The present invention utilizes a relay station operable to receive, from a base station, a first signal to control transmitting operation of a mobile station and operable to receive a second signal transmitted from said mobile station in accordance with the first signal. The relay station comprises a control unit to generate a control signal affecting said first signal and control transmission of said control signal to said base station, and a reception processing part to receive a radio signal transmitted from said mobile station which transmits said radio signal in accordance with said first signal which is affected by said control signal.