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OA
Physical cell identity planning for access interference avoidance in large-scale LEO satellite networks
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.
LEO satellite communication networks,featuring wide coverage,low latency,and flexible deployment,have become an im-portant 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 se-vere access interference and lead to subsequent random access failure.To address this issue,a two-stage heuristic PCI-SSB joint plan-ning algorithm is proposed.Simulation results show that the proposed algorithm significantly reduces access interference over the base-line scheme and improves interference suppression capabilities in large-scale LEO satellite networks.
杨飞;张兴;王文博
北京邮电大学信息与通信工程学院,北京 100876北京邮电大学信息与通信工程学院,北京 100876北京邮电大学信息与通信工程学院,北京 100876
信息技术与安全科学
物理小区标识SSBLEO卫星网络启发式算法
physical cell identitySSBLEO satellite networkheuristic algorithm
《天地一体化信息网络》 2026 (2)
3-10,8
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