Chinese Space Science and Technology ›› 2023, Vol. 43 ›› Issue (5): 65-70.doi: 10.16708/j.cnki.1000-758X.2023.0069

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DRL-based link planning algorithm for mega constellation satellite and TT&C

XI Chao1,YANG Bo1,WANG Jirong1,LI Gong2,ZHU Ruijie2,YANG Xiao1   

  1. 1 Satellite Communications Business Division,Space Star Technology Co.,Ltd.,Xi′an 710000,China
    2 Zhengzhou University,Zhengzhou 450001,China
  • Published:2023-10-25 Online:2023-09-12

Abstract: Aiming at the planning of satellite and TT&C links in mega constellations,an intelligent planning and scheduling algorithm based on deep reinforcement learning was proposed.The resource competition and connection relationship between satellite and TT&C station were considered,the environment state was designed,and the allocation scheme of satellite to TT&C station was generated by sensing the satellite state and combining the action selection strategy.Iterative optimization of the strategy was performed according to the feedback reward value.The proposed algorithm was applied to the satellite and TT&C link planning task of the mega constellation system.The simulation results show that the proposed intelligent algorithm can improve the antenna utilization rate of TT&C station to more than 98%,and can effectively reduce the frequency of antenna switching.The trained model can quickly generate the satellite and TT&C link planning scheme within 30s according to the satellitebased visual window at the future time.

Key words:  , mega constellations, satellite and TT&, C links, deep reinforcement learning, antenna utilization, switching times