Patent ID: 7277721

Claim:
A transmission power control device that controls transmission power of a mobile station based on transmission power control information supplied from a plurality of base stations to the mobile station when the base stations to be radio-connected to the mobile station each supply the mobile station with the transmission power control information that is generated based on reception signal quality in a mobile communication system, the transmission power control device comprising: a transmission loss calculator that calculates a transmission loss in an electric wave transmission path between the mobile station and each base station, based on a predetermined signal transmitted from each base station with a fixed transmission power level; and a transmission power control information determiner that determines which pieces of transmission power control information are to be used in a transmission power control operation at the mobile station, based on the plural pieces of transmission power control information that are supplied from the plural base stations to the mobile station and each of the transmission losses in the electric wave transmission path between the mobile station and each of the base stations that is calculated by the transmission loss calculator, wherein each of the transmission losses is considered as a reliability of each of the corresponding transmission power control information.