Channel state information feedback method and user equipment

摘要

A method for feeding back channel state information and user equipment are provided in the present invention, which relates to the digital communication field; and they solve the problem of lacking a mechanism of reporting overall and effective channel state information in a SU-MIMO and MU-MIMO dynamic switching system. The method includes: in a single transmission mode, UE sends the channel state information to a network side, wherein the channel state information includes information indicating a transmission layer with the best channel quality. Technical schemes provided in the present invention are applied to the LTE system and LTE-A system.

主权项

1. A method for feeding back channel state information, comprising:
in a transmission mode of dynamic switching between a Single-User Multiple Input Multiple Output (SU-MIMO) transmission mode and a Multiple-User Multiple Input Multiple Output (MU-MIMO) transmission mode, user equipment (UE) sending the channel state information to a network side, which comprises a Pre-coding Matrix Indicator (PMI) indicating a precoding matrix transmission layer and information indicating for the MU-MIMO transmission mode a transmission layer with the best channel quality among all transmission layers indicated by the precoding matrix, to indicate the network side to send data to the UE by the transmission layer with the best channel quality when the network side determines to adopt the MU-MIMO transmission mode.