Patent ID: 8014803

Claim:
A mobile communication system including a mobile station and a base station, wherein: the mobile station comprises a storage unit configured to establish a correspondence between an identifier for a downlink Layer-1 control channel associated with a downlink data channel and a frequency block number for an uplink Layer-1 control channel and to store the identifier and the frequency block number; a physical layer parameter determining unit configured to determine a physical channel parameter including the frequency block number for the uplink Layer-1 control channel based on the identifier; an uplink Layer-1 control channel generating unit configured to generate the uplink Layer-1 control channel used for transmitting a result of decoding data on the data channel based on the determined physical channel parameter; and a transmitting unit configured to transmit control information on the generated uplink Layer-1 control channel; and the base station comprises a storage unit configured to establish a correspondence between the identifier for the downlink Layer-1 control channel associated with the downlink data channel and the frequency block number for the uplink Layer-1 control channel and to store the identifier and the frequency block number; a reception quality measuring unit configured to measure reception quality on an uplink propagation path based on a signal transmitted from the mobile station; a downlink Layer-1 control channel generating unit configured to select the physical channel parameter including the frequency block number for the uplink Layer-1 control channel based on the reception quality on the uplink propagation path and generate the downlink Layer-1 control channel associated with the downlink data channel corresponding to the frequency block number; and a transmitting unit configured to transmit control information on the generated downlink Layer-1 control channel.