关键词: 卫星互联网, 星链, 低轨卫星星座, 网络仿真, 动态仿真

Abstract:

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 real-time 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.

Key words: satellite internet, Starlink, low earth orbit constellation, network simulation, dynamic simulation