| 请求下降邻域叠加选取分布式P2P 视频点播调度 |
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| 引用本文： | 李 蕾,李 玲. 请求下降邻域叠加选取分布式P2P 视频点播调度[J]. 图学学报, 2018, 39(1): 30. DOI: 10.11996/JG.j.2095-302X.2018010030 |
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| 作者姓名： | 李 蕾 李 玲 |
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| 作者单位： | 1. 山西传媒学院传媒工程系，山西 晋中 030619；2. 新余学院，江西 新余 338004 |
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| 摘 要： | 为实现对等架构的低成本视频流传输和实时播放要求，提出基于请求下降叠加选取的分布式P2P 视频点播调度算法。首先，基于叠加技术构建P2P 视频点播的技术指标，充分考虑输入邻域节点、输出邻域节点和媒体服务器负载3 组优化指标，构建叠加架构和分布式算法流程；其次，利用请求下降策略对发送节点和服务节点选取进行改进，解决可能出现的带宽低利用率和无效的视频播放问题；最后，通过BitTorrent 视频点播系统对所提算法的有效性进行了验证。
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| 关 键 词： | 请求下降 叠加选取 分布式 P2P视频 点播 |
Distributed P2P Video on Demand Scheduling Based on Request Drop Neighborhood Overlay |
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| LI Lei,LI Ling. Distributed P2P Video on Demand Scheduling Based on Request Drop Neighborhood Overlay[J]. Journal of Graphics, 2018, 39(1): 30. DOI: 10.11996/JG.j.2095-302X.2018010030 |
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| Authors: | LI Lei LI Ling |
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| Affiliation: | 1. Department of Communication Engineering, Communication University of Shanxi, Jinzhong Shanxi 030619, China;2. Xinyu University, Xinyu Jiangxi 338004, China |
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| Abstract: | In order to achieve peer-to-peer architectures for low cost video stream transmission andreal-time playback requirements, this paper proposes a distributed P2P video on demand schedulingalgorithm based on request drop neighborhood overlay. Firstly, this paper constructs technical indexof P2P VOD (video on demand) based on the superposition technique, considers the three parametersoptimization index of the input neighborhood nodes, the output neighborhood nodes and the mediaserver load, and then constructs the overlay structure and distributed algorithm flow. Secondly, thispaper uses the request descent strategy to improve the selection of the sending nodes and servicenodes, which can solve the problem of broadband low utilization ratio and invalid video playback.Finally, experimental results based on the BitTorrent VOD system verify the effectiveness of theproposed algorithm. |
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| Keywords: | request drop overlay selection distributed P2P video on demand |
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