静态与动态结合的流媒体缓存替换算法研究  

Research on streaming media cache replacement algorithm of static and dynamic state combination

作　　者：孙昕[1] 陈德运[2] 

机构地区：[1]哈尔滨医科大学基础医学院,黑龙江哈尔滨150081 [2]哈尔滨理工大学计算机科学与技术学院,黑龙江哈尔滨150080

出　　处：《计算机工程与设计》2012年第4期1495-1498,1659,共5页Computer Engineering and Design

摘　　要：为了在基于对等网的流媒体点播系统中高效地利用节点缓存区来提高流媒体服务质量,提出了一种静态与动态结合的缓存替换算法。采用将节点缓存区分为3个区的方法,综合考虑了数据块备份量的均衡性和节点跳播操作的命中率,使得节目数据块在各对等节点间缓存得到全局优化,从而有效提高播放质量。仿真实验结果表明了该算法在启动延迟和服务器负载等方面的优越性。To make good use of peer cache region and enhance the quality of service of streaming media in peer to peer video-on- demand system, one static and dynamic combination cache algorithm is proposed. The method of peer cache is divided into three parts, the proportionality of the data blocks distribution and the hit rate of peer skip play operation is considered comprehensively to enhance the quality of service, the advantages of this algorithm in start delay and server load by experiments is demonstrated.

关 键 词：缓存替换算法 对等网络 流媒体 点播系统 服务质量 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]