Network Simulation of Low Earth Orbit Satellite Communication System Based on SNS3

On the basis of SNS3, by constructing an accurate satellite orbit model, physical layer link model and network protocol model, an antenna model suitable for LEO satellite communication system was proposed and designed, and a network simulation platform suitable for low-orbit satellite communication was built, which realized the comprehensive simulation of low-orbit satellite communication network. Solved the problem that SNS3 only supports the simulation of a single GEO satellite multipoint beam satellite network, but cannot simulate the LEO satellite communication system. In this paper, the key models were simulated and verified, and the simulation results showed that the effectiveness of the proposed model was valid. The simulation results showed that the model could effectively simulate the operation process of the LEO satellite communication network and evaluate the performance of different network parameters and protocols. It provided a reference for the construction of protocol system and the simulation and verification of key technologies of low-orbit satellite communication system.