Patent ID: 8032144

Claim:
A base station comprising: an allocation unit configured to allocate an uplink resource, comprising a frequency resource and a spreading code resource, to be used by a mobile station for transmitting an ACK/NACK signal in response to user data transmitted from the base station to the mobile station; a generating unit configured to generate transmission power information of the ACK/NACK signal; an encoding unit configured to jointly encode first allocation information together with the transmission power information and second allocation information to provide control information including the encoded first allocation information, the encoded transmission power information and the encoded second allocation information that are directed to the mobile station, wherein the first allocation information indicates the uplink resource and the second allocation information comprises downlink resource allocation information and indicates a destination of the user data; a modulating unit configured to modulate the control information; and a transmitting unit configured to transmit, to the mobile station, the modulated control information including the encoded first allocation information, the encoded transmission power information and the encoded second allocation information to be simultaneously transmitted on a control channel and configured to transmit, to the mobile station, the user data on a user channel.