The Research And Application Of SIP Protocol Stack

Network has become an important tool for our life.The communication networkand the Ethernet have been the largest ones. With the development of networktechnology, some private and independent networks have been well developed insome areas. Therefore, it becomes a hot research how to effectively integrate differentnetworks to create a more innovative service. SIP protocol with a good design andgreat technological advantages, has become one of the most important protocol in thenext generation network. The dissertation studies detailedly on the principle of SIPprotocol, SIP stack and the application of SIP protocol. The main works of thedissertation are as follows:(1) On the basis of analyzing the grammar and principle of SIP, the dissertationstudies detailedly on the structure of SIP network and its behavior and process. Then,IMS network which uses the SIP protocol as its control signaling is detailedlyresearched, including its network structure and principle. Based on those theories, anIMS network test bed named OpenIMSCore is build up in a virtual computer, and alaboratory-grade IMS network test environment has been realized.(2) After studying the principle of SIP stack, the dissertation analyzes the needs ofSIP protocol stack while accessing mutiple networks. Based on the OSIP protocolstack, many key functional modules such as media negotiation, message management,parameter management, memory allocation management are designed and completed.Finally, a new stack which can support multiple accounts and access diffident SIPnetwork is designed.(3) Some problems of the traditional building intercom system are analyzed. Withthe advantages of SIP protocol, a new solution of building intercom system based onSIP protocol is designed. The Solution bases on IP technology, uses C/S architectureand takes SIP as its session signaling. The dissertation finishes the implement of thissolution, building up a server and a door satation simulator, especially focuses on theimplement of the hardware and software of the indoor unit. In the dissertation, a test environment is built up to analyze and test thedissertation’s works. The test result verifies the SIP stack implemented has achievedthe desired purpose, and the solution of building intercom system based on SIPprotocol has high feasibility too. Both the two will have a great significance for SIPapplication.