Patent application number | Description | Published |
20080212698 | Method and Apparatus For Allocating a Plurality of Data Symbols in a Wireless Communication System - A method of allocating a plurality of data symbols from a transmitting end using multiple carrier modulation (MCM) is disclosed. More specifically, the method includes receiving the plurality of data symbols from a serial-to-parallel converter, grouping the plurality data symbols into at least one data symbol group, wherein the at least one data symbol group is formed by grouping a specified number of neighboring data symbols, and allocating the at least one data symbol group to at least one subcarrier group, wherein the at least one subcarrier group is formed by grouping a plurality of subcarriers. | 09-04-2008 |
20080229167 | PACKET DATA TRANSMITTING METHOD AND MOBILE COMMUNICATION SYSTEM USING THE SAME - A packet data transmitting method and mobile communication system using the same enables transmission of common ACK/NACK information from each sector of a base station to a user entity in softer handover. The method includes receiving via at least one of the plurality of sectors a data packet from the mobile terminal, the data packet being correspondingly received for each of the at least one of the plurality of sectors; combining the correspondingly received data packets, to obtain a signal having a highest signal-to-noise ratio; decoding the value obtained by the combining; determining a transmission status of the data packet according to the decoding; and transmitting to the mobile terminal a common ACK/NACK signal including one of a common ACK signal and a common NACK signal according to the determining, the common ACK/NACK signal being transmitted via each of the at least one sector. | 09-18-2008 |
20080247474 | Apparatus and Method For Receiving Signals in Multi-Carrier Multi-Carrier Multiple Access Systems - A method for receiving signals in a multi-carrier multiple access system is disclosed. The method comprises receiving signals from at least one base station wherein each signal has a base station identifier, processing the signals to identify each base station by using the base station identifier, performing a channel estimation using the processed signals, combining the processed signals using an information obtained from the channel estimation and decoding the combined signals. Also, an apparatus for receiving signals in a multi-carrier multiple access system comprises a serial-to-parallel converter for converting a serial signal including a base station identifier from at least one base station to parallel signals, a Fast Fourier transformer for transforming the parallel signals, a parallel-to-serial converter for converting the parallel signals to a serial signal, a despreading processor for despreading frequency domain signals using the base station identifier from at least one base station, a channel estimiator for compensating a channel variation between the at least one base station and a mobile station, a signal combiner for combining signals from base stations and a decoder for decoding the combined signal. | 10-09-2008 |
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 |
20080307295 | SIGNAL PROCESSING METHOD IN MIMO SYSTEM AND APPARATUS THEREOF - Disclosed is a signal processing method and apparatus in MIMO system. In a mobile communication system having a plurality of transmitting antennas, the present invention includes the steps of receiving a feedback signal including status information of at least one channel, segmenting one of the first data blocks to segment into at least one or more of the second data blocks, attaching a CRC to each of the at least one or more of the second data blocks, allocating the at least one or more second data blocks to a plurality of the transmitting antennas, respectively, and transmitting the at least one or more of the second data blocks. In a mobile communication system having a plurality of receiving antennas, the present invention includes the steps of receiving at least one data block including a CRC or dummy bits, acquiring channel status information using the CRC or dummy bits, and transmitting the channel status information. | 12-11-2008 |
20090010150 | Apparatus for Band Limiting in Sc-Fdma Communications Systems and Method Thereof - A method for band limiting in a Single Carrier Frequency Division Multiple Access (SC-FDMA) communications system comprises generating a SC-FDMA data symbol block and band-limiting the SC-FDMA data symbol block using a window ( | 01-08-2009 |
20090016266 | METHOD OF TRANSMITTING AND RECEIVING A MESSAGE VIA AN UPLINK CHANNEL IN A WIRELESS MOBILE COMMUNICATION SYSTEM - A method of transmitting a message via an uplink access channel in a wireless communication system is disclosed. The method includes initiating a first preamble access procedure with Node B, receiving from Node B a first acknowledgement indication with respect to the first access preamble procedure, transmitting to Node B a first message upon receipt of the first acknowledgement indication, and receiving from Node B a second acknowledgment indication regarding the first message | 01-15-2009 |
