面向卫星互联网的动态仿真技术研究

Research on Dynamic Simulation Technology for Satellite Internet

网络仿真是卫星互联网在滚动建设过程中新技术验证与安全技术评估的重要支撑。针对卫星互联网高度时变特点,设计了基于云平台的动态仿真体系架构。基于该架构,针对卫星链路参数的时变问题,提出卫星链路分布式仿真算法,提升了链路动态仿真的同步精度;针对卫星运动过程中的拓扑时变问题,提出基于时间片的实时拓扑仿真算法,实现了仿真拓扑的实时准确变化;针对人在回路操作导致的拓扑变化问题,提出卫星链路动态仿真控制技术,实现了仿真拓扑的实时重构。实验表明:相对于传统方法,链路动态仿真同步精度提升了96%;对卫星断链导致的拓扑变化场景,可以实现拓扑的实时准确变化;对人在回路操作导致的拓扑变化场景,能完成仿真拓扑的实时重构。

Network simulation is an important support for new technology verification and security technology evaluation in the rolling construction of satellite internet.A dynamic simulation architecture which based on cloud platform is proposed to address the highly time-varying characteristics of satellite internet.An algorithm of distributed simulation technology of satellite links,which improves the synchronization of accuracy of dynamic simulation of links,is designed to tackle the time-varying of satellite links.Aiming at the topology changes in the process of satellites motion,an algorithm of realtime topology simulation based on time splice is raised,which realizes real-time and accurate changes of simulation topology.In order to reconstruct simulation topology in time,a dynamic simulation technology of satellite links is put forward which can simulate unexpected topology caused by Human in loop operation.Experimental data show that compared with the traditional method,the proposed method improves the synchronization accuracy of link dynamic simulation about 96%.The topology change scene caused by satellites motion can be simulated in real time and accurately.For the topology change scene caused by Human in loop operation,it can complete the real-time reconstruction of the topology.