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针对未来数据中继卫星系统中微波与激光链路并存的发展趋势,研究了微波/光混合链路的中继卫星系统资源调度问题。分析了混合链路在传输速率、链路建立及终端功耗等方面的特点,以多时间窗口、多种类型天线以及任务优先级为参量,以未调度任务总权重、终端总功耗及调度完成时间为目标,建立多目标约束规划模型;提出基于模型分解的优化求解算法,将模型分解为任务调度子问题和优化求解子问题,任务调度子问题通过基于时间窗口更新的调度方法获得初始调度方案,优化求解子问题利用遗传算法对方案进行优化,获得最优调度结果;仿真结果中任务完成率为93.75%,调度任务的权值之和占总权值的96.96%。结果验证了该方法在描述求解具有多任务、多类型天线的微波/光混合链路中继卫星系统资源调度中的有效性。
Aiming at the coexistence of microwave and laser link in future data relay satellite system, the resource scheduling problem of relay satellite system in microwave / optical hybrid link is studied. The characteristics of hybrid links in terms of transmission rate, link establishment and terminal power consumption are analyzed. Taking multiple time windows, multiple types of antennas and task priority as parameters, the unscheduled task total weight, total terminal power consumption and scheduling The completion time as the goal, the establishment of multi-objective constrained programming model; proposed optimization algorithm based on model decomposition algorithm, the model is decomposed into sub-problems of task scheduling and optimization of sub-problems, task scheduling sub-problems through scheduling based on the time window to update the initial scheduling In the simulation results, the completion rate of the task is 93.75%, and the sum of the weight of the scheduling task accounts for 96.96% of the total weight. The results show that this method is effective in describing the resource scheduling of microwave / optical hybrid link relay satellite systems with multi-tasking and multi-type antennas.