20090041092 | METHOD FOR TRANSMITTING AND RECEIVING DATA IN A MULTI-CARRIER SYSTEM - A method of transmitting data in a multi-carrier communication system is disclosed. More specifically, the method includes mapping at least one data symbol to at least one subcarrier of a first frequency domain and at least one data symbol to at least one subcarrier of a second frequency domain, wherein the first frequency domain and the second frequency domain are mutually exclusive and the at least one data symbol mapped to the at least one subcarrier of the second frequency domain is multiplied by a spreading code, transforming the at least one data symbol mapped to the first frequency domain and the at least one data symbol mapped to the second frequency domain by an inverse discrete Fourier transform (IDFT) module, and transmitting the transformed data symbols to a receiving end. | 02-12-2009 |
20090046647 | METHOD OF GENERATING CHANNEL QUALITY INDICATOR ADAPTIVELY IN DOWNLINE STATUS AND USER EQUIPMENT FOR THE SAME - A method for generating a channel quality indicator (CQI) in a mobile communication system is presented. The method includes grouping a number of subcarriers to form at least one channel quality indicator subband for generating a channel quality indicator, and generating a channel quality indicator in each channel quality indicator subband, wherein a size of each channel quality indicator subband is dependent on a system bandwidth value and is an integer multiple of a downlink frequency resource unit size, wherein the downlink frequency resource unit size is prescribed according to the system bandwidth value. | 02-19-2009 |
20090052470 | METHOD FOR TRANSMITTING PILOT FOR MULTIPLE CARRIER SYSTEM - A method of transmitting pilot signals in a system which performs communication using two or more earners comprises transmitting first pilots and second pilots from at least one user equipment to a base station, the first and second pilots, which are transmitted from the at least one user equipment, being multiplexed by code division multiplexing, and the first and second pilots, which are transmitted from a specific user equipment, having different transmission powers, and transmitting data from the at least one user equipment to the base station depending on the first pilots and the second pilots. Since many UEs can transmit CQ pilots, exact channel estimation can be performed and thus communication efficiency can be improved. | 02-26-2009 |
20090097466 | METHOD FOR TRANSMITTING UPLINK SIGNALS - A method for transmitting uplink signals, which include ACK/NACK signals, control signals other than the ACK/NACK signals, and data signals, is disclosed. The method comprises serially multiplexing the control signals and the data signals; sequentially mapping the multiplexed signals within a specific resource region in accordance with a time-first mapping method, the specific resource region including a plurality of symbols and a plurality of virtual subcarriers; and arranging the ACK/NACK signals at both symbols near symbols to which a reference signal of the plurality of symbols is transmitted. Thus, the uplink signals can be transmitted to improve receiving reliability of signals having high priority. | 04-16-2009 |
20090130986 | METHOD OF TRANSMITTING CHANNEL QUALITY INFORMATION IN MOBILE COMMUNICATION SYSTEM - A method of exchanging channel quality information between a base station and a user equipment in a mobile communication system is disclosed. A method of transmitting channel quality information in a mobile communication system which transmits channel quality information from a user equipment to a base station comprises transmitting channel quality information, which is measured based on a signal received from the base station, to the base station, receiving feedback information of the channel quality information from the base station, and transmitting difference information to the base station, the difference information for matching the channel quality information transmitted from the user equipment with channel quality information received by the base station based on the feedback information. | 05-21-2009 |
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 |
20090240999 | METHOD FOR RESOURCE ALLOCATION IN HARQ - A resource allocation method for use in a system for performing a decoding function by combining an first-transmitted packet with a re-transmitted packet includes: transmitting a packet using N resource blocks (where N=integer >0); receiving a first negative-acknowledgement (NACK) signal for the packet; and re-transmitting the packet using M resource blocks according to the first NACK signal (where M=N >integer >0). Therefore, the resources can be efficiently allocated during the re-transmission. | 09-24-2009 |
