DATA TRANSMISSION METHOD, BASE STATION DEVICE, AND MOBILE STATION DEVICE

摘要

The data rate in MIMO transmission is increased to a maximum even when a number of transmitting antennas of a base station apparatus is different from the number of transmitting antennas of the base station apparatus supported by a mobile station apparatus. The base station apparatus (eNodeB) reports the number of transmitting antennas provided for the base station apparatus to the mobile station apparatus UE (ST11). The mobile station apparatus UE compares the reported number of transmitting antennas with a maximum number of supported antennas of the base station apparatus (eNodeB) supported by the mobile station apparatus UE, selects the smaller number of antennas as a number of virtual antennas (ST12), and reports the number of virtual antennas to the base station apparatus (eNodeB) (ST13). The base station apparatus (eNodeB) transmits a data channel signal in accordance with the reported number of virtual antennas (ST15).