Nokia Corporation

Nokia Solutions and Networks Oy

Nokia Technologies Oy

György Wolfner

Stefano M Faccin

Franck Le

Philippe Godin

Jozsef Varga

Gábor Bajko

In accordance with an example embodiment of the present invention a source node decides to attempt to handover a user equipment to a target cell based at least in part on a comparison of a closed access group information of the user equipment and a stored closed access group information of a target cell associated with the target node. The source sends to the target node a handover message comprising an identifier of the target cell, receives from the target node a handover failure message comprising second closed access group information of the target cell which the source node uses to update the stored closed access group information of the target cell.

Methods and apparatae for mobility in private networks

A method in a communication system wherein a user () is arranged to register with a control entity () comprises sending a message from the communication system to the user () requesting that the user re-register with said communication network. The user is caused to re-register with said network in response to said message.

Subscriber registrations in a mobile communication system

A technique for authenticating a user to a server using SIP messages includes forwarding an SIP request from the user agent to the server. The server then forwards a request for authentication to the user agent in response to the invite request, the request for authentication including information that the authentication will be performed using a UMTS AKA mechanism. The user agent then forwards and authentication response to the server in accordance with the UMTS AKA mechanism and the server then performs the appropriate actions to perform an invoked SIP procedure in response to the SIP request. The SIP request may include any standardized SIP request including an SIP INVITE request or an SIP REGISTER request.

Techniques for performing UMTS (Universal Mobile Telecommunications System) authentication using SIP (Session Initiation Protocol) messages

Techniques for performing UMTS (universal mobile telecommunications system) authentication using SIP (session initiation protocol) messages

Growing community of inventors

Budapest, Hungary

György Wolfner