20090245399 | METHOD AND APPARATUS FOR INSERTING GUARD INTERVAL IN A MOBILE COMMUNICATION SYSTEM - A method for inserting a guard interval in an OFDM or OFDMA mobile communication system and a transmitting apparatus therefore are disclosed. The method for inserting a guard interval in an OFDM or OFDMA mobile communication system comprises rotating a phase of each symbol for a specific symbol stream, converting the phase-rotated symbol stream into a time-domain symbol stream, and performing at least one of copying a rear part of the time-domain symbol stream to insert the rear part of the time-domain symbol stream to the front of the time-domain symbol stream and copying a front part of the time-domain symbol stream to insert the front part of the time-domain symbol stream to the end of the time-domain symbol stream. | 10-01-2009 |
20090274220 | METHOD FOR TRANSFORMING DATA, AND METHOD FOR TRANSMITTING AND RECEIVING DATA USING THE SAME - A method for transforming data to reduce an amount of data in a communication system equipped with several sub-carriers, and a data transmission method using the same are disclosed. The method for transmitting data using a Discrete Cosine Transform (DCT) in a communication system based on a plurality of sub-carriers includes: a) performing a Discrete Cosine Transform (DCT) on first data; b) selecting a predetermined number of data from among the DCT-processed first data, and performing data processing on the selected data; and c) transmitting the data-processed resultant data to a reception end. A method for reducing an amount of overhead of transmission data for use in the multi-antenna communication system is disclosed. | 11-05-2009 |
20090290653 | METHOD FOR TRANSMITTING PILOT FOR MULTIPLE CARRIER SYSTEM - A method of transmitting pilot signals in a system which performs communication using two or more earners comprises transmitting first pilots and second pilots from at least one user equipment to a base station, the first and second pilots, which are transmitted from the at least one user equipment, being multiplexed by code division multiplexing, and the first and second pilots, which are transmitted from a specific user equipment, having different transmission powers, and transmitting data from the at least one user equipment to the base station depending on the first pilots and the second pilots. Since many UEs can transmit CQ pilots, exact channel estimation can be performed and thus communication efficiency can be improved. | 11-26-2009 |
20090303938 | METHOD OF ALLOCATING WIRELESS RESOURCES IN A MULTI-CARRIER SYSTEM - A method of allocating wireless resources in a wireless communication system is disclosed. More specifically, the method includes allocating distributed chunks to at least one user equipment (UE) on a frequency domain, wherein the distributed chunks are localized chunks which are allocated to the wireless resources according to a distributed allocation scheme, constructing a map for allocating localized chunks in consideration of the allocated distributed chunks, wherein the localized chunks are the localized chunks allocated to the wireless resources according to a localized allocation scheme, and allocating the localized chunks to the at least one UE after all of the distributed chunks are allocated. Here, the distributed chunks and the localized chunks are mutually exclusive. | 12-10-2009 |
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 |
20090316614 | METHOD FOR TRANSMITTING AND RECEIVING DATA USING A PLURALITY OF CARRIERS - Methods for transmitting and receiving data using a plurality of carriers are disclosed. One of the methods comprises multiplexing the multicast/broadcast data and the unicast data in a frame and attaching a pilot signal to the frame. Another of the methods comprises receiving the radio frame including a plurality of data symbols multiplexed multicast/broadcast data with unicast data and retrieving the multicast/broadcast data and the unicast data from the radio frame. | 12-24-2009 |
20090316648 | METHOD OF UPLINK PACKET SCHEDULING AND SUPPORTING THEREOF IN WIRELESS MOBILE COMMUNICATION SYSTEM - A method of uplink packet scheduling in a wireless mobile communications system and method of supporting the same are disclosed, scheduling efficiency can be enhanced in case that one base station schedules uplink packet transmission to a user equipment which is in soft handover with a plurality of base stations. A method of uplink packet scheduling, which is for a user equipment in a soft handover state in a wireless mobile communications system, includes the steps of transmitting a NACK signal in response to an uplink packet transmitted from the user equipment, receiving instruction information for a reception result of the uplink packet in at least one base station from the user equipment or at least one different base station, and performing the uplink packet scheduling for the user equipment by considering the instruction information. | 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 |
20100039928 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK SIGNALS USING MULTI-ANTENNA - A method and apparatus for allowing a UE to transmit uplink signals using a MIMO scheme are disclosed. In order to maintain good Peak power to Average Power Ratio (PAPR) or Cubic Metric (CM) properties when the UE transmits uplink signals using the MIMO scheme, the UE uses a preceding scheme based on a preceding matrix established in a manner that one layer is transmitted to each antenna in specific rank transmission. | 02-18-2010 |
