Patent application number | Description | Published |
20090067540 | METHOD FOR CONSTRUCTING RACH PREAMBLE AND METHOD FOR TRANSMITTING RACH SIGNAL - A wireless communication system is disclosed. A method for constructing a RACH preamble according to a cell radius of a base station (BS) irrespective of a guard time (GT) and a method for allocating the RACH preamble are disclosed. A method for constructing a preamble of a random access channel (RACH) includes acquiring time-length information of a predetermined cyclic prefix (CP) for each cell radius of a base station (BS), acquiring sequence time-length information of a single sequence or a repeated sequence, and constructing the preamble using the predetermined CP time-length information and the sequence time-length information, irrespective of a time length of a guard time (GT). | 03-12-2009 |
20090175292 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request is transmitted and the sequence number information included in the received random access response. | 07-09-2009 |
20090175372 | METHOD OF TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting data in a wireless communication system, includes: transmitting first data via a first frame for a first wireless communication system; transmitting second data via a second frame for a second wireless communication system supporting backward compatibility with respect to the first wireless communication system; and transmitting control information with respect to the first and second frames, wherein the control information includes a frame control header (FCH) which indicates information about the second frame by using a reserved bit region of the first frame. | 07-09-2009 |
20090175373 | SYMBOL MAPPING METHOD FOR REPETITION CHANNEL CODING - A symbol mapping method for repetition coding is disclosed. The symbol mapping method comprises performing repetition coding on codeword to output repeated codeword symbols, and mapping the repeated codeword symbols with subcarriers located in different localized resource blocks. According to the embodiments of the present invention, it is possible to obtain maximum reliability in a receiving side by mapping codeword bits with subcarriers to reduce the number of bits having low reliability when a transmitting side uses repetition coding. Also, it is possible to improve decoding throughput and obtain channel diversity. | 07-09-2009 |
20090207784 | RANK FEEDBACK METHOD FOR MULTIPLE-INPUT MULTIPLE-OUTPUT TRANSMISSION - A method for transmitting a plurality of control information through a PUCCH or a PUSCH is disclosed. The method includes transmitting first control information, and transmitting second control information. The transmission of the first control information and the transmission of the second control information are performed in units of one subframe and are performed once per predetermined period, respectively. In a subframe in which the transmission of the second control information is to be simultaneously performed with the transmission of the first control information, the second control information is excluded for transmission or the first and the second information are simultaneously transmitted, according to the configuration of a closed-loop system or an open-loop system. | 08-20-2009 |
20090249158 | METHOD FOR PACKET RETRANSMISSION EMPLOYING FEEDBACK INFORMATION - A method for packet retransmission employing feedback information is disclosed. The method for packet retransmission employing feedback information comprises receiving reception acknowledgement information from a receiver after a transmitter transmits packets, the reception acknowledgement information representing channel status information and decoding success/failure of the packets; and changing a retransmission mode in accordance with the channel status information if the reception acknowledgement information represents decoding failure, and transmitting retransmission packets of the packets in accordance with the changed retransmission mode. Thus, it is possible to improve decoding probability of the receiver and increase efficiency of retransmission. | 10-01-2009 |
20090290662 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 11-26-2009 |
20100046464 | METHOD OF SUPPORTING HETEROGENEOUS MODE IN A WIRELESS COMMUNICATION SYSTEM - A data communication method is disclosed, which can simultaneously support heterogeneous systems in a wireless communication system based on multiple carrier multiple access. For a dual mode between heterogeneous systems, the data communication method includes transmitting control information for a first system mode and a second system mode to a mobile station through a channel resource zone used in the first system mode, and performing data transmission and reception between the system and the mobile station through channel resource zones allocated from the first system mode or the second system mode. | 02-25-2010 |
20100046663 | METHOD FOR GENERATING 2 OR MORE SEQUENCE SET, AND METHOD FOR GENERATING SEQUENCE FOR THE SAME - A method for generating a set of at least two sequences is provided. This method selects at least one sequence from each of at least two sequences based on different lengths, including first and second types of sequences, and generates a set of at least two sequences using the selected sequences. Another method selects at least one sequence from a first type of sequences and at least one sequence from a second type of sequences generated by modulating the first type of sequences using a different type of sequences, and generates the set of at least two sequences using the selected sequences. To generate sequences based on a length corresponding to available subcarriers excluding a DC subcarrier, another method generates sequences such that the sequences are continuously arranged in a region excluding the DC subcarrier using frequency-domain cyclic shift while none of the sequences is allocated to the DC subcarrier. | 02-25-2010 |
20100054235 | METHOD FOR ADJUSTING RACH TRANSMISSION AGAINST FREQUENCY OFFSET - A method for establishing RACH transmission to prepare against the frequency offset is disclosed. The method reduces the length of the RACH preamble even if the frequency offset exists, allows the RACH preamble to include a repeated structure (also called an iterative structure) or to use a specific sequence with less affect on the frequency offset, so that the Node-B can easily detect the RACH preamble. If different conditions are established in a high-speed UE and a low-speed UE, an amount of system overheads can be reduced as compared to another case in which an overall RACH condition has been prescribed for only the high-speed UE irrespective of the low-speed UE. And, the method determines whether the user equipment (UE) can estimate its speed according to the aforementioned RACH setup condition, and prescribes a detailed RACH access method according to the determined result. | 03-04-2010 |
20100067453 | METHOD FOR ALLOCATING PILOTS - There is provided a method for allocating pilots to a sub-frame. The sub-frame includes a plurality of blocks in time domain. The method includes allocating a data demodulation (DM) pilot used for demodulating data to two blocks spaced not contiguous with each other, and allocating a channel quality (CQ) pilot. System capacity can be increased, and degradation of performance incurred by a channel estimation error can be minimized. | 03-18-2010 |
20100208710 | METHOD FOR GENERATING CONTROL CHANNEL AND DECODING CONTROL CHANNEL, BASE STATION AND MOBILE STATION THEREOF - A control channel generation method, a control channel decoding method, and a BS and an MS for implementing the methods are provided. The control channel generation method includes placing a frame control header (FCH) and a MAP within a TTI and generating a control channel for an enhanced communication system at a position after the MAP within the TTI. Another control channel generation method includes generating a control channel for the enhanced communication system and placing an FCH and a preamble at a position after the control channel. These methods enable implementation of an enhanced system that overcomes problems of the legacy system while minimizing influence exerted upon legacy MSs in the case where the base station generates a new control channel for a new MS or where an MS decodes a new control channel. | 08-19-2010 |
