Information Transmission Path Selection of Navigation Satellite Network Based on Directional Crosslink

Autonomous navigation using an intersatellite ranging and communication with intersatellite links (ISL) is the trend of satellite navigation system development. By controlling the direction of phased array antenna flexibly, the directional crosslink can achieve more information from other satellites. However, the efficiency of communication is affected at the same time. In this paper, we analyse the navigation satellite network assembled directional crosslink, and then we propose a solution to describe the progress of information transmission based on building directional graph. Then we present a method of finding Earliest Journey and Shortest Journey. According to simulation result, the method we present is practicable and we also achieve some valuable conclusions.