Service execution across legacy and internet protocol multimedia subsystem domains

摘要

Systems and methods for service execution across legacy telecommunications networks and Internet Protocol Multimedia Subsystem (IMS) domains are described. In one aspect, a convergence gateway is deployed in an IMS network to interface between the IMS network and a legacy circuit-switched (CS) telephony network (legacy network). The convergence server extends legacy network-supported circuit-switched services (including voice supplementary services, enhanced voice services, and messaging) to IMS core network subscribers. To this end, the systems and methods rely on the legacy network to implement supported circuit-switched services and generate corresponding results. The corresponding results are adapted to a signaling protocol and state model for the IMS network and provided to one or more IMS subscribers.

主权项

1. A method for service execution in/across legacy and Internet Protocol Multimedia Subsystem (IMS) domains, the method comprising:
utilizing a convergence gateway in an IMS network to interface between the IMS network and a legacy circuit-switched (CS) telephony network; and extending legacy network-supported circuit-switched services to IMS subscribers through the convergence gateway, the extending comprising:
relying on the legacy network to implement supported circuit-switched services and generate corresponding results;adapting the corresponding results of the supported circuit-switched services to a signaling protocol and state model for the IMS network;providing the adapted results to one or more IMS subscribers;performing as an application server (AS) to a Serving Call Session Control Function (S-CSCF) in the IMS network; andfunctioning, if the legacy network is a second generation (2G) network or a twopointfive generation (2.5G) network, as a Base Station Controller (BSC) to a legacy network Media Gateway Control Function (MGCF) portion of a Mobile Switching Center (MSC) server, wherein the legacy network-supported circuit-switched services comprise one or more Intelligent Network services, messaging service, voicemail and directory service.