| 一种基于节目流行度的自适应流调度方案 |
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| 引用本文： | 刘运强,余松煜,王向文.一种基于节目流行度的自适应流调度方案[J].高技术通讯,2005,15(9):19-23. |
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| 作者姓名： | 刘运强 余松煜 王向文 |
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| 作者单位： | 上海交通大学图像通信与信息处理研究所,上海,200030;上海交通大学图像通信与信息处理研究所,上海,200030;上海交通大学图像通信与信息处理研究所,上海,200030 |
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| 基金项目： | 863计划（2003AA103810）和高等学校博士学科点科研基金（20040248047）资助项目. |
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| 摘 要： | 提出了一种基于节目流行度的自适应流调度方案。该方案根据节目点播请求的强度自适应地调整分配给节目的信道数和带宽，并给出了在信道数改变过程中如何实现信道平滑过渡的方法。该方案综合了周期广播算法和流合并算法的优点。实验表明，采用此方案，在点播请求很少时能获得同流分并算法（如补丁算法）一样的性能，在点播请求很多时又有和周期广播算法一样少的服务带宽要求。
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| 关 键 词： | 周期广播 补丁算法 视频点播 节目流行度 |
| 收稿时间： | 2005-01-06 |
| 修稿时间： | 2005-01-06 |
An adaptive stream scheduling scheme according to the popularity of video stream |
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| Liu Yunqiang,Yu Songyu,Wang Xiangwen.An adaptive stream scheduling scheme according to the popularity of video stream[J].High Technology Letters,2005,15(9):19-23. |
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| Authors: | Liu Yunqiang Yu Songyu Wang Xiangwen |
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| Affiliation: | Institute of Image CommunicationInformation Processing, Shanghai Jiaotong University, Shanghai 200030 |
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| Abstract: | An adaptive video delivery scheme for varying workloads is proposed. The scheme absorbs the outstanding thoughts from periodic broadcast technique and muhicasting method. The technique smoothly adjusts itself to cope with a changing workload. The scheme tries to dynamically search the optimal number of channels assigned to video by the newly updated request rate so as to minimize the bandwidth requirement. Simulation results show that the scheme can adapt nicely to the changing client request rate and perform significantly better than the patching and periodic broadcast approaches in terms of total bandwidth requirement. |
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| Keywords: | periodic broadcast patching algorithm video-on-demand request rate |
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