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.
出处
《计算机工程与设计》
CSCD
北大核心
2012年第4期1495-1498,1659,共5页
Computer Engineering and Design
关键词
缓存替换算法
对等网络
流媒体
点播系统
服务质量
cache replacement algorithm
peer to peer
streaming media
video-on-demand system
quality of service
