Patent application number | Description | Published |
20090199066 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method for determining a transport block size and a signal transmission method using the same are disclosed. When the signal transmission method constructs a transport block size combination by predetermining the transport block size, it prevents the insertion of any dummy bits in consideration of the limitation of an input bit length of an encoder during an encoding step. If a CRC is attached to the transport block and the transport block is segmented into a plurality of code blocks, the signal transmission method can establish a length of the transport block in consideration of a length of the CRC attached to each code block. | 08-06-2009 |
20090201951 | METHOD AND ADJUSTING TRANSMISSION TIMING AND TRANSMITTING CONTINUOUS PACKETS AND MOBILE STATION THEREOF - A method of adjusting transmission timing, a method of continuously transmitting packets, and a mobile station are provided. The method of adjusting the transmission timing includes adjusting the transmission timing according to a transmission timing adjustment command when the transmission timing adjustment command is received from a receiving side; and creating a cyclic prefix (CP) in consideration of a part of a CP of a next symbol which overlaps with a previous symbol on a time axis on the basis of the adjusted transmission timing. Accordingly, it is possible to prevent deterioration in reception performance and minimize reception complexity even when packet transmission timing is adjusted at a transmitting side using an OFDMA or analogous radio access scheme. | 08-13-2009 |
20090232095 | METHOD FOR RESOLVING COLLISION OF UPLINK SIGNALS - A method for processing data in a wireless communication system is provided. The method includes receiving a first uplink scheduling command indicating a first radio resource, receiving a second uplink scheduling command indicating a second radio resource through a random access response, and stopping a procedure associated with the second uplink scheduling command when the first radio resource and the second radio resource collide. | 09-17-2009 |
20090238064 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 09-24-2009 |
20090241004 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 09-24-2009 |
20090290538 | METHOD OF TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a control signal in a wireless communication system is provided. The method includes acquiring a resource index, the number of cyclic shifts (CSs) and a CS interval, wherein the number of CSs is an integer multiple of the CS interval, determining a CS index based on the number of CSs and the CS interval, generating a cyclically shifted sequence by cyclically shifting a base sequence by a CS amount obtained from the CS index, generating a modulated sequence based on the cyclically shifted sequence and a symbol for a control signal and transmitting the modulated sequence after mapping the modulated sequence to a resource block obtained from the resource index. | 11-26-2009 |
20090296644 | METHOD AND DEVICE FOR TRANSMITTING UPLINK SIGNAL INCLUDING DATA AND CONTROL INFORMATION VIA UPLINK CHANNEL - A method and device for transmitting a first and second uplink signal, each having data and control information is provided. The method includes channel encoding the control information of the second uplink signal based on a number of symbols of control information to produce. The channel encoding includes determining the number of symbols in accordance with a payload size of the data of the first uplink signal and a total number of transmissible symbols of a Physical Uplink Shared Channel (PUSCH) of the first uplink signal. | 12-03-2009 |
20090316626 | Method for transmitting uplink signals - A method of transmitting uplink signals is disclosed. The method includes transmitting, by a user equipment, periodic control information on a Physical Uplink Control Channel (PUCCH) at a predetermined period, dropping the periodic control information and multiplexing uplink signals except the periodic control information when the user equipment is operating in subframe bundling transmission mode where the uplink signals are transmitted in a plurality of consecutive subframes, and transmitting the multiplexed uplink signals on a Physical Uplink Shared Channel (PUSCH). | 12-24-2009 |
20090316814 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is disclosed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s=P+mT12-24-2009 | |
20100027447 | Method Of Transmitting Scheduling Information In TDD System - A method of transmitting scheduling information in time-division-duplex (TDD) system is provided. The method comprises configuring a radio frame, the radio frame comprising at least one downlink subframe and at least one uplink subframe, wherein a downlink subframe is reserved for downlink transmission and an uplink subframe is reserved for uplink transmission, and transmitting scheduling information on a downlink control channel in a downlink subframe, the scheduling information comprising an uplink indicator and uplink resource assignment, the uplink indicator indicating which at least one uplink subframe the uplink resource assignment is valid for. Data can be efficiently transmitted by using an uplink indicator which indicates a specific location of a subframe. | 02-04-2010 |
20100054353 | LAYER MAPPING METHOD AND DATA TRANSMISSION METHOD FOR MIMO SYSTEM - A method for indicating a combination between a codeword and a layer in a MIMO communication, system, a layer mapping method, and a data transmission method using the same are disclosed. A minimum number of codeword-layer mapping combinations from among all available combinations based on the numbers of all codewords and all layers are pre-defined in consideration of a ratio of a codeword to a layer, a reception performance of a receiver, and reduction of combinations, so that a data transmission method using the predefined combinations is implemented. If a specific one codeword is mapped to at least two layers, a diversity gain can be acquired. | 03-04-2010 |
20100067479 | METHOD FOR ALLOCATING RESOURCE, AND METHOD FOR TRANSMITTING RESOURCE ALLOCATION INFORMATION - A resource allocation method and a resource allocation information transmission method are provided. Smallest units of resource allocation are set as basic resource blocks and groups of a specific number of basic resource blocks are set as group resource blocks. Resources can be allocated in units of basic resource blocks or in units of group resource blocks depending on the amount of resources required for data transmission of each UE. Resource allocation information for allocation in units of basic resource blocks is set to be different from resource allocation information for allocation in units of group resource blocks, thereby achieving efficient allocation of communication resources. | 03-18-2010 |
20100074305 | STBC based transmission method considering number of symbols in slot - An STBC based signal transmission method considering the number of symbols within a slot. In transmitting a signal using two or more transmission antennas in a mobile communication system using a structure in which one subframe includes two slots and each slot includes a plurality of symbols, transmission symbols are paired in units of two consecutive symbols within each subframe by an STBC scheme. The transmission symbols are mapped to a frequency region in units of slots and the mapped transmission symbols are transmitted. One symbol within a slot in which the number of symbols excluding symbols for transmitting a reference signal is an odd number is not paired by the STBC scheme. | 03-25-2010 |
20100085956 | METHOD FOR RESOLVING COLLISION OF UPLINK SIGNALS - A method for processing data in a wireless communication system is provided. The method includes receiving a first uplink scheduling command indicating a first radio resource, receiving a second uplink scheduling command indicating a second radio resource through a random access response, and stopping a procedure associated with the second uplink scheduling command when the first radio resource and the second radio resource collide. | 04-08-2010 |