20100220618 | METHOD FOR TRANSMITTING CHANNEL INFORMATION AND MOBILE COMMUNICATION TERMINAL - A method for transmitting channel information and a mobile communication terminal are disclosed. The method for transmitting channel information includes requesting, by a mobile station (MS) through a random access channel (RACH), a base station (BS) to allocate a resource for transmitting channel information, if it is determined that transmission of a channel status of a downlink channel is necessary as a result of monitoring the channel status, and transmitting, from the MS through the RACH to the BS, the channel information which is updated according to the channel status if the resource allocation is completed. Therefore an existing control channel can be efficiently used, without adding a new control channel for channel quality identifier (CQI) transmission by a mobile station or modifying the configuration of a transmitting stage. Further, signal interference for the existing channels can be prevented when generating a scheduling request. | 09-02-2010 |
20100220645 | METHOD FOR COMMUNICATING WITH RELAY STATION - A method for communicating with a relay station is disclosed. The method for communicating with a relay station comprises transmitting resource allocation information of downlink traffic and uplink traffic from a base station to the relay; and transmitting the downlink traffic to the relay by encapsulating the downlink traffic in accordance with the resource allocation information and receiving encapsulated uplink traffic from the relay in accordance with the resource allocation information. It is possible to enable efficient communication through a relay using a minimum interface without deterioration of throughput even in the case that a base station does not know detailed attributes of a relay existing in a system. Also, it is possible to coordinate collision through a master relay in case of a system supporting multi-hop relays. | 09-02-2010 |
20100227636 | METHOD FOR RANDOM ACCESS BASED ON PRIORITY - A random access method based on priority is disclosed. A priority-based random access method for use in a random access method supporting emergency communication including selecting, by a user equipment (UE), a random access slot corresponding to priority of the UE, among several random access slots to which at least two priorities are allocated, selecting an arbitrary sequence by the UE, and transferring the selected sequence to a base station via the selected random access slot. The method minimizes a UE access delay time requesting emergency communication by assigning priority to resources, and is able to reduce an amount of wasted resources by effectively distributing resources to not only a high-priority UE but also a low-priority UE according to individual situations. | 09-09-2010 |
20100246378 | Method for Signal Mapping and Signal Transmission with Subcarrier Shift Schemes - A signal mapping method and a signal transmission method applying a subcarrier shift method are described. A signal mapping method using shifted subcarriers includes shifting positions of data subcarriers by as much as a frequency band corresponding to half of spacing between data subcarriers on a frequency axis, and shifting positions of random access preamble subcarriers by as much as a frequency band corresponding to half of spacing between the data subcarriers and to a specific ratio of spacing between the random access preamble subcarriers, and mapping data and a random access preamble to the data subcarriers and the random access preamble subcarrier, respectively. Even when the spacing between the data subcarriers is a multiple of the spacing between the random access preamble subcarriers, DC distortion can be minimized. | 09-30-2010 |
20100265897 | METHOD FOR RETRANSMITTING PACKETS ACCORDING TO DECODING FAILURES OR RELIABILITY - A method for retransmitting packets in accordance with decoding failure or reliability is disclosed. A method for retransmitting packets from a transmitting side in accordance with information of a receiving side comprises changing an order of packet symbols mapped with subcarriers, if retransmission information representing decoding success or reliability for a specific codeword is received from the receiving side! mapping the packet symbols with the subcarriers in accordance with the changed order; and transmitting a codeword generated in accordance with the mapped result to the receiving side. Thus, it is possible to improve packet decoding success probability of the receiving side during initial transmission or retransmission by controlling a type of transmission packets in accordance with feedback information of the receiving side. | 10-21-2010 |
20100272055 | METHOD OF MULTIPLEXING MULTIPLE ACCESS REGION - A method for multiplexing one or more multiple access regions is disclosed. The method for multiplexing one or more multiple access regions in a wireless access system comprises multiplexing the one or more multiple access regions so that a first base station and a second base station among a plurality of base stations which use one or more multiple access schemes together under a multi-cell environment use a single multiple access scheme in a predetermined resource region allocated to each of the first base station and the second base station; and transmitting multiplexing information obtained from the multiplexing the one or more multiple access regions to a mobile station included in a cell region of the plurality of base stations. As a user uses SC-FDMA scheme and OFDMA scheme together, it is possible to obtain a single carrier effect of the SC-FDMA system and flexibility of the OFDMA system on a time axis and a frequency axis. | 10-28-2010 |
20100278083 | METHOD FOR ESTABLISHING TIME DOMAIN STRUCTURE OF A FRAME IN A HETEROGENEOUS TDD SYSTEMS ENVIRONMENT - Disclosed in a method for establishing a time domain structure of a frame in a heterogeneous TDD systems environment. In other words, in a situation of coexisting heterogeneous systems comprising a first system corresponding to an existing TDD system and a second system corresponding to a new system, a method is provided for establishing a time domain structure of a second frame for the second TDD system mode to enable it to coexist with a first frame for the first TDD (Time Division Duplex) system mode, that comprises obtaining information for the first supported system type and a first ratio between the downlink region and the uplink region of the first frame structure, and then, according to the obtained information, establishing a second ratio between the downlink region and the uplink region of the second frame structure for the second system. Further, particular numerology is provided for said method. | 11-04-2010 |
20100284339 | METHOD OF TRANSMITTING CYCLIC PREFIX LENGTH INFORMATION - A method of transmitting cyclic prefix length information when wireless access systems having different cyclic prefix lengths coexist is disclosed. The method of transmitting cyclic prefix length information comprises including the cyclic prefix length information in a preamble; and transmitting the preamble to a receiving end, whereby a transmitter can notify the receiving end of a current cyclic prefix length. Also, in a specific interval where a super frame header is defined, a single cyclic prefix length is used in a legacy support mode and a legacy disable mode, and cyclic prefix length information of other data or control channel is included in the super frame header and then transmitted to the receiving end. If different CP lengths are used in a legacy support mode of an evolved system, it is possible to solve a problem in detecting a control channel or a data channel, which may occur as the CP lengths are not distinguished from each other after preamble detection. | 11-11-2010 |
