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, 22:44 | Cite as

Cascade optimization design of inter-satellite link enhanced with adaptability in future GNSS satellite networks

  • Jinhui Huang
  • Wenxiang Liu
  • Yingxue Su
  • Feixue Wang
Original Article
  • 146 Downloads

Abstract

Inter-satellite communication and inter-satellite ranging are the foundation of autonomous navigation for satellite navigation systems. Due to cost limitations, it has been proposed in recent years to equip each satellite with one spot beam antenna, which points to different satellites according to a polling mechanism, resulting in an intermittently connected satellite network. This poses the problem of how to design the inter-satellite link (ISL) contact plan, which determines the evolution of network topology and has important effects on system performance. We propose a new framework for the ISL contact plan design in satellite navigation systems. Considering contact plan design as a multi-parameter and multi-objective optimization problem, the cascade optimization design (COD) is proposed as a method simple to implement and optimize the parameters of the contact plan. COD considers network load and geometry of satellites and has a good adaptability. In the proposed framework, both communication and measurement requirements are taken into account while the contact sequence and the slot length are optimized in two steps. Simulation results show that COD guarantees zero packet drops and achieves the least average delay with a selected network load. When the packet arrival rate is 0.45 packets/s, the packet drop ratio of COD is zero, while that of the traditional simulated annealing design (SAD) is 2.58%. The delay of COD is 22.97 s, which is only two-fifth of the SAD value of 58.77 s. At the same time, using COD the average autonomous navigation weighted dilution of precision decreases from 1.4408 to 0.9671. COD also has strong robustness and performance regardless of the onboard buffer size.

Keywords

Inter-satellite link GNSS Contact plan Cascade optimization 

Notes

Acknowledgment

This work is supported by the National Natural Science Foundation of China under Grant No. 41604016. Our special thanks to the colleagues of the Satellite Navigation R&D Center of National University of Defense Technology for the support, advices, and assistance. We very much appreciate the help and suggestions of two anonymous reviewers. Finally, we gratefully acknowledge the help from the Editor in Chief, Alfred Leick, who had the patience each time to help and participate in correction level in the whole process.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Electronic Science and EngineeringNational University of Defense TechnologyChangshaChina

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