20100103860 | 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 includes operating in a first mode comprising a first sub-mode and a second sub-mode, in the first sub-mode a first downlink and a first uplink between a base station and the relay station being simultaneously activated, in the second sub-mode a second downlink and a second uplink between the relay station and a mobile station being simultaneously activated, and operating in a second mode comprising a third sub-mode and a fourth sub-mode, in the third sub-mode the first downlink and the second uplink being simultaneously activated, in the fourth sub-mode the first uplink and the second downlink being simultaneously activated. | 04-29-2010 |
20100110982 | Method for transmitting channel quality information based on differential scheme - A method for transmitting channel quality information based on a differential scheme is disclosed. When channel quality information of a predetermined number of sub-bands selected by a receiver in a frequency selective channel is transmitted, total average channel information is transmitted. Channel information of the selected sub-bands is transmitted as sub-band differential information associated with average channel information. In this case, the sub-band differential information may be denoted by a specific value contained positive (+) values. If at least two channel quality information is transmitted by a MIMO system, channel quality information of one channel is transmitted, then channel quality information of the other channel is transmitted as spatial differential information. In this case, the spatial differential information is denoted by a specific value contained in a differential-value range asymmetrical on the basis of “ | 05-06-2010 |
20100113085 | METHOD FOR EFFECTIVELY TRANSMITTING SYNCHRONIZATION CHANNEL AND METHOD FOR ALLOCATING TRANSMISSION POWER FOR THE SAME - A method for effectively allocating a transmission power and a method for transmitting SCH are disclosed. In this case, the transmission power of the SCH, which is important for initial cell search of the user equipment, is increased but is not allocated to a predetermined frequency region within one OFDM symbol to obtain the increased transmission power, thereby minimizing an influence on transmission of other channels within one OFDM symbol. | 05-06-2010 |
20100118800 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATIONS SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATIONS SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 05-13-2010 |
20100118807 | METHOD AND APPARATUS FOR INDICATING DEACTIVATION OF SEMI-PERSISTENT SCHEDULING - A method and apparatus for performing semi-persistent scheduling (SPS) deactivation in a wireless mobile communication system are disclosed. A base station (BS) transmits a downlink control channel to a user equipment (UE), and deactivates the SPS when a binary field indicating resource allocation information contained in the downlink control channel is entirely filled with ‘1’. | 05-13-2010 |
20100118818 | METHOD OF RESOLVING OVERLAPS IN DATA TRANSMISSION AND USER EQUIPMENT THEREFOR - A user equipment and corresponding method of transmitting symbols by the user equipment in a wireless communication system. The method includes: generating a first symbol and a second symbol, each symbol including a cyclic prefix and a data part; manipulating a part of the second symbol to be ignored in transmission so that the first symbol and a remaining part of the second symbol are transmitted without overlapping, when the first symbol and the second symbol are overlapped due to a transmission timing advance of the second symbol; and transmitting the first symbol and the second symbol at each transmission timing to the base station. | 05-13-2010 |
20100128594 | METHOD OF RESOLVING OVERLAPS IN DATA TRANSMISSION AND USER EQUIPMENT THEREFOR - A user equipment and method of transmitting symbols by the user equipment in a wireless communication system. The method includes: generating a first symbol by adding a cyclic prefix (CP) to a first inverse fourier transformed samples, the CP being copied from the first fourier transformed samples; generating a next consecutive second symbol by adding a CP to a second inverse fourier transformed samples, the CP being copied from the second fourier transformed samples; removing samples overlapped with the first symbol from the next consecutive second symbol when the next consecutive second symbol is to be advanced in transmission timing; and transmitting the first symbol and the next consecutive second symbol to a base station. | 05-27-2010 |
20100128693 | METHOD OF RESOLVING OVERLAPS IN DATA TRANSMISSION AND USER EQUIPMENT THEREFOR - A user equipment and corresponding method of transmitting symbol by the user equipment in a wireless communication. The user equipment transmits a plurality of symbols to a base station, each symbol including a cyclic prefix and a data part. The method includes: receiving a timing adjustment command from the base station, the timing adjustment command advancing a transmission timing of symbol after a predetermined time; and transmitting a timing adjusted symbol to the base station. A length of the timing adjusted symbol is varied so that the timing adjusted symbol does not include an overlapping part with a previous symbol. | 05-27-2010 |
20100195481 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 08-05-2010 |
20100195594 | METHOD FOR TRANSMITTING CODEWORDS IN MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method for effectively transmitting/receiving a codeword in a MIMO system is disclosed. In a system including a plurality of predetermined rank structures, a reception end transmits rank information (RI), precoding matrix index (PMI), and channel quality information (CQI) of each codeword to a transmission end. The transmission end selects a rank structure on the basis of information received from the reception end. The transmission end selects only some codeword blocks among a plurality of codeword blocks available for the selected rank structure, transmits signals via the selected codeword blocks, and transmits a null signal for the non-selected codeword blocks. | 08-05-2010 |
20100208629 | METHOD OF PERFORMING HYBRID AUTOMATIC REPEAT REQUEST (HARQ) IN WIRELESS COMMUNICATION SYSTEM - A method of performing hybrid automatic repeat request (HARQ) performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving downlink assignments in a first subframe, a downlink assignment being transmitted based on a control channel element (CCE), the CCE being a logically indexed resource unit, receiving downlink data on a downlink shared channel in the first subframe, the downlink shared channel being assigned according to the downlink assignments, generating ACK/NACK signals which indicate successful or unsuccessful reception of the downlink data, and transmitting in a second subframe, the ACK/NACK signals by using uplink resources of a subset, the subset being mapped to the first subframe, at least one of the uplink resources being mapped to a plurality of CCEs in the first subframe. Limited resources for uplink feedback are effectively used to support HARQ operation. | 08-19-2010 |
20100208677 | METHOD FOR TRANSMITTING PACKETS IN A MOBILE STATION - A method of transmitting packet in a mobile station is provided. The method includes determining whether a resource reserved for a special purpose is overlapped with a resource for transmitting a packet by the mobile station, on the basis of resource allocation information on the mobile station, and delaying the transmission of the packet if the reserved resource is overlapped with the resource for transmitting the packet. Accordingly, it is possible to increase uplink packet transmission efficiency without increasing downlink overhead, by avoiding or adjusting collision of an uplink packet transmission with a time-frequency resource reserved for another purpose. | 08-19-2010 |