20100284358 | Method for Transmitting Preamble for Legacy Support - A method for transmitting a preamble for legacy support is provided. In a communication system for supporting at least one of a first system corresponding to a legacy system and a second system which corresponds to an evolved system and supports two or more scalable bandwidths, a method for transmitting a preamble for the second system is provided. A preamble sequence is generated on the basis of a smallest bandwidth of the two or more scalable bandwidths, the generated preamble sequence is mapped to a resource zone to have a repetition factor which is relatively prime to a repetition factor of a repetition factor of a preamble for the first system, and the preamble sequence mapped to the resource zone is transmitted as the preamble for the second system. | 11-11-2010 |
20100296436 | METHOD OF TRANSMITTING DATA IN A MOBILE COMMUNICATION SYSTEM - Disclosed is a data transmission method in a mobile communication system. The data transmission method through a code sequence in a mobile communication system includes grouping input data streams into a plurality of blocks consisting of at least one bit so as to map each block to a corresponding signature sequence, multiplying a signature sequence stream, to which the plurality of blocks are mapped, by a specific code sequence, and transmitting the signature sequence stream multiplied by the specific code sequence to a receiver. | 11-25-2010 |
20100296473 | METHOD OF TRANSMITTING AND RECEIVING RADIO CHANNEL - A method for efficiently transmitting and receiving a control channel and/or a data channel in a radio communication system using multiple carriers is described. The embodiments of the present invention provide various multi-carrier system structures and various methods for setting a reference carrier in a multi-carrier system. The embodiments of the present invention also provide methods for efficiently transmitting control channels using a coordination field. | 11-25-2010 |
20110007730 | METHOD OF GENERATING DATA AND TRANSMITTING SYNCHRONIZATION CHANNEL IN MOBILE COMMUNICATION SYSTEM - A method for a transmitting side to transmit a sync channel in a wireless communication system using a multicarrier is disclosed. The present invention includes the steps of generating one synchronization channel including a plurality of sub-synchronization channels and the generated multicarrier symbol to a receiving side via the synchronization channel. Accordingly, the present invention enables the transmitting side to efficiently use a radio resource, thereby raising data transmission efficiency of synchronization channel. | 01-13-2011 |
20110013581 | Method for Channel Allocating in Wireless Access System - A method for allocating uplink and downlink physical channels to improve throughput of a wireless access system is disclosed. A method for allocating channels to optimize a wireless access system which supports radio frequencies comprises configuring one or more physical channels in a transmitter; allocating first physical channels to a receiver considering features of the one or more physical channels; and transmitting one or more control channels to the receiver through a predetermined physical channel of the first physical channels, the control channels including configuration information of the first physical channels allocated to the receiver. | 01-20-2011 |
20110019622 | RANGING STRUCTURE, MULTIPLEXING METHOD AND SIGNALING METHOD FOR LEGACY SUPPORT MODE - A method of performing communication in a wireless communication system is disclosed. In performing ranging, which is performed by a terminal in a wireless communication system supporting a normal scheme and a legacy scheme, the present invention includes selecting a specific ranging structure from a first ranging structure supporting the normal scheme and a second ranging structure supporting the legacy scheme, and transmitting a ranging signal using the specific ranging structure, wherein the first ranging structure and the second ranging structure are set to differ in at least one of a time resource, a frequency resource and a code resource. | 01-27-2011 |
20110038283 | NETWORK ENTRY APPARATUS AND METHOD FOR RELAY STATION USING FULL DUPLEX IN MOBILE COMMUNICATION SYSTEM - A network entry apparatus and method for a Radio Station (RS) using full duplex in a mobile communication system are provided. The method includes performing a capability negotiation procedure including a full duplex function with a BS, performing an authentication and registration procedure with the BS, and performing an operation parameter configuration procedure including a full duplex function with the BS. | 02-17-2011 |
20110038285 | METHOD FOR TRANSMITTING SUB-FRAME DESIGNATION INFORMATION TO A DOWNLINK IN A RADIO COMMUNICATION SYSTEM - A method of transmitting subframe designating information in downlink in a wireless communication system is disclosed. The present invention includes generating the subframe designating information for designating a subframe of a specific type in a radio frame and transmitting the generated subframe designating information to a user equipment, wherein the subframe designating information includes initial location information indicating an initial location of the subframe of the specific type on the radio frame and period information indicating a period for the subframe of the specific type to be repeated. | 02-17-2011 |
20110098070 | METHOD FOR TRANSMITTING PHYSICAL LAYER ID INFORMATION - A method for transmitting IDs of cells of a specific type as physical cell ID information in addition to existing cell ID information is disclosed. For transmission of the physical cell ID information, the number of cell IDs used in transmitting the existing cell ID information on a synchronization channel is increased or a part of existing cell IDs are reserved for transmitting the additional specific-cell ID information. If the number of cell IDs is to be increased, the number of cell ID groups related to a secondary synchronization channel is increased in a manner that removes ambiguity and collision, a cell ID related to a primary synchronization channel is added, which satisfies conjugate symmetry, information is transmitted based on a transmission timing relationship between a primary synchronization code and a secondary synchronization code, or a scrambling scheme is modified. When a part of the existing cell IDs are reserved, conjugate symmetry is also considered in relation to a primary synchronization channel and ambiguity and collision are also considered in relation to a secondary synchronization channel. | 04-28-2011 |
20110110357 | UPLINK TRANSMISSION CONTROL METHOD IN SYSTEM SUPPORTING AN UPLINK MULTIPLE ACCESS TRANSMISSION MODE - Disclosed herein is a method of generating an uplink reference signal in a system supporting a plurality of uplink access schemes. The method includes, at a base station, transmitting reference signal configuration information indicating the configuration of a reference signal to be transmitted in uplink, which is generated according to the plurality of uplink access schemes, to a user equipment which is set to operate in an uplink access scheme corresponding to the information, and receiving a subframe including the reference signal generated based on the reference signal configuration information from the user equipment. The reference signal configuration information includes a cyclic shift value of a sequence of the reference signal. | 05-12-2011 |
20110128901 | METHOD FOR SAVING POWER IN A MULTI-CARRIER WIRELESS ACCESS SYSTEM - A method for saving power in a multi-carrier wideband wireless access system is provided. A method for saving the power of a receiver in a multi-carrier wireless communication system includes acquiring multi-carrier information from a transmitter on a primary carrier, entering one or more secondary carriers satisfying a predetermined power saving mode entry condition out of one or more secondary carriers included in the multi-carrier information into a power saving mode, and receiving data during a listening interval according to the power saving mode on the one or more secondary carriers entering the power saving mode. The multi-carrier information includes at least one of information about a plurality of available carriers, information indicating the primary carrier and the one or more secondary carriers out of the plurality of available carriers, and information about the power saving mode entry condition of the one or more secondary carriers. | 06-02-2011 |
