Patent ID: 9692573
Date: 2017-06-27
CPC Classifications: H04L,H04W

Claim:
1. A method of reporting channel state information (CSI) in a wireless communication system, the method comprising: receiving a configuration for CSI reporting, the configuration including a periodicity and an offset; determining a subframe in which the CSI is reported among a plurality of subframes according to the configuration; generating the CSI; coding uplink control information (UCI) containing the CSI to generate encoded UCI; modulating the encoded UCI to generate a modulation sequence; and transmitting the modulation sequence in the determined subframe on an uplink channel, wherein, if the CSI includes a rank indicator (RI), a payload size of the CSI is determined according to the RI, wherein, if the CSI does not include the RI, the payload size of the CSI is fixed, wherein, if a sum of a maximum number of bits of a channel quality indicator (CQI) and a maximum number of bits of a precoding matrix indicator (PMI) is larger than a predetermined value and if the CSI does not includes the RI, the payload size of the CSI is limited to the predetermined value, wherein, if a total number of bits of the CSI is smaller than the predetermined value and if the CSI does not includes the RI, the payload of the CSI includes at least one padding bit, wherein the at least one padding bit includes a first padding bit and a second padding bit, and wherein a first remaining bit of a first region for the CQI is padded with the first padding bit, and a second remaining bit of a second region for the PMI is padded with the second padding bit.