20100211840 | METHOD FOR RETRANSMITTING IN THE MULTI-CARRIERS SYSTEM - A method for reducing retransmission overhead in a system based on the asynchronous channel-adaptive retransmission scheme is disclosed. If the possibility of performing data retransmission is high, the system provides a method for transmitting synchronous duration (SD) information. According to the method for transmitting the SD information, the system does not transmit scheduling information whenever receiving a retransmission request, and synchronously transmits data during a predetermined synchronous duration. Namely, the data can be retransmitted without using the scheduling information. | 08-19-2010 |
20100281326 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 11-04-2010 |
20110033001 | Layer mapping method and data transmission method for MIMO system - A method for indicating a combination between a codeword and a layer in a MIMO communication system, a layer mapping method, and a data transmission method using the same are disclosed. A minimum number of codeword-layer mapping combinations from among all available combinations based on the numbers of all codewords and all layers are pre-defined in consideration of a ratio of a codeword to a layer, a reception performance of a receiver, and reduction of combinations, so that a data transmission method using the predefined combinations is implemented. If a specific one codeword is mapped to at least two layers, a diversity gain can be acquired. | 02-10-2011 |
20110080968 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION IN A MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method for transmitting a CQI in a MIMO system is disclosed. A method for allowing a receiver to feed back a CQI value to a transmitter in a Multiple Input Multiple Output (MIMO) system includes, receiving a transmission (Tx) pilot signal for each Tx antenna from a base station (BS), measuring a first CQI value of a first codeword and a second CQI value of a second codeword on the basis of the pilot signal, and transmitting the first CQI value of the first codeword and the second CQI value of the second codeword to the base station (BS), wherein at least one of the first and second CQI values includes specific information capable of indicating a transmission restriction status of a corresponding codeword. | 04-07-2011 |
20110128879 | METHOD AND DEVICE FOR TRANSMITTING UPLINK SIGNAL INCLUDING DATA AND CONTROL INFORMATION VIA UPLINK CHANNEL - A method and device for transmitting a first and second uplink signal, each having data and control information is provided. The method includes channel encoding the control information of the second uplink signal based on a number of symbols of control information to produce. The channel encoding includes determining the number of symbols in accordance with a payload size of the data of the first uplink signal and a total number of transmissible symbols of a Physical Uplink Shared Channel (PUSCH) of the first uplink signal. | 06-02-2011 |
20110164582 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is discussed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s=P+mT07-07-2011 | |
20110164584 | METHOD AND APPARATUS FOR INDICATING DEACTIVATION OF SEMI-PERSISTENT SCHEDULING - A method and apparatus for performing semi-persistent scheduling (SPS) deactivation in a wireless mobile communication system are disclosed. A base station (BS) transmits a downlink control channel to a user equipment (UE), and deactivates the SPS when a binary field indicating resource allocation information contained in the downlink control channel is entirely filled with ‘1’. | 07-07-2011 |
20110170501 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is discussed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s−P+mT07-14-2011 | |
20110194551 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method and apparatus for transmitting a downlink reference signal in a wireless communication system supporting multiple antennas is disclosed. A method for transmitting Channel State Information-Reference Signals (CSI-RSs) for eight or less antenna ports includes selecting one of a plurality of CSI-RS Resource Element (RE) groups defined on a data region of a downlink subframe and mapping CSI-RSs for the eight or less antenna ports to the selected CSI-RS RE group, and transmitting the downlink subframe in which the CSI-RSs for the eight or less antenna ports are mapped. The plurality of CSI-RS RE groups is defined such that a transmission diversity RE pair for data transmitted on the downlink subframe is not broken. | 08-11-2011 |
20110235730 | METHOD FOR TRANSMITTING AND RECEIVING DOWNLINK REFERENCE SIGNALS IN A WIRELESS COMMUNICATION SYSTEM HAVING MULTIPLE ANTENNAS - A method for transmitting and receiving downlink Reference Signals (RSs) in a wireless communication system using multiple antennas is disclosed. The downlink RS transmission method includes transmitting a first Orthogonal Frequency Division Multiplexing (OFDM) symbol in which RSs for a plurality of antenna port of first group are allocated in a predetermined order along a frequency axis, RSs for a plurality of antenna port of second group are allocated in a predetermined order along the frequency axis, and the RSs for the plurality of antenna port of first group are multiplexed in Code Division Multiplexing (CDM) with the RSs for the plurality of antenna port of second group by pairing each of the plurality of antenna port of first group with one of the plurality of antenna port of second group, and transmitting a second OFDM symbol in which the RSs for the plurality of antenna port of first group and the RSs for the plurality of antenna port of second group are positioned in an RS pattern being a frequency-domain shift of an RS pattern of the first OFDM symbol. | 09-29-2011 |
20110261729 | METHOD OF PERFORMING HYBRID AUTOMATIC REPEAT REQUEST (HARQ) IN WIRELESS COMMUNICATION SYSTEM - A method of performing hybrid automatic repeat request (HARQ) performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving downlink assignments in a first subframe, a downlink assignment being transmitted based on a control channel element (CCE), the CCE being a logically indexed resource unit, receiving downlink data on a downlink shared channel in the first subframe, the downlink shared channel being assigned according to the downlink assignments, generating ACK/NACK signals which indicate successful or unsuccessful reception of the downlink data, and transmitting in a second subframe, the ACK/NACK signals by using uplink resources of a subset, the subset being mapped to the first subframe, at least one of the uplink resources being mapped to a plurality of CCEs in the first subframe. Limited resources for uplink feedback are effectively used to support HARQ operation. | 10-27-2011 |
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 |
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 |
20120008580 | Method For Transmitting Uplink Signals - A method of transmitting uplink signals is disclosed. The method includes transmitting, by a user equipment, periodic control information on a Physical Uplink Control Channel (PUCCH) at a predetermined period, dropping the periodic control information and multiplexing uplink signals except the periodic control information when the user equipment is operating in subframe bundling transmission mode where the uplink signals are transmitted in a plurality of consecutive subframes, and transmitting the multiplexed uplink signals on a Physical Uplink Shared Channel (PUSCH). | 01-12-2012 |
20120008711 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 01-12-2012 |
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 |
20120057529 | APPARATUS AND METHOD FOR PERFORMING A HARQ IN A MULTICARRIER SYSTEM - Provided are a method and apparatus of performing a HARQ in a multiple carrier system. A receiver determines the size of a soft buffer to be used in an effective HARQ process on the basis of the maximum number of effective HARQ processes over a plurality of component carriers and stores the received transport block in the soft buffer. The present invention enables the performance of a HARQ in an efficient manner by using multiple carriers in the event the size of the soft buffer is limited. | 03-08-2012 |
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 |
20120069810 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 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 |
