Method and apparatus for providing ims services to circuit-switched controlled terminals
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsAndreas Witzel, Ralf Keller
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Abstract
The present invention proposes a solution for providing IMS services to users having circuit-switched controlled terminals being not adapted to provide IMS services to the users. In particular, it is proposed, in order to allow IMS to take the full call and service control, to place a user agent being responsible for the user ported to the IMS in a new node type called Mobile Access Gateway Control Function (MAGCF). This new node combines the logical functionality of a cellular switching center and the logical functionality of IMS. The invention discusses a concept of a static MAGCF being deployed in a network and being assigned for handling a user.
Claims13
An Access Gateway Node adapted to provide 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 said node comprises
- a circuit-switched function adapted to receive a trigger message related to the circuit-switched controlled user's terminal from the circuit-switched controlled domain over a circuit-switched controlled access including circuit-switched related parameter,
- a conversion logic adapted to provide packet-based multimedia parameters wherein at least one packet-based multimedia system parameter is derived from the circuit-switched related parameter and
- a packet-based multimedia logic adapted to provide an access to the packet-based multimedia system based on the packet-based multimedia system parameters by means of a user agent handling on behalf of the user in the packet-based multimedia system and by means of a proxy call control function being a contact point for communicating with the packet-based multimedia system.
A method for providing access to a packet-based multimedia system for 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 with the following steps to be performed by an Access Gateway Node
- a circuit-switched function being part of a Access Gateway Node receiving a trigger message related to the circuit-switched controlled user's terminal from the circuit-switched controlled domain over the a circuit-switched controlled access including circuit-switched related parameter, and
- the circuit-switched function providing the received circuit-switched related parameter to a conversion logic being part of the Access Gateway Node, and
- the conversion logic providing packet-based multimedia parameters wherein at least one packet-based multimedia system parameter is derived from the circuit-switched related parameter and
- a packet-based multimedia logic providing an access to the packet-based multimedia system based on the packet-based multimedia system parameters for the circuit-switched controlled terminal using a user agent handling on behalf of the user in the packet-based multimedia system and a proxy call control function being a contact point for communicating with the packet-based multimedia system.
Dependencies are inferred from the claim text.