FDSR:一种面向SD-MANET的快速转发规则下发方法

Accelerating Forwarding Rules Issuance with Fast-Deployed-Segment-Routing(FDSR)in SD-MANET

针对软件定义网络在移动自组织网络里部署传输路径时,需要控制器为路径上所有的节点下发相关流表项,从而造成传输开始需等待较长时间的问题,文中基于分段路由提出了一种快速下发数据转发规则的方法FDSR。控制器会以分段路由的方式,通过在数据包上添加转发路径对应标签的方式下发数据转发规则,并在处理最大堆栈深度问题时,利用标签粘连技术,将整条路径分为多个标签栈,通过算法选择后分别下发给能与控制器节点快速交互的转发节点,以减少路径配置时间。实验结果表明,相较于OpenFlow流表下发方式,FDSR在SD-MANET中能减少路径部署时长以及流表开销,并能有效应对SR的MSD问题,提升控制器部署长路径的速度。

Aiming at the problem that the deployment of transmission paths in MANET(mobile ad hoc network)for SDN(software defined network)requires the controller to issue related flow entries for all nodes on the path,thereby causing that the transmission have to wait for a long-term period,a mechanism for quickly issuing forwarding rules,FDSR(fast-deployed-segment-routing),is proposed.The controller will issue data forwarding rules by adding labels corresponding to the forwarding path on the data packets in the way of segmented routing,and when dealing with the max stack depth problem,use label adhesion technology to divide the entire path into multiple label stacks by algorithm,sending to corresponding forwarding nodes that can quickly inte-ract with the controller node to reduce path configuration time.Experiments show that compared with the OpenFlow distribution method,FDSR in SD-MANET(software defined mobile ad hoc network)can reduce path deployment time and flow table overhead,and can effectively deal with the MSD problem of SR and improve the long path deployment speed of the controller.