20120082112 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 04-05-2012 |
20120082113 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 04-05-2012 |
20120082117 | METHOD FOR TRANSMITTING UPLINK SIGNALS - A method for transmitting uplink signals, which include ACK/NACK signals, control signals other than the ACK/NACK signals, and data signals, is disclosed. The method comprises serially multiplexing the control signals and the data signals; sequentially mapping the multiplexed signals within a specific resource region in accordance with a time-first mapping method, the specific resource region including a plurality of symbols and a plurality of virtual subcarriers; and arranging the ACK/NACK signals at both symbols near symbols to which a reference signal of the plurality of symbols is transmitted. Thus, the uplink signals can be transmitted to improve receiving reliability of signals having high priority. | 04-05-2012 |
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 |
20120113925 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 05-10-2012 |
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 |
20120147805 | METHOD AND APPARATUS FOR MULTICELL COOPERATIVE COMMUNICATION - According to one aspect of the present invention, a method in which a relay performs multicell cooperative communication comprises the steps of: receiving scheduling information and data from a base station; receiving a bypass indicator from the base station; performing protocol layer processing on the scheduling information and data in accordance with the bypass indicator; and transmitting the processed data to a user equipment in accordance with the processed scheduling information, wherein said bypass indicator indicates that the protocol layer processing should be performed for only a portion of the protocol layer of the relay. | 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 |
20120176885 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING A REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - Disclosed are a method and apparatus for transmitting a reference signal. In a base station apparatus for transmitting a reference signal in a wireless communication system, a processor generates the same scrambling sequence for resource elements (REs) allocated to each layer for reference signal transmission, and spreads or covers Walsh codes such that scrambling sequences generated for the resource elements can be orthogonal to each other on a time axis, in order to generate a reference signal sequence. Here, the Walsh code spreading or covering by the processor is applied on a frequency axis on the basis of a plurality of resource blocks (RBs) or on the basis of a pair of resource blocks, such that mutually different sequences having mutually different sequence values can be mapped between resource blocks or between pairs of resource blocks. A transmission module transmits the reference signal, to which the thus-generated reference signal sequence is applied, to user equipment via each layer. | 07-12-2012 |
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 |
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 |
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 |
20120238202 | RELAY STATION DATA TRANSMISSION METHOD - A method of a relay node transmitting data is provided. The method includes receiving scheduling information about a backhaul link and data from a base station; receiving channel information about an access link from relay node user equipment; performing scheduling on the access link based on the scheduling information about the backhaul link and the channel information about the access link; and relaying the data to the relay node user equipment according to a result of the scheduling. The backhaul link means a link between the base station and the relay node, and the access link means a link between the relay node and the relay node user equipment. | 09-20-2012 |
20120263142 | FREQUENCY HOPPING PATTERN AND METHOD FOR TRANSMITTING UPLINK SIGNALS USING THE SAME - A method for performing uplink transmission in a time domain transmission unit includes receiving, from a base station, hopping-mode information indicating whether a frequency hopping is an inter-slot hopping or an inter-subframe hopping and performing the uplink transmission using a resource block in the time domain transmission unit. | 10-18-2012 |
20120269136 | METHOD FOR PERFORMING WIRELESS COMMUNICATION BETWEEN USER EQUIPMENT AND BASE STATION IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING FIRST USER EQUIPMENT USING SINGLE FREQUENCY BAND AND SECOND USER EQUIPMENT USING MULTIPLE FREQUENCY BANDS - A method for performing a wireless communication between a UE and a BS in a wireless communication system supporting a first UE using a single frequency band and a second UE using a plurality of frequency bands, to each of which OFDM is applied, is disclosed. The method includes being allocated one or more downlink component carriers for the second UE from the BS, and receiving the one or more downlink component carriers from the BS by the second UE. The one or more down-link component carriers are cyclically shifted by different cyclic shift values and the cyclic shifting is performed by multiplying each of the one or more downlink component carriers by a linear phase having a different inclination. | 10-25-2012 |
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 |
20120294207 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 11-22-2012 |
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 |
20120309426 | METHOD FOR TRANSMITTING LOCATION BASED SERVICE-REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for allowing a mobile station to detect a Location Based Service-Reference Signal (LBS-RS) in a wireless communication system is disclosed. The method includes receiving LBS-RS setup information of at least one target cell participating in location measurement from a serving cell, acquiring a frequency offset value of the target cell using the LBS-RS setup information, and detecting the LBS-RS transmitted from the target cell using the LBS-RS setup information and the frequency offset value. In addition, the method further includes measuring a reception delay time of the detected LBS-RS, and transmitting a reception delay time to the serving cell. | 12-06-2012 |
20120311397 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method and device for determining a size of a transport block based on modulation and coding related information, and resource information. | 12-06-2012 |
20120311414 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A device and method for attaching a CRC code to a transport block and turbo encoding the CRC attached transport block, where the transport block has a predetermined size. | 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 |
20120314627 | METHOD OF TRANSMITTING SCHEDULING INFORMATION IN TDD SYSTEM - A method of transmitting scheduling information in time-division-duplex (TDD) system is provided. The method comprises configuring a radio frame, the radio frame comprising at least one downlink subframe and at least one uplink subframe, wherein a downlink subframe is reserved for downlink transmission and an uplink subframe is reserved for uplink transmission, and transmitting scheduling information on a downlink control channel in a downlink subframe, the scheduling information comprising an uplink indicator and uplink resource assignment, the uplink indicator indicating which at least one uplink subframe the uplink resource assignment is valid for. Data can be efficiently transmitted by using an uplink indicator which indicates a specific location of a subframe. | 12-13-2012 |
