Patent ID: 7324556

Claim:
A method for re-establishing a connection between a Mobile Station and a Serving General Packet Radio Service (GPRS) Support Node after a partial restart of the Serving GPRS Support Node in which only a Gb interface between the Serving GPRS Support Node and a Base Station System is restarted, comprising the steps of: responding to a failure of a central processing unit in the GPRS Support Node: informing a GPRS Mobility Management & Session Management layer in the Serving GPRS Support Node about the restart of the local Gb interface; identifying affected Mobile Station contexts; setting the GPRS Mobility Management & Session Management, Logical Link Control and Subnetwork Dependent Convergence Protocol layers in the Serving GPRS Support Node in a special Gb restart state; sending a Logical Link Control frame to the Serving GPRS Support Node; and re-establishing the appropriate Logical Link Control and Subnetwork Dependent Convergence Protocol layers on reception of the Logical Link Control frame.