Patent application number | Description | Published |
20080279296 | 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 can be simply generated. Furthermore, control information can be transmitted with a low error rate by using the generated code. | 11-13-2008 |
20090168904 | 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 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. | 07-02-2009 |
20090175231 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system that supports a resource block group (RBG) allocation scheme, when consecutively allocated virtual resource blocks are distributively mapped to physical resource blocks, a gap for the distribution is determined to be a multiple of a square of the number of consecutive physical resource blocks constituting an RBG. | 07-09-2009 |
20090175361 | 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 20 rows and A columns corresponding to length of the information bits includes, channel-coding the information bits having “A” length using basis sequences having 20-bit length corresponding to columns of the code generation matrix. If “A” is 10, individual basis sequences of the code generation matrix correspond to column-directional sequences of a specific matrix composed of 20 rows and 10 columns. The specific matrix is made from 20 rows of the (32,10) code matrix used for TFCI coding were selected. | 07-09-2009 |
20090310475 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system that supports a resource block group (RBG) allocation scheme, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, there is proposed a mapping method capable of increasing the number of distributed virtual resource blocks to a maximum while satisfying gap limitations, when the length of the physical resource blocks is different from the length of the distributed virtual resource blocks. Also, the number of distributed virtual resource blocks and the structure of an interleaver are limited for efficient scheduling. | 12-17-2009 |
20090310476 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to N | 12-17-2009 |
20090316758 | METHOD FOR TRANSMITTING DATA USING FREQUENCY HOPPING SCHEME AND METHOD FOR DETERMINING A SUB-BAND FOR THE FREQUENCY HOPPING - A frequency hopping scheme in a communication system using a plurality of sub-carriers is disclosed. A sub-band for frequency hopping is set and the frequency hopping scheme is applied using the set sub-band. The frequency hopping scheme is applied in the communication system by assigning a virtual index to a resource block including one or more sub-carriers and transforming the virtual index according to a specific rule to acquire a virtual index of a next resource block for the frequency hopping. | 12-24-2009 |
20100005351 | METHOD OF RETRANSMITTING DATA IN A MOBILE COMMUNICATION SYSTEM - A communication method according to an automatic repeat request scheme in a mobile communication system includes transmitting a retransmission packet per certain time period (periodically) in response to NACK of a first user equipment related to a first packet transmitted within a frame group consisting of a plurality of successive frames, and transmitting a retransmission packet non-periodically in response to NACK of a second user equipment related to a second packet transmitted within the frame group. | 01-07-2010 |
20100074211 | METHOD FOR RETRANSMITTING DATA IN THE MULTI-CARRIER SYSTEM - A method for modifying a synchronous non- adaptive retransmission scheme to solve the limitation of the synchronous non-adaptive retransmission scheme is disclosed. A method for indicating not only the new data transmission but also the retransmission using a data scheduling message is disclosed. A method for determining whether there is an error in the ACK signal transmitted from a data reception end using another message to -be received later is disclosed. The retransmission method for a multi-carrier system includes: receiving a grant message including scheduling information for transmitting uplink data wherein a retransmission scheme for the uplink data is predetermined by a first retransmission scheduling, transmitting the uplink data according to the scheduling information and retransmitting the uplink data according to second retransmission scheduling by receiving the second retransmission scheduling information associated with the uplink data with retransmission request. | 03-25-2010 |
20100074237 | METHOD FOR TRANSMITTING AND IDENTIFYING TRANSMIT POWER VALUE IN MULTI-USER MIMO - A method for transmitting and identifying a transmit power value in a multi-user MIMO scheme is disclosed. The transmit power value transmission method includes calculating available transmit power ratios for respective layers, reducing a number of bits used to represent entire transmit power ratio values by allocating same bit value to a plurality of same transmit power ratio values among the calculated transmit power ratio values for the respective layers; quantizing a transmit power ratio values of symbols to be transmitted to the UE using the entire transmit power ratio values of the reduced number of bits; and transmitting the quantized transmit power ratio values to the UE. | 03-25-2010 |
20100098019 | METHOD FOR TRANSMITTING CONTROL SIGNAL USING EFFICIENT MULTIPLEXING - Methods of transmitting a control signal using efficient multiplexing are disclosed. One of the method includes the steps of multiplexing a plurality of 1-hit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-bit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced. | 04-22-2010 |
20100098020 | METHOD FOR TRANSMITTING DOWNLINK CONTROL SIGNAL - A method of transmitting a downlink control signal is disclosed, by which localized allocation and distributed allocation are efficiently used in transmitting a downlink control signal. The present invention includes multiplexing the downlink control signal in a manner of if there exists downlink data transmission to a prescribed UE, applying localized allocation to a transmission of the downlink control signal including the scheduling information on the uplink data transmission of the UE and applying distributed allocation to another transmission of the downlink control signal and transmitting the multiplexed downlink control signal. | 04-22-2010 |
