Patent ID: 7702371
Filing Date: 2010-04-20
Classification: H04W,Y02D

Abstract:
1. A communication device comprising: a radio module operable to operate in a high-power mode and a reduced-power mode; a clock generator for generating first and second clock signals for use by said radio module, said first clock signal corresponding to said high-power mode and said second clock signal corresponding to said reduced-power mode; a timer operable to count clock cycles of said first and second clock signals; power management logic operable to calibrate the frequency of said clock generator while said communication system is operating in said reduced power mode; and a timer management module operable to count the number of clock cycles for said first clock when said communication system is operating in said high power mode and further operable to count the number clock cycles for said second clock signal when said communication system is operating in said reduced-power mode; wherein the number of clock cycles counted by said timer when said communication system is operating in said reduced-power mode is converted to an equivalent number of clock cycles that would have been generated by said first clock by using an adjustment factor based on the number of cycles said first clock would generate during a single cycle of said second clock.