Research on the Coverage Solution of the Dual-Carrier Network at 3.5 GHz in Low Altitude Areas

WEI Mingshuo; XIE weiliang

doi:10.11959/j.issn.1000-0801.DXKX250080

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Research on the Coverage Solution of the Dual-Carrier Network at 3.5 GHz in Low Altitude Areas

更新时间：2026-01-21

- Research on the Coverage Solution of the Dual-Carrier Network at 3.5 GHz in Low Altitude Areas
- Telecommunications Science Pages: 1-13(2026)
- 作者机构：
  
  中国电信研究院，北京 102209
- 作者简介：
- 基金信息：
  
  Research and Verification of Key Technologies for Integrated Communication and Sensing Networking in 5G-Advanced under the National Science and Technology Major Project of Mobile Information Networks(2024ZD1300200)
- DOI：10.11959/j.issn.1000-0801.DXKX250080
  CLC： TN929.5
- Received：20 February 2025，
  
  Revised：2025-02-26，
  
  Accepted：03 March 2025，
  
  Online First：08 January 2026，
- 稿件说明：
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魏明烁,谢伟良.低空3.5GHz双载波网络覆盖解决方案研究[J].电信科学,

WEI Mingshuo,XIE weiliang.Research on the Coverage Solution of the Dual-Carrier Network at 3.5 GHz in Low Altitude Areas[J].Telecommunications Science,
魏明烁,谢伟良.低空3.5GHz双载波网络覆盖解决方案研究[J].电信科学, DOI：10.11959/j.issn.1000−0801.DXKX250080.

WEI Mingshuo,XIE weiliang.Research on the Coverage Solution of the Dual-Carrier Network at 3.5 GHz in Low Altitude Areas[J].Telecommunications Science, DOI：10.11959/j.issn.1000−0801.DXKX250080.

摘要

低空经济作为一种新兴的综合经济形态，引起了广泛关注。该领域在现代社会中展现出巨大的发展潜力和战略价值。然而，低空经济的发展同样面临着诸多挑战。目前，地面网络对低空的覆盖主要依赖于波束的上旁瓣，这种覆盖方式难以满足低空立体、广域覆盖的需求。鉴于此，迫切需要对低空网络的覆盖质量进行提升。在低空经济活动中，无人机作为一种典型的应用工具，其低空业务的执行不可避免地涉及到垂直起飞和降落过程。在此过程中，确保无人机能够实现网络的平滑切换和稳定接入，成为了一个关键的研究议题。利用3.5GHz频段覆盖低空，提出双载波空地异频和双载波空地同频两种方案，并探讨在无人机垂直起降过程中如何部署以保障其网络接入的稳定性与切换的平滑性。通过现场测试对所提方案进行了验证与分析，两种方案均可以提升低空覆盖的性能，同时针对无人机垂直起降提出了网络部署建议。

Abstract

Low - altitude economy

as an emerging comprehensive economic form

was widely concerned. Great development potential and strategic value were demonstrated by this field in modern society. However

the development of low - altitude economy was also faced with numerous challenges. At present

the coverage of low - altitude area by the ground network mainly relied on the upper sidelobes of the beam

and this coverage method was difficult to meet the requirements of three - dimensional and wide - area coverage of low - altitude area. In view of this

it was urgent to improve the coverage quality of the low - altitude network. In low - altitude economic activities

as a typical application tool

the execution of low - altitude operations by unmanned aerial vehicles (UAVs) inevitably involved the vertical take - off and landing processes. During this process

ensuring that UAVs could achieve smooth network handover and stable access became a key research topic. In this study

the 3.5GHz frequency band was utilized to cover the low - altitude area

and two schemes

namely dual - carrier air - ground different - frequency and dual - carrier air - ground same - frequency

were proposed. Also

how to deploy during the vertical take - off and landing of UAVs to ensure the stability of network access and the smoothness of handover was explored. In this paper

the proposed schemes were verified and analyzed through field tests. Both schemes could improve the performance of low - altitude coverage. At the same time

network deployment suggestions were put forward for the vertical take - off and landing of UAVs.

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references

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