20120327843 | METHOD FOR TRANSMITTING CONTROL CHANNEL TO RELAY NODE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for transmitting a relay node specific downlink physical control channel (R-PDCCH) at a base station in a wireless communication system is disclosed. More specifically, the method includes the steps of allocating one or more Resource Blocks (RBs) for the relay node specific downlink physical control channel, mapping the relay node specific downlink physical control channel to the one or more resource blocks, and transmitting the relay node specific downlink physical control channel to the relay node by using the one or more resource blocks, wherein the mapping step includes mapping the relay node specific downlink physical control channel along a frequency direction in a symbol belonging to a lowermost index, among the one or more resource blocks, and then mapping the relay node specific downlink physical control channel along the frequency direction in a symbol belonging to a next index. | 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 |
20130010879 | CHANNEL CODING METHOD OF VARIABLE LENGTH INFORMATION USING BLOCK CODE - A channel coding method of variable length information using block code is disclosed. A method for channel-coding information bits using a code generation matrix including 32 rows and A columns corresponding to length of the information bits includes channel-coding the information bits having “A” length using basis sequences having 32-bit length corresponding to columns of the code generation matrix, and outputting the channel-coded result as an output sequence. If “A” is higher than 10, the code generation matrix is generated when (A-10) additional basis sequences were added as column-directional sequences to a first or second matrix. The first matrix is a TFCI code generation matrix composed of 32 rows and 10 columns used for TFCI coding. The second matrix is made when at least an inter-row location or an inter-column location of the first matrix was changed. The additional basis sequences satisfy a value 10 of minimum Hamming distance. | 01-10-2013 |
20130019145 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method and device for segmenting, CRC encoding and turbo encoding a CRC attached transport block. | 01-17-2013 |
20130028238 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATION SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 01-31-2013 |
20130044605 | METHOD FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces. Here, the UE monitors a UE-specific search space, among the search spaces. The UE-specific search space is given based on a modulus operation using the variable of Yk for the subframe k and a variable C for the subframe k, wherein Yk is defined by: Yk=(A*Yk−1+B) mod D, the variable C is determined based on the number of CCEs (NCCE) divided by the aggregation level (L), and A, B and D are predetermined constant values predetermined regardless of the aggregation levels (L). | 02-21-2013 |
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 |
20130100933 | SCHEDULING METHOD IN MULTIPLE ACCESS SYSTEM AND APPARATUS USING THE SAME - A method for allocating resources in a wireless communication system is provided. A base station receives a maximum transmission power from a first wireless device. The base station allocates a resource to the first wireless device based on a ratio of the maximum transmission power to a maximum available resource. | 04-25-2013 |
20130101004 | REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N−1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M−1’ of the M antennas are mapped to the second subframe. | 04-25-2013 |
20130121247 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION IN A MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method is provided for transmitting channel quality information (CQI) in a MIMO system. A method for allowing a receiver to feed back a CQI value to a transmitter in a Multiple Input Multiple Output (MIMO) system includes receiving a transmission (Tx) pilot signal for each Tx antenna from a base station (BS), measuring a first CQI value of a first codeword and a second CQI value of a second codeword on the basis of the pilot signal, and transmitting the first CQI value of the first codeword and the second CQI value of the second codeword to the base station (BS), wherein at least one of the first and second CQI values includes specific information capable of indicating a transmission restriction status of a corresponding codeword. | 05-16-2013 |
20130128843 | METHOD AND DEVICE FOR TRANSMITTING UPLINK SIGNAL INCLUDING DATA AND CONTROL INFORMATION VIA UPLINK CHANNEL - A method and device for transmitting a first and second uplink signal, each having data and control information is provided. The method includes channel encoding the control information of the second uplink signal based on a number of symbols of control information to produce. The channel encoding includes determining the number of symbols in accordance with a payload size of the data of the first uplink signal and a total number of transmissible symbols of a Physical Uplink Shared Channel (PUSCH) of the first uplink signal. | 05-23-2013 |
20130128844 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method for adjusting a granularity of resource allocation in a wireless mobile communication system supporting a compact scheduling is discussed. A resource indication value (RIV) corresponds to a start index (S) of one set of consecutive virtual resource blocks (VRBs) and a length of the VRBs. The start index (S) is selected from among ‘s’ values (where s=P+mT05-23-2013 | |
20130128845 | METHOD AND DEVICE FOR TRANSMITTING UPLINK SIGNAL INCLUDING DATA AND CONTROL INFORMATION VIA UPLINK CHANNEL - A method and device for transmitting a first and second uplink signal, each having data and control information is provided. The method includes channel encoding the control information of the second uplink signal based on a number of symbols of control information to produce. The channel encoding includes determining the number of symbols in accordance with a payload size of the data of the first uplink signal and a total number of transmissible symbols of a Physical Uplink Shared Channel (PUSCH) of the first uplink signal. | 05-23-2013 |
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 |
20130148631 | APPARATUS AND METHOD OF TRANSMITTING AND RECEIVING DATA IN SOFT HANDOFF OF A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method of transmitting and receiving data in soft handoff of a wireless communication system. According to an aspect of the present invention, in the method of receiving data in soft handoff of a wireless communication system, a mobile station receives a first sequence being generated by interleaving transmission data using a first inter leaver pattern, and also receives a second sequence being generated by interleaving the transmission data using a second interleaver pattern. Then, the mobile station combines and decodes the first sequence and the second sequence before receiving an entire frame having the first sequence allocated thereto. | 06-13-2013 |
20130148697 | TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM - The present invention provides for transmitting a spread signal in a mobile communication system. The present invention includes spreading a signal using a plurality of spreading codes, wherein the plurality of spreading codes have a spreading factor, multiplexing the spread signal by code division multiplexing, transmitting the multiplexed signal via a plurality of neighboring frequency resources of one OFDM symbol of a first antenna set, and transmitting the same multiplexed signal via a plurality of neighboring frequency resources of one OFDM symbol of a second antenna set. | 06-13-2013 |
20130148698 | TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM - The present invention provides for spreading a first signal using a plurality of spreading codes, multiplexing the first spread signal by code division multiplexing, transmitting the first multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a first antenna set, spreading a second signal using a plurality of spreading codes, multiplexing the second spread signal by code division multiplexing, transmitting the second multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the first antenna set, transmitting the first multiplexed signal via a plurality of neighboring frequency resources of an OFDM symbol of a second antenna set, and transmitting the second multiplexed signal via a plurality of neighboring frequency resources of the OFDM symbol of the second antenna set, wherein the first multiplexed signal is transmitted on frequency resources that neighbor frequency resources that the second multiplexed signal is transmitted on. | 06-13-2013 |
