The Research Of A Kind Of Communication System Framework And Algorithms Based On P2P-SIP Technology

In the absence of centralized server management, a scalable, and network robustness and good strong advantages of P2P systems applied to the conversation that P2P-SIP technology is a hot view industry. SIP protocol with its simple, easy to expand, and many other strengths of the more favored by the industry, is gradually becoming important agreement in NGN (Next Generation Network) and 3G Multimedia Subsystem domain. Considering using SIP in P2P networks to provide high-quality multimedia communications services, high research value and practical significance, the target of this study is based on P2P-SIP communication system framework and implementation of distributed node routing algorithm.With a start from a technique point of view, paper designs of a network communications systems based on a completely distributed P2P-SIP, this research goes deep into P2P-SIP system routing algorithm, and the algorithm through the simulation verifies of the conclusions of achieving P2P-SIP system optimization. Paper also has technical to support P2P-SIP basic node positioning and the establishment of the session, also provides senior services sending information offline. And Paper gives the corresponding solution to through the NAT and firewall security of P2P-SIP.Paper includes the writer's main work in aspects below:1. Introduce P2P technology and a detailed analysis of SIP protocol, and give a completely Distributed P2P technology, as well as the application of SIP communications and security in the high scalability; 2. Improve P2P-SIP View system of algorithms—Chord algorithm, and introduce Super nodes, Ordinary nodes and the concept of Mobile agents in improving the Chord algorithm, network simulation results show that the better search makes robustness of the algorithm more efficient;3. Design a communications systems based on P2P-SIP technology, and can support conversation function, basic node positioning, as well as multi-media session to establish peer-to-peer transmission, and to provide senior services sending information offline;4. In the actual deployment of P2P-SIP communication system in the process, encountered some of the practical operational issues, such as through the firewall and NAT, P2P-SIP Communication System security issues, give the corresponding solution;5. Summarize processes and development prospects of the practical application of P2P-SIP technology fixed in the Internet and mobile network.