METHOD AND DEVICE FOR CONSERVING POWER IN A CDMA M

专利名称：METHOD AND DEVICE FOR CONSERVING

POWER IN A CDMA MOBILE TELEPHONE

发明人：CHEN, David,NGUYEN, Tien, Q.申请号：EP00959408.6申请日：20000825公开号：EP1138123A1公开日：20011004

摘要：Disclosed is a method and a system for conserving power. The method andsystem maintains continuous CDMA system time using a 32 kHz clock source. Specifically,one embodiment of the present invention includes a method for conserving powerduring a low power mode of a communication device while dynamically maintaining aCode Division Multiple Access (CDMA) system time. The method includes the step ofcausing a mobile station to enter a low power mode and utilizing a low power consuminginaccurate clock source (e.g., 32 kHz) to dynamically maintain a CDMA system time whilelimiting power input to a high power consuming accurate clock source, e.g., a VoltageControl Temperature Control Crystal Oscillator (VCTCXO). Furthermore, the methodincludes the step of utilizing an adjustment function to update a polynomial function (e.g.,long PN) at a fixed increment which is part of the CDMA system time in order to minimizepilot signal acquisition time when the mobile station wakes up from the low power mode.

申请人：Koninklijke Philips Electronics N.V.

地址：Groenewoudseweg 1 5621 BA Eindhoven NL

国籍：NL

代理机构：Volmer, Georg

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