Access to IP multimedia subsystem of UMTS via PacketCable network

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