20100061303 | 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. | 03-11-2010 |
20100061332 | PACKET DATA TRANSMITTING METHOD AND MOBILE COMMUNICATION SYSTEM USING THE SAME - A packet data transmitting method and mobile communication system using the same enables transmission of common ACK/NACK information from each sector of a base station to a user entity in softer handover. The method includes receiving via at least one of the plurality of sectors a data packet from the mobile terminal, the data packet being correspondingly received for each of the at least one of the plurality of sectors; combining the correspondingly received data packets, to obtain a signal having a highest signal-to-noise ratio; decoding the value obtained by the combining; determining a transmission status of the data packet according to the decoding; and transmitting to the mobile terminal a common ACK/NACK signal including one of a common ACK signal and a common NACK signal according to the determining, the common ACK/NACK signal being transmitted via each of the at least one sector. | 03-11-2010 |
20100067368 | METHOD FOR IMPLEMENTING TRANSMIT DIVERSITY AT A WIRELESS MOBILE COMMUNICATION SYSTEM ADOPTING SC-FDMA SCHEME - A method for implementing transmit diversity in a wireless mobile communication system adopting an SC-FDMA scheme is provided. A sequence of modulation symbols output from a DFT block are precoded prior to IFFT. The precoding is performed independently on an antenna basis. Modulation symbols mapped to each subcarrier of an SC-FDMA symbol, to be transmitted through each antenna may be additionally phase-shifted. | 03-18-2010 |
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 |
20100080154 | METHOD OF TRANSMITTING REFERENCE SIGNALS IN A WIRELESS COMMUNICATION HAVING MULTIPLE ANTENNAS - A method of transmitting signals by a transmitting end in a wireless communication system comprises sharing control information related to reference signal with a receiving end; generating one or more precoded reference signals considering a given rank; allocating the one or more precoded reference signals to have a specific pattern within a subframe, wherein the specific pattern is varied depending on the control information; and transmitting the subframe through multiple antennas to the receiving end. | 04-01-2010 |
20100098005 | METHOD FOR RECEIVING ACK/NACK SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method for transmitting information of resources for use in transmission of ACK/NACK signals in a mobile communication system is disclosed. An example method for receiving ACK/NACK signals in a mobile communication system is also disclosed. When resources for transmission of data and resources for transmission of control information of the data are scheduled through virtual unit resources, the method identifies information of resources for receiving an ACK/NACK signal for transmission data mapped to information of at least one of a virtual unit resource allocated to the transmission data and a virtual unit resource allocated to control information of the transmission data, and receives the ACK/NACK signal for the transmission data through the information of resources for receiving the ACK/NACK signal. | 04-22-2010 |
20100098015 | METHOD FOR TRANSMITTING AND RECEIVING A SIGNAL TO PROTECT AGAINST ERRONEOUS FEEDBACK INFORMATION - A method for providing precoding weights for data symbols of data control subframes includes generating a downlink frame having control subframes which individually correspond to one of a plurality of downlink data subframes, and inserting weight information into each of the control subframes, such that the weight information is to be applied to data symbols present in the corresponding one of the data subframes. The method further includes transmitting the control subframes and the inserted weight information to a receiving device. | 04-22-2010 |
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 |
20100111065 | METHOD FOR TRANSMITTING DOWNLINK REFERENCE SIGNALS IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - A method for transmitting downlink reference signal in a multi-antenna wireless communication system is disclosed. The method includes allocating RSs for a first antenna group to a subframe having a predetermined area with different access levels for user equipments having different access capabilities, pairing RSs for a second antenna group with RSs for the first antenna group, allocating the paired RSs to the predetermined area of the subframe in code division multiplexing, and transmitting the subframe on the downlink. | 05-06-2010 |
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 |
