Invention Grant
US08195251B2 Reducing WLAN power consumption on a mobile device utilizing a cellular radio interface 有权
使用蜂窝无线电接口降低移动设备上的WLAN功耗

Reducing WLAN power consumption on a mobile device utilizing a cellular radio interface
Abstract:
A system and method of reducing the WLAN power consumption and limiting battery drain of a mobile communications device is provided. The mechanism continuously monitors for changes in the WLAN and cellular signal strength and modifies the WLAN profile scanning activity accordingly. By monitoring for changes, transitions can be detected which indicate the location of the mobile device (i.e., indoor or outdoor). An increase in cellular signal strength and a decrease in WLAN signal strength indicates the user is transitioning outdoors where WLAN coverage may be limited. To reduce battery power consumption, background scanning is suspended or its frequency significantly lowered. Moving indoors is indicated by a decrease in cellular signal strength and an increase in WLAN signal strength. Background/Connectivity scanning frequency is increased to provide shorter time-to-connect to WLAN Networks for the user within the WLAN coverage area.
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