Patent ID: 8780792

Claim:
A mobile station which performs wireless communication with a plurality of base stations, the mobile station comprising: a processing unit configured to perform reception processing of a modulation scheme from at least one of the plurality of base stations respectively, to perform reception processing of transmission data by using the modulation scheme from the at least one of the plurality of base stations respectively, and to perform transmission processing of a reply signal being either of an ACK signal or a NACK signal to the at least one of the plurality of base stations respectively in accordance with whether the transmission data is successfully received or not; and a control unit configured to control the processing unit, during a hard handover from a handover source base station of the plurality of base stations to a handover destination base station of the plurality of base stations, so as to complete transmission processing of the reply signal to the handover source base station and further to start transmission processing of the reply signal to the handover destination base station, after starting reception processing of the modulation scheme from the handover destination base station.