摘要
卫星网络凭借广域覆盖、灵活组网、不受地面环境限制等优势,已成为6G研究的热点方向之一。与传统地面网络不同,卫星的高速运动导致星间的建立与维护面临诸多挑战。日凌现象、电离层闪烁及雨雪天气等复杂环境也会降低星间链路可靠性。与此同时,以激光为代表的高速星间链路技术目前仍处起步阶段,成熟度仍有待提高。这些因素都可能导致星间链路的故障,进而影响卫星网络的整体性能。因此,亟需探究星间链路故障对卫星网络可靠性的影响。分析了卫星网络规模对网络可靠性的影响,给出不同网络规模下星间链路故障率建议低于的阈值边界。讨论了卫星网络拓扑构型对网络可靠性的影响,给出网络连通性以及平均跳数随拓扑结构的变化关系。研究了多路径传输对网络可靠性的影响,基于门杰引理讨论了连通度随星间链路故障率的变化关系,仿真结果显示多路径并行传输方案能够将信息成功传输概率从76%提升至99%,以期为未来网络拓扑优化与可靠性提升提供有益的参考。
Satellite networks,with their advantages of wide-area coverage,flexible networking,and independence from terrestrial environmental constraints,have become a hotspot in 6G research.However,unlike traditional terrestrial networks,the high-speed movement of satellites presents numerous challenges in establishing and maintaining inter-satellite links.Additionally,complex environmental factors such as solar transit phenomena,ionospheric scintillation,and adverse weather conditions(e.g.rain and snow)can degrade the reliability of these links.Meanwhile,laser-based high-speed inter-satellite link technology is still in its infancy,with maturity yet to be improved.These factors may lead to inter-satellite link failures,thereby affecting the overall performance of satellite networks.Therefore,it is essential to investigate the impact of inter-satellite link failures on network reliability.This study first analyzes the influence 0x0E䥺Symbol`@@0x0Fof satellite network scale on reliability,proposing threshold boundaries for inter-satellite link failure rates under different network sizes.It then discusses the impact of satellite network topology configurations on reliability,presenting the relationships between network connectivity and average hop count with varying topological structures.Finally,the study explores the effect of multi-path transmission on reliability,deriving the relationship between connectivity and inter-satellite link failure rates based on Menger's theorem.Simulation results demonstrate that multi-path parallel transmission can enhance the probability of successful information delivery from 76%to 99%.These findings aim to provide valuable references for future network topology optimization and reliability enhancement.
作者
李朕
虞志刚
章扬
李果
郭涛
LI Zhen;YU Zhigang;ZHANG Yang;LI Guo;GUO Tao(China Satellite Network Innovation Co.,Ltd.,Beijing 100029,China)
出处
《无线电通信技术》
北大核心
2025年第4期713-723,共11页
Radio Communications Technology
基金
北京市科技新星计划(20240484748)
国家自然科学基金(62201534)。
关键词
卫星网络
星间链路
连通度
可靠性
多径协同传输
satellite network
inter-satellite link
connectivity
reliability
multi-path collaborative transmission
