Patent ID: 6975872
Filing Date: 2005-12-13
Classification: H04W

Abstract:
1. A method of locating a mobile station when the mobile station is turned off, the method comprising: turning off the mobile station while keeping a battery of the mobile station intact in the mobile station; the mobile station entering a soft power-off mode after the mobile station has been turned off if the battery of the mobile station has sufficient energy; at least one base station of a mobile phone network sending paging request messages for locating the mobile station; the mobile station receiving the paging request messages from at least one base station; the mobile station measuring Received Signal Strength Indicator (RSSI) levels for received paging request messages and the mobile station selecting a current base station for which the mobile station measures a strongest RSSI level; handshaking between the mobile station and the current base station to enable the mobile station to camp on the current base station; the mobile station reporting its location to the current base station; and the mobile phone network informing authorities of the location of the mobile station.