Patent application number | Description | Published |
20080267318 | METHOD FOR TRANSMITTING A SIGNAL IN MULTI-ANTENNA COMMUNICATION SYSTEM - A multi-input multi-output (MIMO) system considers either reliability for each antenna or a time/frequency location, and transmits a signal at an unequal ratio for each antenna according to the consideration result. The method for use in the MIMO system including multiple antennas includes processing a signal according to an unequal ratio transmission scheme employing the multiple antennas at an unequal ratio, and transmitting the processed signal via the multiple antennas. | 10-30-2008 |
20090052405 | METHOD OF TRANSMITTING FEEDBACK DATA IN A MULTIPLE ANTENNA SYSTEM - A method of transmitting feedback data in a multiple antenna system comprises receiving a request message of feedback data on a downlink channel, the request message comprising uplink scheduling information, selecting a set of M (M≧1) subbands within a plurality of subbands, generating the feedback data, the feedback data comprising a frequency selective PMI (preceding matrix indicator), a frequency flat PMI, a best band CQI (channel quality indicator) and a whole band CQI, and transmitting the feedback data on a uplink channel allocated to the uplink scheduling information. | 02-26-2009 |
20100111226 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting control information includes dividing frequency bandwidth into ranges to which the same PMI (precoding matrix index) is applied, obtaining multiple antenna information by the range to which the same PMI is applied and transmitting the multiple antenna information. Since multiple antenna information is transmitted by the unit of a range to which the same PMI is applied, radio resources allocated for transmitting the multiple antenna information may be reduced, thereby enhancing data transmission efficiency. | 05-06-2010 |
20100183086 | METHOD OF TRANSMITTING FEEDBACK DATA IN MULTIPLE ANTENNA SYSTEM - A method of transmitting feedback data in a multiple antenna system includes generating feedback data based on the channel information and transmitting the feedback data at transmission periods, wherein the feedback data is transmitted in a plurality of report types respectively having a different control signal type contained depending on the transmission periods. | 07-22-2010 |
20100272042 | METHOD AND APPARATUS FOR RELEASING UPLINK RADIO RESOURCE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of releasing an uplink radio resource in a wireless communication system, is provided. A user equipment (UE) receives first feedback channel allocation information from a base station (BS), and allocates a uplink radio resource to a feedback channel based on the first feedback channel allocation information. The UE also receives second feedback channel allocation information including an feedback channel release command which indicate the release of the allocated uplink radio resource to the feedback channel, and transmits a release confirm message to the BS through a hybrid automatic repeat request (HARQ) feedback channel (HFBCH) for transmitting a HARQ feedback. the UE releases the allocated uplink radio resource to the feedback channel. | 10-28-2010 |
20100310000 | METHOD OF TRANSMITTING PRECODING INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting precoding information in a multiple antenna system includes selecting M subbands from a plurality of subbands constituting a whole frequency band in a descending order of a channel quality indicator (CQI), where M is an integer satisfying M>0, and transmitting a first precoding matrix indicator (PMI) for the M subbands and a second PMI for a remaining band, wherein the first PMI is a PMI of a codebook selected from a first codebook set including a plurality of codebooks and the second PMI is a PMI of a codebook selected from a second codebook set including a part of the plurality of codebooks of the first codebook set. Accordingly, precoding information can be effectively transmitted by separately preparing a codebook for a best band and a codebook for a non-selected band. | 12-09-2010 |
20100322066 | METHOD AND APPARATUS FOR TRANSMITTING MIDAMBLE IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of transmitting a midamble in a wireless communication system is provided. A base station (BS) generates a midamble sequence for each of a plurality of antennas, and transmits the midamble sequence to a user equipment for each antenna. A location of a subcarrier to which each midamble sequence is mapped is determined based on a frequency reuse factor (FRF). | 12-23-2010 |
