摘要
为实现低轨遥感、通信星座全球态势监测与时敏数据快速回传,考虑低轨多层异构星座约束条件,提出一种面向低轨多层异构星座的低时延拓扑路由联合优化算法(LLTRA)。首先,利用星座运行的可预测性,通过虚拟拓扑的方式将星座变化离散化,实现静态拓扑下的路由计算。然后,基于业务驱动,提出了异构星座跨层链路的最优时间匹配算法,实现跨层星间链路的建立。最后,考虑链路拥塞,设计路径规避策略,完成路由规划,有效实现了卫星网络的时敏数据快速回传。仿真表明:LLTRA算法相较于基线算法以及经典数据回传算法,能够有效提高跨层链路可用率,并大幅减少路由跳数和降低通信时延。
To enable global monitoring and rapid transmission of time-sensitive data for low Earth orbit(LEO)remote sensing and communication constellations,constrained by multi-layer heterogeneous LEO constellation characteristics,the low-latency topological routing joint optimization algorithm(LLTRA)is proposed.First,the predictability of constellation operations is leveraged to discretize topology changes through virtual topology modeling,enabling routing computations under static topological conditions.Second,service-driven requirements are addressed by developing an optimal time-matching algorithm for cross-layer links in heterogeneous constellations,facilitating the establishment of inter-satellite links(ISLs)between layers.Third,considering link congestion,a path avoidance strategy is designed,and route planning is finalized,achieving efficient backhaul of time-sensitive data in satellite networks.Simulation results indicate that,compared to baseline and traditional data backhaul algorithms,LLTRA enhances inter-layer link availability and significantly reduces routing hop counts and communication latency.
作者
赵艳春
林宝军
田丰
赵帅
杨子健
ZHAO Yanchun;LIN Baojun;TIAN Feng;ZHAO Shuai;YANG Zijian(Innovation Academy for Microsatellites,Chinese Academy of Sciences,Shanghai 201203,China;University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Engineering Center for Microsatellites,Shanghai 201203,China;School of Information Science and Technology,ShanghaiTech University,Shanghai 201210,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China;Key Laboratory for Satellite Digitalization Technology,Chinese Academy of Sciences,Shanghai 201210,China)
出处
《宇航学报》
北大核心
2025年第10期2160-2171,共12页
Journal of Astronautics
基金
中国科学院青年创新促进会资助项目(Y1ZKRCMT01)。
关键词
低轨卫星网络
异构星座
路由算法
星间链路
动态组网
LEO satellite network
Heterogeneous constellation
Routing algorithm
Inter-satellite link
Dynamic networking
