Multi-ground station system-based link allocation strategy for satellite constellation

Aiming at the research of large-scale satellite constellation, the research content of communication resources is put forward. With the successful construction of several low-orbit constellations, the commercialization of large-scale satellite constellations has begun. This kind of large-scale satellite constellation can simultaneously take into account the advantages of low delay, wide coverage and large traffic. In order to make efficient use of earth station resources, it has become the technical bottleneck of large-scale satellite constellation research. The multi-star and multi-station topology is proposed to better focus on this problem. Combined with the link time resources, a satellite-earth link time model is proposed. On this basis, the time-slot insertion strategy is proposed, and the multi-star and multi-station link schedules are obtained by taking the overall link efficiency of multi-ground stations as the optimization objective. The feasibility and superiority of the proposed strategy are verified by comparing the performance with random strategy and greedy strategy.