Closed-loop Transmission power control method and radio base station apparatus

A radio base station apparatus comprising:

• a reception quality measuring section configured to measure reception quality and an interference level of a signal received in uplink;
• a control interval determining section configured to initially set a time period for averaging reception quality corresponding to an overlapped size of a region of overlapping a first reception-allowable range depended on reception capability of a base station apparatus, with a second reception-allowable range depended on the number of a modulation and coding scheme set, each set achieving required throughput, and configured to define the overlapped size corresponding to the measured interference level to vary the time period, corresponding to the defined overlapped size;
• a transmission power control section configured to average the reception quality during the time period varied in the control interval determining section to generate transmission power control information indicative of uplink transmission power to be controlled in a terminal apparatus using a difference value between the averaged reception quality and target reception quality;
• and
• a transmission section configured to transmit the transmission power control information generated in the transmission power control section in downlink.