20100103881 | METHOD FOR TRANSMITTING CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM - In a mobile communication system using both a discontinuous transmission scheme and a compressed mode transmission scheme, if a preamble and/or a postamble of a channel including control information for transmitting a specific channel overlaps a compressed mode (CM) gap, an overall transmission unit is not transmitted or remaining signals of the transmission unit excluding the preamble and/or the postamble overlapping the CM gap are transmitted. | 04-29-2010 |
20100111031 | METHOD FOR TRANSMITTING CONTROL SIGNAL USING EFFICIENT MULTIPLEXING - A method of transmitting a control signal using efficient multiplexing is disclosed. The present invention includes the steps of multiplexing a plurality of 1-bit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-hit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced. | 05-06-2010 |
20100131813 | METHOD FOR SELECTING PMI FOR NON-ADAPTIVE HARQ OPERATION IN A MIMO WIRELESS COMMUNICATION SYSTEM - A method for efficiently acquiring precoding information and transmitting an uplink signal using the precoding information in a User Equipment (UE) in a Multiple Input Multiple Output (MIMO) scheme is disclosed. The UE receives from a Base Station (BS) a scheduling grant signal including precoding matrix information to be used for an uplink signal transmission from the UE, precodes an uplink signal using the precoding matrix information included in the received scheduling grant signal, and transmits the precoded uplink signal initially to the BS. When retransmitting the uplink signal, if a scheduling grant signal is not received for the retransmission from the BS, the uplink signal is precoded and retransmitted using precoding matrix information included in a latest scheduling grant signal received for transmission of an uplink signal having a Hybrid Automatic Repeat reQuest (HARQ) process number equal to an HARQ process number of the uplink signal to be retransmitted. | 05-27-2010 |
20100182988 | SIGNAL TRANSMISSION METHOD USING CDM AGAINST THE EFFECT OF CHANNEL ESTIMATION ERROR IN TRANSMIT DIVERSITY SYSTEM - A method of transmitting a signal using code division multiplexing (CDM) in order to reduce the influence of channel estimation error in a multi-input multi-output antenna (MIMO) system using transmit diversity is disclosed. That is, the method of transmitting a signal by a transmitter using a plurality of antennas includes code division multiplexing input symbols using codes according to a predetermined spreading matrix, and transmitting the code division multiplexed symbols via the plurality of antennas according to an Alamouti scheme. At this time, the predetermined spreading matrix is set such that a first component and a second component configuring interference due to channel estimation error have orthogonal phases. | 07-22-2010 |
20100195612 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system that supports a resource block group (RBG) allocation scheme, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, there is proposed a mapping method capable of increasing the number of distributed virtual resource blocks to a maximum while satisfying gap limitations, when the length of the physical resource blocks is different from the length of the distributed virtual resource blocks. Also, the number of distributed virtual resource blocks and the structure of an interleaver are limited for efficient scheduling. | 08-05-2010 |
20100195662 | METHOD FOR SUB-PACKET GENERATION WITH ADAPTIVE BIT INDEX - A method of generating a sub-packet in consideration of an offset is disclosed. A method of generating a sub-packet in consideration of an offset, for re-transmission of a packet from systematic bits and parity bits stored in a circular buffer includes turbo-coding an input bitstream at a predetermined code rate and generating and storing the systematic bits and the parity bits in the circular buffer, and deciding a starting position of the sub-packet in the circular buffer in consideration of the offset for puncturing at least a portion of the systematic bits of the circular buffer. Accordingly, it is possible to efficiently decide the starting position of the sub-packet to be transmitted adaptively with respect to a variable packet length, improving a coding gain, reducing complexity and reducing a calculation amount. | 08-05-2010 |
20100233968 | METHOD FOR GENERATING AND TRANSMITTING CHANNEL QUALITY INDICATOR BASED ON ADJACENT BAND SELECTION SCHEME - A method of generating and transmitting a channel quality indicator is disclosed, by which a feedback size of channel quality information is reduced. The present invention includes selecting at least one subband by considering a channel quality of each of entire subbands formed by grouping a predetermined number of subcarriers, additionally selecting subbands adjacent to the at least one subband selected in the first selection step, and generating the channel quality indicator corresponding to the subbands selected in the first selection step and the second selection step. | 09-16-2010 |
20100235705 | METHOD FOR RETRANSMITTING DATA IN THE MULTI-CARRIER SYSTEM - A method for modifying a synchronous non-adaptive retransmission scheme to solve the limitation of the synchronous non-adaptive retransmission scheme is disclosed. A method for indicating not only the new data transmission but also the retransmission using a data scheduling message is disclosed. A method for determining whether there is an error in the ACK signal transmitted from a data reception end using another message to be received later is disclosed. The retransmission method for a multi-carrier system includes: receiving a grant message including scheduling information for transmitting uplink data wherein a retransmission scheme for the uplink data is predetermined by a first retransmission scheduling, transmitting the uplink data according to the scheduling information and retransmitting the uplink data according to second retransmission scheduling by receiving the second retransmission scheduling information associated with the uplink data with retransmission request. | 09-16-2010 |
