signal for D2D communication; receiving from the base station, information about a first signal which acts as an interference signal; receiving the second signal along with the first signal from a second terminal; and removing the first signal from the second signal by using the information about the first and the second signal, wherein the information about the second signal includes an indicator for indicating whether the second signal has the same format used in a 3GPP LTE system, and the information about the second signal further includes information about a parameter different from the one that is used in the 3GPP LTE system, if the second signal does not have the same format as used in the 3GPP LTE system. | 05-14-2015 |
20150139006 | METHOD AND APPARATUS FOR CARRYING OUT DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATIONS SYSTEM - Disclosed is a method by which a first device carries out device-to-device (D2D) communications in a wireless communications system, the method including the steps of: receiving discovery-related information from a third device; and receiving a discovery signal by using the discovery-related information, wherein the discovery-related information includes the kind of the reference signal used as the discovery signal and/or the information relating to the carrier frequency. | 05-21-2015 |
20150139093 | METHOD AND DEVICE FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - The present invention according to one embodiment relates to a method for enabling a terminal to receive control information in a wireless communication system, and the method for receiving the control information comprises the step of attempting to decode a set of enhanced physical downlink control channel (EPDCCH) candidates according to each set level, wherein a minimum value among the values available as the set levels is set according to the amount of available resources for an EPDCCH within a physical resource block (PRB) pair that is attempting to decode. | 05-21-2015 |
20150139109 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION THROUGH EPDCCH IN WIRELESS COMMUNICATION SYSTEM - The present invention according to one embodiment is a control information receiving method wherein the method enables a terminal to receive control information through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, and comprises the steps of: indexing resource elements (RE) included in a physical resource block (PRB) set of a received subframe, as ‘n’ enhanced resource element groups (EREG) per PRB pair; indexing the indexed EREG as ‘m’ enhanced control channel elements (ECCE) per PRB pair; and determining EPDCCH candidates constituting a specific search space for a terminal on the basis of the indexed ECCE and performing blind decoding, wherein the number of EREG per PRB pair, ‘n’ is determined by considering at least one among the available RE number in PRB pairs, a structure of the subframe, and a type of carrier. | 05-21-2015 |
20150139141 | METHOD AND APPARATUS FOR REDUCING INTER-CELL INTERFERENCE IN RADIO COMMUNICATION SYSTEM - A method of a first cell for supporting a downlink channel demodulation at a user equipment. The method according to one embodiment includes transmitting, by the first cell to the user equipment, information on a Cell-specific Reference Signal (CRS) of a second cell including at least one CRS antenna port count information of the second cell or Multicast/Broadcast over Single Frequency Network (MBSFN) subframe configuration information of the second cell; and transmitting, by the first cell to the user equipment, a downlink signal on the downlink channel. The information on the CRS of the second cell is used by the user equipment to demodulate the downlink channel. | 05-21-2015 |
20150139151 | METHOD AND DEVICE FOR TRANSMITTING/RECEIVING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and discloses a method and a device for transmitting/receiving a downlink reference signal in a wireless communication system. The present invention provides a way for maintaining orthogonality of a reference signal between cells in a multi-cell operation. | 05-21-2015 |
20150146639 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION THROUGH EPDCCH IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for a terminal receiving control information through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, comprising the steps of: indexing resource elements (RE), which are included in a physical resource block (PRB) set of a received subframe, in units of enhanced resource element groups (EREG); indexing the EREGs that are indexed in units of enhanced control channel elements (ECCE); and determining EPDCCH candidates which comprise a terminal-specific search space on the basis of the ECCEs which are indexed, and then blind decoding same, wherein the terminal determines whether a predetermined resource unit for a common search space and the terminal-specific search space overlap. | 05-28-2015 |
20150163037 | METHOD FOR DEVICE-TO-DEVICE COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS THEREFOR - Disclosed is a method for a device, communicating device-to-device, for receiving a signal in a wireless communication system. Specifically, the method comprises the steps of: receiving, from another device, a signal via device-to-device communication during a first sub-frame; and receiving, from a base station, a signal during a second sub-frame, wherein the signal is received via device-to-device communication when the first sub-frame and the second sub-frame overlap. | 06-11-2015 |
20150163687 | METHOD FOR PERFORMING MEASUREMENT OF TERMINAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method for enabling a terminal to perform a measurement in a wireless communication system. More specifically, the present invention comprises the steps of: receiving information related to a specific cell group as a measuring target; determining a representative value by performing the measurement for the specific cell group according to the received information; and performing radio resource management or radio link monitoring on the basis of the representative value, wherein the specific cell group is configured to enable a virtual cell identifier to comprise a plurality of equally set cells. | 06-11-2015 |
