Access to IP multimedia subsystem of UMTS via PacketCable network

Creating a background to give access to the IP multimedia subsystem (IMS) of the UMTS domain over different kinds of access networks (like WLAN, PacketCable and DSL), which we name multi-access to IMS, can provide many benefits according to the capabilities of IMS in offering different types of IP-based multimedia services. As a part of multi-access idea, we have worked on the access to IMS via PacketCable. The PacketCable architecture seeks to enable a wide variety of IP-based multimedia services over two-way hybrid fiber-coax (HFC) cable access systems. We have proposed some solutions for the different phases of this interconnection between the PacketCable network and IMS of UMTS: from attaching to the UMTS core network (UMTS-CN) and making a secure connection, until accessing the services and session establishment. We suggest some modification and development in PacketCable entities to allow them to be capable of establishing such an inter-connection.