20100239034 | 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. | 09-23-2010 |
20100260057 | METHOD FOR MAPPING CONTROL CHANNELS - A method for mapping control channels is disclosed. This mapping method includes calculating a control channel mapping start time of each cell according to the number of control channel groups allocated to each cell, and performing mapping of repetition of the control channel at intervals of a predetermined distance in order to acquire a diversity gain, wherein the mapping begins from the control channel mapping start time. In this case, control channels of several groups are transmitted in each cell. So, a resource allocation method during transmission of control channels (e.g., PHICH and PCFICH) is improved such that interference between neighboring cells can be reduced, resulting in the improvement of a control channel throughput. | 10-14-2010 |
20100284352 | METHOD FOR TRANSMITTING/RECEIVING ACK/NAK SIGNAL IN AN OFDM COMMUNICATION SYSTEM - A method for receiving an acknowledgement (ACK)/negative acknowledgement (NAK) signal in an orthogonal frequency division multiplexing (OFDM) communication system is described. The method includes receiving ACK/NAK signals and repetitions of the ACK/NAK signals mapped to one or more OFDM symbols which are allocated for transmission of a plurality of ACK/NAK signals within one sub-frame, and confirming receipt of the ACK/NAK signals. The OFDM symbol for each ACK/NAK signal is determined according to the repetition of the ACK/NAK signals, and frequency regions for the ACK/NAK signals within the OFDM symbols are different from frequency regions for the repetition of the ACK/NAK signals within the OFDM symbols. | 11-11-2010 |
20100284363 | FREQUENCY HOPPING PATTERN AND METHOD FOR TRANSMITTING UPLINK SIGNALS USING THE SAME - A frequency hopping pattern and a method for transmitting uplink signals using the same are disclosed. A frequency hopping pattern is defined by combination of subband hopping, which is performed over one or more subbands divided from a system band for transmission of the uplink signals, and mirroring where resource blocks within one subband are arranged reversely based on the center of the subband. Sequences as to whether to apply minoring and subband hopping amount are cell-specific random numbers, and are generated independently or in combination. | 11-11-2010 |
20100290412 | METHOD OF DETERMINING A SIZE OF A DATA PACKET ADVANTAGEOUS FOR TRANSMITTING AND RESTRANSMITTING THE DATA PACKET - A method of determining a transport block size (TBS) allocated to a data packet transmitted via a wireless channel is provided. The TBS is determined according to the number of resource blocks (resource block number) NRB allocated to the data packet and a modulation coding scheme (MCS) level. A part or all of the TBSs allocated to a specific resource block number is determined to have the same value as a part or all of the TBSs allocated to another resource block number. | 11-18-2010 |
20100322182 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system that supports a resource block group (RBG) allocation scheme, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, there is proposed a mapping method capable of increasing the number of distributed virtual resource blocks to a maximum while satisfying gap limitations, when the length of the physical resource blocks is different from the length of the distributed virtual resource blocks. Also, the number of distributed virtual resource blocks and the structure of an interleaver are limited for efficient scheduling. | 12-23-2010 |
20110026478 | METHOD FOR TRANSMITTING UPLINK CONTROL INFORMATION IN WIRELESS MOBILE COMMUNICATION SYSTEM - A method for transmitting control information in uplink from a mobile terminal to a base station in a wireless mobile communication system is provided. In the method, when no data to be transmitted to the base station is present in the mobile terminal, Scheduling Request (SR) information and Channel Quality Indicator (CQI) information having a predetermined size or greater are multiplexed together and the multiplexed information is transmitted to the base station through a Physical Uplink Shared CHannel (PUSCH). This method prevents waste of uplink transmission resources while avoiding uplink data transmission delay. | 02-03-2011 |
20110044270 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to N | 02-24-2011 |
20110051681 | METHOD OF SIGNALING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE FREQUENCY BLOCKS - A method for performing communication in a user equipment of a wireless communication system comprises receiving a control region through a specific frequency block of a plurality of frequency blocks, the control region including a plurality of control channels; identifying a first control channel for the user equipment in the control region; and performing an operation in accordance with information included in the first control channel, wherein the specific frequency block through which the first control channel is transmitted is changed according to a certain pattern with the lapse of time. | 03-03-2011 |
20110058526 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system, for distributed mapping of consecutively allocated virtual resource blocks to physical resource blocks, when nulls are inserted into a block interleaver used for the mapping, they are uniformly distributed to N | 03-10-2011 |
20110064164 | Apparatus And Method For Transceiving Downlink Control Information - A method and apparatus for transceiving Physical hybrid-ARQ indicator channel in a wireless mobile communication system using multi-carriers is disclosed. This method comprises a first reception step of receiving signaling information indicating that a number (N1) of first downlink channels allocated to the first frequency band is 0 through the second frequency band, and a decision step of deciding the number (N1) of first downlink channels allocated to the first frequency band to be 0. | 03-17-2011 |
