Patent ID: 7340270
Filing Date: 2008-03-04
Classification: H04W

Abstract:
1. A method for RF output power control, comprising steps of: switching a wireless communication device to a normal power mode so as to output a normal RF output power; receiving a beacon; and switching said wireless communication device to a reduced power mode so as to output a reduced RF output power, wherein said reduced RF output power is no more than said normal RF output power; wherein said wireless communication device is switched between said normal power mode and said reduced power mode according to a state parameter corresponding to said received beacon, wherein said reduced power mode comprises a scanning power mode and an efficiency-enhanced mode, said reduced RF output power comprises a corresponding scanning output power and a corresponding controlled output power, said scanning output power being between a maximum output power and a minimum output power of said wireless communication device, said controlled output power is determined according to a fact whether said wireless communication device has resent a frame, wherein one pre-determined unit is added to said controlled output power when said wireless communication device resends said frame, wherein said controlled output power is adjusted according to a re-send-to-send ratio when said wireless communication device does not resend said frame, wherein said resend-to-send ratio is determined according to a number of times said wireless communication device resends said frame and a number of times said wireless communication device sends said frame.