基于后缀动态多缓存协作的流媒体分发技术

Streaming Scheme Based on Media Suffix Multi-Cache Cooperation

在Internet上高效传输流媒体数据是推广诸如视频点播等应用的基础.现有方案仅考虑了采用单代理结构的前缀缓存和服务器调度来降低骨干网带宽消耗和服务器负载.在带前缀缓存的Batchpatching基础上提出了后缀的动态缓存算法ICBR,并提出了基于ICBR缓存算法的多缓存协作体系结构及协作算法MCC.仿真结果表明,基于ICBR的多缓存协作显著地降低了获取补丁而导致的骨干网带宽的消耗,提高了客户端QoS同时也降低了服务器负载.

It is the basis for video applications such as Video On Demand to deliver the streaming media over Internet efficiently. Current schemes only considered prefix caching and server scheduling in single proxy architecture to lighten the over-consumption of backbone bandwidth and the overload of server. This paper proposed a dynamic cache algorithm ICBR (Incremental Caching Burst Release) of media suffix based on batch patching scheme that with prefix cached. A multi-proxy cooperative caching architecture and cooperative algorithm MCC (Multi-proxy Cooperative Caching) that works upon ICBR were also proposed. The simulation results show that cooperative caching of multi-proxy based on ICBR can remarkably decrease the consumption of the backbone bandwidth, reduce the server load and thus improve the client QoS.