20110075629 | METHOD FOR USER EQUIPMENT TO PERFORM RANDOM ACCESS TO BASE STATION IN WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS MULTIPLE UPLINK AND DOWNLINK CARRIERS - A method for a user equipment to perform random access to a base station in a wireless communication system that supports multiple uplink and downlink carriers is provided. In the method, system information including cell identifier information of each of the downlink component carriers and PRACH TF slot and preamble sequence information which is common to all downlink component carriers, the system information being broadcast through each downlink component carrier corresponding to the cell identifier information, is received. A PRACH preamble is transmitted through one uplink component carrier linked to the downlink component carriers using the received PRACH TF slot and preamble sequence information. An RACH response is received through each of the downlink component carriers. The cell identifier information is used to transmit a Radio Resource Control (RRC) connection request signal and cell identifier information of a downlink component carrier, which the user equipment desires to access among the downlink component carriers. | 03-31-2011 |
20110077039 | 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, 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. | 03-31-2011 |
20110080888 | 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, 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. | 04-07-2011 |
20110096658 | PRECODING METHOD FOR REDUCING UPLINK PAPR AND APPARATUS THEREOF - A radio communication system is provided. An uplink transmission method of a user equipment in a radio communication system includes performing Fourier transform on one or more data sequences to generate one or more first frequency-domain sequences, applying precoding for multi-antenna transmission to the one or more first frequency-domain sequences to generate one or more second frequency-domain sequences; performing inverse Fourier transform on the one or more second frequency-domain sequences to generate one or more transmission symbols, and transmitting the one or more transmission symbols via multiple antennas. | 04-28-2011 |
20110096745 | METHOD OF TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of, at a base station, transmitting spread signals in a wireless communication system includes spreading a plurality of signals using a spreading code with a predetermined spreading factor, multiplexing a plurality of spread signals to construct one or more spread signal groups, mapping the one or more spread signal groups to one or more specific Control Channel Elements (CCEs) set within one or more Orthogonal Frequency Division Multiplexing (OFDM) symbols, and transmitting the spread signals to User Equipments (UEs) through the one or more CCEs. | 04-28-2011 |
20110098074 | METHOD FOR WIRELESS COMMUNICATION BETWEEN USER EQUIPMENT AND BASE STATION IN WIRELESS COMMUNICATION SYSTEM SUPPORTING FIRST USER EQUIPMENT THAT USES SINGLE FREQUENCY BAND AND SECOND USER EQUIPMENT THAT USES PLURALITY OF FREQUENCY BANDS - A method for wireless communication between user equipments (UEs) and a base station in a wireless communication system that supports a first UE using a single band and a second UE using multiple bands is provided. In the method, UE receives, from the base station, resource allocation information including information regarding a downlink component carrier (CC) and an uplink CC allocated to the UE, receives the allocated downlink CC, and transmits the allocated uplink CC by applying a cell ID thereto. The allocated downlink CC is one of downlink CCs to which different cell IDs are applied, pairs of CCs are predefined by associating uplink CCs respectively with downlink CCs in order to support the first UE. When the allocated downlink and uplink CCs do not belong to the pairs of CCs, the applied cell ID is a cell ID of a downlink CC that is paired with the allocated uplink CC in the predefined pairs of CCs. | 04-28-2011 |
20110134856 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system that supports a resource block group (RBG) allocation scheme, when consecutively allocated virtual resource blocks are distributively mapped to physical resource blocks, a gap for the distribution is determined to be a multiple of a square of the number of consecutive physical resource blocks constituting an RBG. | 06-09-2011 |
20110134857 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system that supports a resource block group (RBG) allocation scheme, when consecutively allocated virtual resource blocks are distributively mapped to physical resource blocks, a gap for the distribution is determined to be a multiple of a square of the number of consecutive physical resource blocks constituting an RBG. | 06-09-2011 |
20110134858 | METHOD FOR SCHEDULING DISTRIBUTED VIRTUAL RESOURCE BLOCKS - A method for efficiently scheduling virtual resource blocks to physical resource blocks is disclosed. In a wireless mobile communication system that supports a resource block group (RBG) allocation scheme, when consecutively allocated virtual resource blocks are distributively mapped to physical resource blocks, a gap for the distribution is determined to be a multiple of a square of the number of consecutive physical resource blocks constituting an RBG. | 06-09-2011 |
20110134861 | METHOD AND DEVICE FOR ALLOCATING RESOURCES IN MULTIPLE FREQUENCY BAND SYSTEM - A method and device for allocating resources in a multiple frequency band system are disclosed. In a method for detecting a resource indication value (RIV) indicating not only a start index (S) of consecutive virtual resource blocks (VRBs) allocated to a first UE capable of simultaneously receiving information from a plurality of frequency bands, but also a length (L) of the consecutive VRBs, in a wireless mobile communication system capable of using the plurality of frequency bands, the method includes receiving, by the first UE, the RIV, and detecting the RIV, wherein the detected is greater than a maximum value usable as an RIV allocated to a second UE capable of receiving information from only one frequency band. | 06-09-2011 |
20110135016 | 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. | 06-09-2011 |
