基于节点介数和替换率的内容中心网络网内缓存策略

发布时间：2019-03-16 13:25

【摘要】：网内缓存技术是内容中心网络(CCN)的关键技术之一,CCN采用传统的ALWAYS缓存策略,会造成较大冗余。改进的Betw方案仅考虑了节点介数,容易造成高介数节点缓存更替频繁,内容可用性下降。为了解决这个问题,该文提出一种综合使用网络节点介数和节点缓存内容更替速率作为缓存决策度量的新型网内缓存策略BetwRep,通过权衡节点位置重要性和缓存内容时效性实现回传内容的最佳放置。最后,基于ndnSIM平台进行的网络仿真表明,该文提出的BetwRep缓存策略取得了比Betw方案和ALWAYS方案更低的源端请求负载和更少的平均跳数。
[Abstract]:In-net caching is one of the key technologies of content-centric network (CCN). CCN adopts traditional ALWAYS caching strategy, which will result in a large amount of redundancy. The improved Betw scheme only considers the node intermediate number, which easily results in frequent cache replacement and low content availability. In order to solve this problem, this paper proposes a new in-net cache strategy, BetwRep, which combines the number of nodes and the rate of node cache content replacement as the measurement of cache decision. The optimal placement of backhaul content is achieved by balancing the importance of node location and the timeliness of cache content. Finally, the network simulation based on ndnSIM platform shows that the proposed BetwRep cache strategy achieves lower source-side request load and less average hops than the Betw and ALWAYS schemes.
【作者单位】：北京邮电大学泛网无线通信教育部重点实验室;北京邮电大学北京市网络体系构建与融合重点实验室;南京(中国)未来网络产业创新中心;
【基金】：国家973计划项目(2012CB315801,2011CB302901) 中央高校基本科研业务费专项资金(2013RC0113)资助课题
【分类号】：TP393.02

【共引文献】