Patent ID: 8032106
Filing Date: 2011-10-04
Classification: H04W,Y02D

Abstract:
1. A method for switching at least a component or a function of a wireless communication device operating in a first operating mode, to a second operating mode, said device comprising at least a first clock (LPC), a counter (CNT) clocked by the first clock and counting the number of pulses of the first clock, and a second clock (HFC) delivering a date synchronized with a reference date of a third clock external to the device, said method comprising at least the steps of: step A: at a first occurrence of a first pulse edge of the first clock, storing a corresponding first pulses number of the first clock and a corresponding first date delivered by the second clock and synchronized with a first reference date of the third clock; step B: at a second occurrence of a second pulse edge of the first clock, storing a corresponding second pulses number of the first clock and a corresponding second date delivered by the second clock and synchronized with a second reference date of the third clock; step C: computing a frequency error of the first clock by using at least the frequency of the first clock, the first and second pulses numbers, and the first and second dates, or the first and second reference dates; step D: according to at least the frequency error, computing a third pulses number of the first clock corresponding to a third date at which the component or function will be switched from the first operating mode to the second operating mode; and step E: switching the component or the function to the second operating mode at the occurrence of the third pulses number.