20130155831 | METHOD AND APPARATUS FOR DETECTING RADIO SIGNAL - In an aspect, a method for transmitting data in a wireless communication system is provided. A wireless device determines a subcarrier and a subcarrier group to which a data sequence is allocated. The wireless device modulates the data sequence by a transmit filter to generate a data stream. A waveform of the transmit filter is determined based on the subcarrier and the subcarrier group. The wireless device generates a transmission signal based on the data stream. The wireless device transmits the transmission signal through the subcarrier. The transmission signal is cyclostationary. | 06-20-2013 |
20130157600 | METHOD AND APPARATUS FOR DETECTING RADIO SIGNAL - A method for detecting a radio signal in a wireless communication system is provided. According to the method, a wireless device measures an input signal received by a RF unit of. The wireless device eliminates a duplicated part between the input signal and a complex conjugate signal of the input signal to generate a filtered signal. The wireless device determines whether a target signal exists in the input signal based on the filtered signal. | 06-20-2013 |
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 |
20130182679 | METHOD AND APPARATUS FOR INDICATING DEACTIVATION OF SEMI-PERSISTENT SCHEDULING - A method and apparatus for performing semi-persistent scheduling (SPS) deactivation in a wireless mobile communication system are disclosed. A base station (BS) transmits a downlink control channel to a user equipment (UE), and deactivates the SPS when a binary field indicating resource allocation information contained in the downlink control channel is entirely filled with ‘1’. | 07-18-2013 |
20130194983 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 08-01-2013 |
20130202059 | METHOD AND DEVICE FOR GENERATING PRECODING MATRIX IN WIRELESS COMMUNICATION SYSTEM - Provided is a method and a device for generating a precoding matrix in a wireless communication system. The method for generating the precoding matrix comprises a step of receiving from a terminal feedback including information on the error angle θ of channel direction information (CDI), which indicates the direction of a channel direction vector, and a step of generating the precoding matrix based on the information on the error angle θ of the CDI, wherein the error angle θ of the CDI indicates the angle between the channel direction vector and a quantized channel direction vector, and includes at least one of a channel quantization error component, a channel feedback delay error component, and a channel estimation error component. | 08-08-2013 |
20130208825 | METHOD AND DEVICE FOR PRECODING IN WIRELESS COMMUNICATION SYSTEM - Provided is a method and a device for precoding in a wireless communication system. The method for precoding comprises the following steps: generating a first precoding matrix, W | 08-15-2013 |
20130230123 | METHOD OF TRANSMITTING REFERENCE SIGNALS IN A WIRELESS COMMUNICATION HAVING MULTIPLE ANTENNAS - A method of transmitting signals by a transmitting end in a wireless communication system comprises sharing control information related to reference signal with a receiving end; generating one or more precoded reference signals considering a given rank; allocating the one or more precoded reference signals to have a specific pattern within a subframe, wherein the specific pattern is varied depending on the control information; and transmitting the subframe through multiple antennas to the receiving end. | 09-05-2013 |
20130286812 | METHOD OF TRANSMITTING REFERENCE SIGNAL AND TRANSMITTER USING THE SAME - A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic. | 10-31-2013 |
20130286880 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method and apparatus for transmitting a downlink reference signal in a wireless communication system supporting multiple antennas is disclosed. A method for transmitting Channel State Information-Reference Signals (CSI-RSs) for eight or less antenna ports includes selecting one of a plurality of CSI-RS Resource Element (RE) groups defined on a data region of a downlink subframe and mapping CSI-RSs for the eight or less antenna ports to the selected CSI-RS RE group, and transmitting the downlink subframe in which the CSI-RSs for the eight or less antenna ports are mapped. The plurality of CSI-RS RE groups is defined such that a transmission diversity RE pair for data transmitted on the downlink subframe is not broken. | 10-31-2013 |
20130286981 | METHOD FOR TRANSMITTING CONTROL INFORMATION, AND METHOD FOR GENERATING CODEWORD FOR THE SAME - A method for transmitting downlink control information and a method for generating a codeword for the same are disclosed. In generating a long code having a low code rate, a basic code of which minimum distance between codes is maximized is repeated by a prescribed number of times and bits of the repeated code are adjusted. Therefore, a minimum distance condition between codes of a long code is satisfied and simultaneously the code be simply generated. | 10-31-2013 |
20130329674 | METHOD FOR SIGNALING OF RESOURCE ALLOCATION TO ADJUST GRANULARITY IN CELLULAR MULTI-CARRIER SYSTEM - A method of receiving downlink signals by a user equipment in a wireless mobile communication system, includes receiving downlink control information including resource block allocation information, wherein the downlink control information is common information for plural users; detecting a resource indication value (RIV) from the resource block allocation information, wherein the RIV indicates a start index (S) of consecutive virtual resource blocks (VRBs) and a length (L) of the consecutive VRBs; and receiving the downlink signals on the consecutive virtual VRBs. | 12-12-2013 |
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 |
20140016522 | METHOD FOR EFFECTIVELY TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of performing HARQ performed by a user equipment (UE) is provided. The method includes receiving a bundling indicator which indicates the number of bundled downlink subframes, determining whether at least one bundled downlink subframe is missed by comparing the bundling indicator with the number of detected bundled downlink subframes, generating a representative ACK/NACK signal when no bundled downlink subframe is missed, and transmitting the representative ACK/NACK signal on an uplink channel. Recovery capability is maximized and the packet loss is reduced in such a situation that less number of ACK/NACK signals are fed back than that of downlink packets. | 01-16-2014 |
20140016577 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATIONS SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATIONS SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 01-16-2014 |
20140016717 | METHOD FOR GENERATING REFERENCE SIGNAL SEQUENCE IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present application discloses a method in which a base station transmits a reference signal sequence in a wireless communication system. In detail, the method comprises the steps of: generating a pseudo-random sequence using a first m-sequence and a second m-sequence; generating the reference signal sequence using the pseudo-random sequence; and transmitting the reference signal to a mobile station via antenna ports different from one another. The second m-sequence has an initial value containing parameters for discriminating reference signal sequences among users. | 01-16-2014 |
20140023007 | RADIO ACCESS METHOD FOR REDUCED PAPR - A wireless communication system is disclosed. A method for performing a radio access in the wireless communication system includes dividing an available frequency band into a plurality of subbands, generating a plurality of frequency domain sequences from a plurality of data symbol sequences by independently performing a Fourier transform process in each of the subbands, independently mapping each of the frequency domain sequences to a corresponding subband, generating one or more transmission symbols by performing an inverse Fourier transform process on the plurality of frequency domain sequences mapped to the available frequency band, and transmitting the one or more transmission symbols to a receiver. | 01-23-2014 |
