通信学报 ›› 2017, Vol. 38 ›› Issue (6): 10-18.doi: 10.11959/j.issn.1000-436x.2017113

• 学术论文 • 上一篇    下一篇

基于节点中心性度量的内容中心网络缓存机制

蔡岳平1,2,刘军2,樊欣唯2   

  1. 1 重庆大学信息物理社会可信服务计算教育部重点实验室,重庆 400030
    2 重庆大学通信工程学院,重庆 400030
  • 修回日期:2017-05-08 出版日期:2017-06-25 发布日期:2017-06-30
  • 作者简介:蔡岳平(1980-),男,江苏丹阳人,重庆大学副教授、硕士生导师,主要研究方向为数据中心网络、光通信网络、未来互联网等。|刘军(1990-),男,江西遂川人,重庆大学硕士生,主要研究方向为内容中心网络、软件定义网络等。|樊欣唯(1992-),女,重庆人,重庆大学硕士生,主要研究方向为内容中心网络、网络功能虚拟化。
  • 基金资助:
    国家自然科学基金资助项目(61301119);教育部高等学校博士学科点专项科研基金资助项目(20120191120025);教育部留学归国人员启动基金资助项目(1020607820140002)

Node centrality metric based caching mechanism in content-centric network

Yue-ping CAI1,2,Jun LIU2,Xin-wei FAN2   

  1. 1 Key Laboratory of Dependable Service Computing in Cyber Physical Society,Chongqing University,Chongqing 400030,China
    2 College of Communication Engineering,Chongqing University,Chongqing 400030,China
  • Revised:2017-05-08 Online:2017-06-25 Published:2017-06-30
  • Supported by:
    The National Natural Science Foundation of China(61301119);Research Fund of Young Scholars for the Doctoral Program of Higher Education,Ministry of Education(20120191120025);The Scientific Research Foundation for the Returned Overseas Chinese Scholars,Ministry of Education(1020607820140002)

摘要:

为了降低内容中心网络的缓存内容冗余度和提高缓存内容命中率,提出一种基于节点中心性度量的缓存机制(CMC)。CMC利用控制器获取整个网络的拓扑结构和缓存空间空闲率,根据拓扑的连接关系分别计算各节点的度中心性、紧密中心性和介数中心性,并将这3个度量和缓存空间空闲率作为缓存节点选择的重要指标。仿真实验表明,与传统内容中心网络(CCN)缓存机制相比,CMC 可以有效地提高缓存内容命中率,降低获取内容的跳数和平均请求时延。

关键词: 内容中心网络, 缓存机制, 中心性, 度量

Abstract:

In order to reduce the cache redundancy as well as increase the cache hit ratios in content-centric networks,the node centrality metric based caching mechanism (CMC) was proposed.CMC utilized controllers to obtain the topology of the whole network and the idle rate of cache space.According to the connection relation of the topology,the degree centrality,closeness centrality and betweenness centrality of nodes were calculated.When CMC choose the caching nodes,it took the three metrics and the idle rate of cache space into account.Simulation results show that CMC can effectively increase the cache hit ratios and reduce the content fetching hops and average request delay compared with the traditional routing algorithms in CCN.

Key words: content-centric network, caching mechanism, centrality, metric

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