Patent ID: 7570976
Filing Date: 2009-08-04
Classification: H04W,Y02D

Abstract:
1. In a wireless communication network, a method of expeditiously releasing network resources for a mobile station comprising the acts of: receiving, from a mobile station, a message indicative of a low battery condition of the mobile station; running a timer; identifying that a lost signal condition exists between the mobile station and the wireless communication network upon failure to receive a transmission signal or a renewal or cancellation of the message indicative of the low battery condition from the mobile station within a predetermined time period defined by the timer; in the absence of receipt of a power down registration message communicated from the mobile station as part of a power down procedure when the mobile station is powered down, performing a power down registration procedure for the mobile station in response to receiving the message indicative of the low battery condition and identifying the lost signal condition, thereby to cause one or more network resources for the mobile station to be released.