20110128916 | METHOD FOR SELF-CONFIGURING A CELLULAR INFRASTRUCTURE AS DESIRED, AND A DEVICE THEREFOR - The present invention relates to wireless communications system. More specifically, the present invention relates to a method in which a mobile station communicates with any desired node in a wireless communications system. This communications method comprises the steps of: transmitting upwards a first signal for searching for any desired node; receiving from the desired node a second signal indicating that a service can be provided to the mobile station, by way of response to the first signal; and carrying out a procedure for receiving the service from the desired node, wherein the desired node monitors the first signal in a sleep mode. | 06-02-2011 |
20110134747 | Method for Uplink Transmitting Control Information - A method for uplink transmitting control information from a user equipment in a wireless communication system comprises selecting a specific point among a plurality of points distributed into a symbol space, corresponding to control information, the symbol space including a modulation dimension and a sequence dimension; mapping a signal corresponding to the specific point with a control channel including single carrier-frequency division multiple access (SC-FDMA) symbols; and transmitting the control channel. Preferably, the specific point belongs to the sequence dimension. | 06-09-2011 |
20110183609 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 07-28-2011 |
20110189950 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 08-04-2011 |
20110189951 | METHOD FOR GENERATING A REFERENCE SIGNAL SEQUENCE USING GROUPING - Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation. | 08-04-2011 |
20110195720 | METHOD FOR MANAGING IDENTIFICATION INFORMATION OF HETEROGENEOUS CELLS - Described is a method for managing the identification information of a relay station/femtocell/picocell. It is suggested that the identification information of the relay station/femtocell/picocell inherits either a first or second partial cell ID of the identification information allocated to a region that covers the relay station/femtocell/picocell if the identification information of the relay station/femtocell/picocell comprises the first and second partial cell IDs. At this time, the inherited ID may be a sector ID. The first and second partial cell IDs may or may not have a hierarchical structure. | 08-11-2011 |
20110199889 | SEQUENCE-GENERATING METHOD, AND APPARATUS FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a method for enabling a transmitter to transmit a sequence in a wireless communication system, and to an apparatus for the same. A sequence-transmitting method comprises the steps of: performing at least one of a complex conjugate operation and a reverse operation on a first sequence to generate a second sequence; mapping the second sequence to a plurality of subcarriers in an Orthogonal Frequency Division Multiple Access (OFDMA) symbol; and transmitting the OFDMA symbol to a receiver. The invention also relates to an apparatus for the sequence-generating method. | 08-18-2011 |
20110200002 | SIGNAL TRANSMISSION METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM - Provided is a method and device for signal transmission having good PAPR/CM characteristics. With regard to one aspect of said method, the method for transmitting a reference signal in a wireless communication signal comprises a step wherein a reference signal sequence is generated, a step wherein said reference signal sequence is divided with respect to each of multiple sub-blocks, a step wherein each of said plurality of divided reference signal sequence is subject to circular shifting, and a step wherein said plurality of circular shifted reference signals are transmitted via said plurality of sub-blocks. | 08-18-2011 |
20110200143 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL SEQUENCE USING PLURAL ANTENNAS - Disclosed is a method for transmitting a sounding reference signal from a mobile terminal that includes plural antennas. Different plural sounding reference signal sequences that have mutual orthogonality are mapped to each antenna, and then transmitted. Or, the same sounding reference signal sequence is mapped to the plural antennas after precoding or cyclic delay diversity processing, and then transmitted. | 08-18-2011 |
20110201333 | Method for Receiving Control Information in Wireless Communication System and Apparatus Therefor - A method of receiving a control signal by a user equipment in a wireless communication system is disclosed. The present invention includes receiving control regions including the control channel relevant to each of a plurality of component carriers via a plurality of component carriers and detecting the control channel for the user equipment by performing blind decoding by a unit of CCE (control channel element) aggregated at a preset level in a search space included in the control regions. And, start positions of the search spaces in the plurality of component carriers is in a certain relationship. Moreover, the preset level is identically set for each of the plurality of component carriers. | 08-18-2011 |
20110201371 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL IN A WIRELESS COMMUNICATION SYSTEM USING COMP - A method for transmitting a signal to a UE by a BS in a wireless communication system is disclosed. The method includes determining a signal transmission scheme for transmitting a signal to the UE, dividing a basic resource allocation unit, if the signal transmission scheme is CoMP transmission, allocating transmission resources to the UE using the divided basic resource allocation unit, and transmitting the signal to the UE through the allocated transmission resources. | 08-18-2011 |
20110205996 | METHOD OF HARQ ACKNOWLEDGEMENT TRANSMISSION AND TRANSPORT BLOCK RETRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - A method of transport block retransmission in a wireless communication system employing carrier aggregation is disclosed. A method of retransmitting transport blocks in a base station of a wireless communication system employing carrier aggregation comprises mapping each of a plurality of transport blocks to each of a plurality of component carriers using a first mapping pattern and transmitting the plurality of transport blocks to a mobile station; recognizing that the plurality of transport blocks are not transmitted successfully; and mapping each of the plurality of transport blocks to each of the plurality of component carriers using a second mapping pattern and retransmitting the plurality of transport blocks to the mobile station. | 08-25-2011 |
20110206000 | METHOD FOR RANDOM ACCESS TO UPLINK IN MULTI-CARRIER AGGREGATION ENVIRONMENT - The present invention relates to an access method for solving ambiguity between an initial access mobile station and a base station, wherein the ambiguity occurs in a carrier aggregation environment. When a base station transmits a downlink message including different downlink ID information through plural downlink carriers, a base station obtains the corresponding downlink ID information through a downlink carrier used by the mobile station. The mobile station transmits an uplink message using the obtained downlink ID information, and the base station extracts the downlink ID information from the uplink message in order to confirm which downlink carrier the mobile station uses. | 08-25-2011 |
20110211488 | TECHNIQUE FOR SIGNAL TRANSMISSION MODE DETERMINATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention relates to a method for determining the transmission mode in a wireless communication system. More specifically, the present invention relates to a method for transmission mode determination in a wireless communication system, comprising a step wherein feedback information regarding channel status is received, and a step wherein it is determined based on said feedback information whether a transmission signal will be transmitted via each of a fixed number of subcarriers, after applying a propagation sequence. | 09-01-2011 |
