Patent ID: 6873855
Filing Date: 2005-03-29
Classification: H04W

Abstract:
1. A radio telephone system including a base station connected to a wire circuit and a plurality of mobile stations, located in a radio zone of the base station, which perform radio communications with the base station, respectively, said radio telephone system comprising: a first interface provided in each of said mobile stations for performing communication with said base station; a second interface provided in said base station, said second interface adapted to change its transmission power for performing radio communications with said mobile stations, respectively; and a control section provided in said base station for controlling the transmission power of said second interface by determining positions of the mobile stations within said radio zone based on echo-back response signals received from said mobile stations, so that said second interface performs the radio communications with all the mobile stations located in said radio zone at a controlled minimum transmission power that is common to all of the mobile stations located in said radio zone.