摘要：

信息中心网络默认的LCE缓存策略在数据包返回路径上的每个节点缓存内容,会产生大量冗余副本,无法充分利用缓存资源。针对该问题,提出基于节点热度与缓存替换率的缓存策略。在数据包返回路径上选择特殊节点缓存内容,考虑网络流量在不同区域和不同时间段内的差异性,周期性地计算节点热度和缓存替换率,并将其作为内容是否被缓存在节点上的度量指标。实验结果表明,相对于LCE和CLFM策略,该策略能有效降低平均请求跳数和源端命中率,获得较高的缓存收益。

关键词: 信息中心网络, 协作缓存, 节点热度, 缓存替换率, HotRR缓存策略

Abstract:

The default LCE caching strategy of the Information-Center Networking(ICN) which caches content on each node on the return path of the packet generates a large number of redundant copies and cannot make full use of the cache resources.To solve this problem,a caching strategy based on heat and cache replacement rate of node is proposed.It chooses special nodes on packet return path cache content.Considering the network traffic of regional differences and different time difference,it computes heat cache and replacement rate of node periodically,as a measure of whether the content is cached in node.Experimental results show that,compared with LCE and CLFM strategy,the proposed strategy can reduce average number of hops and server hit ratio,meanwhile getting higher caching benefit.

Key words: Information-Centric Network(ICN), cooperative caching, node heat, cache replacement rate, HotRR cache strategy

中图分类号: 

• TP391