大规模低轨卫星网络中基于物理小区标识规划的接入干扰规避

杨飞; 张兴; 王文博

doi:10.11959/j.issn.2096-8930.2026001

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大规模低轨卫星网络中基于物理小区标识规划的接入干扰规避

天地融合智能组网理论与关键技术 | 更新时间：2026-07-07

- 大规模低轨卫星网络中基于物理小区标识规划的接入干扰规避
- Physical cell identity planning for access interference avoidance in large-scale LEO satellite networks
- 天地一体化信息网络 2026年7卷第2期页码：3-10
- 作者机构：
  
  北京邮电大学信息与通信工程学院，北京 100876
- 作者简介：
  
  杨飞（2001- ），男，北京邮电大学信息与通信工程学院硕士生，主要研究方向为卫星互联网。
  张兴（1980- ），男，北京邮电大学信息与通信工程学院教授、博士生导师，主要研究方向为5G/6G移动通信系统、移动边缘计算与数据分析、卫星互联网。
  王文博（1965- ），男，北京邮电大学副校长，主要研究方向为无线传输技术、无线网络理论、无线信号处理。
- 基金信息：
- DOI：10.11959/j.issn.2096-8930.2026001
  中图分类号： TP393
- 收稿：2026-02-15，
  
  修回：2026-04-13，
  
  纸质出版：2026-06-20
- 稿件说明：
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杨飞,张兴,王文博.大规模低轨卫星网络中基于物理小区标识规划的接入干扰规避[J].天地一体化信息网络,2026,07(02):3-10.

Yang Fei,Zhang Xing,Wang Wenbo.Physical cell identity planning for access interference avoidance in large-scale LEO satellite networks[J].Space-Integrated-Ground Information Networks,2026,07(02):3-10.
杨飞,张兴,王文博.大规模低轨卫星网络中基于物理小区标识规划的接入干扰规避[J].天地一体化信息网络,2026,07(02):3-10. DOI： 10.11959/j.issn.2096-8930.2026001.

Yang Fei,Zhang Xing,Wang Wenbo.Physical cell identity planning for access interference avoidance in large-scale LEO satellite networks[J].Space-Integrated-Ground Information Networks,2026,07(02):3-10. DOI： 10.11959/j.issn.2096-8930.2026001.

摘要

低轨卫星通信网络因其覆盖范围广、时延低、部署灵活等优势，成为天地一体化信息系统的重要组成部分。然而，大规模低轨卫星星座在进行随机接入的下行同步过程中，同频波束间的物理小区标识（physical cell identity

PCI）模3、模4、模30冲突，会引发严重的接入干扰，导致后续随机接入失败。为此，提出一种两阶段启发式PCI-同步信号块（Synchronization signal block

SSB）的联合规划算法。仿真结果表明，所提算法相较基线方案接入干扰显著降低，大规模低轨卫星网络下的干扰抑制能力有效提高。

Abstract

LEO satellite communication networks

featuring wide coverage

low latency

and flexible deployment

have become an important part of integrated space-terrestrial communication system. However

during the downlink synchronization process for random access in large-scale LEO constellations

PCI modulo-3

modulo-4

and modulo-30 collisions among co-frequency beams may cause severe access interference and lead to subsequent random access failure. To address this issue

a two-stage heuristic PCI–SSB joint planning algorithm is proposed. Simulation results show that the proposed algorithm significantly reduces access interference over the baseline scheme and improves interference suppression capabilities in large-scale LEO satellite networks.

关键词

Keywords

references

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