Patent ID: 8761286

Claim:
A method for a user equipment (UE) in a Multiple Input Multiple Output (MIMO) system, the method performed by the UE and comprising: measuring first channel quality information (CQI) for a first codeword and second CQI for a second codeword based on one or more received downlink signals; and transmitting the first CQI for the first codeword and the second CQI for the second codeword, wherein at least the first CQI or the second CQI includes information indicating a transmission restriction status for a corresponding codeword when a channel quality for the corresponding codeword is equal to or less than a reference value, wherein the information indicating the transmission restriction status is a SINR (Signal to Interference plus Noise Ratio) of ‘-∞dB’, a coding rate of ‘0’, a modulation order of ‘0’, or a predetermined MCS (Modulation and Coding Selection) level index, and wherein the predetermined MCS level index indicates either the coding rate of ‘0’ or the modulation order of ‘0’.