Abstract: A novel architecture for peer-to-peer streaming media system is presented, which is named Zigzag enhanced topology-aware architecture(ZETA). The corresponding media content duplication and caching algorithm ZSDC(ZETA segment-based duplication and caching) are designed. Simulation experiment results show that, by employing the ZSDC algorithm, the ZETA structured system improves the quality of streaming service effectively and saves the storage resource of peers, provides streaming media service platform with strong expansibility, good performance, high service quality, loading-balance and fault-tolerance characters.

Key words: peer-to-peer network, streaming media, content duplication and caching algorithm, Zigzag enhanced topology-aware architecture

摘要： 提出了一种可感知拓扑的增强型、锯齿型流媒体系统结构——ZETA，设计了一种基于ZETA结构的分段流媒体内容复制与替换算法ZSDC。仿真实验表明，ZETA结构与ZSDC算法配合，提高了流媒体系统的服务质量，节省了节点的存储资源，提供了可扩展性强、性能优越、QoS良好、具有负载均衡和容错机制的流媒体服务平台。

关键词: 对等网络, 流媒体, 内容复制与缓存算法, 可感知拓扑的增强型锯齿型结构

CLC Number: 

• TP37