SLSA: A Link Stability Based Algorithm for the Topology Optimization of IGSO/MEO Double-Layered Satellite Network

Abstract

With satellite networks playing an important role in many areas, how to design a satellite networktopology and interconnect with terrestrial networks has also attracted widespread attention. However,due to the high mobility of the satellite nodes and the limited number of connected antennas,it is challenging to effectively construct a fixed network topology with stable link quality during thesatellite operation period. In this paper, we propose a satellite link stability based algorithm (SLSA)for the topology optimization, which is based on link stability to generate Inclined GeosynchronousSatellite Orbit / Medium Earth Orbit (IGSO/MEO) double-layered satellite network (DLSN) topology.SLSA aims to build a stable topology with uninterrupted link connection and low transmissiondelay to reduce the extra transmission delay caused by frequent interruptions under the conditionof the limited number of satellite links. We compare SLSA with the shortest path based topologygeneration method, implement the simulation topology and conduct contrast experiments. The experimentalresults verify that SLSA has longer connection time and lower transmission delay thanthe traditional method.