基于流行度及最小访问代价的MP2P协同缓存优化策略

An optimized MP2P cooperative caching method based on popularity and minimum access cost

为提高移动P2P网络服务质量,针对移动P2P网络特点,提出了一种分布式的移动P2P网络协同缓存优化策略。其主要思想是通过计算数据在网络中的流行度以及数据访问代价,优先缓存那些具有较高流行度并且能够较大幅度降低网络访问代价的数据,从而达到降低服务时延、减少网络通信开销、促进移动节点间的协作、提高网络的可用性及服务效率的目的。仿真实验结果表明,该策略能有效降低网络开销、减小网络延时,获得较好的性能。

In order to improve the quality of service of mobile peer-to-peer networks, according to characteristics of P2P networks, a novel distributed collaborative caching method is proposed. By com- puting the popularity and the cost of accessing data, the data whcih have higher popularity and much lower access cost will be cached first. Thus, the network gets low service delay and communication cost, also the cooperation between mobile nodes and the promotion of availability and efficiency can be a- chieved. Simulation results show that the strategy can effectively reduce network overhead and delay,and obtain better performance.