一种新的基于代理缓存的流媒体分送策略  

A Novel Delivery Strategy for Streaming Media Based on Proxy Caching

作　　者：覃少华[1] 李子木[2] 蔡青松[1] 胡建平[1] 

机构地区：[1]北京航空航天大学计算机学院,北京100083 [2]清华大学信息网络工程研究中心,北京100084

出　　处：《计算机工程》2005年第2期33-35,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60103005)

摘　　要：提出了一种新的带缓存的补丁调度策略,有效地将代理缓存与服务器调度技术结合起来,采用基于缓存窗口自适应伸缩的缓存分配方案,实现了流媒体对象在代理服务器中缓存的数据段数与其流行度成正比的原则。理论分析及实验结果表明,该策略有效地降低了服务器及骨干网络带宽资源的消耗,对于客户请求到达速率的变化具有非常好的适应性。In order to improve the system effectiveness, a novel patch scheduling strategy with proxy caching is proposed, which can joint the proxy caching and server scheduling strategies in an effectively way. It employs the scheme of cache allocation based on the cache window size, which could be increased or decreased adaptively according to the popularity of the requested object. Such as, the principle would be realized, of which the number of segments cached for each object is in proportion to their popularity at proxy server. Theoretical analysis and simulation results show that this strategy can effectively reduce the server and network bandwidth usage, and also has a very good adaptability for the variety of the request arrival rate.

关 键 词：代理缓存 流媒体 代理服务器 补丁 窗口 调度策略 带宽资源 客户 调度技术 理论分析 

分 类 号：TP393[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]