Patent ID: 9148210
Filing Date: 2015-09-29
Classification: H04B,H04W

Abstract:
1. A method for a user equipment in a multiple input multiple output (MIMO) system, the method comprising: transmitting, by the user equipment, rank information at a first transmission periodicity; and transmitting, by the user equipment, first channel quality information (CQI) for a first codeword and a differential value at a second transmission periodicity, the differential value indicating a difference between the first CQI and a second CQI for a second codeword, wherein a period of the first transmission periodicity is longer than a period of the second transmission periodicity, wherein at least the first CQI or the second CQI is set to one of an index value of “0” and a plurality of index values, wherein the index value of “0” indicates a transmission restriction status for the corresponding first or second codeword, and wherein each of the plurality of index values is mapped to a coding rate and a modulation order.