Patent ID: 6119018
Filing Date: 2000-09-12
Classification: H04W

Abstract:
In a mobile communication system comprising a plurality of radio base stations covering respective service areas, at least one mobile station moving in the service areas to carry out radio communication between the mobile station and the radio base stations, and a host station connected to said radio base stations,each of said radio base stations comprising:a receiver for receiving an upward communication channel signal from said mobile station;a processor for calculating, on the basis of the upward communication channel signal, a transmission power control signal for controlling transmission power for said mobile station; anda transmitter for transmitting the transmission power control signal to said host station,said host station comprising:a receiver for receiving the transmission power control signals from said radio base stations as received transmission power control signals;a selection device for selecting, as a selected transmission power control signal, one of the received transmission power control signals that provides the lowest transmission power for said mobile station of any of the received transmission power control signals; anda transmitter for transmitting the selected transmission power control signal to a particular one of the radio base stations that communicates with said mobile station,each of said radio base stations further comprising:a receiver for receiving the selected transmission power control signal from said host station; anda transmitter for transmitting the selected transmission power control signal to said mobile station,said mobile station comprising:a receiver for receiving the selected transmission power control signal from the radio base station communicating with said mobile station; anda controller for controlling the transmission power on the basis of the selected transmission power control signal.