20110228735 | METHOD AND BASE STATION FOR TRANSMITTING REFERENCE SIGNALS, AND METHOD AND USER EQUIPMENT FOR RECEIVING REFERENCE SIGNALS - A method and apparatus for multiplexing reference signals in a predetermined number of Code Division Multiplexing (CDM) groups to balance power across Orthogonal Frequency Division Multiplexing (OFDM) symbols are disclosed. In a wireless communication system, orthogonal sequences used for spreading the reference signals are allocated such that the order of orthogonal sequences allocated to a subcarrier of one CDM group has a predetermined offset with respect to the order of orthogonal sequences allocated to a subcarrier of another CDM group, adjacent to the subcarrier of the one CDM group. | 09-22-2011 |
20110255451 | METHOD AND APPARATUS FOR DATA TRANSMISSION USING A DATA FRAME - A method and apparatus for transmitting data using a frame in a broadband wireless communication system are disclosed. The method for transmitting and receiving data in a broadband wireless communication system includes: setting a data frame for transmitting and receiving data through uplink and downlink; and transmitting and receiving data through the set data frame, wherein the data frame includes one or more first subframes and one or more second subframes including a different number of data symbols from that of data symbols of the first subframe. | 10-20-2011 |
20110268032 | METHOD FOR EFFICIENTLY TRANSMITTING PHYSICAL CHANNEL IN MULTI-CARRIER AGGREGATION STATE TO SUPPORT BROADBAND - The present invention relates to a wireless connection system, and more specifically to a method for efficiently transmitting a control channel in a multi-carrier aggregation state. According to one aspect of the invention, a method for enabling a terminal to transmit data in a broadband wireless connection system that supports multiband comprises the steps of: receiving uplink acknowledgement information from a base station through a first downlink component carrier among plural downlink component carriers available in the terminal; transmitting data to the base station through an uplink resource indicated by the uplink acknowledge information; and receiving feedback information from the base station through the first control channel of the first downlink component carrier, wherein the feedback information indicates whether there is an error in the reception of the transmitted data. | 11-03-2011 |
20110268135 | METHOD OF CONSTRUCTING A FRAME BY MULTIPLEXING SUBFRAMES HAVING DIFFERENT CP LENGTH - The present invention relates to a broadband wireless access system, and more particularly, to a frame structure to which OFDM symbols having a cyclic prefix are transmitted. A method of constructing a frame in a broadband wireless access system according to one embodiment of the present invention comprises including one or more first subframes in the frame, the first subframes including a plurality of symbols having a cyclic prefix of a first length; and including one or more second subframes in the frame, the second subframes including a plurality of symbols having a cyclic prefix of a second length different from the first length, wherein the number of the first subframes and the number of the second subframes are determined considering an idle time for which effective symbols are not included in the frame. | 11-03-2011 |
20110274099 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS MOBILE COMMUNICATION SYSTEM - The present invention relates to a method for transmitting control information by a terminal in a wireless mobile communication system using multiple uplink carriers. The method for transmitting control information comprises: multiplexing a first control information to be assigned to a first uplink control channel and a second control information to be assigned to a second uplink control channel; and transmitting the multiplexed first and second control information via an uplink channel that is allocated to one of the multiple uplink carriers. Here, the first uplink control channel and the second uplink control channel are respectively allocated to different uplink carriers. | 11-10-2011 |
20110280203 | METHOD AND APPARATUS FOR INFORMATION TRANSMISSION IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and an apparatus for information transmission that is performed by a transmitter in a wireless communication system. The method comprises the steps of: acquiring a first resource index and a second resource index; generating information sequences based on the first resource index and the second resource index; and transmitting the information sequences via a first antenna and a second antenna, wherein the second resource index is acquired from the first resource index and the offset. | 11-17-2011 |
20110286411 | EFFICIENT INITIAL ACCESS SYSTEM UNDER A MULTI-CARRIER COMBINATION CONDITION FOR SUPPORTING BROADBAND - The present invention relates to a wireless access system, and more particularly, to an initial system under a multi-carrier combination condition. A method of for performing an initial access in a base station which supports the multi-band of a terminal according to one embodiment of the present invention comprises the steps of: searching one or more downlink component carriers of the base station; receiving system information including a broadcast channel of a first downlink component carrier from among the searched one or more downlink component carriers and information for indicating one or more uplink component carriers connected to the first downlink component carrier; transmitting a first message to the base station through a first uplink component carrier from among one or more uplink component carriers indicated by the received system information; and receiving a second message including uplink authorization information from the base station through the first downlink component carrier. | 11-24-2011 |
20110286440 | METHOD FOR TRANSMITTING REFERENCE SIGNAL FOR TERMINAL DEMODULATION IN RADIO MOBILE COMMUNICATION SYSTEM, AND APPARATUS FOR IMPLEMENTING THE SAME - The present invention relates to a method for transmitting a data demodulation reference signal in a radio mobile communication system. The method comprises: a step for generating a sub-frame including the data demodulation reference signal, and a step for transmitting the generated sub-frame. The 1st and 2nd demodulation reference signal pattern groups include plural demodulation signal patterns orthogonal to each other, and are differentiated from each other with regard to time-frequency resources. In the data demodulation reference signal, demodulation reference signal patterns which are respectively orthogonal to each other M (M≦N) and N−M times are respectively included in the 1st and 2nd demodulation reference signal pattern groups if the rank is N. | 11-24-2011 |
20110312326 | METHOD FOR SWITCHING OPERATING CARRIER AT A USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM - The method for switching operating carrier at a user equipment is disclosed. In aspect of the present invention, the user equipment receive target carrier information indicating a target carrier of the UE and target carrier transition time information indicating a time difference between receiving timing of transition indication and transition completion timing from an base station. And the UE may switch from a current operating carrier to the indicated target carrier based on the received the target carrier transition time information and the target carrier information. In case that the target carrier information and the target carrier transition time information is transmitted via a high layer signaling, the UE may transmit ACK/NACK confirm signal indicating whether the target carrier transition time information and the target carrier information is received without error via on the target carrier and the current operating carrier to the base station. | 12-22-2011 |
20110317653 | METHOD FOR ALLOCATING RESOURCE TO UPLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for allocating resource to ACK (Acknowledgment)/NACK (Negative-ACK) transmission in a wireless communication system is disclosed. The method includes receiving scheduling information included in a plurality of downlink control channels and data included in a plurality of downlink data channels, over multiple downlink component carriers from a base station, determining ACK/NACK responses corresponding to the data, and allocating resource to the ACK/NACK responses based on the scheduling information corresponding to each of the plurality of downlink control channels and downlink component carrier-dependent offset values. | 12-29-2011 |
