Abstract:
PROBLEM TO BE SOLVED: To correct a sleep clock operating in a wireless environment. SOLUTION: 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. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
A method for correcting operation of the sleep oscillator ( 116 ) of a wireless communications device ( 100 ). Sleep oscillator frequency is estimated ( 412 ) so as to compensate for estimated temperature induced errors. In estimating temperature induced errors, errors ( 504 ) in sleep oscillator frequency are treated as being temperature induced errors ( 522 ), but probable multipath errors are bounded ( 410, 520 ) to predetermined sleep clock error maxima ( 602 ) corresponding to sleep duration over which the error occurred.
Abstract:
A method for correcting operation of the sleep oscillator ( 116 ) of a wireless communications device ( 100 ). Sleep oscillator frequency is estimated ( 412 ) so as to compensate for estimated temperature induced errors. In estimating temperature induced errors, errors ( 504 ) in sleep oscillator frequency are treated as being temperature induced errors ( 522 ), but probable multipath errors are bounded ( 410, 520 ) to predetermined sleep clock error maxima ( 602 ) corresponding to sleep duration over which the error occurred.
Abstract:
A method for correcting operation of the sleep oscillator ( 116 ) of a wireless communications device ( 100 ). Sleep oscillator frequency is estimated ( 412 ) so as to compensate for estimated temperature induced errors. In estimating temperature induced errors, errors ( 504 ) in sleep oscillator frequency are treated as being temperature induced errors ( 522 ), but probable multipath errors are bounded ( 410, 520 ) to predetermined sleep clock error maxima ( 602 ) corresponding to sleep duration over which the error occurred.
Abstract:
Un metodo para corregir la operacion del oscilador en actividad (116) de un dispositivo de comunicaciones inalambricas (100). La frecuencia del oscilador de inactividad es estimada (412) para compensar por errores inducidos por temperatura estimados. En la estimacion de los errores inducidos por temperatura, los errores (504) en la frecuencia del oscilador de inactividad son tratados como si fueran errores inducidos por temperatura (522), pero los errores de multitrayectoria probables son limitados (410, 520) a un maximo de errores de reloj de inactividad predeterminado (602) correspondiente a la duracion de la inactividad durante la cual ocurrio el error.
Abstract:
A method for correcting operation of the sleep oscillator (116) of a wireles s communications device (100). Sleep oscillator frequency is estimated (412) s o as to compensate for estimated temperature induced errors. In estimating temperature induced errors, errors (504) in sleep oscillator frequency are treated as being temperature induced errors (522), but probable multipath errors are bounded (410, 520) to predetermined sleep clock error maxima (602 ) corresponding to sleep duration over which the error occurred.