Classification Based On SIP Telephone Conference System Architecture And Protocol Research And Implementation

Meeting in the human political, economic, cultural and military activity plays an important role, with the development of the society, meeting become an increasingly important mode of communication between people, and conference call with its advantages of economic, convenient and efficient has been widely used.In actual use process, the members of the conference call tend to have local concentration of wide-area distributed characteristic, this article will this network centralized distributed network for short. Commonly used end users blend mode and concentrated blend mode has its own disadvantages: end users blend mode to the terminal ability the demand is higher, voice and data redundancy in the network, the bandwidth efficiency is low, easy to cause local network congestion, bandwidth efficiency is not high. The two model can net adapt to centralized distributed network characteristics. In addition, the current is also more and more to the attendance requirement, end users blend mode and centralized mixed mode is limited by the performance of mixer gradually cannot meet the requirements.In this paper research the concentration characteristics of distributed network, SIP protocol, H.248/megaco protocol and hybrid model, on the basis of design and implements a hierarchical hybrid on sip. In this paper, the main research contents and work mainly includes the following several aspects:1) The SIP protocol standard, through to the SIP protocol extensions, realize the grading conference calls to create, manage and closing functions of signaling control;2) Research for H.248/megaco protocol in the media control mechanism in the conference call system, realized the media conference call system and signal separation, separation of the business and the media, make the system has strong flexibility and expansibility;3) Study the existing telephone conference hybrid mode, put forward and realized for conference hybrid model, put forward and realized for conference call system hierarchical load, to avoid repeating the media data transmission, improve the bandwidth efficiency;4) Conference call system for the main function, performance testing, the results of the completion of this project were evaluated, verify the validity and superiority of the system.