Study Of The Cdn-p2p Mixed-mode Streaming Media Platform And Achieve

With the rapid development of Internet technology and the broad network service, VOD service, one of broad network services, is becoming the most important service of Internet. Many service providers like CTC, CNC all develop their own streaming VOD platform. At present most streaming platforms are based on CDN technology. The streaming system based on CDN architecture has very high operating cost and limited flexibility and scalability, which are big obstacle for the quick development of broad network service. As a new rising technology, P2P( Peer-to-Peer) technology can make good use of all the network resource and release the pressure on the streaming media server, it has been widely researched and used in streaming live broadcast system. But there is no further research on how to use the P2P technology in the traditional CDN streaming VOD platform.This paper gives an introduction of the current research of CDN and P2P technology, after that on the analysis basis of the current research, combining the advantage of CDN and P2P, the paper introduces a CDN-P2P hybrid streaming VOD platform model. The model keeps CDN architecture on the top layer which can ensure the stability and safety of data source and uses P2P to do the data distributing in the middle layer of CDN network architecture which can efficiently resolve the data distributing problem. The P2P technology can distribute the pressure of data distributing during all nodes in CDN network (including central nodes and edge nodes), so the remote nodes are not only the client of data distributing but also the server. This can increase the loading balance ability of the whole CDN network obviously. In addition, new joining of remote server will not put too much pressure on the source server and increase the scalability of this system. In order to release the remote servers pressure which given by the random users in bottom layer, this paper introduces a kind of P2P node collaboration distributing mechanism. On the basis of P2P, under the service of remote servers, we can make good use of all the resource provided by the streaming media users and ensure the real-time and stable data distributing of streaming media.On the basis of CDN-P2P hybrid streaming VOD platform model, I design and implement a CDN-P2P hybrid streaming VOD platform prototype system and do the comparison and analysis under a simulation test environment. At last, this paper makes a conclusion of the research and gives a preview of the further research development.