20120002635 | METHOD AND APPARATUS FOR SUPPORTING CARRIER AGGREGATION - The present invention relates to a method and to an apparatus for supporting carrier aggregation. More particularly, the present invention relates to a method for enabling user equipment to receive a signal from a base station in a wireless communication system which supports carrier aggregation, wherein said the method comprises the steps of: setting a first component carrier to a paused state; receiving state change information for the first component carrier via the second component carrier during the paused state of the first component carrier; and monitoring a control channel via the first component carrier if the state change information indicates a predetermined value. The present invention also relates to an apparatus for the method. | 01-05-2012 |
20120008585 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting ACK/NACK (Acknowledgement/Negative ACK) signals in a wireless communication system is disclosed. The method comprises receiving a plurality of data blocks from a base station; generating ACK/NACK signals corresponding to the plurality of data blocks; allocating resources for transmitting ACK/NACK signals, wherein the resources are allocated independently per slot; and transmitting the ACK/NACK signals through one uplink component carrier by using the allocated resources. Preferably, the step of allocating resources includes allocating the resources to minimize the difference in the number of the ACK/NACK signals transmitted per slot. | 01-12-2012 |
20120008586 | DOWNLINK CONTROL INFORMATION RECEIVING METHOD IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - The present invention discloses a method for receiving downlink control information by a terminal in a wireless communication system. More specifically, the method comprises the steps of receiving a coordination field from a base station and receiving control information on more than one component carrier that is allocated to the terminal, on the basis of the coordination field, wherein the coordination field includes more than one parameter for decoding the control information on the more than one component carrier. | 01-12-2012 |
20120014329 | METHOD FOR TRANSMITTING ACK/NACK SIGNAL IN WIRELESS COMMUNICATION SYSTEM APPLIED CARRIER AGGREGATION AND APPARATUS THEREFOR - A method for transmitting ACK/NACK signal in a wireless communication system applied carrier aggregation is disclosed herein. More specifically, the method includes receiving multiple transmission blocks respectively through multiple downlink component carriers from a base station, determining ACK/NACK responses corresponding to each of the multiple transmission blocks by decoding the multiple transmission blocks, mapping the ACK/NACK responses to a ACK/NACK state information, and transmitting the ACK/NACK state information through a single uplink component carrier, wherein ACK information included in the ACK/NACK state information indicates a number of ACK response among the ACK/NACK responses. | 01-19-2012 |
20120015645 | METHOD FOR TRANSMITTING A SYNCHRONOUS CHANNEL AND AN ESSENTIAL CONTROL INFORMATION CHANNEL, AND FEMTO BASE STATION THEREOF - The present invention provides a method for transmitting a synchronous channel and an essential control information channel in a femto base station. The method comprises the steps of: acquiring by the femto base station segment information from a macro base station which overlays the femto base station; discriminating by the femto base station the segment or subcarrier used by the macro base station; and transmitting by the femto base station a synchronous channel and essential control information thereof on the segment or subcarrier different from the segment or subcarrier discriminated in the previous step. | 01-19-2012 |
20120040691 | METHOD FOR DETERMINING POSITION OF USER EQUIPMENT AND APPARATUS FOR PERFORMING SAME IN WIRELESS MOBILE COMMUNICATION SYSTEM - The present invention relates to a method for determining position of a user equipment in a wireless mobile communication system. The method comprises receiving a plurality of subframes including reference signals for positioning of the user equipment from a plurality of base stations periodically with a predetermined period of time; and determining position of the user equipment using reference signal time difference (RSTD) between the reference signals for positioning of the user equipment included in the received plurality of subframes, wherein a pattern of the reference signals for positioning of the user equipment is generated by repeating a diagonal mother matrix with dimension of 6×6, the pattern of the reference signals are mapped to orthogonal frequency division multiplexing (OFDM) symbols of the subframe, and the reference signals for positioning of the user equipment in a OFDM symbol in which common reference signal (CRS) is transmitted are punctured. | 02-16-2012 |
20120044833 | METHOD FOR TRANSMITTING RANGING INFORMATION IN WIRELESS COMMUNICATION SYSTEM AND TERMINAL THEREOF - Disclosed is a method for configuring a ranging channel in various frame structures and using the same in a communication system. A ranging channel is effectively configured according to a data structure, namely, frame structure, transmitted and received between a mobile station (MS) and a base station (BS) in a wireless communication system, and ranging information is transmitted therethrough to thereby improve performance of a communication channel and resource efficiency. In the wireless communication system, a ranging channel is configured by using a time interval, such as an idle time, an idle symbol, an RTG, a TTG, and the like, not actually used for transmission of data or a signal in a data structure, namely, in a frame structure, transmitted and received between an MS and a BS, to transmit ranging information, so the channel performance and resource efficiency can be improved. | 02-23-2012 |
20120044896 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for a terminal for transmitting an uplink control signal, i.e., an ACK/NACK (Acknowledgement/Negative-ACK) signal, in a wireless communication system. In particular, the method comprises: mapping part of the ACK/NACK signals to selection information, which is composed of a combination of message areas and reference signal areas; independently selecting one message area and one reference signal from a plurality of control channel resources that are located in the same resource block, based on the mapped selection information; allocating the selected message area to the other ACK/NACK signals; and transmitting the ACK/NACK signal to a base station by using the selected message area and the selected reference signal area. | 02-23-2012 |
20120044899 | METHOD FOR RECEIVING CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM, AND APPARATUS FOR SAME - The present invention discloses a method in which user equipment receives control information in a wireless communication system adopting carrier aggregation. In detail, the method comprises the steps of receiving a control region via one or more component carriers from among a plurality of component carriers transmitted by a base station, and performing a blind decoding process on the control region to obtain control information allocated to the user equipment, wherein the control region includes control information for said one or more component carriers or control information for the rest of the component carriers. | 02-23-2012 |
20120057498 | METHOD FOR POSITIONING USER EQUIPMENT IN A WIRELESS MOBILE COMMUNICATION SYSTEM, AND APPARATUS FOR PERFORMING THE METHOD - The present invention relates to a wireless communication system, and more particularly, to an apparatus for positioning a user equipment and method thereof. The present invention includes receiving, from a plurality of base stations including a serving cell, a predetermined number of consecutive positioning subframes in a radio frame at a predetermined period, each of the consecutive positioning subframe including a reference signal, measuring a time of arrival of the positioning subframes by using the reference signal, and transmitting a result of the measured time of arrival of the positioning subframe to the serving cell, wherein the predetermined period is set to be larger than a generation period of the reference signal and wherein sequences of the reference signals included in the consecutive positioning subframes are different from each other. | 03-08-2012 |
