| 交互式流媒体代理缓存 |
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| 引用本文： | 刘 威, ChunTung Chou, 程文青, 杜 旭. 交互式流媒体代理缓存[J]. 计算机研究与发展, 2006, 43(4): 594-600. |
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| 作者姓名： | 刘威 ChunTung Chou 程文青 杜旭 |
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| 作者单位： | 华中科技大学电子与信息工程系,武汉,430074;新南威尔士州大学计算机科学和工程学院,悉尼 |
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| 基金项目： | 中国科学院资助项目;湖北省自然科学基金;澳大利亚研究院国际合作基金 |
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| 摘 要： | 基于代理的流媒体应用中通常假设用户总是从媒体内容的起始部分请求播放.然而，在交互式场景下用户的焦点可能是媒体内容的任意部分.针对交互式流媒体应用，提出了一种基于分段的流行度敏锐(popularity-wise)缓存算法，适用于缓存任意媒体内容流行度分布下的热点部分.仿真结果表明，现有的分段缓存算法的性能随着用户交互强度的增加而显著下降，而流行度敏锐算法在不同的用户请求模式和交互强度下都可以提供较低的用户响应时延和链路占用带宽.
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| 关 键 词： | 代理缓存 交互式流媒体 基于分段的缓存 内容流行度 |
| 收稿时间： | 2004-06-23 |
| 修稿时间： | 2005-08-24 |
Proxy Caching for Interactive Streaming Media |
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| Liu Wei, ChunTung Chou, Cheng Wenqing, Du Xu. Proxy Caching for Interactive Streaming Media[J]. Journal of Computer Research and Development, 2006, 43(4): 594-600. |
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| Authors: | Liu Wei ChunTung Chou Cheng Wenqing Du Xu |
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| Affiliation: | 1, Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074;2, School of Computer Science and Engineering, University of New South Wales, Sydney |
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| Abstract: | A typical assumption in proxy-based streaming application is that users favor the beginning part of the media object. However, it is observed that any parts of the media content can be the focus of users in interactive scenarios. A new segment-based caching algorithm, named popularity-wise caching, is proposed for interactive streaming. It can cache the hot part media content under arbitrary distribution of media content popularity. Simulations results show that the performances of current segment-based caching algorithms degrade with the increase of user interactivity, while popularity-wise caching can provide lower user startup latency and bandwidth consumption under different user request modes and interactive degrees. |
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| Keywords: | proxy caching interactive media streaming segment-based caching content popularity |
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