摘要
为屏蔽网络传输延时,减小核心内容服务器负载,同时最大限度利用本地带宽资源,介绍了使用代理服务器对视频对象进行缓存和转发的方法.提出将代理服务器缓存空间化分为静态存储和动态存储两部分,对静态存储空间使用线性规划的方法进行缓存数据初始化,对动态存储空间采用动态数据替换算法对缓存空间进行管理.仿真实验结果表明,该方法在有限的代理缓存空间下提供满意的用户点播成功率和缓存命中率,大大减小用户点播时延.
For shielding the transmission delay of multimedia in the Internet, decreasing the context server load and using the local net resources more effectively, we discuss the method of multimedia streams distribution based on proxy server. Proxy storage is divided into static and dynamic storage. Linear programming is used to initialize the static storage; and special cache replacement arithmetic is used to manage the dynamic storage. The simulated results show that the method increases the demandsuccess ratio and byte-hit ratio and decreases the video demand delay.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2005年第5期141-145,共5页
Engineering Journal of Wuhan University
关键词
代理服务器
线性规划
缓存数据替换
流媒体
proxy server
linear programming
cache replacement
streaming media