20110149901 | METHOD FOR TRANSMITTING CONTROL SIGNAL USING EFFICIENT MULTIPLEXING - A method of transmitting a control signal using efficient multiplexing is disclosed. The present invention includes the steps of multiplexing a plurality of 1-bit control signals within a prescribed time-frequency domain by code division multiple access (CDMA) and transmitting the multiplexed control signals, wherein a plurality of the 1-bit control signals include a plurality of the 1-bit control signals for a specific transmitting side. Accordingly, reliability on 1-bit control signal transmission can be enhanced. | 06-23-2011 |
20110188438 | 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. | 08-04-2011 |
20110228718 | REFERENCE SIGNAL TRANSMISSION METHOD FOR DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - A method of a reference signal (RS) in a downlink MIMO communication system is disclosed. The method comprises generating a subframe including the RS, and transmitting the generated subframe to an user equipment (UE). RSs of predetermined four antennas among the eight transmitting antennas are mapped into a first OFDM symbol and a second OFDM symbol of the subframe, and RSs of one or more antennas among the eight transmitting antennas are mapped into the other OFDM symbols. The other OFDM symbols are recognized by only a UE that supports the eight transmitting antennas. | 09-22-2011 |
20110235620 | METHOD AND APPARATUS OF TRANSMITTING CONTROL INFORMATION - A wireless communication system is disclosed herein. More specifically, a method of transmitting control information from a user equipment in a wireless communication system is disclosed, wherein the method includes receiving a first transmission timing information for transmitting a first control information associated with one or more first downlink component carriers from a base station; determining a second transmission timing information for transmitting a second control information associated with one or more second downlink component carrier by using the first transmission timing information and an additional transmission timing information; and transmitting control information on the one or more second downlink component carriers in dependence upon the second transmission timing information to the base station. | 09-29-2011 |
20110237270 | METHOD FOR TRANSMITTING REFERENCE SIGNALS IN A DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT SYSTEM - In a system having a plurality of cells participating in a Coordinated Multi-Point (CoMP) operation, a method for transmitting Reference Signals (RSs) to User Equipment (UE) includes generating, by Base Station (BS) included in each of the plurality of cells, a subframe including RSs for a UE located in the each of the plurality of cells, and transmitting the generated subframe to the UE by the BS. The RSs include RSs for channel measurement, and RSs for data demodulation, the plurality of cells are grouped according to frequency shift values applied to the RSs for channel measurement and RS allocation patterns are determined for two cells among the plurality of cells according to a predetermined rule. | 09-29-2011 |
20110243026 | METHOD WHEREBY A CHANNEL QUALITY INDICATOR IS FED BACK BY A TERMINAL IN A MULTIPLE-ANTENNA WIRELESS COMMUNICATION SYSTEM, AND A DEVICE THEREFOR - Disclosed is a method whereby a channel quality indicator is fed back by a terminal in a multiple-antenna wireless communication system. More specifically, the method comprises the steps of: receiving reference signals corresponding to a plurality of data streams from a base station; using the reference signals to calculate a channel quality indicator; and transmitting the calculated channel quality indicator to the base station; and, in the step in which the channel quality indicator is calculated, the channel quality indicator is calculated under the assumption that at least one of the reference signals has been transmitted using wither the spatial-multiplexing technique or the transmit diversity technique, depending on the feedback setting of the terminal. | 10-06-2011 |
20110243087 | METHOD AND APPARATUS OF CONTROLLING UPLINK TRANSMISSION POWER - A wireless communication system is disclosed. Specifically, a method of transmitting signals from a user equipment in a wireless communication system that supports carrier aggregation comprises receiving downlink scheduling information from a base station through a control channel of a first downlink component carrier, the downlink scheduling information including an uplink transmission power control (TPC) command; receiving downlink data from the base station through a shared channel of a second downlink component carrier, the shared channel being connected with the downlink scheduling information; adjusting transmission power of an uplink component carrier corresponding to the first downlink component carrier in accordance with the uplink TPC command; and transmitting acknowledgement (ACK) information of the downlink data to the base station through the uplink component carrier. | 10-06-2011 |
20110243088 | UPLINK ACK/NACK SIGNALING IN CARRIER AGGREGATION ENVIRONMENT - An uplink ACK/NACK signaling method and apparatus in carrier aggregation environment are disclosed. The method for performing a HARQ procedure by a user equipment in a wireless communication system includes receiving one or more control channels carrying downlink scheduling information from a base station (BS), wherein each control channel carries information indicating a total number of control channels transmitted from the BS to the UE, and determining whether the total number of control channels transmitted to the UE is identical to the number of control channels received at the UE. | 10-06-2011 |
20110249601 | METHOD OF TRANSMITTING CONTROL INFORMATION FOR PERFORMING HARQ PROCESS IN WIRELESS COMMUNICATION SYSTEM SUPPORTING PLURALITY OF TRANSMISSION BANDS - A method of transmitting control information for performing a Hybrid Automatic Repeat Request (HARQ) process in a wireless communication system supporting a plurality of transmission bands is disclosed. The method includes generating the control information including HARQ Process Set (HPS) information indicating a specific HPS of a plurality of HPSs corresponding to the plurality of transmission bands, and transmitting the generated control information to a user equipment. A predetermined number of independent HARQ processes is performed according to the plurality of transmission bands. | 10-13-2011 |