20150180616 | METHOD FOR OPERATING BUFFER FOR DEVICE-TO-DEVICE (D2D) COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - A method for a terminal transmitting/receiving a signal with device-to-device (D2D) on the basis of a hybrid automatic repeat and request (HARQ) in a wireless communication system, comprises the steps of: receiving allocation information for establishing a wireless resource for a specific HARQ process from at least one first HARQ process as a wireless resource for a second HARQ process; and transmitting/receiving the signal with an external terminal by using the wireless resource of the second HARQ process, wherein a soft buffer, which is linked to the second HARQ process, is a reestablished soft buffer that is linked to the at least one HARQ process, in accordance with the allocation information. | 06-25-2015 |
20150181366 | SYNCHRONIZATION METHOD AND SYNCHRONIZATION APPARATUS FOR D2D COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for achieving synchronization for the device-to-device (D2D) communication of a first terminal in a wireless communication system, comprising the steps of: calculating a time advance of a second terminal using the information relating to the transmission timing of a second transmission point, the downlink transmission timing of a first transmission point, timing the receipt of a downlink signal from the second transmission point; and receiving a signal from the second terminal using the timing advance of the second terminal. | 06-25-2015 |
20150181568 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention is a method in which a terminal receives control information through an Enhanced Physical Downlink Control Channel (EPDCCH) in a wireless communication system, the method comprising a step of trying EPDCCH decoding for each of a plurality of EPDCCH Physical Resource Block (PRB) sets. The terminal determines an EPDCCH-mapped resource element using a parameter set for each EPDCCH PRB set for each of the plurality of EPDCCH PRB sets when trying the decoding. The parameter set includes a Cell-specific Reference Signal (CRS)-related parameter, a Channel State Information-Reference Signal (CSI-RS)-related parameter, and a Physical Downlink Control Channel (PDCCH)-related parameter. | 06-25-2015 |
20150181569 | METHOD AND APPARATUS FOR ACQUIRING DIVERSITY GAIN ACCORDING TO DISTRIBUTED RESOURCE ALLOCATION FOR DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM - In the present invention, disclosed is a method for a base station transmitting a downlink control channel to user equipment in a wireless communication system. More specifically, the method comprises the steps of configuring resource elements, which are included in each of a plurality of resource blocks, as a plurality of resource element groups comprising a predetermined number of resource elements; allocating antenna ports to the resource elements which are included in each of the plurality of resource element groups; allocating as a transmission resource for the downlink control channel, at least one resource element group from each of the plurality of resource blocks; and transmitting the downlink control channel to the user equipment by using the transmission resource. | 06-25-2015 |
20150189531 | METHOD AND DEVICE FOR MEASURING A DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM - A method of performing downlink measurement at a user equipment in a wireless communication system is described. Information indicating one or more subframes on which downlink measurement is to be performed is received from a base station. The downlink measurement is performed in the one or more subframes configured by the information. The one or more subframes are configured based on a subset of subframes with reduced activity of a neighbor base station which performs inter-cell interference coordination with the base station. | 07-02-2015 |
20150189629 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for enabling a terminal to receive a downlink signal through an enhanced physical downlink control channel (EPDCCH), comprising the steps of: decoding fallback downlink control information (DCI) format in an EPDCCH physical resource block set; and receiving a physical downlink shared channel (PDSCH) on the basis of the fallback DCI format, wherein the PDSCH transmission for receiving the PDSCH is determined according to whether the EPDCCH physical resource block set corresponds to localized EPDCCH transmission or distributed EPDCCH transmission. | 07-02-2015 |
20150208290 | METHOD AND APPARATUS FOR PERFORMING HANDOVER IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal to perform a handover in a wireless communication system, including the steps of: receiving a handover instruction from a serving cell; and performing a random access procedure for a target cell according to the handover instruction, wherein, when interference adjustment is performed on the serving cell and the target cell, system information for the target cell is obtained from the serving cell. | 07-23-2015 |
20150215905 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment decoding an enhanced physical downlink control channel (EPDCCH) in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining from a downlink subframe a reference element (RE) on which the EPDCCH is mapped; and decoding the EPDCCH based on the RE on which the EPDCCH is mapped. At least one EPDCCH-physical resource block (PRB)-set for monitoring the EPDCCH can be established for the user equipment, wherein a parameter set for each of the at least one EPDCCH-PRB-set is indicated by an upper layer, and the RE on which the EPDCCH is mapped can be determined based on the parameter set indicated by the upper layer. | 07-30-2015 |
