A Real-Time Scheduling Method for Emergency Tasks in Satellite-Ground System

The rapid progress in satellite technology has led to an escalating demand for a wide range of diverse and complex satellite tasks. The increasing number of satellites and the complexity of tasks have made the efficient utilization of ground station resources indispensable. Hence, this study presents a novel dynamic scheduling method that holistically considers both routine tasks and emergency tasks, with the objective of optimizing the utilization of ground station resources. In the case of emergency tasks, the real-time scheduling approach employs a direct insertion preemptive scheduling strategy. Regarding routine tasks, the scheduling methods encompass indirect insertion scheduling and rescheduling techniques. Simulation experiments have substantiated that the proposed real-time scheduling algorithm effectively solves the scheduling challenges associated with emergency tasks. The results demonstrate a high task completion rate while minimizing the impact on routine tasks. Experimental findings substantiate the algorithm's effectiveness in optimizing ground station resource allocation, leading to improved overall operational efficiency.