| 摘要 |
A base station transmits CSI-RS pattern information which indicates the pattern (hereinafter, a CSI-RS pattern) of a time-frequency pattern for a downlink multiple reference signal (hereinafter, CSI-RS) for channel measurement among time-frequency patterns, and CSI-RS sub frame information which indicates a sub frame where the CSI-RS pattern is generated. The CSI-RS transmits a sub frame (hereinafter, a CSI-RS sub frame) corresponding to the CSI-RS sub frame information, to the CSI-RS pattern based on the CSI-RS information and the CSI-RS sub frame information. The time-frequency resource corresponding to each of the time-frequency patterns is located in OFDM symbols 0, 1, 2 and 4 of slot 0 among OFDM symbols in the CSI-RS sub frame, and two OFDM symbols excluding OFDM symbols 0, 1, 2 and 4 of slot 1. So, interference between cells can be minimized. |
