Method for reporting channel state information in wireless communication system, and device for same
摘要
說明書
In the case where the precoding matrix indicator (PMI) payload for Type II CSI feedback varies greatly depending on the RI, when reporting CSI using PUSCH resources, there may be a problem that all the corresponding information cannot be included within a limited reporting container size. In addition, since the RI is set by the UE, in terms of the base station, there may be limitations in scheduling resource allocation by accurately predicting the PMI payload for CSI reporting.
For this problem, in the prior art, a method of dropping a plurality of reporting settings for a plurality of component carriers (CC) of part2 CSI according to a predetermined priority rule is used in a CSI omission procedure. The base station may calculate the corresponding information by estimating the remaining omitted subband (SB) PMI in an interpolation method based on the received PMI. In order to actually determine the payload of the UCI part2 transmitted by the UE, the base station performs the same CSI omission process as the UE until the UCI code rate reaches a specific level. Therefore, only when a common method for the CSI omission is set/defined between the UE and the base station, the information of the UCI part 2 may be properly decoded by the base station.
