Patent ID: 9602177
Date: 2017-03-21
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method for transmitting channel status information (CSI) via uplink in a wireless communication system, the method performed by a user equipment (UE) comprising: transmitting, in a first subframe, a rank indicator (RI); and transmitting, in a second subframe, a wideband channel quality indicator (WB CQI), a first wideband precoding matrix indicator (WB PMI), and a second WB PMI, wherein total bits used for the transmission of the first WB PMI and the second WB PMI are 4 bits when the RI indicates rank-1, rank-2, rank-3 or rank-4, and wherein total bits used for the transmission of the first WB PMI and the second WB PMI are transmitted by using 2 bits when the RI indicates rank-5, rank-6 or rank-7.