Research on the NB-IoT Random Access in LEO Satellite IoT

Haodong LIU; Zhong ZHENG; Wenjin WANG; Li YOU; Xiqi GAO

doi:10.11959/j.issn.2096-8930.2021041

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Research on the NB-IoT Random Access in LEO Satellite IoT

Special Issue: 6G-Oriented Space-Integrated-Ground Information Network | 更新时间：2024-06-05

- Research on the NB-IoT Random Access in LEO Satellite IoT
- Space-Integrated-Ground Information Networks Vol. 2, Issue 4, Pages: 34-42(2021)
- 作者机构：
  
  1. 东南大学信息科学与工程学院，江苏南京 211189
  2. 中国空间技术研究院，北京 100094
  3. 紫金山实验室，江苏南京 211111
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.2096-8930.2021041
  CLC： TP393
- Published Online：2021-12，
  
  Published：20 December 2021
- 稿件说明：
移动端阅览
Haodong LIU, Zhong ZHENG, Wenjin WANG, et al. Research on the NB-IoT Random Access in LEO Satellite IoT[J]. Space-integrated-ground information networks, 2021, 2(4): 34-42.
DOI：

Haodong LIU, Zhong ZHENG, Wenjin WANG, et al. Research on the NB-IoT Random Access in LEO Satellite IoT[J]. Space-integrated-ground information networks, 2021, 2(4): 34-42. DOI： 10.11959/j.issn.2096-8930.2021041.

摘要

窄带物联网技术被广泛应用于海量低速率和低功耗设备的数据通信，但其受制于地面网络的覆盖范围，无法为偏远地区提供服务。低轨卫星星座具有支持全球覆盖的特点，可以补充和扩展地面NB-IoT基础设施，这为天基物联网提供一种有效解决方案。面向天基物联网应用需求，在回顾NB-IoT系统体系架构的基础上，分析融合NB-IoT技术的低轨卫星物联网所面临的信道环境高动态时延和频偏等挑战。针对上行随机接入过程，设计有效的用户检测与定时同步方法，该方法具有高性能、低复杂度等优点，能有效解决融合NB-IoT的低轨卫星物联网中的高效随机接入问题。

Abstract

Narrowband internet of things (NB-IoT) technology is widely used in data communications for a large number of low-speed and low-power devices

but it is diff cult to provide services for remote areas that cannot be covered by terrestrial networks.With its global coverage and low cost

the LEO satellite constellation can supplement and expand the terrestrial NB-IoT infrastructure

providing an eff ective solution for the space-based internet of things.Facing the application requirements of space-based internet of things

on the basis of reviewing the NB-IoT system architecture

the challenges of channel environment high dynamic delay and frequency off set faced by the application of NB-IoT technology in the LEO satellite constellation scenario were analyzed.For the uplink random access process

an eff ective user detection and timing synchronization method was designed

which had the advantages of high performance and low complexity

and provided an eff cient receiving method for the LEO satellite NB-IoT uplink random access synchronization.

关键词

Keywords

references

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