Patent ID: 6512756
Filing Date: 2003-01-28
Classification: H04W

Abstract:
A method for updating a routing area in a packet radio network, the method comprising:establishing a logical link between a mobile station and a first packet radio support node via a first radio cell, the mobile station selecting a second radio cell on roaming, the routing area identifier broadcast by the second cell being different from the routing area identifier of the first radio cell, the mobile station sending a routing area update request to the second packet radio support node serving the second cell, 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 of the routing area update from the second packet radio support node to the mobile station, initiating a signaling procedure for initializing a logical link between the mobile station and the second packet radio support node in the second packet radio support node in response to detecting that the mobile station has roamed from a routing area served by a different packet radio support node.