20120063426 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN RADIO COMMUNICATION SYSTEM - Disclosed is a method for transmitting a sounding reference signal from a terminal to a base station in a radio communication system. More specifically, the method comprises the steps of: receiving a transmission instruction signal for transmitting a non-periodic sounding reference signal from a base station; determining a time resource for transmitting said non-periodic sounding reference signal based on a specific subframe for transmitting the preset periodic sounding reference signal; and transmitting said non-periodic sounding reference signal to the base station using said determined time resource. | 03-15-2012 |
20120069793 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION FROM RELAY NODE ON BACKHAUL UPLINK - According to one embodiment of the present invention, the method for transmitting control information from a relay node to a base station on a backhaul link comprises the steps of: determining whether one time slot of a backhaul uplink subframe from the relay node to the base station is a first type slot having transmitted symbol with guard time set or a second type slot without guard time set; diffusing the control information in a time domain using a first length sequence for the first type slot or a second length sequence for the second type slot; mapping the diffused control information on at least one slot from the first type slot or the second type slot; and transmitting the backhaul uplink subframe having more than one slot from the first type slot or the second type slot wherein the control information is mapped. | 03-22-2012 |
20120069812 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN RADIO COMMUNICATION SYSTEM - Disclosed is a method for transmitting a sounding reference signal from a terminal to a base station in a radio communication system. More specifically, the method comprises the steps of: receiving downlink control information from a base station; checking a flag bit included in said downlink control information; checking an interpretation bit is included in said downlink control information, when said flag bit indicates an uplink; and transmitting an additional sounding reference signal and/or an uplink common channel based on said interpretation bit. | 03-22-2012 |
20120076039 | METHOD AND APPARATUS FOR TRANSMITTING SIGNAL USING SPATIAL SILENCING - The present invention relates to a method for transmitting signals in a heterogeneous network, the method comprising: a step wherein a base station determines a value-added vector for forming a beam pattern to be applied to a subsidiary carrier; a step wherein carrier operation information including information related to the determined value-added vector is transmitted via a primary carrier; and a step wherein the subsidiary carrier is transmitted by applying the determined value-added vector. | 03-29-2012 |
20120076115 | METHOD AND APPARATUS FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN RADIO COMMUNICATION SYSTEM - Disclosed is a method for transmitting a sounding reference signal from a terminal to a base station in a radio communication system to which carrier aggregation is applied. More specifically, the method comprises the steps of: receiving information on a plurality of uplink component carriers for transmitting periodic sounding reference signals from a base station; allocating different time resources for said periodic sounding reference signal transmitted via said plurality of uplink component carriers; and transmitting said periodic sounding reference signals to said base station using said uplink component carriers and said allocated different time resources. | 03-29-2012 |
20120082250 | UPLINK POWER CONTROL METHOD AND APPARATUS IN WIRELESS COMMUNICATION SYSTEM - An uplink power control method and apparatus in a wireless communication system are provided. The uplink power control method in a terminal of a wireless communication system includes mapping one or more codewords to one or more layers, and multiplying the codewords mapped to the layers by a layer power control matrix so as to perform layer power control. | 04-05-2012 |
20120093021 | CELL SEARCHING METHOD AND APPARATUS IN MULTI-CARRIER SYSTEM - Provided are a cell searching method and an apparatus in a multi-carrier system. A terminal acquires a first physical cell identity (PCI) for a first downlink component carrier, and acquires an expanded PCI for a second downlink component carrier. A first downlink reference signal through the first downlink element carrier is transmitted on the basis of the PCI, and a second downlink reference signal through the second downlink component carrier is transmitted on the basis of the expanded PCI. | 04-19-2012 |
20120093090 | METHOD AND APPARATUS FOR UPLINK TRANSMISSION IN MULTI-ANTENNA SYSTEM - Provided are a method and apparatus for uplink transmission in a multi-antenna system. A terminal transmits a plurality of first transmission symbols via a plurality of antennas using a first spatial processing performed on the first transmission symbols, and transmits a plurality of second transmission symbols via a plurality of antennas using a second spatial processing performed on the second transmission symbols. At least one column or at least one row of a first spatial processing matrix used in the first spatial processing is switched to form a second SFBC matrix used in the second spatial processing. According to the present invention, peak-to average power (PAPR)/cubic metric (CM) ratio can be kept at a low level, and imbalanced transmission power among antennas can be evened out. | 04-19-2012 |
20120093120 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNALS IN UPLINK MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) TRANSMISSION - The present invention relates to a wireless communication system, and more particularly, to a method and an apparatus for transmitting reference signals in uplink MIMO transmission. According to one embodiment of the present invention, the method for transmitting uplink signals through a terminal in the wireless communication system comprises the steps of: receiving control information including the information on a cyclic shift and/or an orthogonal cover code; allocating the multiplexed reference signals onto an uplink subframe; and transmitting the subframe through a multi-antenna. When the uplink MIMO transmission is multiuser MIMO transmission, the reference signals of the terminal and the reference signals of other terminals can be multiplexed by using the orthogonal cover code. | 04-19-2012 |
20120093173 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request is transmitted and the sequence number information included in the received random access response. | 04-19-2012 |
20120099520 | SIGNAL TRANSMITTING AND RECEIVING METHOD OF REPEATER AND REPEATER USING THE SAME - The present invention relates to a method for a repeater to transmit and receive a signal on a downlink sub frame in a wireless communication system, comprising the steps of: transmitting a first physical downlink control channel (PDCCH) to terminals positioned within a repeater cell on a downlink sub frame; and receiving a second PDCCH or a physical downlink shared channel (PDSCH) from a base station after a first guard time succeeding a first PDCCH section elapses, wherein a second guard time succeeding the PDSCH or the second PDCCH received from the base station is allocated to the downlink sub frame, and the repeater receives the second PDCCH through a certain range of symbols in accordance with information on the predetermined control channel section, which is received from the base station. | 04-26-2012 |
