Design And Implement A Peer-to-Peer Media Streaming Live System

The quick development of P2P Technology has made itself a powerful solution in building up large-scale distributed system. As one of the magnificent applications of P2P technology, P2P streaming media system has become one of the hotspot of P2P research. In the perspective of way of transmission, P2P streaming media can be transmitted in two ways: based on ALM(Application Layer Multicast) and based on unicast. The second one fits for the network environment which has different upload bandwidth and download bandwidth, and cannot afford a high-bitrate stream media transmission, while the first one is applied to fit transmitting high-bitrate stream media in a high bandwidth environment, for example, to realize a live broadcast in a large size enterprise network and campus network.Currently, products of an internet applied P2P stream media system based on unicast has been developed, like pplive, coolstream etc. This mode of system is restricted by current internet conditions thus can not provide a high quality stream media service and the QoS is not stable. While the area of stream media system based on ALM suited for the large scale Intranet still remains undeveloped. Concerning network environment, Intranet is much better than Internet and the clients of intranet ask more in the QoS than those using the internet. The stream media is most used for large scale live broadcast in Intranet, and the bottleneck relies on the performance of server and the bandwidth of the server side. In this connection, P2P stream media system based on ALM is just fitful.In this time, research on ALM are yet in the level of theoretical discussion. They usually simulate their algorithms with various network simulators. Few applied product has been developed. This thesis, based on the author' s practice, trying to set up a P2P stream media system based on ALM, which can utlize current stream media transport protocol and stream media server system. Thereby, we can solve this problem in the traditional C/S pattern system described above by the lowest cost.