Research and standardization progress on GNSS resilience enhancement in NTN

Tang Zhihua; Zhang Fang; Jiao Lingxiao; Yan Hong; Xu Xiaofan; Tong Jianfei; Sun Yi

doi:10.11959/j.issn.1000-0801.DXKX250747

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Research and standardization progress on GNSS resilience enhancement in NTN

Review | 更新时间：2026-05-13

- Research and standardization progress on GNSS resilience enhancement in NTN
- Telecommunications Science Vol. 42, Issue 4, Pages: 15-30(2026)
- 作者机构：
  
  1.上海卫星互联网研究院有限公司，上海 200120
  2.上海市卫星互联网重点实验室，上海 200120
  3.卫星互联网全国重点实验室，上海 200120
- 作者简介：
- 基金信息：
  
  Shanghai 2024 Science and Technology Innovation Action Plan: Rising-Star Program (Sailing Special Project)(24YF2743100)
- DOI：10.11959/j.issn.1000-0801.DXKX250747
  CLC： TP393
- Received：25 December 2025，
  
  Revised：2026-02-05，
  
  Accepted：27 February 2026，
  
  Published：20 April 2026
- 稿件说明：
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唐志华,张芳,焦凌霄等.GNSS韧性增强在NTN中的研究与标准化进展[J].电信科学,2026,42(04):15-30.

Tang Zhihua,Zhang Fang,Jiao Lingxiao,et al.Research and standardization progress on GNSS resilience enhancement in NTN[J].Telecommunications Science,2026,42(04):15-30.
唐志华,张芳,焦凌霄等.GNSS韧性增强在NTN中的研究与标准化进展[J].电信科学,2026,42(04):15-30. DOI： 10.11959/j.issn.1000-0801.DXKX250747.

Tang Zhihua,Zhang Fang,Jiao Lingxiao,et al.Research and standardization progress on GNSS resilience enhancement in NTN[J].Telecommunications Science,2026,42(04):15-30. DOI： 10.11959/j.issn.1000-0801.DXKX250747.

摘要

第三代合作伙伴计划（3rd Generation Partnership Project，3GPP）非地面网络（non-terrestrial network，NTN）通过对5G 新空口（new radio，NR）协议进行增强设计以适应卫星通信场景，有效融合地面与非地面网络优势，具备持续演进能力，是构建天地一体化网络的重要技术路径。针对现有NR NTN系统因依赖全球导航卫星系统（global navigation satellite system，GNSS）而面临的网络韧性不足问题，NR NTN工作组已在Release 20开展系统性的研究工作。基于此，首先概述了NTN GNSS韧性增强的关键技术挑战，进而系统梳理并分析了初始接入流程优化、连接态时频同步增强、网络辅助定位等关键方案的标准化进展，最后对未来技术演进与系统部署方向作出展望。

Abstract

By enhancing the terrestrial 5G new radio (NR) protocol to adapt to satellite communication scenarios

the 3rd Generation Partnership Project (3GPP) non-terrestrial networks (NTN) can fully integrate the advantages of terrestrial and non-terrestrial networks while with continuous evolution capability

which is therefore an essential technological direction to realize the integration of satellite and terrestrial network. To address the insufficient network resilience caused by the dependency on GNSS in existing NR NTN systems

a study item has been conducted as part of the Release 20 NR NTN standardization work. Based on this

the key technical challenges in enhancing GNSS resilience for NTN were firstly outlined. Then

the technical solutions and standardization progress involved in initial access procedure optimization

time and frequency synchronization enhancement in connected status

and network-assisted positioning were comprehensively introduced and analyzed. Furthermore

future technology evolution and system deployment were prospected.

关键词

Keywords

references

Lin X Q , Lin Z P , Löwenmark S E , et al . Doppler shift estimation in 5G new radio non-terrestrial networks [C ] // Proceedings of the 2021 IEEE Global Communications Conference (GLOBECOM) . Piscataway : IEEE Press , 2021 : 1 - 6 .

Zhu J F , Sun Y H , Peng M G . Timing advance estimation in low earth orbit satellite networks [J ] . IEEE Transactions on Vehicular Technology , 2024 , 73 ( 3 ): 4366 - 4382 .

Torrieri D J . Statistical theory of passive location systems [J ] . IEEE Transactions on Aerospace and Electronic Systems , 1984 , AES-20( 2 ): 183 - 198 .

Neinavaie M , Shadram Z , Kozhaya S , et al . First results of differential Doppler positioning with unknown Starlink satellite signals [C ] // Proceedings of the 2022 IEEE Aerospace Conference (AERO) . Piscataway : IEEE Press , 2022 : 1 - 14 .

