INTER-BASE STATION COOPERATIVE MIMO TRANSMISSION METHOD, AND BASE STATION DEVICE

摘要

The present invention inhibits a reduction in the transmission capacity from a mobile station device to all cooperating base stations even if there is no channel status information (CSI) feedback. The inter-base station cooperative MIMO transmission method is characterised in that: in response to the presence or lack of CSI being fed back from a plurality of mobile station devices (MS(MS1,MS2)), a base station device (BS2) assesses a cooperative mobile station device (MS2) which cooperates with another base station device (BS1) and transmits a signal, and an uncooperative mobile station device (MS1) which transmits a signal from the specified base station device (BS1); and a precoding weight is generated for the signals transmitted by the cooperative and uncooperative mobile station devices (MS) on the basis of the abovementioned CSI.