Patent ID: 6799030
Filing Date: 2004-09-28
Classification: H04W,Y02D

Abstract:
A method for causing a radio frequency (â€œRFâ€ ) modem to operate in a low power state when said modem is unable to register itself with a base station controller within said modem's coverage area, said modem comprising a central processing unit and a first and second timer, said method comprising the steps of:(a) setting a time duration for said first timer, wherein the time duration of said first timer is the maximum amount of time that said modem will attempt to register with a base station controller before entering into a low power state; (b) setting a time duration for said second timer, wherein the time duration of said second timer is the amount of time that said modem will operate in said low power state; (c) detecting that a connection to a base station controller is lost, and causing said first timer to start; (d) attempting to register said modem with base station controller; (e) causing said modem to operate in a normal modem active state if said modem registers with said base station controller before said first timer times out, and causing said second timer to start if said modem has failed to register with said base station controller at the point when said first timer times out; (f) causing said modem to operate in said low power state during the duration of said second timer; and (g) causing said modem to awaken from said low power state when said second timer times out and to return to step (c).