面向低轨卫星的NTN随机接入技术

宋艳军; 孙晨华; 谢文轩; 徐军; 张志丽; 张静

doi:10.11959/j.issn.2096-8930.2024035

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面向低轨卫星的NTN随机接入技术

专题：星地融合网络与传输技术 | 更新时间：2025-01-02

- 面向低轨卫星的NTN随机接入技术
- Random Access Technology of NTN Network for Low Orbit Satellite
- 天地一体化信息网络 2024年5卷第4期页码：17-24
- 作者机构：
  
  1.中国电子科技集团公司第五十四研究所，河北石家庄 050081
  2.电子科技大学，四川成都 611731
- 作者简介：
  
  [ "宋艳军（1983- ），男，中国电子科技集团公司第五十四研究所高级工程师，主要研究方向为低轨卫星通信、卫星有效载荷、低轨卫星随机接入。" ]
  孙晨华（1964- ），女，中国电子科技集团公司第五十四研究所教授级高级工程师，主要研究方向为卫星通信、天基网络协议、天基网络融合。
  谢文轩（2000- ），男，电子科技大学硕士生，主要研究方向为卫星移动通信、随机接入拥塞控制。
  徐军（1963- ），男，电子科技大学教授，主要研究方向为微波毫米波技术、毫米波通信技术、无线电物理等。
  张志丽（1985- ），女，中国电子科技集团公司第五十四研究所教授级高级工程师，主要研究方向为卫星移动通信、物理层协议。
  张静（1981- ），男，中国电子科技集团公司第五十四研究所高级工程师，主要研究方向为卫星通信、认知无线电、频谱感知。
- 基金信息：
- DOI：10.11959/j.issn.2096-8930.2024035
  中图分类号： TN393
- 收稿日期：2024-08-01，
  
  修回日期：2024-11-10，
  
  纸质出版日期：2024-12-20
- 稿件说明：
移动端阅览
宋艳军,孙晨华,谢文轩等.面向低轨卫星的NTN随机接入技术[J].天地一体化信息网络,2024,05(04):17-24.

SONG Yanjun,SUN Chenhua,XIE Wenxuan,et al.Random Access Technology of NTN Network for Low Orbit Satellite[J].Space-Integrated-Ground Information Networks,2024,05(04):17-24.
宋艳军,孙晨华,谢文轩等.面向低轨卫星的NTN随机接入技术[J].天地一体化信息网络,2024,05(04):17-24. DOI： 10.11959/j.issn.2096-8930.2024035.

SONG Yanjun,SUN Chenhua,XIE Wenxuan,et al.Random Access Technology of NTN Network for Low Orbit Satellite[J].Space-Integrated-Ground Information Networks,2024,05(04):17-24. DOI： 10.11959/j.issn.2096-8930.2024035.

摘要

通过比较非地面网络（NTN）通信与地面5G通信在通信场景、接入架构、终端类型、传输特性等方面的差异，总结出低轨卫星NTN的随机接入应重点研究，并深入分析NTN随机接入面临的问题和关键技术的突破情况。针对高动态信号的多普勒频偏问题，提出简单、易实现的卫星波束指向感知的频偏补偿方法；面对低轨卫星接入波束控制难题，提出一种多点波束分区域覆盖的实时调度方法；同时为解决低轨NTN场景下的随机接入拥塞问题，提出利用强化学习方法设计接入类别禁止因子的新思路。

Abstract

By comparing the differences between NTN communication and ground-based 5G communication

this paper concluded that the random access of low-orbit satellite NTN should be studied. The problems and key technologies of NTN random access were deeply analyzed. A simple and easy to implement frequency offset compensation method for satellite beam-pointing sensing was proposed to solve the Doppler frequency offset problem of high dynamic signals. A real-time scheduling method of multi-point beam sub-region coverage was proposed to solve the problem of beam control for low orbit satellite access. A new idea of using reinforcement learning method to design access class barring factors was proposed to solve the random access congestion problem in low orbit NTN scenario.

关键词

Keywords

references

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