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Abstract

The IP Multimedia subsystem (IMS) based on SIP as mechanism signalling and interfaces with other servers using OSA (Open Service Access) and CAMEL (Customized Applications for Mobile network Enhanced Logic).Is responsible for the interconnection of IP packets with other network, IMS support data communication services, voice, video, messaging and web-based technologies. In this work we present a distributed design of architecture that turns up some challenges of transparent mobility on the secured IMS architecture. We introduced the architecture with clustering database HSS and automatic storage of data files that give a secure access to database. This paper gives an overview of classification of security in IMS network and we show delay analysis comparison in signalling interworking with and without securing Gateway (SEG) in the registration of any UE in access network based IMS. We show that there is a tradeoff between the level of increasing system security and the potential delay incurred by mobility in Access Network .we conclude that this architecture is suitable for operators and services providers for the new business models delivering ,the services based IMS Everywhere, anytime and with any terminals.