摘要
针对内容中心网络(CCN,content centric networking)中沿路径缓存策略存在的问题,设计了一种最大介数节点和边缘节点协同的缓存策略。根据网络拓扑特性,在最大介数节点感知流行内容,边缘节点协同跟踪;依据内容流行度和缓存空间,指定内容在传输路径的存储位置。仿真实验表明,与经典算法相比,该策略有效提高了缓存命中率,同时降低了平均路由跳数比,改善了缓存系统的效率。
To overcome the problems of the on-path caching schemes in the content centric networking,a coordinated caching scheme based on the node with the max betweenness value and edge node was designed.According to the topology characteristics,the popular content was identified at the node with the max betweenness value and tracked at the edge node.The on-path caching location was given by the popularity and the cache size.Simulation results show that,compared with the classical schemes,this scheme promotes the cache hit ratio and decreases the average hop ratio,thus enhancing the efficiency of the cache system.
出处
《通信学报》
EI
CSCD
北大核心
2017年第2期132-142,共11页
Journal on Communications
基金
国家自然科学基金创新研究群体基金资助项目(No.61521003)
国家重点基础研究发展计划("973"计划)基金资助项目(No.2012CB315901
No.2013CB329104)
国家自然科学基金资助项目(No.61372121
No.61309019
No.61309020
No.61572519
No.61502530)
国家高技术研究发展计划("863"计划)基金资助项目(No.2015AA016102
No.2013AA013505)~~
关键词
内容中心网络
沿路径协同缓存
流行内容
感知与跟踪
content centric networking
on-path coordinated caching
popular content
awareness and tracking
