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针对对等网络点播系统中用户的连续播放或交互式应用操作需要快速定位资源的需求,提出一种分布式资源索引结构来提高定位目标缓存节点的效率.该索引结构由系统中自适应选择的相对稳定节点参与构建和维护,索引结构的运行基于这些相对稳定节点的协作进行,因而对系统动态性有较好的适应能力.提出的分布式轻量级资源索引机制可根据节点规模自适应调整,有较好的可扩展性.仿真实验表明:该索引结构能够以较低的开销帮助用户在3或4跳内基本完成资源定位,有效缩短了其交互式体验的反应延迟.
In order to improve the efficiency of locating target cache nodes, a distributed resource index structure is proposed to meet the demand of fast location resources for continuous play or interactive application operation of users in peer-to-peer network on-demand system. The index structure is adaptively selected by the system Relatively stable nodes are involved in the construction and maintenance, and the operation of the index structure is based on the cooperation of these relatively stable nodes, so it has good adaptability to system dynamics. The proposed distributed lightweight resource indexing mechanism can be adaptively adjusted according to the node size , And has good scalability.The simulation results show that the index structure can help users to basically complete resource positioning in 3 or 4 hops with a lower overhead, which effectively shortens the response delay of their interactive experience.