流媒体代理缓存系统的设计与仿真  

Design and Simulation on Streaming Proxy Cache System

作　　者：刘威[1] 程文青[1] 

机构地区：[1]华中科技大学电子与信息工程系,武汉430074

出　　处：《系统仿真学报》2007年第8期1872-1875,1893,共5页Journal of System Simulation

基　　金：国家自然科学基金(60572049;60602029);湖北省自然科学基金(2005ABA264)。

摘　　要：现有的代理缓存仿真器主要针对WEB对象进行设计,不能满足仿真流媒体缓存的需求。针对流媒体点播中用户交互式请求的特点,设计了用户记录合成工具模拟不同交互程度的用户访问记录;针对流媒体文件较大、支持连续播放的需求,设计了代理缓存仿真器,支持媒体不连续缓存磁盘管理、媒体播放流调度等功能。实验结果表明,该仿真系统可以模拟实际交互式用户访问记录,可以评估不同交互式流媒体场景下的流媒体缓存算法的性能。Most of proxy cache simulators are designed for WEB caching, which cannot not be used for streaming media caching. In order to simulate the interactive characteristic in streaming-on-demand application, a synthetic user requests generator is designed to provide different kinds of interactive user traces. In order to meet the special requirements in storing large segment of media file and continuously playing media, a proxy cache simulator is designed to provide functions of un-continuous cache disk management and media stream scheduling. Simulation results show that, it can emulate real interactive user requests and evaluate proxy caching algorithm under arbitrary interactive streaming scenarios.

关 键 词：代理缓存 流媒体 交互式请求 仿真 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TP37[自动化与计算机技术—计算机科学与技术]