卫星数据传输全流程调度及优化算法

卫星数据传输过程包括两个环节:一是卫星到地面站的星地传输环节,二是地面站到数据中心的地面传输环节。卫星数据的传输问题即合理分配地面接收资源和数据传输链路资源,高效传输卫星数据。以在最短时间内获取卫星数据为目标,建立了包含星地传输和地面传输两个环节的全局调度优化模型,包括星地传输过程中的冲突消解模型和地面传输过程中数据传输模型。利用成像软件生成不同规模的调度任务,采用动态规划和遗传算法的混合算法求解。实验结果表明,与传统调度将两个环节分开优化相比,所提的全局优化能够明显缩短卫星数据传输总时间。

Satellite data transmission integrated scheduling and optimization

he process of satellite data transmission include two processes: data transmission from satellites to ground stations and data transmission from ground stations to the data center. The satellite data transmission problem indicates allocating reception and transmission resources of ground stations to obtain satellite data efficiently. This paper establishes an integrated satellite data transmission model with the objective of transmitting all satellite data in the shortest time, including a conflict resolution model of the first process and a data transmission model of the second process. Scheduling tasks are generated by imaging software, and the hybrid algorithm based on dynamic programming and the genetic algorithm is adopted in problem solving. The simulation results show that the proposed overall optimization shortens the total time cost of data transmission significantly compared to traditional separated optimization of the two processes.