Design of distributed IMS by classification and evaluation of costs for secured architecture

The core of Next Generation Network(NGN) IP Multimedia subsystem(IMS) based on SIP as mechanism signaling, is an important challenge for supporting data communication services, voice, video, messaging and web-based technologies. In this work we present a novel design of architecture and turns up some challenges of new IMS architecture and security system. This architecture provides a robustness, reliability, scalability and strategy for extension in the future and responds to the security challenges. We introduced the architecture with clustering database HSS and automatic storage of data that give a secure database. This paper give a classification of security in IMS network, modulate the risk in IMS network and our comparison is giving by cost signaling interworking with and without securing Gateway (SEG). We show that there is a tradeoff between the level of increasing system security and the potential cost incurred. we conclude that this architecture is suitable for operators and services providers for the new business models.