Patent ID: 8301163
Filing Date: 2012-10-30
Classification: H04W

Abstract:
1. A method for locating a terminal device in a network system, at least one network having several cells that are combined to form one or more tracking areas, the one or more tracking areas being combined to form an equivalent area, the method comprising: transmitting a locating message from the terminal device to the at least one network when the terminal device enters the equivalent area; transmitting locating messages from the terminal device to the at least one network at predetermined time intervals; indicating via the locating messages a sub-area of the equivalent area in which the terminal device is located during the transmission of a locating message; storing at least the sub-area indicated in a most recently received locating message by the network; and transmitting at least a first terminal device tracking call by the network within the stored sub-area in order to locate the terminal device.