20100185777 | METHOD AND SYSTEM FOR TRANSMITTING AND RECEIVING DATA STREAMS - A method and system for transmitting and receiving data using a plurality of antennas are disclosed. The method of transmitting includes the steps of receiving feedback information from a receiving end, the feedback information including group selection information and weight values for the plurality of antennas, grouping the plurality of antennas into a plurality of antenna groups based on the group selection information included in the feedback information, and transmitting, to a receiving end, a plurality of data streams through the plurality of antenna groups, respectively, based on the weight values. | 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 |
20100202363 | METHOD OF SCHEDULING FOR ENHANCED DEDICATED CHANNEL (E-DCH) - A method of scheduling for an Enhanced Dedicated Channel (E-DCH) in a user equipment (UE) is disclosed. More specifically, a method of receiving an information indicating an allowable transmit power range from a base station and updating a group of Transport Format Combinations (TFCs) allowed by the base station by selecting the TFCs that can be used within the allowable transmit power range. Furthermore, the method comprises transmitting the E-DCH by at least one TFC selected from the group of TFCs. | 08-12-2010 |
20100215031 | METHOD OF TRANSMITTING PILOT BITS IN A WIRELESS COMMUNICATION SYSTEM - A method of allocating pilot bits in a wireless communication system using a multiple carrier modulation (MCM) is disclosed. The method includes allocating a plurality of precoded data symbols precoded by a precoding matrix module and a plurality of non-precoded pilot bits to a plurality of subcarriers, and transmitting the allocated precoded data symbols and the allocated non-precoded pilot bits. | 08-26-2010 |
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 |
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 |
20100272209 | METHODS OF JOINT CODING IN MOBILE COMMUNICATION SYSTEM - A joint coding method in a mobile communication system is disclosed. To block-code kχ-bit first data requiring a received signal quality and k2˜bit second data requiring a different received signal quality, the present invention includes configuring a first block code generation matrix meeting a first minimum hamming distance, configuring a second block code generation matrix meeting a second minimum hamming distance, and configuring a third block code generation matrix including the first block code generation matrix, the second block code generation matrix and a zero matrix of a specific size. Accordingly, the present invention encodes and transmits two data requiring different received signal qualities by one coding scheme, thereby enabling each data to have the required received signal quality in decoding. | 10-28-2010 |
20100284490 | METHOD FOR TRANSMITTING SIGNALS USING HARQ SCHEME TO GUARANTEE CONSTELLATION REARRANGEMENT GAIN - A method for transmitting signals using a hybrid automatic repeat request (HARQ) scheme to guarantee a constellation rearrangement gain having a predetermined level or more is provided. Predetermined code blocks are encoded, sub-block interleaving is performed with respect to the encoded code blocks, and the sub-block interleaved code blocks are transmitted according to redundancy version (RV) start locations of the sub-block interleaved code blocks. The RVs are set such that the order of bit streams modulated by an M-QAM (M>4) scheme is changed upon a retransmission. In addition, the RVs are set such that the RV start locations applied to code blocks having different sizes are different. | 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 |
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 |
20110085479 | ENCODING UPLINK ACKNOWLEDGMENTS TO DOWNLINK TRANSMISSIONS - A portable device, such as a mobile terminal or user equipment, for encoding uplink acknowledgments to downlink transmissions. The portable device includes a receiver configured to receive a plurality of data blocks, such that each of the data blocks include an associated cyclic redundancy check (CRC), and a processor configured to determine received status for each of the data blocks by checking the CRC of each of the data blocks. The portable device further includes a transmitter for transmitting a response sequence which indicates the received status of all of the data blocks. | 04-14-2011 |
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 |
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 |
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 |
