一种ICN中的启发式路由机制

Heuristic Routing Mechanism in ICN

互联网逐渐成为社会基础设施,现有TCP/IP体系结构面临诸多挑战,以信息中心网络(Information-Centric Networking,ICN)为代表的未来互联网成为研究热点。在基于名字路由的基础上,提出了一种面向ICN的启发式路由机制,即通过为满足回溯条件的兴趣包寻找其他可用接口再次进行转发来降低网络阻塞率,通过修改数据包沿途经过的路由器邻居节点的转发信息库(Forwarding Information Base,FIB)来实现对缓存的高效利用,以及通过引入"流行度"概念来提高内容存储库(Content Store,CS)的命中率。基于INTERNET2拓扑进行了仿真实现,结果表明该机制是可行和有效的。

Internet has become a social infrastructure.The current Internet architecture based on TCP/IP is faced with many challenges.This fact makes the clean slate design of future Internet architecture represented by Information-Centric Networking （ICN） become a hot research topic.In this paper,a heuristic routing mechanism in ICN was proposed.On the basis of name-based routing,a procedure was devised to look for other available interface through which the backtracking-condition-met interest packet will be forwarded,which can reduce the network blocking rate.Moreover,Forwarding Information Base （FIB） of neighbor nodes will be modified when data packets go through a router,which can realize the efficient use of cache.In addition,a concept of ＂popularity＂ was introduced to improve the Content Store （CS） hit rate.The proposed routing mechanism was implemented on INTERNET2 by simulation.The experimental resuits show that it is feasible and effective.