弱全局信息下巨星座多路并发熵均衡路由策略  

Multi-Concurrent Entropy Balanced Routing Strategy for Giant Constellation under Weak Global Information

作　　者：吴云华[1] 初思仪 李宗凌 毛雨荷 岳程斐 WU Yunhua;CHU Siyi;LI Zongling;MAO Yuhe;YUE Chengfei(School of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China;Institute of Space and Applied Technology,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China)

机构地区：[1]南京航空航天大学航天学院,南京210016 [2]北京空间飞行器总体设计部,北京100094 [3]哈尔滨工业大学(深圳)空间科学与应用技术研究院,深圳518055

出　　处：《宇航学报》2024年第7期1089-1099,共11页Journal of Astronautics

摘　　要：为保障地面系统对巨星座信息的高效获取,考虑实际卫星感知能力的约束,提出一种弱全局信息下巨星座多路并发熵均衡路由策略。首先,根据星座运行模式构建簇群,同时考虑簇的感知能力,建立弱全局信息下的“星-星/星-地”数据传输模型。其次,综合考虑网络结构、数据流量分布和信息多点频发等因素,对现有算法进行改进,引入熵作为评估节点负载分布均匀度的量化指标,引入惩罚因子对路径成本进行动态调整,并通过滚动窗口法规划巨星座多路并发情况下的对地传输路径。最后,以Starlink一期部署的卫星为例,进行数值仿真,验证所提方法的有效性。In order to ensure the efficient acquisition of the giant constellation information by the ground system,considering the constraints of the actual satellite perception ability,a multi-channel concurrent entropy balanced routing strategy for the giant constellation under weak global information is proposed.Firstly,the cluster is constructed according to the constellation operation mode,and the"satellite-satellite/satellite-ground"data transmission model under weak global information is established considering the sensing ability of the cluster.Secondly,considering the factors such as network structure,data traffic distribution and information multi-point frequency,the existing algorithm is improved.The entropy is introduced as a quantitative index to evaluate the uniformity of node load distribution,and the penalty factor is introduced to dynamically adjust the path cost.The rolling window method is used to plan the ground transmission path in the case of multi-channel concurrency of the giant constellation.Finally,taking the satellites deployed in the first phase of the Starlink as an example,numerical simulation is carried out to verify the effectiveness of the proposed method.

关 键 词：巨星座 弱全局信息 数据获取 多路径 熵均衡 低轨卫星 

分 类 号：V412.4[航空宇航科学与技术—航空宇航推进理论与工程]