Dynamic optimization of laser inter-satellite link network topology based on genetic algorithm

Abstract

This paper studies the network topology dynamic problem of the laser inter-satellite link in the navigation constellation. Since the reestablishment time of the laser inter-satellite link is relatively long, this paper envisages that multiple laser intersatellite links reestablish links at the same time when the network topology changes. Therefore, it is necessary to maintain certain performance during the change. The inter-satellite link of the navigation constellation needs to balance the communication and the inter-satellite orbit determination performance. This paper proposes the link transmission cost based on the inter-satellite link distance and the amount of data transmitted on the link to measure the communication performance of the inter-satellite link, and the position dilution of precision to measure the performance of the orbit determination. In this paper, a multi-objective optimization model is established, aiming to improve the performance of the communication and inter-satellite orbit determination. The model used genetic algorithm to solve the problem. The simulation results have shown that the inter-satellite link network topology witnessed an obvious improvement in both the communication performance and the orbit determination performance, and has good communication performance when network changes.