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

更新时间：2026-03-16

- 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年页码：1-11
- 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。
- 基金信息：
- DOI：10.11959/j.issn.2096-8930.2026001
  中图分类号： TP393
- 网络首发：2026-03-16，
- 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,

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,
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, DOI：.

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, DOI：.

摘要

低轨卫星通信网络以其覆盖范围广、时延低、部署灵活等优势，成为天地一体化通信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PCI模3、模4、模30的碰撞，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-SSB的联合规划算法。仿真结果表明，所提算法相较基线方案显著降低接入干扰，提高大规模低轨卫星网络下的干扰抑制能力。

Abstract

LEO satellite communication networks

featuring wide coverage

low latency

and flexible deployment

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

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

PCI modulo-3

modulo-4

and modulo-30 collisions among co-channel beams may cause severe access interference and lead to 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 and improves interference mitigation in large-scale LEO satellite networks.

关键词

Keywords

references

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