Patent ID: 9680624
Date: 2017-06-13
CPC Classifications: H04B,H04L

Claim:
1. A base station, comprising: a transmit path circuitry configured to transmit an uplink grant to a subscriber station, the uplink grant indicating a first modulation and coding scheme (MCS) value for a first codeword transmission and a second MCS value for a second codeword transmission; and a receive path circuitry configured to receive a multiple-input multiple-output (MIMO) uplink subframe from the subscriber station, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for the second codeword transmission, wherein rank indication (RI) information is mapped onto both the first subset of layers and the second subset of layers, and channel quality information (CQI) is mapped onto either the first subset of layers or the second subset of layers, and wherein if the first MCS value is different from the second MCS value, the CQI is mapped onto the subset of layers having a higher MCS value.