软件定义的内容中心网络的多域分段路由机制

Multi domain segment routing mechanism in software defined content centric network

为提高软件定义的内容中心网络(SD-CCN)分域多控制器架构中的路由传输效率,减轻控制器的负载压力,设计了软件定义的内容中心网络的多域分段路由机制(MDSR)。将基于内容名称的路由查找在控制平面执行,数据平面转换为基于节点标签的路由查找,上行链路经过的每个域的控制器选取最优路径并下发分段标签序列引导各自的域内路由,通过跨域节点对域标签的识别实现域间路由中继,从而以少量控制信息实现对上行链路的整体控制。仿真结果表明,本路由机制相比于随机转发等传统路由机制提高了缓存命中率,降低了平均请求时延及平均路由跳数。

In order to improve the routing efficiency and reduce the controllers’load pressure in multi domain multi-controller architecture of software defined content centric network(SD-CCN),this paper designed a multi domain segment routing mecha-nism(MDSR)in software defined content centric network.The schema carried out the routing lookup based on content name in control plane,and transformed into node label based routing lookup in data plane.The controllers for each domain on the uplink selected the optimal path and sent out segment lists to guide intra-domain routing,achieved inter domain routing relay through the identification of domain tag by cross domain nodes,so as to achieve the overall control of the uplink with a small amount of control information.Simulation results show that this routing mechanism can effectively improve the cache hit ratio,reduce the average request delay and average routing hops,compared with traditional routing mechanisms such as random forwarding.