Patent ID: 6954434

Claim:
A CDMA (Code Division Multiple Access) mobile communication system comprising a base station and a mobile station connected to said base station by radio through reverse-link and forward-link control channels, said base station comprising: monitor means for monitoring a forward-link transmission power value radiated to said mobile station; calculation means for, when the forward-link transmission power value becomes smaller than a predetermined steady output value, calculating system parameter information of said mobile station, which corresponds to a reduced forward-link transmission power value; and notification means for notifying said mobile station of the system parameter information of said mobile station, which is output from said calculated means, and said mobile station comprising: transmission power control means for, when said mobile station in a standby state starts originating/terminating operation to/from said base station, controlling a transmission power value of the reverse-link control channel from said mobile station on the basis of a value obtained from a reception field strength value of the forward-link control channel from said base station and the system parameter information of said mobile station, which is transmitted from said base station.