基于P2P技术的时移电视系统方案

本文针对时移电视业务,提出了基于P2P技术的系统解决方案.时移电视系统由一个分片处理器和一个媒体定位器以及若干对等节点组成,直播媒体流经分片处理器处理后切分成媒体分段和分块,媒体定位器完成媒体分段的定位服务,对等节点以随机概率进行媒体录制和存储,节点之间直接进行媒体块传输.理论分析及实验结果表明,该系统方案具备良好的扩展性和业务体验质量.

Scheme of Time Shifted TV System Based on P2P

A time shifted television system based on P2P technology is proposed. It is composed of one slicer server, one media locator server and many peer nodes. The slicer server slices the input live video stream to the media segments and media blocks. The media locator server manages the locations of the segments in the P2P network, and services those peers that request certain segments from the corresponding source peers. Peers record the media randomly and store it in RAM or on disk. Both the analysis and experiment results show that the proposed system has a good expansibility and a high service QoS.