Research and standardization progress on GNSS resilience enhancement in NTN networks

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

doi:10.11959/j.issn.1000-0801.2026112

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Research and standardization progress on GNSS resilience enhancement in NTN networks

Review | 更新时间：2026-03-31

- Research and standardization progress on GNSS resilience enhancement in NTN networks
- Telecommunications Science Vol. 42, Pages: 1-16(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.1000-0801.2026112
  CLC： TP393
- Received：25 December 2025，
  
  Revised：2026-02-05，
  
  Accepted：27 February 2026，
  
  Online First：30 March 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网络中的研究与标准化进展[J].电信科学,

Tang Zhihua,Zhang Fang,Jiao Lingxiao,et al.Research and standardization progress on GNSS resilience enhancement in NTN networks[J].Telecommunications Science,
唐志华,张芳,焦凌霄等.GNSS韧性增强在NTN网络中的研究与标准化进展[J].电信科学, DOI：10.11959/j.issn.1000−0801.2026112 .

Tang Zhihua,Zhang Fang,Jiao Lingxiao,et al.Research and standardization progress on GNSS resilience enhancement in NTN networks[J].Telecommunications Science, DOI：10.11959/j.issn.1000−0801.2026112 .

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 first 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

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