ICN默认的LCE缓存策略在数据包返回路径上的每个节点缓存内容,产生大量冗余副本,无法充分利用缓存资源。本文在数据包返回路径上选择特殊节点以缓存内容。考虑网络流量的区域差异性以及不同时间段内差异性,本文提出基于节点热度和缓存替换率的缓存策略。周期性地计算节点热度和缓存替换率,作为内容是否被缓存在节点的度量指标。仿真实验结果表明,本文策略相对于LCE和CLFM,平均请求跳数更少,源端命中率更低,能获得更好的缓存收益。 ICN’s default LCE caching strategy caches content on every node in the packet’s return path, producing a large number of redundant copies that can not take full advantage of cache resources. This article chooses a special node on the packet return path to cache content. Considering the regional differences in network traffic and the differences in different time periods, this paper proposes a caching strategy based on node popularity and cache replacement rate. Node heat and cache replacement rates are periodically calculated as metrics of whether the content is cached at the node. The simulation results show that, compared with LCE and CLFM, the strategy of this paper has fewer average number of hops and lower hit rate at the source end, and can obtain better cache benefits.