Patent ID: 6847818

Claim:
A method for controlling transmission power of a downlinking signal from a base station to a mobile station depending on a base station selection signal, wherein the mobile station selects at least one primary base station among a plurality of base stations which are connected to the mobile station for soft handover to produce the base station selection signal designating said at least one primary base station, comprising the steps of: at each of the base stations, receiving the base station selection signal from the mobile station; measuring an amount of loss of the base station selection signal; determining whether the amount of loss of the base station selection signal exceeds of threshold; when the amount of loss of the base station selection signal does not exceed the threshold, setting the transmission power of the downlink signal to a selected one of a normally controlled level and a minimum level depending on the base station selection signal; and when the amount of loss of the base station selection signal exceeds the threshold, setting the transmission power of the downlink signal to the normally controlled level.