随着IPTV的迅速发展和用户量的激增,现有IPTV采用的纯CDN网络架构扩展性较差,在花销上需要付出很大代价.针对该问题,详细探讨了在电信现网条件下实施机顶盒P2P的可行性,以及影响P2P效果的因素,主要包括上传速率与节目码流的比值以及P2P策略和机制的选择这两个要点.对大量的IPTV用户数据进行了特征分析,得到了一些值得IPTV P2P相关研究可以参考的统计结果.%Nowadays, with the rapid development of IPTV and the sharp increase in subscribers, the pure CDN architecture adopted by existing IPTV has showed its limitation in expansion, and needs to pay a lot to expand their service scale. In light of this, in the paper we elaborately discuss the feasibility of implementing set-top box P2P in condition of CDN at Shanghai Telecom, and find out the factors that impacts the effect of P2P, mainly including two key factors; the ratio of upload speed and bit rate, and the selection of P2P strategy and mechanism. We have done the behaviour characteristics analysis based on huge number of IPTV user data of Shanghai Telecom, the statistic results attained might be helpful for other IPTV P2P researches.
展开▼
