Patent ID: 6628924
Filing Date: 2003-09-30
Classification: H04W

Abstract:
A method for controlling a first reference SIR (Signal-to-Interference power Ratio) which is used as a reference of a closed loop control by a first radio station to control transmission power of a second ratio station connected to the first radio station by radio in a mobile communication system, comprising the steps of:a) determining whether a first radio channel used to communicate with the second radio station has sufficient communication quality; b) when the first radio channel has insufficient communication quality, increasing the first reference SIR by a predetermined increase amount; c) when the first radio channel has sufficient communication quality, determining whether the first radio station is involved in the closed loop control controlling transmission power of the second radio station; d) when the first radio station is involved in the closed loop control, decreasing the first reference SIR by a predetermined first decrease amount; and e) when the first radio station is not involved in the closed loop control, decreasing the first reference SIR by a predetermined second decrease amount which is greater than the predetermined first decrease amount.