Patent application number | Description | Published |
20100027409 | Method for transmitting control signal - There is provided a method of enabling a user equipment to transmit a control signal to a base station. The method includes allocating a control signal to a control region on a subframe, the subframe comprising the control region for the control signal and a data region for user data, wherein different frequency bands within the control region are allocated to different user equipments, and transmitting the subframe in uplink direction. A control signal can be robustly transmitted under variance of channel condition. | 02-04-2010 |
20100067461 | METHOD OF TRANSMITTING CONTROL SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting control signals in a wireless communication system includes multiplexing a first control signal with a second control signal in a slot, the slot comprising a plurality of orthogonal frequency division multiplexing (OFDM) symbols in time domain, the plurality of OFDM symbols being divided into a plurality of data OFDM symbols and a plurality of reference signal (RS) OFDM symbols, wherein the first control signal is mapped to the plurality of data OFDM symbols after the first control signal is spread by a base sequence in the frequency domain, the RS is mapped to the plurality of RS OFDM symbols, the second control signal is mapped to at least one of the plurality of RS OFDM symbols, and transmitting the first control signal and the second control signal in the slot. | 03-18-2010 |
20100091755 | METHOD OF TRANSMITTING SCHEDULING REQUEST IN A WIRELESS COMMUNICATION SYSTEM - A method of transmitting a scheduling request which is used to request a radio resource for uplink transmission includes configuring an uplink control channel for transmission of a scheduling request in a subframe, the subframe comprising two consecutive slots, a slot comprising a plurality of single carrier-frequency division multiple access (SC-FDMA) symbols, the scheduling request being carried by presence or absence of transmission of the uplink control channel, and transmitting the scheduling request on the uplink control channel. | 04-15-2010 |
20100226324 | METHOD OF TRANSMITTING CONTROL SIGNALS IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting a control signal includes transmitting a random access preamble on a random access channel (RACH) resource in a subframe, wherein the RACH resource includes a preamble period which is a time for transmitting the random access preamble and a cyclic prefix (CP) period which is a time for transmitting a CP, and transmitting a sounding signal on a single carrier-frequency division multiple access (SC-FDMA) symbol subsequent to the RACH resource in the subframe. | 09-09-2010 |
20100261472 | METHOD FOR PERFORMING CELL SEARCH PROCEDURE IN WIRELESS COMMUNICATION SYSTEM - A method for performing a cell search procedure by a user equipment in a wireless communication system includes receiving a primary synchronization signal (PSS), and obtaining a correlation value of the PSS to detect a multimedia broadcast multicast service (MBMS) indicator indicating whether a service is a dedicated MBMS. Accordingly, whether the service is the dedicated MBMS is indicated using a primary synchronization signal or a secondary synchronization signal used in an initial cell search process, and whether the service is the dedicated MBMS can be known without additional complexity. Therefore, cell search of a user equipment can be more effectively performed. | 10-14-2010 |
20100272210 | METHOD OF TRANSMITTING DATA FOR DIGITAL BROADCASTING IN WIRELESS COMMUNICATION SYSTEM - A method of transmitting data in a wireless communication system includes mapping first data to first symbols on a signal constellation, mapping second data assisting the first data to second symbols on the signal constellation, modulating the first symbols and the second symbols, and transmitting the modulated first symbols and the second symbols, wherein the distance between the first symbols is longer than that between the second symbols on the signal constellation. | 10-28-2010 |
20110019694 | Preamble Generation Method for Random Access in a Wireless Communication System - A method for generating a preamble for a random access in a wireless communication system is provided. The method includes: dividing a preamble sequence into sequence subsets each corresponding to each of a plurality of antennas; and generating a preamble by using the sequence subsets corresponding to each of the plurality of antennas. A method for generating a preamble for a random access supporting multiple antennas in a wireless system can be provided. | 01-27-2011 |
20110064042 | METHOD AND APPARATUS FOR TRANSMITTING DATA IN MULTIPLE CARRIER SYSTEM - A method and apparatus for transmitting data in a multiple carrier system is provided. The method includes receiving an uplink resource assignment comprising a carrier indicator through one of a plurality of downlink carriers, and transmitting uplink data in a resource assigned by the uplink resource assignment through the uplink carrier indicated by the carrier indicator. | 03-17-2011 |