20110149902 | APPARATUS AND METHOD FOR RECEIVING SIGNALS IN MULTI-CARRIER MULTIPLE ACCESS SYSTEMS - A method for receiving signals in a multi-carrier multiple access system is provided. The method includes receiving signals from at least one base station wherein each signal has a base station identifier, processing the signals to identify each base station by using the base station identifier, performing a channel estimation using the processed signals, combining the processed signals using information obtained from the channel estimation and decoding the combined signals. Also, an apparatus for receiving signals in a multi-carrier multiple access system includes a serial-to-parallel converter for converting a serial signal including a base station identifier from at least one base station to parallel signals, a Fast Fourier transformer for transforming the parallel signals, a parallel-to-serial converter for converting the parallel signals to a serial signal, a despreading processor for despreading frequency domain signals using the base station identifier from at least one base station, a channel estimator for compensating a channel variation between the at least one base station and a mobile station, a signal combiner for combining signals from base stations and a decoder for decoding the combined signal. | 06-23-2011 |
20110222501 | METHOD OF TRANSMITTING AND RECEIVING PHYSICAL DOWNLINK SHARED CHANNEL IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting and receiving a physical downlink shared channel in a wireless communication system is disclosed. A method of receiving physical downlink shared channels in a terminal which receives downlink data from a plurality of cells simultaneously in a wireless communication system includes receiving the physical downlink shared channel scrambled using a scrambling sequence determined according to same cell ID and same Radio Network Temporary Identity (RNTI) from the plurality of cells. | 09-15-2011 |
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 |
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 |
20110239074 | ENCODING UPLINK ACKNOWLEDGMENTS TO DOWNLINK TRANSMISSIONS - A portable device, such as a mobile terminal or user equipment, for encoding uplink acknowledgments to downlink transmissions. The portable device includes a receiver configured to receive a plurality of data blocks, such that each of the data blocks include an associated cyclic redundancy check (CRC), and a processor configured to determine received status for each of the data blocks by checking the CRC of each of the data blocks. The portable device further includes a transmitter for transmitting a response sequence which indicates the received status of all of the data blocks. | 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 |
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 |
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 |
20120008707 | METHOD FOR CONTROLLING TRANSMISSION POWER IN A MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM - The present invention relates to a wireless access system, and more particularly, to a method for controlling uplink transmission power in consideration of a transmission rank in a multi-antenna environment. A method for controlling the transmission power of an uplink data channel at a transmitting end which supports a plurality of transmission ranks according to one embodiment of the present invention, comprises the steps of: determining a first transmission power using at least one rank variable dependent on the transmission rank in a specific subframe; comparing the determined first transmission power with a second transmission power which is the preset maximum transmission power; and determining the value judged to be smaller than the result of the comparison to be the transmission power of the data channel. | 01-12-2012 |
20120014242 | METHOD OF ALLOCATING RESOURCES FOR TRANSMITTING UPLINK SIGNAL IN MIMO WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREOF - A method of allocating resources for transmitting a signal in a Multiple-Input Multiple-Output (MIMO) wireless communication system is disclosed. The method includes allocating one or more spatial resources of a plurality of spatial resources corresponding to first Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbols to a first transport block, allocating one or more other spatial resources of the plurality of spatial resources corresponding to the first SC-FDMA symbols to a second transport block, and allocating spatial resources corresponding to second SC-FDMA symbols to the first transport block and the second transport block. | 01-19-2012 |
20120033540 | METHOD FOR GENERATING REFERENCE SIGNAL SEQUENCE IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND APPARATUS FOR SAME - The present application discloses a method in which a base station transmits a reference signal sequence in a wireless communication system. In detail, the method comprises the steps of: generating a pseudo-random sequence using a first m-sequence and a second m-sequence; generating the reference signal sequence using the pseudo-random sequence; and transmitting the reference signal to a mobile station via antenna ports different from one another. The second m-sequence has an initial value containing parameters for discriminating reference signal sequences among users. | 02-09-2012 |
