内容中心网络状态感知路由设计

Network status aware routing in content-centric network

为了提高内容中心网络的内容分发效率及降低网络开销,提出了网络状态感知的路由机制NSAR(network status aware routing)。NSAR利用从内容服务节点返回的数据分组收集当前网络状态信息,并在回传过程中对路径上各节点上匹配端口的转发概率进行更新,在对后续的兴趣分组进行转发决策时引入转发概率,从而提高内容分发效率。仿真实验表明,与传统内容中心网络路由算法相比,NSAR可以有效地降低内容请求平均时延,减少网络流通分组数以及降低网络带宽开销。

To improve the efficiency of content delivery and to reduce the network overhead of content centric network（CCN）, a network status aware routing（NSAR） mechanism was proposed. NSAR utilized data packets from the content server nodes to collect network statuses. The forwarding probability of the matching ports of the nodes on the path would be updated according to the network statuses. The subsequent interest packet forwarding would be based on the updated forwarding probability. Therefore the content delivery efficiency would be improved. Simulation results show that NSAR can effectively reduce the average delay of content requests and the number of packets in network as well as the network bandwidth overhead compared with the traditional routing algorithm in CCN.