软件定义的内容中心网络的分段路由策略

Software defined content centric network's segment routing strategy

为降低软件定义的内容中心网络(SD-CCN)的内容请求时延,减少网络拥塞,快速应对网络中的节点或链路故障,借用软件定义网络(SDN)流量工程中的分段路由思想设计了软件定义的内容中心网络的分段路由策略(SD-CCN-SR)。通过控制器选取最优的缓存或内容源节点作为目的节点查找最优路径,向入口边界节点下发分段标签序列;将分段标签序列中的标签依次作为分段的目的节点进行最短路径转发,实现控制器通过少量控制信息对兴趣包上行链路的整体控制。仿真结果表明,本策略能够有效降低平均请求时延及平均路由跳数。

In order to reduce the delay of content request,reduce network congestion and deal with node or link failure quickly in software defined content centric network（ SD-CCN）,this paper designed a software defined content centric network＇s segment routing strategy（ SD-CCN-SR） based on the idea of segment routing in traffic engineering of SDN. The controller selected the optimal caching node or content source node as the destination node,found the optimal path,then sent the segment list（ SL） down to the ingress border node（ IBN）. This method used the labels in the segment list as segment destination nodes sequentially to carry out the shortest path routing,realized the integral control of interest packet＇s uplink by the controller through a small amount of control information. Simulation results show that this strategy can effectively reduce the average request delay and average routing hops.