| 摘要: |
| 低轨卫星网络可以提供广覆盖、低时延、大容量的通信服务和随遇接入的网络服务，可有效弥补地面通信网络和高轨卫星网络的不足。近年来“星链”“一网”等星座项目推动了低轨巨型星座的飞速发展。卫星网络容量是网络性能评价的重要指标，传统方法计算复杂度高、耗时长，且计算开销随网络节点数迅速增加，在巨型星座网络评估中产生巨大计算开销。面向低轨巨型星座网络容量评估问题，提出了一种基于最大流的网络容量评估方法，与传统方法相比计算复杂度和计算耗时大大降低。以“星链”星座为例，分析了星座构型、星间链路拓扑连接方式、链路容量及用户需求量对巨型星座网络容量的影响。仿真分析结果对未来低轨巨型星座网络建设具有指导意义。 |
| 关键词: 低轨卫星网络 网络容量 最大流 星链 |
| DOI： |
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| 基金项目:大学科研计划(ZK22-02) |
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| Capacity Evaluation and Analysis of LEO Mega-Constellation Network |
| YANG Huaguo,CHEN Quan,YANG Zipeng,ZHANG Qun,WU Shuai,YANG Lei |
| (College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China;Academy of Military Sciences, Beijing 100091, China) |
| Abstract: |
| LEO satellite network can provide wide-area coverage, low latency, high capacity communication services and random access network services, which can effectively compensate for the limitations of terrestrial network and high-orbit satellite network. In recent years, the constellation projects such as Starlink and OneWeb have accelerated the development of LEO mega-constellations. Satellite network capacity is an important index of network performance evaluation. However, traditional simulation methods have high computational complexity and time consumption, and the computational cost increases rapidly with the number of network nodes, resulting in huge computational costs in the evaluation of mega-constellation network. Aiming at the capacity evaluation of LEO mega-constellation network, an evaluation method of LEO satellite network based on the maximum flow is proposed, which greatly reduces the computational complexity and time consumption compared with traditional methods.Take Starlink as an example to simulate and analyze the influence of constellation configuration, topological connection mode of inter-satellite links, link capacity and user demand on the capacity of LEO mega-constellation network. The simulation results are of guiding significance for the future construction of LEO mega-constellation network. |
| Key words: LEO satellite network Network capacity Maximum flow Starlink |