20140023121 | TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM - A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information. | 01-23-2014 |
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 |
20140105147 | METHOD FOR TRANSMITTING DOWNLINK CONTROL CHANNEL IN A MOBILE COMMUNICATIONS SYSTEM AND A METHOD FOR MAPPING THE CONTROL CHANNEL TO PHYSICAL RESOURCE USING BLOCK INTERLEAVER IN A MOBILE COMMUNICATIONS SYSTEM - A method for transmitting a downlink control channel in a mobile communication system and a method for mapping the control channel to physical resources using a block interleaver are provided. In order to transmit a downlink control channel in a mobile communication system, information bits are modulated to generate one or more modulation symbols according to a specific modulation scheme, the modulation symbols are interleaved using a block interleaver, and the interleaved modulated symbols are mapped to resource elements allocated for transmission of at least one control channel in a subframe, thereby transmitting the at least one control channel. | 04-17-2014 |
20140140267 | 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 includes operating in a first mode comprising a first sub-mode and a second sub-mode, in the first sub-mode a first downlink and a first uplink between a base station and the relay station being simultaneously activated, in the second sub-mode a second downlink and a second uplink between the relay station and a mobile station being simultaneously activated, and operating in a second mode comprising a third sub-mode and a fourth sub-mode, in the third sub-mode the first downlink and the second uplink being simultaneously activated, in the fourth sub-mode the first uplink and the second downlink being simultaneously activated. | 05-22-2014 |
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 |
20140219224 | RECEIVING CONTROL INFORMATION THROUGH PDCCH - A method for efficiently transmitting and receiving control information through a Physical Downlink Control Channel (PDCCH) is provided. When a User Equipment (UE) receives control information through a PDCCH, the received control information is set to be decoded in units of search spaces, each having a specific start position in the specific subframe. Here, a modulo operation according to a predetermined first constant value (D) is performed on an input value to calculate a first result value, and a modulo operation according to a predetermined first variable value (C) corresponding to the number of candidate start positions that can be used as the specific start position is performed on the calculated first result value to calculate a second result value and an index position corresponding to the second result value is used as the specific start position. Transmitting control information in this manner enables a plurality of UEs to efficiently receive PDCCHs without collisions. | 08-07-2014 |
20140219386 | METHOD FOR DETERMINING TRANSPORT BLOCK SIZE AND SIGNAL TRANSMISSION METHOD USING THE SAME - A method for performing, by a first device, channel coding of data to be transmitted to a second device, the method includes: determining a size of a transport block for the data; attaching a first cyclic redundancy check (CRC) code to the transport block having the determined size to produce a first CRC-attached transport block; and segmenting the first CRC-attached transport block into multiple code blocks, wherein the size of the transport block is determined from among a plurality of predetermined transport block sizes such that the multiple code blocks have a same size as each other. | 08-07-2014 |
20140237324 | CHANNEL CODING METHOD OF VARIABLE LENGTH INFORMATION USING BLOCK CODE - A method for channel-coding information bits using a code generation matrix including 32 rows and A columns corresponding to length of the information bits includes, channel-coding the information bits having “A” length using basis sequences having 32-bit length corresponding to columns of the code generation matrix, and outputting the channel-coded result as an output sequence. If “A” is higher than 10, the code generation matrix is generated when (A-10) additional basis sequences were added as column-directional sequences to a first or second matrix. The first matrix is a TFCI code generation matrix composed of 32 rows and 10 columns used for TFCI coding. The second matrix is made when at least one of an inter-row location or an inter-column location of the first matrix was changed. The additional basis sequences satisfy a value 10 of a minimum Hamming distance. | 08-21-2014 |
20140254520 | METHOD AND APPARATUS OF TRANSMITTING UPLINK SIGNAL - A method for transmitting an uplink signal by a communication apparatus in a wireless communication system is discussed. The method includes multiplexing control information with at least one of a plurality of data blocks to generate a bit sequence; and transmitting the uplink signal including the bit sequence. When the control information includes a first type of control data, the control information is multiplexed with all of the plurality of data blocks. When the control information includes a second type of control data, the control information is multiplexed only with a specific data block among the plurality of data blocks. The first type of control data includes acknowledgement/negative acknowledgement (ACK/NACK) information, and the second type of control data includes channel quality information. | 09-11-2014 |
20140254526 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 09-11-2014 |
20140254570 | METHOD OF RESOLVING OVERLAPS IN DATA TRANSMISSION AND USER EQUIPMENT THEREFOR - A method of a user equipment (UE) operating in a wireless communication system and the user equipment are discussed. The method includes receiving a timing advance command for indicating a change of uplink timing relative to a current uplink timing in a subframe; and when uplink transmissions in a subframe n and a subframe n+1 are overlapped due to the timing advance command, transmitting the subframe n completely. | 09-11-2014 |
20140269965 | TRANSMITTING SPREAD SIGNAL IN COMMUNICATION SYSTEM - A method for receiving Acknowledgement/Negative acknowledgement (ACK/NACK) information in a mobile communication system includes receiving a first signal including first spread ACK/NACK information and second spread ACK/NACK information from a first antenna set of a transmitting end in an orthogonal frequency division multiplexing (OFDM) symbol; receiving a second signal including third spread ACK/NACK information and fourth spread ACK/NACK information from a second antenna set of the transmitting end in an OFDM symbol; and de-spreading at least the first and third spread ACK/NACK information or the second and fourth spread ACK/NACK information for identifying the ACK/NACK information. | 09-18-2014 |
20140293940 | METHOD FOR TRANSMITTING PACKETS IN A MOBILE STATION - A method of performing uplink transmission at a user equipment (UE) is provided. The method includes determining whether a hybrid automatic repeat request (HARQ) retransmission collides with a random access transmission in a transmission time interval (TTI); and performing the HARQ retransmission if the HARQ retransmission does not collide with the random access transmission in the TTI, wherein a current value of information indicating a redundancy version (RV) for the HARQ retransmission is incremented by 1 if the HARQ retransmission does not collide with the random access transmission in the TTI. | 10-02-2014 |
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 |
