Patent ID: 6661782
Filing Date: 2003-12-09
Classification: H04W

Abstract:
A method for updating a routing area in a packet radio network, the method comprisingestablishing a logical link between a mobile station and a first radio support node via a radio cell, selecting a second radio cell in the mobile station, the routing area identifier broadcast by the cell being different from the routing area identifier of the first radio cell, sending a routing area update request to the second packet radio support node serving the second cell from the mobile station, detecting in the second packet radio support node that the mobile station has roamed from a routing area served by a different packet radio support node, requesting subscriber data related to the mobile station from the first packet radio support node, sending an acknowledgement message on the routing area update from the second packet radio support node to the mobile station, sending information on the change of the packet radio support node from the second packet radio support node to the mobile station, and initiating a local procedure or a network procedure for initializing a logical link between the mobile station and the second packet radio support node in the mobile station in response to the reception of said information.