Patent ID: 7907915
Filing Date: 2011-03-15
Classification: H04W

Abstract:
1. A broadband wireless communication system supporting an open loop power control and a closed loop power control, the system comprising: a Subscriber Station (SS) for transmitting a power control change request message to a Base Station (BS) to change a power control scheme; and the BS for deciding to change the power control scheme between the open loop power control and the closed loop power control, and for transmitting, to the SS, a power control change response message including a decided power control scheme, wherein the power control change response message includes a power control mode change field indicating the decided power control scheme, a start frame field indicating a frame number at which the indicated power control scheme is activated, a power adjust field indicating a change in power level that the SS should apply to its current transmission power, if the indicated power control scheme is the closed-loop power control, and an offset field indicating a change in power level that the SS should apply to an open loop power control formula, if the indicated power control scheme is the open-loop power control.