NETWORKED WIRELESS COMMUNICATIONS DEVICE PROGRAMMED TO IDENTIFY AND ELIMINATE PROBABLE MULTIPATH ERRORS SO AS TO ENHANCE ACCURACY IN CORRECTING SLEEP CLOCK FOR THERMALLY INDUCED ERRORS

摘要

PPROBLEM TO BE SOLVED: To correct a sleep clock operating in a wireless environment. PSOLUTION: A time reference output by a wireless communication network is investigated and compared with output of a sleep clock and a current error in a sleep clock frequency is computed. If the current error does not exceed a predetermined threshold, the current error is utilized as a corrected error. If the current error exceeds the predetermined threshold, the restricted current error is utilized as a corrected error. Input including the corrected error is utilized to estimate the frequency of the sleep clock. When the next wake-up time is scheduled, the estimate in the frequency of the sleep clock is utilized. PCOPYRIGHT: (C)2010,JPO&INPIT