| 基于能量模型的交互式流媒体缓存置换策略 |
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| 引用本文： | 宋晓华,黄河清,曹元大.基于能量模型的交互式流媒体缓存置换策略[J].北京理工大学学报,2007,27(8):684-688. |
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| 作者姓名： | 宋晓华 黄河清 曹元大 |
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| 作者单位： | 北京理工大学,计算机科学技术学院,北京,100081;北京理工大学,计算机科学技术学院,北京,100081;北京理工大学,计算机科学技术学院,北京,100081 |
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| 摘 要： | 针对交互式流媒体应用,提出一种基于能量模型(EM)的缓存置换算法.给出描述用户访问模式的片断划分和记录策略,并提出基于能量模型的内容流行度的表示方法;采用基于指数增长的缓存接入/释放策略,设计了新的效用函数实现缓存替换.仿真结果证明,EM算法能适应不同交互强度的用户访问模式,比传统的分段缓存具有更好的性能.
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| 关 键 词： | 流媒体 缓存置换 交互式应用 内容流行度 |
| 文章编号： | 1001-0645（2007）08-0684-05 |
| 收稿时间： | 2007/1/11 0:00:00 |
| 修稿时间： | 2007-01-11 |
Cache Replacement Strategy Based on Energy Model for Interactive Streaming Media |
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| SONG Xiao-hu,HUANG He-qing and CAO Yuan-da.Cache Replacement Strategy Based on Energy Model for Interactive Streaming Media[J].Journal of Beijing Institute of Technology(Natural Science Edition),2007,27(8):684-688. |
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| Authors: | SONG Xiao-hu HUANG He-qing and CAO Yuan-da |
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| Institution: | School of Computer Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | A new energy model based cache replacement strategy is proposed for interactive streaming.First,a division and record method of media segments is presented to record the information of users' visits and the expression of content popularity is presented by the energy model.Then,adopting exponential cache admission/release policy,a new benefit function is designed to control the cache replacement.Simulation results show that the energy model strategy outperforms the traditional segment-based cache algorithms. |
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| Keywords: | streaming media cache replacement interactive application content popularity |
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