【摘要】 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.更多还原

【Abstract】 The node’s cache decision strategy is one of the core issues about cache technology research in information centric networks( ICN). Considering that the CEE scheme produces a great of redundancy and the nodes with high betweenness cannot meet the requirements to the wire-speed processing in ICN,a novel in-network cache decision strategy is proposed based on node’s importance to communities( CDS-NIC) and the contents can be pushed to the pace where the user most easily acquired. Under a variety of experimental conditions,the simulation results showthat the NIC strategy,comparing with CEE scheme and Betwscheme,can improve the network cache performance,including: the cache hit rate,hop reduction ratio,content diversity ratio and the number of replacement.更多还原