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提出了一种基于衍生树的P2P系统框架,以支持交互式流媒体应用.该系统利用分布式发现服务来进行资源定位,并通过基于衍生树的缓存结构来维护数据传输拓扑.使用基于衍生树的系统管理策略可以显著地降低节点动态加入和退出等交互操作的开销.另外,通过使用分布式散列表(distributed hash table,简称DHT)来维护会话,可以较低的代价实现资源查找、服务重构和拓扑维护等任务.仿真实验结果表明,与现有的P2P流媒体系统相比,该系统具有良好的性能,其用户交互操作的开销可以降低超过50%.
This paper presents a P2P-based framework based on a tree to support interactive streaming media applications. This system uses distributed discovery service to locate resources and maintain data transmission topology through a derivative tree-based cache structure. System management strategy can significantly reduce the overhead of nodes such as dynamic joining and withdrawing.In addition, through the use of distributed hash table (DHT) to maintain the session, resource search can be realized at a lower cost and the service weight Structure and topology maintenance tasks.The simulation results show that compared with the existing P2P streaming media system, the system has good performance, and the cost of user interaction can be reduced by more than 50%.