一种基于SDN技术的星载交换系统组网架构

为了解决目前星载交换系统中路由交换技术的协议开销大、信令复杂、服务质量(QoS)保障能力弱等问题,提出一种基于软件定义网络(SDN)技术的星载交换系统组网架构,对卫星通信SDN控制器和星载SDN交换机的系统结构和功能模块进行了初步设计,实现了星载交换系统控制平面与转发平面的分离,为进一步开展相关研究打下了基础。通过实验仿真,分析比较了SDN星载交换系统和传统星载交换系统的系统负荷和路由收敛时间。结果表明,SDN星载交换系统在降低星载计算能力需求和有效提高拓扑结构稳定性上具有明显优势,可以有效减少传统星载交换系统的有效负荷,优化卫星信道资源利用率,提高卫星通信网络的QoS保障能力。

A framework of SDN-based satellite on-board switching networks

To solve such problems the as protocol overhead, signaling complex and weak quality of service(QoS) support capability in on-board switching system, a framework of SDN-based satellite on-board switching networks was proposed, the function blocks of satellite communication SDN controller and satellite on-board SDN switch was preliminarily designed,the separation of the control plane and the forwarding plane in on-board switching networks achieved, and the foundation for further research was laid. Through the experiment simulation, the system load and the route convergence time between the SDN-based satellite on-board switching system and the traditional satellite on-board switching system were analyzed and compared. The simulation results show that SDN-based on-board switching networks has obvious advantages in reducing the satellite on-board computing capability requirement and improving the topological stability, which can reduce the effective load of satellite on-board switching system, optimize the utilization of satellite resources, and improve the QoS support capability of satellite network.