20120099536 | APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - An apparatus for transmitting and receiving data in a wireless communication system method thereof are disclosed. In a terminal of a wireless communication system, the present invention includes receiving a physical downlink control channel (hereinafter abbreviated PD-CCH), receiving a physical downlink shared channel ((hereinafter abbreviated PDSCH), and demodulating the PDSCH by interpreting the PDCCH according to a type of a subframe including the PDCCH and the PDSCH. | 04-26-2012 |
20120099565 | SYNCHRONIZATION ACQUISITION METHOD AND APPARATUS IN MULTI-CARRIER SYSTEM - Provided are a synchronization acquisition method and apparatus in a multi-carrier system. A terminal acquires the synchronization for a first downlink component carrier by detecting a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in the first downlink component carrier. The terminal acquires the synchronization for a second downlink component carrier by detecting a reference signal in the second downlink component carrier. | 04-26-2012 |
20120106438 | METHOD FOR SENDING AN UPLINK CONTROL SIGNAL ON A WIRELESS COMMUNICATION SYSTEM AND A DEVICE THEREFOR - Disclosed in a method whereby a terminal sends an uplink control signal on a wireless communication system. More specifically, the present invention comprises the steps of generating an uplink control signal, allocating uplink sending resources to the uplink control signal, and sending the uplink control signal to a base station; a time resource in the uplink transmission resources is divided into sub-frame units divided into two slots; at least one of the two slots comprises one reference symbol for transmitting a reference signal; and in the slot comprising the one reference symbol, at least one of a plurality of data symbols for transmitting data signals is dropped. | 05-03-2012 |
20120106493 | APPARATUS AND METHOD FOR TRANSMITTING REFERENCE SIGNALS IN WIRELESS COMMUNICATION SYSTEM - Provided are a method and apparatus for transmitting reference signals in a wireless communication system. A first set of reference signals and a second set of reference signals are generated and mapped to a first resource block (RB) in accordance with a first reference signal pattern and a second RB which is close to the first RB in accordance with a second reference signal pattern. The first RB and the second RB are transmitted from a base station to user equipment. Each of the first reference signal pattern and the second reference signal pattern is formed of one sub-frame and on RB unit. In addition, resource elements (Rs) to which the first set of reference signals and the second set of reference signals are respectively mapped in accordance with the second reference signal pattern are REs to which the second set of reference signals and the first set of reference signals are respectively mapped in accordance with the first reference signal pattern. | 05-03-2012 |
20120113945 | METHOD AND APPARATUS FOR TRANSMITTING ACKNOWLEDGEMENT IN WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting an acknowledgment through a base station in a multi-carrier system. The method for transmitting the acknowledgment through the base station in the multi-carrier system comprises the steps of receiving a plurality of uplink transmission blocks through at least one uplink carrier; determining a downlink channel for transmitting a plurality of ACK/NACK signals corresponding to the transmission blocks on the basis of the at least one uplink carrier; and transmitting the ACK/NACK signals on the determined downlink channel. | 05-10-2012 |
20120113948 | METHOD IN WHICH A RECEIVER TRANSMITS CONTROL INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method in which a receiver transmits control information in a wireless communication system. The method comprises a step of receiving a plurality of data units from a transmitter, a step of determining acknowledgement/negative-acknowledgement (ACK/NACK) states for each of the data units; and a step of transmitting, to the transmitter, the ACK/NACK states in multiple ACK/NACK states or in a single ACK/NACK state in accordance with a predetermined condition. | 05-10-2012 |
20120113951 | Method For Transmitting/Receiving A Comp Reference Singnal - Disclosed is a method for transmitting a CoMP reference signal for accurate channel estimation. The CoMP reference signal to be transmitted to a terminal which performs a CoMP operation in a multi-cell environment is a cell-specific reference signal or a CoMP-zone-specific reference signal. A method for transmitting the cell-specific reference signal uses an ID of a CoMP set constituted by cells that perform a CoMP operation, or does not apply a frequency shift value while using the ID of a relevant cell, or uses an ID of a serving cell or a frequency shift value of the serving cell. The cell-specific reference signal is transmitted using a preset specific resource region. A method for transmitting the CoMP-zone-specific reference signal is configured such that the pattern of the sequence of CoMP reference signals varies in each of the CoMP zones, and the pattern can be set in advance. In addition, the reference signal is multiplexed and transmitted using an orthogonal code resource in the event that reference signal is transmitted to a plurality of terminals using the same CoMP zone. | 05-10-2012 |
20120120905 | METHOD AND DEVICE FOR TRANSMITTING A DOWNLINK REFERENCE SIGNAL IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE ANTENNAS - A method for a base station to transmit a channel-state-information reference signal for up to 8 antenna ports includes mapping, in accordance with a predetermined pattern, the channel-state-information reference signal for up to 8 antenna ports onto a data region of a downlink subframe having an extended cyclic prefix (CP) structure, and transmitting the downlink subframe onto which the channel-state-information reference signal for up to 8 antenna ports has been mapped; and, in the predetermined pattern, the channel-state-information reference signal for up to 8 antenna ports in mapped onto 2 OFDM symbols on the data region of the downlink subframe, with a definition for mapping onto at least one of 4 subcarrier wave positions in each of the 2 OFDM symbols, and the 4 subcarrier wave positions defined in the predetermined pattern can be disposed at 3 subcarrier wave intervals. | 05-17-2012 |
20120127945 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE ANTENNAS - A method for transmitting reference signals for eight or fewer antenna ports includes mapping a portion of common reference signals (CRSs) for four or fewer antenna ports into a downlink subframe including 1 | 05-24-2012 |
20130322381 | METHOD FOR TRANSMITTING AND RECEIVING RANDOM ACCESS REQUEST AND TRANSMITTING AND RECEIVING RANDOM ACCESS RESPONSE - A base station transmits a random access response in response to a random access request (random access preamble) of a user equipment. The random access response includes information about a time when the random access request is transmitted and sequence number information of the random access request (random access preamble). The user equipment checks whether the received random access response is the response of the random access request transmitted by the user equipment, using the information about the time when the random access request transmitted and the sequence number information included in the received random access response. | 12-05-2013 |
20140286233 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL INFORMATION FROM RELAY NODE ON BACKHAUL UPLINK - According to one embodiment of the present invention, the method for transmitting control information from a relay node to a base station on a backhaul link comprises the steps of: determining whether one time slot of a backhaul uplink subframe from the relay node to the base station is a first type slot having transmitted symbol with guard time set or a second type slot without guard time set; diffusing the control information in a time domain using a first length sequence for the first type slot or a second length sequence for the second type slot; mapping the diffused control information on at least one slot from the first type slot or the second type slot; and transmitting the backhaul uplink subframe having more than one slot from the first type slot or the second type slot wherein the control information is mapped. | 09-25-2014 |