A Strategy to Determine Whether to Use GPU for a Satellite Mission Scheduling Algorithm

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  • LEE Soojeon
    Satellite System Research Team, Electronics and Telecommunications Research Institute
  • LEE Byoung-Sun
    Satellite System Research Team, Electronics and Telecommunications Research Institute
  • KIM Jaehoon
    Satellite System Research Team, Electronics and Telecommunications Research Institute

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As the first Korean multi-mission geostationary satellite, Chollian was launched on June 27, 2010. Chollian is being successfully controlled using a satellite ground control system (SGCS) developed by ETRI. A mission planning subsystem (MPS) in SGCS gathers mission requests from users, performs complex mission scheduling, and generates a conflict-free mission schedule. In this paper, we provide an overview of the current mission scheduling algorithms of the Chollian satellite, select three representative constraint checking schemes among these algorithms, and implement new graphics processing unit (GPU)-based constraint checking schemes for the three representative schemes. We compare the performance of the GPU-based and CPU-based constraint checking schemes based on the size of the problem set and the time complexity of the problem. Finally, we suggest a strategy to determine whether or not to adopt GPU for a satellite mission scheduling algorithm.

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