COMMUNICATION APPARATUS AND CONTROL INFORMATION RECEIVING METHOD

摘要

In a base station, a control unit and a data size regulation unit control the data size of downstream assignment control data and upstream assignment control data in the PDCCH signal based on the communication format used between the base station and a terminal, the number of base station antennas (M) (nonnegative number), the number of terminal antennas (N) (nonnegative number), the bandwidth of the downstream band, and the bandwidth of the upstream band. Specifically, the control unit determines it is unnecessary to adjust the aforementioned data size when the selected communication format is first established between multiple antennas and when where there are multiple for one of M and N and only one for the other. The quality of downstream assignment control data is prevented from degrading, while preventing the number of blind determinations from increasing on the receiving side of the downstream control channel signal.

主权项

1. A communication apparatus communicating with a base station, the communication apparatus comprising:
a receiving section configured to receive first control information including downlink resource assignment information, and to receive second control information including uplink resource assignment information; and a size determining section configured to determine a size of control information, wherein, when at least one of (i) a number of antenna port(s) of the communication apparatus and (ii) a number of antenna port(s) of the base station is one, the size is determined such that: a size of the second control information with a format including no precoding matrix indicator (PMI) is equal to a size of the first control information with a format including no PMI; anda size of the second control information with a format including the PMI and a size of the first control information are not made the same.