Research And Implementation, Based On The Cdn And P2p, Streaming Media Distribution System

The rapid development of information and communication technology promotes the development of network video service, even if the current video service have problems in expansibility, robustness, Qos etc. The traditional client / server model can not adapt to the mass media stream distribution because of the server performance bottleneck , and IP multicast technology is difficult to get ahead because of the complexity of the agreement and dependency on function of multicast router, and content distribution network technology faces high cost and scalability problems, and P2P technology is low cost and good scalability , but it is hard to manage and haves problem on piracy, information security, reliability, network bandwidth which makes the P2P technology cannot use on large-scale commercial applications.In this thesis the streaming distribution system combines CDN and P2P technology and builds two levels P2P streaming data distribution system base on CDN network. Using this model it can greatly improve the capacity of the network with no additional costs, which keeps the stability of CDN and fully utilizes the P2P expansibility. The paper analyses the research status of the streaming media distribution technology at home and abroad, and introduces the key technology about streaming media,p2p and CDN in streaming media system, and investigates some popular P2P streaming system models, and does a comprehensive comparison to obtain the advantages and disadvantages of these models. These models are important to design streaming media distribution system based on CDN and P2P technology. The thesis has designed the core model and all the other functional model of a streaming media distribution system named CDNPP, and developed the core model of it.The development environment is Visual Studio 6.0 as development tool, c + + as the development and the WinXP as operating system. The recurrence time of streaming data and the data collected from the service quality monitoring indicates that the distribution system achieved the desired effect when it is tested in the local area network .