20110051629 | METHOD FOR TRANSMITTING FRAME IN WIRELESS COMMUNICATION SYSTEM INCLUDING RELAY STATION - A method of transmitting a frame of a relay station (RS) in a wireless communication system employing the RS is provided. The method includes: receiving frame configuration information on an RS frame from a base station (BS); configuring a frame including a downlink (DL) access zone for transmitting a signal to a relay user equipment (UE), a DL receive zone for receiving a signal from the BS, an uplink (UL) access zone for receiving a signal from the relay UE connected to the RS, a UL transmit zone for transmitting a signal to the BS, and a transition gap; and transmitting a signal in at least one of the UL access zone and the UL transmit zone, wherein the transition gap is a switching time between a transmission operation and a reception operation of the RS and is included in at least one of the DL access zone and the UL transmit zone. | 03-03-2011 |
20110058512 | METHOD OF TRANSMITTING MULTICAST AND BROADCAST SERVICE DATA - A resource allocation method for a Multicast and Broadcast Service (MBS) and a method for transmitting MBS data in a wireless access system are disclosed. The MBS transmission method for a multicast broadcast single frequency network (MBSFN) zone includes, constructing a resource zone by sequentially allocating predetermined symbol areas preferentially on a frequency axis, mapping predetermined MBSs provided from the MBSFN zone to the predetermined symbol areas, and transmitting a first MBS among the predetermined MBSs to mobile stations located at an edge of the MBSFN zone. The first MBS is equal to a second MBS among MBSs provided from a neighbor MBSFN zone. The first MBS and the second MBS are transmitted to the same time zone according to a time division multiplexing (TDM) method. | 03-10-2011 |
20110149890 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus of transmitting an uplink control signal of a mobile station (MS) in a wireless communication system is provided. A mobile station (MS) receives resource allocation information of a first uplink control channel for transmitting an uplink synchronization signal and resource allocation information of a second uplink control channel. The MS allocates a first uplink control channel resource and a second uplink control channel resource to the first uplink control channel and the second uplink control channel respectively based on the resource allocation information of the first uplink control channel and the resource allocation information on the second uplink control channel and transmits an uplink control signal through at least one of the first uplink control channel and the second uplink control channel to a base station. The first uplink control channel resource is located in a first resource unit among a plurality of resource units constituting a logical resource region, and the first uplink control channel resource and the second uplink control channel resource are allocated in that order in the logical resource region. | 06-23-2011 |
20110274199 | METHOD OF TRANSMITTING DATA IN WIRELESS COMMUNICATION SYSTEM - The method includes generating coded bits by encoding information bits, dividing the coded bits into a first bit-stream and a second bit-stream, generating a first data symbol by performing anti-gray mapping on the first bit-stream, generating a second data symbol by performing gray mapping on the second bit-stream, and transmitting the first data symbol and the second data symbol. Reliability of bits can be improved in the first bit-stream and the second bit-stream by using different mapping schemes. | 11-10-2011 |
20120201165 | METHOD OF TRANSMITTING FEEDBACK DATA IN A MULTIPLE ANTENNA SYSTEM - A method of transmitting feedback data in a multiple antenna system comprises receiving a request message of feedback data on a downlink channel, the request message comprising uplink scheduling information, selecting a set of M (M≧1) subbands within a plurality of subbands, generating the feedback data, the feedback data comprising a frequency selective PMI (precoding matrix indicator), a frequency flat PMI, a best band CQI (channel quality indicator) and a whole band CQI, and transmitting the feedback data on a uplink channel allocated to the uplink scheduling information. | 08-09-2012 |
20120269295 | METHOD FOR TRANSMITTING CONTROL INFORMATION IN MULTIPLE ANTENNA SYSTEM - A method of transmitting control information includes dividing frequency bandwidth into ranges to which the same PMI (precoding matrix index) is applied, obtaining multiple antenna information by the range to which the same PMI is applied and transmitting the multiple antenna information. Since multiple antenna information is transmitted by the unit of a range to which the same PMI is applied, radio resources allocated for transmitting the multiple antenna information may be reduced, thereby enhancing data transmission efficiency. | 10-25-2012 |