一种内容中心网络中的热区控制及内容调度缓存算法

摘要

针对内容中心网络中同质化缓存造成的节点负载不均和存储资源无法有效利用的问题,提出一种热区控制及内容调度缓存算法.在内容请求时,根据节点介数与节点访问度综合判断节点热度,筛选出负载过重节点;缓存决策时,以流行度为依据将内容调度至空闲邻居节点,并设置生命期控制机制,从而达到分散请求、消除热区的目的.仿真结果表明该算法减少了请求时延与路由跳数,在提高缓存命中率的同时,有效改善了负载在节点上分布的均衡性.%A hotspot control and content dispatch caching algorithm is proposed to improve the homogeneous caching caused load imbalance and low storage utilization.When the content request arrives,the overloaded nodes are selected synthetically by betweenness and access degree.The content is dispatched to idle neighbors with popularity for caching decisions,combined with a lifetime control mechanism.So that the request balancing and the hotspot relieving are achieved.Simulation results show that,with the decrease of the request latency and hop counts,our proposed algorithm can effectively improve the load imbalance and increase the hit rate as well.