20110261776 | UPLINK TRANSISSION IN CARRIER AGGREGATION ENVIRONMENT - The present invention relates to a wireless communication system, and more particularly, to a method of uplink transmission, in which a user equipment transmits a signal in uplink in a wireless communication system. The present invention includes switching an uplink transmission mode used in transmitting the signal to a base station to either a first transmission mode or a second transmission mode, generating a plurality of signals to transmit to the base station via a plurality of component carriers (CCs), and transmitting a plurality of the signals to the base station according to the switched uplink transmission mode, wherein the first transmission mode allows multi-carrier characteristics for the signal transmitted via a plurality of the component carriers and wherein the second transmission mode requests single carrier characteristics for the signals transmitted via a plurality of the component carriers. | 10-27-2011 |
20110268067 | METHOD FOR TRANSMITTING CONTROL INFORMATION TO REQUEST CHANNEL QUALITY INDICATOR IN A WIRELESS COMMUNICATION SYSTEM SUPPORTING MULTIPLE TRANSMISSION BANDWIDTHS - A method for transmitting control information to request a Channel Quality Indicator (CQI) in a wireless communication system supporting a plurality of transmission bands is disclosed. The method includes generating control information including downlink transmission band indication information and CQI request information, the downlink transmission band indication information indicating a downlink transmission band requiring CQI reporting among a plurality of downlink transmission bands and the CQI request information requesting CQI reporting for the downlink transmission band, and transmitting the generated control information on a downlink control channel of a predetermined downlink transmission band among the plurality of downlink transmission bands. | 11-03-2011 |
20110274005 | 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, 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. | 11-10-2011 |
20110274075 | APPARATUS FOR TRANSMITTING UPLINK SIGNAL IN MIMO WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - A method of multiplexing control information and data information in a wireless communication system is disclosed. The present invention includes mapping codewords corresponding to the data information to a preset number of layers, mapping the control information to the preset number of the layers, multiplexing the layer-mapped data information and the layer-mapped control information into a frequency region within an SC-FDMA symbol, and transmitting the SC-FDMA symbol to a base station via multiple antennas. | 11-10-2011 |
20110274079 | 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, 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. | 11-10-2011 |
20110280169 | METHOD FOR CONTROLLING TRANSMISSION POWER, AND APPARATUS FOR SAME - The present invention relates to a radio communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a radio communication system, said method comprising the steps of determining the transmission power for both a first channel and a second channel independently from one another; reducing at least the transmission power of the first channel or the transmission power of the second channel in consideration of a channel priority when the sum of the transmission power of the first channel and the transmission power of the second channel exceeds a maximum transmission power, and transmitting signals at the same time to a base station through the first channel and the second channel. | 11-17-2011 |
20110281601 | METHOD OF MEASUREMENT OVER MULTIPLE DOWNLINK CARRIERS AND APPARATUS THEREFOR - A wireless communication system is disclosed. A method for transmitting channel information by a user equipment (UE) in a wireless communication system, includes receiving a radio frequency (RF) signal from a plurality of downlink component carriers, and reporting a channel measurement result of at least one downlink component carrier from among the plurality of downlink component carriers via an uplink, wherein measurement duration for the reporting is lager a downlink component carrier in a first state than on a downlink component carrier in a second state. | 11-17-2011 |
20110283157 | METHOD FOR TRANSMITTING INFORMATION OF ACK/NACK SEQUENCE IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method for transmitting information of ACK/NACK (Acknowledgement/Negative ACK) sequence from a receiver in a wireless communication system is disclosed. A receiver receives a plurality of data from a transmitter, and determines one ACK/NACK sequence including ACKs/NACKs corresponding to each of the plurality of data. If two or more ACKs are included in the ACK/NACK sequence, the receiver selects a combination of a first HARQ (Hybrid Automatic Repeat reQuest) transmission resource and a first modulation symbol corresponding to a certain ACK of the two or more ACKs, and selects a combination of a second HARQ transmission resource and a second modulation symbol corresponding to ACKs other than the certain ACK of the two or more ACKs. Thus, the receiver transmits each of the first modulation symbol and the second modulation symbol to the transmitter using the first HARQ transmission resource and the second HARQ transmission resource, respectively. | 11-17-2011 |
20110286415 | METHOD OF TRANSMITTING AND RECEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM - A data transmitting method in a wireless communication system is disclosed. In transmitting data by a base station to a user equipment communicating with a plurality of cells in a wireless communication system, the present invention includes receiving, from the user equipment, information on timing differences of signals received by the user equipment from a plurality of the cells, defining a subframe for the user equipment according to the timing differences, and transmitting the data to the user equipment via the defined subframe. | 11-24-2011 |
