The present approach is applied to a case where, in a radio communication system including a mobile station and a plurality of base stations that communicate with the mobile station in subframe units, each of the plural base stations makes the downlink transmission power to become lower by restricting downlink signals in particular subframes. Herein, the mobile station, if it is a mobile station that cannot designate two types of subframes for performing CQI measurement, calculates a single type of CQI in the cell formed by the base station without recognizing the particular subframes that the base station transmitted and transmits the calculated CQI value to the base station. Each of the plural base stations, when receiving a CQI value from the mobile station, corrects the CQI value into two types if the mobile station is a mobile station that cannot designate two types of subframes for performing CQI measurement.