基于副本通告的内容中心网络快捷路由机制  

Short-cut Routing Mechanism in Content Centric Network Based on Replicas Notification

作　　者：刘涛[1] 程东年[1] 田铭[1] 

机构地区：[1]国家数字交换系统工程技术研究中心,郑州450002

出　　处：《计算机工程》2014年第5期62-67,共6页Computer Engineering

基　　金：国家"973"计划基金资助项目(2012CB315901);国家"863"计划基金资助项目(2011AA01A101;2011AA01A103);国家科技支撑计划基金资助项目(2011BAH19B01)

摘　　要：内容中心网络是一种新的网络体系结构,采用以名字为标识的内容路由。然而,基本的内容中心网络路由机制仅对服务器的内容建立路由表项,缺少到达节点上缓存的内容副本路由,导致节点缓存资源利用率低,产生较大的内容访问时延。针对该问题,通过将节点缓存的副本向其他节点进行通告,提出一种快捷路由机制,使得节点能够感知邻居节点的内容副本,从而选择最优内容源以获取内容。仿真结果表明,相比不考虑节点副本路由的机制,快捷路由机制可明显减少用户请求的平均时延,在节点缓存容量为60个内容对象时,减少了43%的服务器负载。Content Centric Network（CCN） is a novel paradigm for content distribution with name-based routing. However, the basic CCN routing mechanism only creates routing entries to server contents and lacks routing to cache contents on nodes, leading to low cache resource utilization and large content access latency. To solve this problem, a Short-cut Routing（SCR） is presented, based on the notification of cache content replicas, which enables nodes to perceive neighbor’s cache information and retrieve contents from the best routing content source. Simulation results show that the SCR significantly reduces the average delay compared to the basic routing mechanism which does not take into account routing to cache contents, gives the cache capacity of the 60 content objects, and SCR reduces the server load by 43%.

关 键 词：内容中心网络 快捷路由 内容活跃度 命名数据网络 马尔可夫链 副本 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]