Converged access of IMS and web services: A virtual client model

This article presents a virtual client-based converged access architecture for IMS and web services. A virtual client transfers most of the signaling and session maintenance loads to a remote server named surrogate, which implements the IMS client. We describe how we have implemented an IMS-web hybrid service, Movieon- Demand (MoD), by deploying a simple IMS client and web server in a surrogate, and using an open-source implementation of a full IMS environment, from client to application server.