摘要： 分析基于网络编码的P2P流媒体，采用push策略提升网络编码的性能，通过仿真实验发现，该策略会导致节点收到一定量的线性相关数据块，而线性相关数据块不能被用以恢复原始数据块，从而造成网络带宽浪费。研究拓扑形状与该问题的内在关系，并提出能够有效阻止该类问题产生的拓扑构造规则。

关键词: 对等网络, 网络编码, 流媒体, 拓扑

Abstract: The P2P streaming media based on network coding is analyzed. A push strategy is usted to promote the performance of network coding. Though the simulation experiment, some facts are discovered that the strategy will lead to linearly dependent blocks which are impossible to be used to recover original blocks and consume large numbers of bandwidth. The relation between topology and this problem is researched, and the topology construction rule that can effectively avoid this problem is presented.

Key words: Peer-to-Peer network, network coding, streaming media, topology

中图分类号: 

• TP393.09