Patent ID: 8112650
Filing Date: 2012-02-07
Classification: H04W,Y02D

Abstract:
1. A method for re-acquisition of a wireless communications network by a mobile station in a power saving mode, comprising: during a low power interval from a plurality of low power intervals of the power saving mode during which at least some receiving circuitry is powered down, temporarily powering up the receiving circuitry to locate a channel wherein the plurality of low power intervals includes at least a first low power interval with a first length and a second low power interval with a second length longer than the first length; powering down the receiving circuitry for a remainder of the low power interval after the channel is located; and at an end of the low power interval, powering up the receiving circuitry for one or more listening intervals of the power saving mode to listen for a signal prompting an exit from the power saving mode, wherein the one or more listening intervals interleave the plurality of low power intervals.