20140321400 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - A method and communication apparatus for transmitting signals in a wireless communication system supporting a plurality of component carriers are described. A physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH) with uplink control information (UCI) and a PUSCH without the UCI are simultaneously transmitted using the plurality of component carriers. If a total transmission power of the PUCCH, the PUSCH with the UCI and the PUSCH without the UCI exceeds a value corresponding to a maximum transmission power, a transmission power determined for the PUSCH without the UCI is reduced while maintaining transmission powers determined for the PUCCH and the PUSCH with the UCI. The PUCCH and the PUSCH with the UCI are transmitted based on the maintained determined transmission powers, and the PUSCH without the UCI is transmitted based on the reduced transmission power. | 10-30-2014 |
20140321510 | FREQUENCY HOPPING PATTERN AND METHOD FOR TRANSMITTING UPLINK SIGNALS USING THE SAME - A method for performing uplink transmission in a time domain transmission unit includes receiving, from a base station, hopping-mode information indicating whether a frequency hopping is an inter-slot hopping or an inter-subframe hopping and performing the uplink transmission using a resource block in the time domain transmission unit. | 10-30-2014 |
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 |
20140348058 | METHOD FOR TRANSMITTING CONTROL CHANNEL TO RELAY NODE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method for receiving a Relay Physical Downlink Control CHannel (R-PDCCH) by a User Equipment (UE) in a wireless communication system. The method includes receiving a downlink subframe including one or more aggregated resource blocks including resource elements. The resource elements are mapped in increasing order of first a subcarrier index, and then a symbol index. The method further includes monitoring the R-PDCCH on the one or more aggregated resource blocks. The one or more aggregated resource blocks are numbered based on an aggregation level and a number of the one or more aggregated resource blocks corresponding to the aggregation level. | 11-27-2014 |
20140348108 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - A method is described for transmitting signals at a communication apparatus in a wireless communication system supporting a plurality of component carriers. A physical uplink shared channel (PUSCH) with uplink control information (UCI) and a PUSCH without the UCI are simultaneously transmitted using the plurality of component carriers. A predefined transmission power determination scheme is used to determine the transmission power of the PUSCH with the UCI, and determine the transmission power of the PUSCH without the UCI. If a total transmission power of the PUSCH with the UCI and the PUSCH without the UCI exceeds a value corresponding to a maximum transmission power configured for the communication apparatus, the determined transmission power of the PUSCH without UCI is adjusted while maintaining the determined transmission power of the PUSCH with the UCI. | 11-27-2014 |
20140349703 | METHOD FOR CONTROLLING SIGNAL TRANSMISSION POWER AND DEVICE FOR SAME - A method of transmitting signals including determining, per each of the component carriers, transmission power of at least one channel for simultaneous transmission, in such a way that a total transmission power of the at least one channel does not exceed a maximum transmission power configured for a corresponding component carrier; and checking whether a total transmission power of channels over the multiple component carriers for the simultaneous transmission exceeds a total maximum transmission power configured for the communication apparatus or not. If the total transmission power of the channels exceeds the total maximum transmission power configured for the communication apparatus, transmission power of at least one PUSCH among the channels is adjusted in such a way that an adjusted total transmission power over the multiple component carriers does not exceed the total maximum transmission power. | 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 |
20140362799 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL - Provided are a method and a wireless device for transmitting a sounding reference signal in a wireless communication system. The wireless device receives an SRS (sounding reference signal) configuration for a periodic transmission, and transmits the SRS in a randomly determined subframe from among a plurality of SRS subframes determined on the basis of the SRS configuration. | 12-11-2014 |
20140369262 | METHOD FOR TRANSMITTING CHANNEL QUALITY INFORMATION BASED ON DIFFERENTIAL SCHEME - A method for transmitting channel quality information based on a differential scheme is disclosed. When channel quality information of a predetermined number of sub-bands selected by a receiver in a frequency selective channel is transmitted, total average channel information is transmitted. Channel information of the selected sub-bands is transmitted as sub-band differential information associated with average channel information. In this case, the sub-band differential information may be denoted by a specific value contained in a differential-value range including only positive (+) values. If at least two channel quality information is transmitted by a MIMO system, channel quality information of one channel is transmitted, then channel quality information of the other channel is transmitted as spatial differential information. In this case, the spatial differential information is denoted by a specific value contained in a differential-value range asymmetrical on the basis of “0”. | 12-18-2014 |
20150016388 | METHOD OF TRANSMITTING SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a sounding reference signal includes generating a physical uplink control channel (PUCCH) carrying uplink control information on a subframe, the subframe comprising a plurality of SC-FDMA (single carrier-frequency division multiple access) symbols, wherein the uplink control information is punctured on one SC-FDMA symbol in the subframe, and transmitting simultaneously the uplink control information on the PUCCH and a sounding reference signal on the punctured SC-FDMA symbol. The uplink control information and the sounding reference signal can be simultaneously transmitted without affecting a single carrier characteristic. | 01-15-2015 |
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 |
20150063293 | REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N−1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M−1’ of the M antennas are mapped to the second subframe. | 03-05-2015 |
20150063478 | REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A reference signal transmission method in a downlink MIMO system is disclosed. The downlink MIMO system supports a first UE supporting N transmission antennas among a total of M transmission antennas (where M>N) and a second UE supporting the M transmission antennas. The method includes transmitting, by a base station (BS), subframe-associated information which designates a first subframe in which data for the first UE and the second UE is transmitted and a second subframe in which data only for the second UE can be transmitted within a radio frame having a plurality of subframes, and transmitting the first subframe and the second subframe. Reference signals corresponding to antenna ports ‘0’ to ‘N−1’ of the N antennas are mapped to the first subframe, and reference signals corresponding to antenna ports ‘0’ to ‘M−1’ of the M antennas are mapped to the second subframe. | 03-05-2015 |
20150071238 | METHOD AND AN APPARATUS FOR PROVIDING CHANNEL QUALITY INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method for transmitting channel quality information for a downlink channel. The method according to one embodiment includes receiving, by a User Equipment (UE), configuration information on periodic channel state information (CSI) reporting by higher layer signaling; and determining, by the UE, a channel quality information index at least based on a UE-specific reference signal overhead. The UE-specific reference signal overhead is determined according to a rank value. The method according to the one embodiment further includes transmitting the determined channel quality information index to a base station. The channel quality information index is determined further based on an assumption of no resource element allocated for a Channel Status Information-Reference Signal (CSI-RS). | 03-12-2015 |