摘要： 分析基于推、拉和混合模式的P2P直播系统存在的问题，设计并实现一种分阶段推和拉相结合的P2P流媒体直播系统，引入节点评价机制和Gossip协议动态调整覆盖网双层拓扑结构，并通过补丁机制减少启动时延。系统试运行结果表明，该直播系统能有效减少网络传输负荷，提高分发效率。

关键词: 对等计算, 流媒体, 直播

Abstract: This paper analyzes the problems of push, pull and hybrid mode based Peer-to-Peer(P2P) live system. A phased push and pull combined P2P live media streaming system is designed. A peer evaluation mechanism and Gossip protocol are introduced to adjust the double topology of overlay network. A patching mechanism is used to reduce the start delay. The test results show that it can efficiently reduce the burden of the network transmission and improve the speed of data distribution.

Key words: P2P computation, media streaming, live

中图分类号: 

• TP393.02