20110070850 | PREAMBLE TRANSMISSION METHOD IN A MULTIPLE ANTENNA SYSTEM - A method of transmitting a preamble for synchronization in a multiple-antenna system includes applying a masking sequence to a plurality of preambles, and transmitting each of the plurality of preambles, to which the masking sequence is applied, through each of a plurality of transmit antennas. In a multiple-antenna system, deterioration of reception performance for a preamble can be reduced. | 03-24-2011 |
20110090986 | METHOD FOR TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - A data transmission method in a wireless communication system is provided. The method includes allocating a plurality of pilot resources for supporting pilot transmission through a plurality of antennas, and if there are residue pilot resources not used in the pilot transmission among the plurality of pilot resources, transmitting data by using the residue pilot resources. | 04-21-2011 |
20110126071 | METHOD AND APPARATUS OF TRANSMITTING INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus of transmitting information in a wireless communication system are provided. The method includes transmitting first information based on a first resource index through a first antenna and transmitting second information based on a second resource index through a second antenna. | 05-26-2011 |
20110134902 | METHOD OF TRANSMITTING DATA USING SPATIAL MULTIPLEXING - A data transmission method using spatial multiplexing is disclosed. The data transmission method using spatial multiplexing includes modulating at least one codeword to generate at least one modulation symbol, mapping the at least one modulation symbol to a layer whose number is determined according to its rank to generate a layer-mapped symbol stream, performing discrete Fourier transform (DFT) on the layer-mapped symbol stream to generate a frequency domain symbol stream, performing precoding on the frequency domain symbol stream, mapping the precoded frequency domain symbol stream to subcarriers, and then performing inverse fast Fourier transform (IFFT) on the precoded frequency domain symbol stream-mapped subcarriers to generate SC-FDMA symbols; and transmitting the SC-FDMA symbols by using a plurality of transmission antennas. Spatial multiplexing having a low PAPR can be possibly performed in an SC-FDMA system. | 06-09-2011 |
20110142000 | METHOD AND APPARATUS FOR THE TRANSMISSION OF A CONTROL SIGNAL IN A RADIO COMMUNICATION SYSTEM - The present invention provides a method and an apparatus for the transmission of control signal in a radio communication system. The method includes the steps of processing first control information on the basis of a first resource index to create a first control signal, processing second control information on the basis of a second resource index to create a second control signal, and transmitting the first control signal and the second control signal. | 06-16-2011 |
20110142076 | DATA TRANSMISSION METHOD USING STBC SCHEME - A data transmission method using a space time block code (STBC) scheme is provided. The method includes generating a modulation symbol by performing coding and constellation mapping on an information bit, generating a frequency-domain symbol by performing discrete Fourier transform (DFT) on the modulation symbol, generating a single carrier-frequency division multiple access (SC-FDMA) symbol by performing inverse fast Fourier transform (IFFT) after mapping the frequency-domain symbol to a subcarrier, and transmitting the SC-FDMA symbol on a slot basis. | 06-16-2011 |
20110170489 | METHOD AND APPARATUS OF TRANSMITTING INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus of transmitting information in a wireless communication system are provided. The method includes transmitting information based on a first resource index through a first antenna and transmitting the information based on a second resource index through a second antenna. | 07-14-2011 |
20110194501 | COMMUNICATIONS METHOD AND DEVICE IN A MULTI-CARRIER SYSTEM - A communication method and apparatus using multiple carriers are provided. A primary carrier is configured, and multi-carrier control information for monitoring a control channel of a secondary carrier is transmitted through the primary carrier. A user equipment monitors a control channel of the secondary carrier on the basis of the multi-carrier control information. | 08-11-2011 |
20110194523 | METHOD AND DEVICE FOR WIRELESS SUBFRAME RESOURCE ALLOCATION - The method for wireless resource subframe allocation comprises the following steps: allocation of the control channel based on the first RAT (Radio Access Technology) of the first control domain, which includes the OFDM symbol of the first number from the sub-frame containing multiple OFDM symbols and multiple subcarriers in the frequency domain; allocation of the control channel based on the second RAT of the second control domain including the OFDM symbol of the second number which follows said first control domain; and the allocation of a data channel in the data domain which includes the OFDM symbols positioned outside said first control domain and second control domain. This invention provides a sub-frame structure which is compatible with existing wireless communication systems. This method allows the continued use of existing control channel systems or base signal structures. The method is also capable of supporting advanced features. | 08-11-2011 |