Kassas Z M , Kozhaya S , Kanj H , et al . Navigation with multi-constellation LEO satellite signals of opportunity: Starlink, OneWeb, Orbcomm, and Iridium [C ] // Proceedings of the 2023 IEEE/ION Position, Location and Navigation Symposium (PLANS) . Piscataway : IEEE Press , 2023 : 338 - 343 .

Peral-Rosado J A , Raulefs R , López-Salcedo J A , et al . Survey of cellular mobile radio localization methods: from 1G to 5G [J ] . IEEE Communications Surveys & Tutorials , 2018 , 20 ( 2 ): 1124 - 1148 .

Garcia N , Wymeersch H , Larsson E G , et al . Direct localization for massive MIMO [J ] . IEEE Transactions on Signal Processing , 2017 , 65 ( 10 ): 2475 - 2487 .

Kang J , N P E , Lee J , et al . Fundamental performance bounds for carrier phase positioning in LEO-PNT systems [C ] // Proceedings of the 2024 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) . Piscataway : IEEE Press , 2024 : 13496 - 13500 .

Shi J S , Yeh B H , Wu J M , et al . Federated Kalman filter-based fusion of LEO and GNSS positioning [C ] // Proceedings of the 2024 IEEE 99th Vehicular Technology Conference (VTC2024-Spring) . Piscataway : IEEE Press , 2024 : 1 - 5 .

Emenonye D R , Dhillon H S , Buehrer R M . Fundamentals of LEO-based localization [J ] . IEEE Transactions on Information Theory , 2025 , 71 ( 7 ): 5277 - 5311 .

Neinavaie M , Khalife J , Kassas Z M . Exploiting Starlink signals for navigation: first results [C ] // Proceedings of the 34th International Technical Meeting of the Satellite Division of the Institute of Navigation (ION GNSS+ 2021) . Saint Louis : Institute of Navigation , 2021 : 2766 - 2773 .

Neinavaie M , Khalife J , Kassas Z M . Acquisition, Doppler tracking, and positioning with Starlink LEO satellites: first results [J ] . IEEE Transactions on Aerospace and Electronic Systems , 2022 , 58 ( 3 ): 2606 - 2610 .

3GPP RP-251863: 2025 Study on GNSS resilient NR-NTN operation [S ] .

3GPP R1-2111127: 2021 FL Summary #4 on enhancements on UL time and frequency synchronization for NR NTN [S ] .

3GPP R1-2506785: 2025 On NR-NTN GNSS resilience [S ] .

3GPP R1-2507719: 2025 NR-NTN GNSS resilience [S ] .

Shinakov Y S . Ambiguity functions of Zadoff-Chu signals for 5-G synchronization systems [C ] // Proceedings of the 2018 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO) . Piscataway : IEEE Press , 2018 : 1 - 7 .

3GPP R1-2506987: 2025 Discussion on NR-NTN GNSS resilience [S ] .

3GPP R1-2507251: 2025 Discussion on NR-NTN GNSS resilience [S ] .

3GPP R1-2507850: 2025 Discussion on GNSS resilience for NR-NTN [S ] .

3GPP R1-2507117: 2025 Discussion on NR-NTN GNSS resilience [S ] .

3GPP R1-2506941: 2025 GNSS resilience for NR-NTN [S ] .

3GPP R1-2507012: 2025 Discussion on NR-NTN GNSS resilience [S ] .

3GPP R1-2507761: 2025 Discussion on Rel-20 GNSS resilient NR NTN operation [S ] .

3GPP R1-2506896: 2025 Discussion on NR-NTN GNSS resilience [S ] .

3GPP R1-2507174: 2025 Discussion on NR-NTN GNSS resilience [S ] .

More H , Cianca E , De Sanctis M . Comparing positioning performance of LEO mega-constellations and GNSS in urban canyons [J ] . IEEE Access , 2024 , 12 : 24465 - 24482 .

Reid T G R , Walter T , Enge P K , et al . Navigation from low earth orbit-Part 1: concept, current capability, and future promise [M ] //Morton Y J, van Diggelen F, Spilker J J, et al. Position, navigation, and timing technologies in the 21st Centur y: integrated satellite navigation, sensor systems, and civil applications, Volume 2 . Piscataway: Wiley-IEEE Press , 2020: 1359 - 1379 .

Skolnik M I . Introduction to radar systems [M ] . New York : McGraw-Hill , 1980 .

Keating R , Saily M , Hulkkonen J , et al . Overview of positioning in 5G new radio [C ] // Proceedings of the 2019 16th International Symposium on Wireless Communication Systems (ISWCS) . Piscataway : IEEE Press , 2019 : 320 - 324 .

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