P2P-IMS系统的用户接入技术的研究

With the rapid development of Internet telephony, mobile communications and Internet technologies, user demand for multimedia communications and intelligence services, have made operators more and more passive. Simple traditional voice services and Internet access services have been unable to bring massive economic benefits for telecom operators, their real breakthrough is to find a way to provide more innovative, more diversified multimedia services and integration with current business.?P2P-IMS system combines the features of the new distributed Internet technology and traditional telecommunications networks, the use of P2P technology with advantages of low cost, high reliability and high scalability, brings new opportunities for development for traditional VOIP business. This paper presents a kind of technology for a user access to P2P-IMS system technology, SIP proxy is responsible for user agent accessing P2P network, supporting audio and video calls between multiple types of terminals, instant messaging?and solve?network messages efficiently routing and data efficiently acquisition and storage, NAT traversal, and other problems which can not be solved in tradistional IMS nework. Compared with the traditional solution, it will reduce maintenance and soft development costs and improve availability and scalability of the entire system.