20110287804 | METHOD FOR CONTROLLING SIGNAL TRANSMISSION POWER AND DEVICE FOR SAME - The present invention relates to a wireless communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a wireless communication system, said method comprising the steps of: checking the maximum transmission power (P_CC_MAX) for each component carrier of a plurality of component carriers, as well as the maximum transmission power (P_UE_MAX) of the terminal; calculating the transmission power for each channel to be simultaneously transmitted to a base station through one or more component carriers; independently adjusting the transmission power for each of the channels so as not to exceed the maximum transmission power (P_CC_MAX) and the maximum transmission power (P_UE_MAX); and transmitting a signal to the base station through the plurality of channels for which the transmission power is adjusted. | 11-24-2011 |
20110292826 | METHOD AND APPARATUS OF CONTROLLING TRANSMISSION POWER - A method of transmitting signals from a transmitter of a wireless communication system comprises determining each transmission power of a first signal and a second signal; if the difference Y in transmission power between the first signal and the second signal exceeds a predetermined value X, adjusting at least one of the transmission powers of the first signal or the second signal so as not to allow the difference in adjusted transmission power to exceed the predetermined value; and simultaneously transmitting the first signal and the second signal to a receiver using the adjusted transmission power. | 12-01-2011 |
20110292900 | METHOD AND APPARATUS OF TRANSMITTING ACK/NACK - The present invention is directed to a wireless communication system is disclosed. More specifically, the present invention is directed to a method of transmitting an ACK/NACK (Acknowledgement/Negative-ACK) signal a user equipment in the wireless communication system, the method includes receiving a first downlink control channel from a base station; receiving scheduling information through a second downlink control channel from the base station; deciding an uplink resource index for transmitting an ACK/NACK signal associated with the scheduling by considering the first control channel when the first control channel has a predetermined format; and transmitting the ACK/NACK signal to the base station by using an uplink resource indicated by the uplink resource index. | 12-01-2011 |
20110292902 | METHOD AND APPARATUS FOR TRANSMITTING ACK/NACK - The present invention is directed to a wireless communication system. Particularly, the present invention is directed to a method and an apparatus of transmitting ACK/NACK (acknowledgement/negative-ACK) signal at a user equipment in a wireless communication system, the method comprising: receiving a plurality of data blocks from a transmitting end; reserving a plurality of PUCCH (physical uplink control channel) resources for transmission of the ACK/NACK signal; mapping ACK/NACK hypothesis for the plurality of the data blocks to a PUCCH resource group including at least two reserved PUCCH resources; and transmitting at least two modulation symbols corresponding to the ACK/NACK hypothesis to the transmitting end via the PUCCH resource group. | 12-01-2011 |
20110305219 | METHOD FOR TRANSMITTING DOWNLINK CONTROL SIGNAL - A method of transmitting a downlink control signal is disclosed, by which localized allocation and distributed allocation are efficiently used in transmitting a downlink control signal. The present invention includes multiplexing the downlink control signal in a manner of if there exists downlink data transmission to a prescribed UE, applying localized allocation to a transmission of the downlink control signal including the scheduling information on the uplink data transmission of the UE and applying distributed allocation to another transmission of the downlink control signal and transmitting the multiplexed downlink control signal. | 12-15-2011 |
20110306335 | METHOD FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - A method of transmitting a sounding reference signal from a user equipment to a base station in a wireless communication system using a plurality of component carriers is disclosed. The present invention includes the steps of checking offset values of a plurality of the component carriers corresponding to a subframe having the sounding reference signal applied thereto from the base station and if the sounding reference signal is transmitted using a certain component carrier of a plurality of the component carriers, transmitting the sounding reference signal to the base station using the certain component carrier in a sub-frame corresponding to the offset value of the certain component carrier. Preferably, the present invention further includes the step of if the sounding reference signals are transmitted using at least two component carriers in the same subframe, transmitting the sounding reference signal having a longest transmission periodicity among the sounding reference signals only. | 12-15-2011 |
20120021756 | CONTROL INFORMATION RECEIVING METHOD IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR - Disclosed is a method for receiving control information by a terminal in a wireless communication system. More specifically, the method comprises the steps of receiving setup information on component carriers which are allocated to a terminal from a base station, determining one of 1 | 01-26-2012 |
20120057559 | METHOD FOR TRANSMITTING A DOWNLINK SIGNAL IN A WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present invention discloses a method in which a base station transmits a downlink signal in a wireless communication system. In detail, the method comprises the following steps: allocating a transmitting resource to data symbols for transmitting downlink signals, in the direction of increasing a frequency index; and transmitting the downlink signal to a terminal, using the allocated resource. The frequency band of preset orthogonal frequency division multiplexing (OFDM) symbols, from among the transmitting resource, contains a control domain and a segment band. The step of allocating the transmitting resource comprises the step of puncturing the data symbol using a control channel, to which the control domain contained in the preset OFDM symbols is allocated. | 03-08-2012 |
