| P2P视频点播系统的服务质量模型 |
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| 引用本文： | 邓光青,危婷,陈常嘉,朱巍,王斌,吴登荣.P2P视频点播系统的服务质量模型[J].北京邮电大学学报,2012,35(2):72-76. |
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| 作者姓名： | 邓光青 危婷 陈常嘉 朱巍 王斌 吴登荣 |
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| 作者单位： | 北京交通大学电子信息工程学院,北京,100044;上海聚力传媒技术有限公司技术研发部,上海,201203 |
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| 基金项目： | 国家重点基础研究发展计划项目(2007CB307101);国家自然科学基金项目(60672069,60772043) |
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| 摘 要： | 为了分析下载速度的波动性对点对点(P2P)视频点播(VoD)系统服务质量的影响,提出了一个播放中断模型.由该模型可知下载速度的波动性是导致中断的主要原因,增加预取数据量和增大下载速度都能减小中断数,但前者使中断推迟发生,后者使中断提前发生.在1次播放过程中,发生多次中断的现象是存在的,但其概率很小.通过对PPLive点播系统进行网络测量,验证了P2P点播系统中断的特性.
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| 关 键 词： | 点对点 视频点播 服务质量 中断 |
| 收稿时间： | 2011-03-14 |
A QoS Model of P2P VoD Streaming System |
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| DENG Guang-qing
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WEI Ting
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CHEN Chang-jia
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ZHU Wei
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WANG Bin
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WU Deng-rong.A QoS Model of P2P VoD Streaming System[J].Journal of Beijing University of Posts and Telecommunications,2012,35(2):72-76. |
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| Authors: | DENG Guang-qing WEI Ting CHEN Chang-jia ZHU Wei WANG Bin WU Deng-rong |
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| Affiliation: | 1. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Research and Development Department, Shanghai SynaCast Media Tech Company Limited, Shanghai 201203, China |
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| Abstract: | To analyze the influence of the dynamics of download speed on performance of peer to peer(P2P) video on demand(VoD) streaming systems,a playback interruption model is presented.The model shows that the dynamics of download speed is the main reason of the playback interruption.Both increasing the prefetched content and the download speed can reduce the number of interruptions.However,the former delays the interruption,the latter brings forward the interruption.The interruption may happen frequently in the whole playback process,though with low probability.Through network measurement towards PPLive VoD system,the behavior of the interruption can be verified. |
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| Keywords: | peer to peer video on demand quality of service interruption |
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