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节点缓存决策策略是信息中心网络(ICN)中缓存技术研究的核心问题之一.针对ICN提案的CEE方案的较大冗余和改进的Betw方案不能满足高介数节点线速处理要求等问题,提出一种基于节点社团重要度的节点缓存决策策略(CDS-NIC策略),将内容缓存到用户最容易获取的社团内的节点处.在多种实验条件下对CDS-NIC策略进行了仿真验证,结果表明该策略与CEE方案和Betw方案相比,能更好地提升包括缓存命中率、跳数减少率、内容差异性及替换数量等在内的网络缓存性能指标.
Node caching decision strategy is one of the core issues in the study of caching technology in Information Center Network (ICN) .Considering the large redundancy of CEE scheme and the improved Betw scheme for ICN proposal, This paper proposes a node caching decision strategy (CDS-NIC strategy) based on the importance of node community, which caches the content to the nodes in the community which users are most likely to obtain. The CDS-NIC strategy is simulated under various experimental conditions The results show that this strategy can better improve the network cache performance index including cache hit ratio, the number of hops reduction, content difference and replacement number compared with CEE scheme and Betw scheme.