支持预部署的机顶盒P2P点播系统

P2P-vod system for set-top box with pre-deployment module

针对机顶盒区域化部署方式以及机顶盒用户的播放行为特点，使得中心化的IPTv_VDd系统在播放高峰期时区域到点播服务器的链路出现带宽瓶颈的问题，提出了一种支持预部署的机顶盒P2P点播系统STB-Video。对机顶盒用户行为以及IPrrV系统拓扑结构进行了分析，传统的PC端P2P_V0d已不适用于机顶盒，STB-Video充分挖掘用户播放历史记录，利用聚类和推荐算法获得区域预部署影片，使得区域内部节点加强数据协作，从而降低了区域上下行链路带宽。STB-Video系统相对于Zebra系统算法，播放高峰期的区域链路带宽下降了6％～30％，表明了STBvideo系统的优越性。

To solve the problem of the bandwidth bottleneck in the traditional IPTV Vod system during the peak hours, the STB-Video system is designed which is a P2P Vod system with collaborative pre-deployment module based on recommendation scheme, according to the particular user behavior and the regionalization deployment of STBs. The STB-Video system pre-de ploys the VoD contents which are recommended on the STBs of the region during idle hours, and the STBs in the same region strengthen data collaboration using P2P protocol which results in the reducing of the bandwidth of the VoD server. The experi mentation shows that the bandwidth can be reduced by more than 6%-30% during peak hours by STB-Video compared to the Zebra system.