Patent ID: 7085559

Claim:
A mobile communication system having a plurality of base stations and a radio controller configured to control each of the base stations, wherein, each of the base stations comprises a transmission power notifying unit which notifies the radio controller of downlink transmission power to mobile stations; the radio controller comprises: a cell determination unit which determines one of a plurality of cells having good communications quality among the cells provided by each of the base stations; a reference power ratio decision unit which decides a reference power ratio based on the ratio of the downlink transmission power of the base station providing the determined cell to maximum downlink transmission power of the base station; a reference power ratio notifying unit which notifies each of the base stations of the decided reference power ratio; and each of the base stations further comprises a transmission power controller which controls the downlink transmission power so that the ratio of the base station downlink transmission power to its maximum transmission power to mobile stations approaches the reference power ratio.