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 network
topology 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 the
satellite 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 Geosynchronous
Satellite 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 transmission
delay to reduce the extra transmission delay caused by frequent interruptions under the condition
of the limited number of satellite links. We compare SLSA with the shortest path based topology
generation method, implement the simulation topology and conduct contrast experiments. The experimental
results verify that SLSA has longer connection time and lower transmission delay than
the traditional method.