20110211489 | Communication Method and Apparatus in Multi-Carrier System - Disclosed is a communication method in a multi-carrier system, including: allocating radio resources for transmitting signals to a middle guard band; and transmitting the signals through the radio resources; wherein the middle guard band is a frequency band positioned between used bands of a plurality of carriers, respectively, within an aggregated carrier formed by aggregating the plurality of carriers and a unit allocating the radio resources of the middle guard band is different from a unit allocating the radio resources of the used bands. A multi-carrier system uses the guard bands between the carriers to improve channel estimation performance or increase efficiency of radio resources. | 09-01-2011 |
20110211522 | Method and Apparatus for Performing HARQ Process in Wireless Communication System - A method of performing hybrid automatic repeat request (HARQ) by a source station in a wireless communication system is provided. The method includes: transmitting data to a destination station at a transmission start time; receiving an acknowledgment (ACK) or negative-acknowledgement (NACK) signal for the data from the destination station after a first transmission time interval elapses from the transmission start time; and upon receiving the NACK signal, retransmitting the data after a second transmission time interval elapses from the transmission start time, wherein the second transmission time interval is one transmission time interval selected from a plurality of predetermined transmission time intervals. Accordingly, the wireless communication system can perform a heterogeneous HARQ process in which an HARQ period, an ACK/NACK transmission start time, and the like are different. | 09-01-2011 |
20110255501 | Method and Apparatus for Transmitting Data Performed by at Least One Base Station in Wireless Communication System - A method and apparatus for transmitting data performed by at least one base station (BS) in a wireless communication system is provided. First signals are repsectively mapped to a first Orthgonal Frequency Division Multiplexing (OFDM) symbol of a first BS and a second BS, and are transmitted. A second signal, having a θ shifted phase of the first signal, is mappped to a second OFDM symbol, and is transmitted by the first BS. The repective first signals and the second signal are transmitted in a same subcarrier in a frequency domain. | 10-20-2011 |
20110305134 | METHOD AND APPARATUS FOR PERFORMING A HARQ OPERATION IN A MULTI-CARRIER SYSTEM - A method of performing hybrid automatic repeat request (HARQ) of a user equipment (UE) in a multiple-carrier system is provided. The UE transmits uplink data on an uplink carrier. The UE receives acknowledgement (ACK)/not-acknowledgement (NACK) for the uplink data on a downlink carrier associated with the uplink carrier. Accordingly, HARQ can be supported in a multiple-carrier system. | 12-15-2011 |
20120027004 | APPARATUS AND METHOD FOR TRANSMITTING DATA IN A MULTI-ANTENNA SYSTEM - An apparatus for transmitting data in a multi-antenna system is provided. The apparatus includes: a scrambling unit for performing scrambling on an input codeword; a modulator for arranging the scrambled codeword to a modulation symbol that expresses a position on a signal constellation; a transform precoder for performing discrete Fourier transform (DFT) on the modulation symbol to generate a DFT symbol of a frequency domain; a resource element mapper for mapping the DFT symbol to a physical resource element; and a single carrier-frequency division multiple access (SC-FDMA) signal generator for generating an SC-FDMA signal of a time domain from the DFT symbol mapped to the resource element, wherein the modulation symbol is selected in the time domain as a plurality of modulation symbol blocks, and the selected modulation symbol blocks are input to the transform precoder after being combined repetitively. | 02-02-2012 |
20120033588 | METHOD FOR PERFORMING A HARQ OPERATION IN A RADIO COMMUNICATIONS SYSTEM, AND METHOD AND APPARATUS FOR ALLOCATION OF SUBFRAMES - There is provided a method for allocating subframes in a radio communications system that performs communication by using a radio frame including a plurality of subframes, the method including: selecting a backhaul downlink subframe in which a base station is to transmit a signal to a relay station; and allocating the backhaul downlink subframe to a substitution subframe which is not limitation subframes, when the selected backhaul downlink subframe corresponds to one of the limitation subframes, wherein the limitation subframes are subframes in which the relay station is to transmit essential information to a relay user equipment. Therefore, it is possible to overcome a limitation that is present in a link between the base station and the relay station, perform an HARQ operation, and improve the efficiency of radio resource allocation. | 02-09-2012 |