A Beidou Laser Link Allocation Scheme Based on Network Throughput Optimization

Abstract

The Beidou-3 navigation system has carried out the experimental scheme design of laser intersatellite link [1], and according to the characteristics of laser intersatellite link, the conception of spatial backbone network is put forward. Taking this backbone network as the breakthrough point, this paper analyzes the network throughput of Beidou-3 inter-satellite link, and points out that the main bottleneck restricting the network performance lies in the transmission capacity of the inter-satellite link. To solve the problem of topology optimization of high-speed inter-satellite link network, aiming at matching the network throughput between the satellite-ground link and the inter-satellite transmission link, a Beidou laser link allocation scheme based on network throughput optimization is proposed, and the link allocation is realized by searching through a Dijkastra algorithm based on the longest visibility. Simulation results show that the link allocation scheme based on this algorithm can match the data throughput between satellite-ground link and inter-satellite link, solve the bottleneck problem of satellite-ground transmission and improve the network throughput.