20120057451 | METHOD OF RETRANSMISSION FOR SUPPORTING MIMO IN SYNCHRONOUS HARQ - A method for retransmitting data in synchronous Hybrid Automatic Repeat reQuest (HARQ) to support Multiple Input Multiple Output (MIMO) is disclosed. The method includes transmitting a plurality of unit data blocks to a receiver, receiving from the receiver a control channel signal including first feedback information indicating whether the transmission of the plurality of unit data blocks is successful, and retransmitting at least one of the plurality of unit data blocks according to a predetermined order, each unit data block in one Transmission Time Interval (TTI), if a rank is 1 and the first feedback information indicates that the transmission of the plurality of unit data blocks is failed. | 03-08-2012 |
20120057562 | METHOD FOR RECEIVING DOWNLINK SIGNAL IN MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR - Disclosed in a method for a terminal to receive a downlink signal in a multi user MIMO (MU-MIMO) wireless communication system. More specifically, the method comprises the steps of: receiving downlink control information (DCI) from a base station; obtaining a parameter for a downlink demodulating-reference signal (DM-RS) included in the downlink control information; receiving the downlink DM-RS specified to the terminal on the basis of the parameter; and receiving a downlink data signal on the basis of the downlink DM-RS specified in the terminal, wherein the parameter includes information on a rank which is set in the terminal and a logical antenna port in which the downlink DM-RS is defined. | 03-08-2012 |
20120063438 | METHOD FOR TRANSMITTING DATA BY APPLYING PRECODING MATRIX IN AN OPEN LOOP MIMO SYSTEM - A method for transmitting data by applying a precoding matrix in an open-loop multiple input multiple output (MIMO) system is disclosed. The method comprises selecting a precoding matrix and applying the selected precoding matrix to data during initial transmission; selecting a precoding matrix and applying the selected precoding matrix to data to be retransmitted; and retransmitting the data to which the precoding matrix is applied, wherein an index of the precoding matrix applied to the data is determined based on the times of current retransmission times of the data and index of the precoding matrix applied during initial transmission of the data. | 03-15-2012 |
20130215854 | METHOD FOR TRANSMITTING AND RECEIVING A SIGNAL TO PROTECT AGAINST ERRONEOUS FEEDBACK INFORMATION - A method for providing precoding weights for data symbols of data control subframes includes generating a downlink frame having control subframes which individually correspond to one of a plurality of downlink data subframes, and inserting weight information into each of the control subframes, such that the weight information is to be applied to data symbols present in the corresponding one of the data subframes. The method further includes transmitting the control subframes and the inserted weight information to a receiving device. | 08-22-2013 |
20130250833 | METHOD FOR POWER SAVE MODE OPERATION IN WIRELESS LOCAL AREA NETWORK AND APPARATUS FOR THE SAME - A method for a power save mode operation in a wireless local area network (WLAN) system is provided. The method comprising determining a type of a receiving station (STA) indicator on the basis of the number of STAs which are associated with the AP and which intend to transmit buffered traffic; generating a traffic indicator map (TIM) element including information which indicates the receiving STA indicator and the type of the receiving STA indicator, transmitting the TIM element, receiving a poll frame for requesting data frame transmission from one STA among the STAs and transmitting the data frame to the STA. | 09-26-2013 |
20140247791 | METHOD FOR TRANSMITTING AND RECEIVING A SIGNAL TO PROTECT AGAINST ERRONEOUS FEEDBACK INFORMATION - A method for providing precoding weights for data symbols of data control subframes includes generating a downlink frame having control subframes which individually correspond to one of a plurality of downlink data subframes, and inserting weight information into each of the control subframes, such that the weight information is to be applied to data symbols present in the corresponding one of the data subframes. The method further includes transmitting the control subframes and the inserted weight information to a receiving device. | 09-04-2014 |
20140301325 | PACKET DATA TRANSMITTING METHOD AND MOBILE COMMUNICATION SYSTEM USING THE SAME - A packet data transmitting method and mobile communication system using the same enables transmission of common ACK/NACK information from each sector of a base station to a user entity in softer handover. The method includes receiving via at least one of the plurality of sectors a data packet from the mobile terminal, the data packet being correspondingly received for each of the at least one of the plurality of sectors; combining the correspondingly received data packets, to obtain a signal having a highest signal-to-noise ratio; decoding the value obtained by the combining; determining a transmission status of the data packet according to the decoding; and transmitting to the mobile terminal a common ACK/NACK signal including one of a common ACK signal and a common NACK signal according to the determining, the common ACK/NACK signal being transmitted via each of the at least one sector. | 10-09-2014 |