Research On Streaming Media Service Platform Based On P2P Technology

Traditional VoD (Video on Demand) streaming media service systems are mainly based on C/S (client/server) architecture, such as Media Center and HELIX Server. In such system, streaming media service provider is a server and a streaming media service user is a client, the top two factors influence the quality of streaming media service are the out band width of the server and the condition of the server. For just a few parallel video-streams the server needs significant performance which results in high costs building up the whole infrastructure. Furthermore scalability seems to be a problem. As soon as the server becomes popular the quality of server decreases. All of these restrict the development of VoD streaming media applications.P2P(Peer To Peer) means each pitch point in the distributional system is logically coordinated. Unlike C/S (client/Server) model, the P2P model no longer distinguishes server from client, and each pitch point in the system can carry on the data communication directly, instead of through the middle server, whose essence lies in full uses of the terminal device's handling ability. Each pitch point in the system is not only the provider of the service but also the consumer of the service. There are several factors which made P2P so popular: cheap computing power, big storage capacities, and network load distribution.Combination of the techniques will use benefits of patching techniques and p2p concepts. In such system, every arrived client not only consumes resources, but makes his contribution, in sense of the staring stream received video. When the arrive rate of the clients is high ,there are more clients that contribute to resources, which in turn increases the overall capability of the system and therefore the number of clients that can be served.Firstly, this article analyzes the main features and research status of streaming media service system based on P2P technique, and studies the key technology of resources control from three aspects: control and maintenance of node resources, P2P resource discovery and fragment selection algorithm. On the basis the article describes in detail peer group and management during the design and development process for peer client software, memory management and scheduling and fragment selection algorithm. In the light of the background description of the management structure, the article puts forward design...