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提出了一种内容缓存策略Path-LCE策略,结合传统NDN网络中的LCE缓存策略和路径协同策略两种策略来进行文件内容的缓存.在核心路由节点使用中采用路径协同策略来降低内容冗余,提高缓存空间的利用率;在边缘路由节点使用LCE策略,尽快使内容得到命中.使用ndnSIM的模拟数据显示,在一个混合的网络拓扑中的测试Path-LCE策略、策略较传统的LCE策略在核心路由器命中率上有较大提高,能够较好地利用核心路由缓存能力;同时,由于LCE策略的引入,其较路径协同策略在命中率上也有一定提升.
This paper proposes a strategy of content caching strategy Path-LCE, which combines the two strategies of LCE caching strategy and path coordination strategy in the traditional NDN network to cache the content of the document.When the core routing node uses path coordination strategy to reduce the content redundancy , To improve the utilization of cache space; LCE strategy is used by the edge routing nodes to get the content hit as soon as possible. The simulation data using ndnSIM shows that testing Path-LCE strategy in a mixed network topology is more effective than the traditional LCE strategy Core router hit rate has greatly improved, and can better use the core routing cache capabilities; the same time, due to the introduction of LCE strategy, its path coordination strategy in the hit rate also has some improvement.