摘要： 在传统控制器静态部署策略中,控制器和交换机的映射关系是静态的,导致其无法适应卫星高动态的拓扑和网络流量变化。为此,提出一种基于软件定义网络的空间信息网络多控制器动态部署策略。充分考虑拓扑的周期性变化与流量的突发性,针对控制器负载过载和欠载2个临界状态,提出一种基于双门限的交换机动态迁移方法,以解决过载时控制器失效与欠载时资源浪费问题。仿真结果表明,与多控制器静态部署策略相比,该策略能够提升系统吞吐量,降低系统响应时延,提高网络整体性能,保证控制器间的负载均衡。

关键词: 软件定义网络, 空间信息网络, 控制器部署, 交换机迁移, 负载均衡

Abstract: In the traditional controller static deployment strategy,the mapping relationship between the controller and the switch is static,causing it to be unable to adapt to the high dynamic topology and network traffic change of the satellite.To solve this problem,a multi-controller dynamic deployment strategy based on Software Defined Network(SDN) is proposed.Considering the periodic changes of topology and the burst of flow,a two threshold switch dynamic transfer method is proposed for the 2 critical states of load overload and under load,which solves the problem of controller failure during the overloading as well as the waste of resources when under load.Simulation results show that,compared with the multi-controller static deployment strategy,the proposed strategy can improve the system throughput,reduce the system response delay,improve the overall network performance and ensure the load balance between the controllers.

Key words: Software Defined Network(SDN), spatial information network, controller deployment, switch migration, load balance

中图分类号: 

• TP391