Patent ID: 6334062
Filing Date: 2001-12-25
Classification: H04W

Abstract:
A wireless subscriber station arranged for communication with an analog cellular voice communication system and a Cellular Digital Packet Data (CDPD) communication system, wherein said CDPD communication system includes first time adjustment means for selecting a first time interval between consecutive CDPD paging messages sent from said CDPD communication system to said wireless subscriber station, said wireless subscriber station comprising:(a) means for controlling analog cellular voice communication;(b) means for controlling CDPD communication;(c) second time adjustment means for selecting a second time interval starting at a most recent CDPD communication and ending when said wireless subscriber station is configured to enter a CDPD sleep mode;(d) means for synchronizing said first and second time intervals to determine respective CDPD and analog cellular operation schedules;(e) means for selecting operation of one, the other or both said means for controlling communication based upon said operating schedules and(f) means for requesting a value for a parameter N204 wherein product of a parameter and the first time interval define a time duration allowed before de-registration of said wireless subscriber station,wherein said analog cellular voice communication system is constituted by an Advanced Mobile Phone Services (AMPS).