Inter-satellite links (ISLs) can be employed in global navigation satellite systems (GNSSs) for space-based telemetry, telecommand and ranging, which reduces the requirement for a large number of ground stations (GSs). However, the polling time division duplex (PTDD) ranging hierarchy of the ISLs raises the topology design problem of the networks. To optimize the communication performance with the constraint of ranging for precise orbit determination in GNSSs, we model the ISLs network with finite state automation (FSA) and solve the optimization problem with integer linear programming (ILP). With the proposed method, for the first time, optimal delay and throughput are both achieved for data transmission between satellites and GSs with guaranteed ranging performance. Simulation results corroborate that, compared with two existing methods, the proposed scheme largely improves the communication performance, i.e., the average delay and the network throughput by 46.9% and 11%, respectively.

中文翻译：

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基于整数线性规划的卫星间链路GNSS拓扑设计

卫星间链路（ISL）可以在全球导航卫星系统（GNSS）中使用，以进行天基遥测，遥控和测距，从而减少了对大量地面站（GS）的需求。但是，ISL的轮询时分双工（PTDD）测距层次结构提出了网络的拓扑设计问题。为了在GNSS精确确定轨道的范围内优化通信性能，我们使用有限状态自动化（FSA）对ISL网络进行建模，并使用整数线性规划（ILP）解决优化问题。利用所提出的方法，首次实现了卫星和GS之间数据传输的最佳时延和吞吐量，并保证了测距性能。仿真结果证实，与两种现有方法相比，