Patent ID: 9172448
Filing Date: 2015-10-27
Classification: H04B,H04L

Abstract:
1. A base-station apparatus in communication with a terminal apparatus, comprising: a higher layer circuit configured to provide, to the terminal apparatus, a first codebook subset restriction information which indicates a precoder which is not allowed for a precoding matrix indicator reporting and a second codebook subset restriction information which indicates a precoder which is not allowed for a precoding matrix indicator reporting; and a reception circuit configured to receive a first channel state information report based on the first codebook subset restriction information and a second channel state information report based on the second codebook subset restriction information, wherein the reception circuit is configured to receive, based on a downlink control information for the terminal apparatus, the first channel state information report or the second channel state information report, and the first channel state information report is based on a first channel state information reference signal, and the second channel state information report is based on a second channel state information reference signal.