Patent ID: 8532091
Filing Date: 2013-09-10
Classification: H04L,H04M,H04W

Abstract:
1. An Access Gateway Node for providing access to a packet-based multimedia system for a user with a circuit switched controlled user's terminal having a circuit-switched controlled access for communicating with a circuit switched controlled domain and being served by the circuit-switched controlled domain, wherein the user's terminal is not performing a registration in the packet-based multimedia system, wherein said Access Gateway Node includes a processor coupled to a memory for storing computer program instructions, wherein when the processor executes the computer program instructions, the Access Gateway Node is caused to perform the following: receive a trigger message related to the circuit-switched controlled user's terminal from the circuit-switched controlled domain over the circuit-switched controlled access including a circuit-switched related parameter; provide packet-based multimedia system parameters, wherein at least one packet-based multimedia system parameter is derived from the circuit-switched related parameter; and provide an access to the packet-based multimedia system based on the at least one packet-based multimedia system parameter by means of a user agent therein handling the registration on behalf of the user in the packet-based multimedia system and by means of a proxy call session control function therein being a contact point for communicating with the packet-based multimedia system, wherein the at least one packet-based multimedia system parameter is used by the user agent to register the circuit-switched controlled user's terminal in the packet-based multimedia system.