Design And Implementation Of P2P-based VOD System

With the development of network and multimedia technique, the demand of people on the network video on demand is more and more high.High definition, fluency and interaction have become the requirements of people to video on demand, in the traditional C / S model of video on demand system, client terminal to watch video need to rely on the center of the video server, and the higher bandwidth demand, the video server the easilier becomes the bottleneck of network, when the network size is large, the burden on the server will be more heavy, once the server is crash, the entire network will be paralysis. In addition the server's capacity is limited, often cannot respond timely to every client, it will cause the utilization rate of resources is low. While the P2P network does not have a centralized server, and the bottleneck of the system is not exist, each node acts as both a client and a server, thus it has higher resource utilization rate.The VOD system based on P2P services designed by this paper includes background service and upstage user two main modules. The background service module mainly includes: bunch planting management, video content services, directory server and user account server module. In the server through the above modules to realize unified management of both dibble seeding program and user account ,directly provide authenticated users with video data resources, efficiently schedule effective nodes in the whole P2P system ,rapidly help to construct P2P network, provide a good platform environment for the video on demand system. The upstage user module mainly make up of a client and a web page dibble seeding based on the browser two parts. The client is a user player, users can directly watch the program from background content, and the web page dibble seeding based on the browser supply users with direct P2P video on demand program through the browser in this system.Through the research of VOD system based on P2P, to realize a server which can carry a large of concurrent users, to solve the limit problem caused by insufficient bandwidth for users to accomplish online VOD, so as to improves the users'watching video fluency.