基于流行内容感知和跟踪的协同缓存策略

摘要

To overcome the problems of the on-path caching schemes in the content centric networking, a coordinated caching scheme based on the node with the max betweenness value and edge node was designed. According to the topol-ogy characteristics, the popular content was identified at the node with the max betweenness value and tracked at the edge node. The on-path caching location was given by the popularity and the cache size. Simulation results show that, com-pared with the classical schemes, this scheme promotes the cache hit ratio and decreases the average hop ratio, thus en-hancing the efficiency of the cache system.%针对内容中心网络(CCN,content centric networking)中沿路径缓存策略存在的问题,设计了一种最大介数节点和边缘节点协同的缓存策略.根据网络拓扑特性,在最大介数节点感知流行内容,边缘节点协同跟踪;依据内容流行度和缓存空间,指定内容在传输路径的存储位置.仿真实验表明,与经典算法相比,该策略有效提高了缓存命中率,同时降低了平均路由跳数比,改善了缓存系统的效率.