20150215906 | METHOD AND APPARATUS FOR TRANSRECEIVING DOWNLINK SIGNAL BY CONSIDERING ANTENNA PORT RELATIONSHIP IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless communication system, and more specifically, disclosed are a method and an apparatus for transmitting or receiving a downlink signal by considering an antenna port relationship. A method for user equipment receiving a physical downlink shared channel (PDSCH) signal in the wireless communication system, according to one embodiment of the present invention, comprises the steps of: determining a start symbol index of the PDSCH from a downlink subframe; and receiving the PDSCH signal based on the start symbol index, wherein the PDSCH can be scheduled by means of downlink control information (DCI) which is received through a physical downlink control channel (PDCCH) or an enhanced PDCCH (EPDCCH). When the DCI is comprised according to DCI format 1A, which is transmitted through the EPDDCH, and the downlink subframe is a non-multicast broadcast single frequency network (MBSFN) subframe, the start symbol index can be determined depending on an EPDCCH start symbol value which is established by an upper layer. | 07-30-2015 |
20150215908 | METHOD AND DEVICE FOR RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An embodiment of the present invention relates to a method of receiving a downlink signal through an enhanced physical downlink control channel (EPDCCH) by a terminal in a wireless communication system and includes: receiving a demodulation reference signal from a set of EPDCCH physical resource blocks (EPDCCH PRBs); and attempting to demodulate the EPDCCH by the set of EPDCCH PRBs with reference to the demodulation reference signal, wherein when a transmission mode set for the terminal is a preset transmission mode, the terminal assumes that a cell-specific reference signal of a serving cell is QCL (Quasi Co-Located) with the demodulation reference signal. | 07-30-2015 |
20150223209 | METHOD AND APPARATUS FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention relates to a method for receiving control information through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, including the steps of: channel estimation in an EPDCCH related physical resource block (PRB) pair set; and, on the basis of the channel estimation, monitoring the EPDCCH in the PRB pair set, wherein, when the number of physical antennas of a transmission point transmitting the EPDCCH is 1, the terminal is assumed to identically precode allocated ports for the EPDCCH. | 08-06-2015 |
20150229455 | METHOD AND APPARATUS FOR TRANSMITTING RECEPTION ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - One embodiment of the present invention is a method in which a terminal transmits an acknowledgement of reception performed through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system, the method comprising the steps of: decoding the EPDCCH in both a first EPDCCH physical resource block (PRB) set and a second EPDCCH PRB set; and transmitting an acknowledgement of reception performed through each EPDCCH. The resource indices for transmitting an acknowledgement of reception performed through each EPDCCH are determined in mutually different manner based on the type of the EPDCCH PRB set, whether or not the number of the PRB pairs contained in each EPDCCH PRB set corresponds to each other, and/or whether or not the EPDCCH PRB sets overlap. | 08-13-2015 |
20150230211 | METHOD FOR RECEIVING DOWNLINK SIGNAL, AND USER DEVICE; AND METHOD FOR TRANSMITTING DOWNLINK SIGNAL, AND BASE STATION - In the present invention, a demodulation reference signal is transmitted using a plurality of settings in which demodulation reference signals occupy different positions in at least a density or time-frequency resource region of the demodulation reference signals. A base station can transmit, to the user device, information indicating a setting related to a downlink signal or a setting related to an uplink signal from among the plurality of settings, and the user device can receive the demodulation reference signal with the downlink signal or transmit the demodulation reference signal With the uplink signal according to the indicated setting. | 08-13-2015 |
20150237603 | METHOD AND APPARATUS FOR RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method by which a terminal receives a downlink signal through an enhanced physical downlink control channel (EPDCCH) in a wireless communication system. The method includes the steps of: receiving one or more EPDCCH physical resource block (PRB) sets; and blind decoding EPDCCH candidates for each set level from among the one or more EPDCCH PRB sets, wherein one or more of EPDCCH candidate indexes and EPDCCH PRB indexes are used for determining an antenna port related to the EPDCCH candidates. | 08-20-2015 |
20150257130 | METHOD AND DEVICE FOR TRANSMITTING AND RECEIVING DOWNLINK SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and device for receiving a downlink signal by a terminal in a wireless communication system. More particularly, the method includes: receiving first quasi co-location (QCL) characteristic-related information for the downlink communication of a first RF resource; and receiving a downlink signal by using a second RF resource, wherein the second RF resource indicates an RF resource when the use of an RF resource is changed from uplink communication use to downlink communication use at a specific time, and a downlink signal is decoded by using second QCL characteristic-related information for the downlink communication of the second RF resource, and the first QCL characteristic-related information and the second QCL characteristic-related information are independently defined. | 09-10-2015 |
20150271790 | METHOD FOR RECEIVING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention relates to a method and an apparatus for a terminal for receiving control information in a wireless communication system. More specifically, the method comprises a step for monitoring an enhanced physical downlink control channel (EPDCCH) set comprised in an EPDCCH, wherein an aggregation level for monitoring the EPDCCH set is determined according to the configuration regarding the EPDCCH set. | 09-24-2015 |