Patent ID: 8971272
Filing Date: 2015-03-03
Classification: H04B

Abstract:
1. A method of adaptively feeding back, by a terminal, channel information relating to multi-cell cooperative communication, the method comprising: measuring average signal-to-noise ratio of virtual multi-antenna channels between the terminal and one or more cell, the average signal-to-noise ratio being transmitted to a base station; receiving, from the base station, a number of allowable feedback bits and cooperative communication information determined on the basis of the average signal-to-noise ratio; selecting a codebook from a plurality of predetermined codebooks on the basis of the number of allowable feedback bits and the cooperative communication information; and quantizing channel information on the virtual multi-antenna channels using the selected codebook, and transmitting feedback information including the quantized channel information to the base station, wherein the codebook is selected to transmit the feedback information using the entire number of allowable feedback bits.