Nokia Siemens Networks Oy

Serafim Petsis

Vesa Pauli Hellgren

A method of locating NAS context relating to a network access server session in a communication network is provided, the method comprising receiving an Accounting Stop Request for a PDP context associated to a network access server session, comparing an Accounting Session ID implemented in the Accounting Stop Request with Accounting Session IDs associated with active network access server sessions, in case that no matching Accounting Session ID is found, determining whether a value of an identification parameter implemented in the received Accounting Stop Request matches a value of a corresponding identification parameter associated with an active network access server session, and locating a NAS context based on the result of matching identification parameters.

Method of locating NAS context

A method of deciding to release communication resources used for a network access server session in a communication network is provided, wherein the method involves receiving an Accounting Stop Request for a PDP context associated to the network access server session, deciding whether a Session Stop Indicator is included in the Accounting Stop Request, in case no Session Stop Indicator is included deciding whether further PDP contexts are associated with the network access server session, in case no further PDP context is associated with the network access server session, starting an IDLE Timer to determine a point in time for releasing the communication resources.

Growing community of inventors

Attikis, Greece

Serafim Petsis