发明名称 |
Method and apparatus for transmitting feedback request and method and apparatus for receiving feedback request in wireless communication system |
摘要 |
A method for transmitting a feedback request in a wireless communication system is provided. The method includes: transmitting feedback request control information to a user equipment (UE), wherein the feedback request control information includes a MIMO (Multi-Input Multi-Output) feedback bitmap indicating at least one MIMO feedback mode to be applied to the UE and a common parameter, and the common parameter comprises a parameter commonly requested for the UE to generate feedback information in the at least one MIMO feedback mode. |
申请公布号 |
US8750270(B2) |
申请公布日期 |
2014.06.10 |
申请号 |
US201113028174 |
申请日期 |
2011.02.15 |
申请人 |
LG Electronics Inc. |
发明人 |
Lee Wook Bong;Ihm Bin Chul;Chun Jin Young |
分类号 |
H04L1/12;H04L1/00;H04L1/16 |
主分类号 |
H04L1/12 |
代理机构 |
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代理人 |
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主权项 |
1. A method for transmitting a feedback request in a wireless communication system, the method performed by a base station (BS) and comprising:
transmitting feedback request control information to a user equipment (UE), wherein the feedback request control information includes a MIMO (Multi-Input Multi-Output) feedback bitmap and common parameters, the MIMO feedback bitmap indicating at least one MIMO feedback mode to be applied to the UE among 8 different MIMO feedback modes, wherein the 8 different MIMO feedback modes are classified as including 4 closed loop (CL) MIMO feedback modes used for a closed loop feedback and 4 open loop (OL) MIMO feedback modes used for an open loop feedback and the 8 different MIMO feedback modes are also classified as including 4 subband channel quality indicator (CQI) MIMO feedback modes requesting a subband CQI and 4 wideband CQI MIMO feedback modes requesting a wideband CQI, wherein the common parameters included in the feedback request control information are the same for at least two MIMO feedback modes among the 8 different MIMO feedback modes, wherein the common parameters comprise a parameter regarding a codebook for selecting a precoding matrix index (PMI) to be fed back by the UE when the MIMO feedback bitmap indicates at least one of the 4 CL MIMO feedback modes, and wherein the common parameters comprise a parameter indicating a number of subbands as targets for generating a subband CQI when the MIMO feedback bitmap indicates at least one of the 4 subband CQI MIMO feedback modes.
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地址 |
Seoul KR |