Patent ID: 7215955
Filing Date: 2007-05-08
Classification: H04W

Abstract:
1. A method for restoring a subscriber context in a mobile communication network, the method comprising: storing restart information for a serving GPRS support node (SGSN) at a gateway GPRS support node (GGSN), the restart information indicating whether the SGSN has been restarted; receiving a packet data protocol (PDP) context message at the GGSN from the SGSN, the PDP context message including restart information indicating whether the SGSN has been restarted; creating a response to the PDP context message at the GGSN; transmitting the response to the SGSN from the GGSN; comparing the restart information of the PDP context message received with the stored restart information stored for the SGSN at the GGSN; and inactivating all subscriber contexts which are stored in the GGSN for use of the SGSN and have been updated before the latest restart of the SGSN when the restart information of the message received in the receiving step differs from the restart information stored for the SGSN.