20120076105 | COMMUNICATION METHOD USING A CARRIER AGGREGATION AND APPARATUS THEREFORE - The present invention is directed to a wireless communication system. More specifically, the present invention is directed to a method and an apparatus of controlling uplink transmission at a user equipment in a wireless communication system, wherein the user equipment is connected to multiple component carriers, which includes receiving configuration information for transmitting an uplink signal from a base station; and identifying a time for transmitting the uplink signal to the base station on a corresponding uplink component carrier in use of the configuration information, wherein if the corresponding uplink component carrier is in a non-available state at the time for transmitting the uplink signal, the uplink signal is not transmitted. | 03-29-2012 |
20120093197 | METHOD AND APPARATUS FOR TRANSMITTING ENCODED SIGNALS WITH FREQUENCY HOPPING ENVIRONMENT - This document is related to a wireless communication system, and more particularly to a method and an apparatus for transmitting encoded signals with frequency hopping environment. A method of transmitting signals by a user equipment (UE) comprises: encoding an input signal having a length of (A) bits by using (A) basis sequences having a length of 20 bits to output an encoded signal having a length of 20 bits, wherein (A) is a natural number less than 14; mapping the encoded signal having the length of 20 bits to two different resource regions, wherein the first 10 bits of the encoded signal are mapped to a first resource region, and the second 10 bits of the encoded signal are mapped to a second resource region; and transmitting the resource-mapped signals to a Node B, wherein the encoded signal or the (A) basis sequences are cyclic shifted with a value of (x) before mapping the encoded signal to the two different resource regions, wherein (x) is a natural number less than 20. | 04-19-2012 |
20120106460 | CARRIER RECONFIGURATION IN MULTI-CARRIER AGGREGATION - The present invention relates to a wireless communication system which supports carrier aggregation. In detail, the present invention relates to a method and apparatus, wherein a mobile station changes a component carrier (CC) in a wireless communication system that supports carrier aggregation. The method comprises the steps of: receiving, from a base station, a CC reconfiguration command via one or more first preconfigured CCs; reconfiguring, in accordance with the CC reconfiguration command, CC-related information to change one or more first preconfigured CCs to a second CC; and transmitting a signal indicating the completion of CC reconfiguration to the base station after the reconfiguration of the CC-related information. | 05-03-2012 |
20120106491 | TIME-SLOT BASED MULTIPLE ACK/NACK TRANSMISSION - A method of transmitting ACK/NACK (Acknowledgement/Negative-ACK) signal by a user equipment in a wireless communication system comprises receiving a plurality of data unit from a base station; reserving a plurality of physical uplink control channel (PUCCH) resources corresponding to the plurality of data units within a subframe having a plurality of slots; and transmitting one or more ACK/NACK signals for the plurality of data units to the base station by using at least part of the plurality of PUCCH resources reserved within the subframe, wherein the PUCCH resources through which the one or more ACK/NACK signals are transmitted are selected independently per slot. | 05-03-2012 |
20120106495 | METHOD FOR TRANSMITTING CONTROL INFORMATION AND APPARATUS FOR SAME - A method, related to the present invention, comprises: a step of receiving, from a base station, first component information for transmitting first channel information for a first frequency band; a step of receiving, from the base station, second component information for transmitting second channel information for a second frequency band added to the first frequency band; a step of transmitting the first channel information to the base station in accordance with the first component information; and a step of transmitting the second channel information to the base station in accordance with the second component information. When the point of time of the transmission of the first channel information and the point of time of the transmission of the second channel information coincide with each other, either the first channel information or the second channel information is transmitted in accordance with a predetermined drop rule. | 05-03-2012 |
20120106499 | METHOD OF TRANSMITTING AND RECEIVING CHANNEL BANDWIDTH INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting and receiving channel bandwidth information in a wireless communication system is disclosed, by which backward compatibility can be maintained. The present invention includes transmitting the channel bandwidth information including information on a maximum number of resource blocks available for a mobile station supporting the first system and transmitting information on a number of resource blocks available for a mobile station supporting the second system. | 05-03-2012 |
20140169150 | METHOD FOR MAPPING PHYSICAL HYBRID AUTOMATIC REPEAT REQUEST INDICATOR CHANNEL - A method for mapping a physical hybrid automatic repeat request indicator channel (PHICH) is described. The method for mapping a PHICH includes determining an index of a resource element group transmitting a repetitive pattern of the PHICH, according to a ratio of the number of available resource element groups in a symbol in which the PHICH is transmitted and the number of available resource element groups in a first or second OFDM symbol, and mapping the PHICH to the symbol according to the determined index. In transmitting the PHICH, since efficient mapping is performed considering available resource elements varying with OFDM symbols, repetition of the PHICH does not generate interference between neighbor cell IDs and performance is improved. | 06-19-2014 |