Importance

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Abstract

Forward power control for a mobile communication system is provided on a frame by frame basis during a soft handoff of a mobile station from a source base station to a target base station. Each base station runs independent but identical algorithms. A selector runs the same power control algorithm as each base station and coordinates power control between the two base stations and the mobile station during the soft hand-off. The results of the algorithm run by the selector are delayed because of back haul. The selector provides the base stations with traffic gain and frame delay information corresponding to the traffic gain. The base station ASIC, modifies the base station power output according to the SNR data received from the mobile station and the traffic gain and frame delay information received from the selector. Providing the frame delay information permits forward power control even when there is delay from when the selector computes the traffic gain and the traffic gain is programmed into the base station application specific integrated circuit.

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First Claim