摘要
针对广域海洋和陆地复杂、异构的通信环境,为了同时满足海洋和陆地区域用户的数据传输容量和网络覆盖需求,对密集低轨卫星网络进行了研究。利用随机几何和概率论、排队论的方法,对不同数据流量下密集低轨卫星网络提供的平均回程容量进行了分析。提出了海陆密集低轨卫星星座部署方案,在考虑海洋和陆地差异化的传输覆盖需求和卫星移动性的基础上,最小化了星座部署所需要的卫星数量。对网络覆盖需求、数据流量、地面站分布密度、地面站最小仰角、卫星轨道数量带来的星座设计上的影响进行了仿真,给出了最优的地面站仰角和卫星轨道部署方案。
Ultra⁃dense low earth orbit(LEO)satellite network is investigated to satisfy the capacity and coverage requirements of terrestrial satellite terminals(TST)in both ocean and land area.The average backhaul capacity of each TST is analyzed based on the stochastic geometry,probability theory,and queuing theory.To fulfill different requirement of backhaul capacity and coverage ratio in the ocean area and land area,an ultra⁃dense LEO satellites constellation deployment scheme is designed to minimize the total number of LEO satellites.The influence of the following factors on the satellite number is discussed,including the coverage requirement,traffic arri⁃val rate,TST density,TST minimum elevation angle,and the number of LEO orbits.The optimal minimum elevation angle and the optimal number of LEO orbits are obtained to minimize the total number of satellites.
作者
王鹏飞
邸博雅
唐斌
王成才
宋令阳
陆军
WANG Pengfei;DI Boya;TANG Bin;WANG Chengcai;SONG Lingyang;LU Jun(School of Electrionics Engineering and Computer Science,Peking University,Beijing 100871,China;China Academic of Electronics and Information Technology,Beijing 100041,China)
出处
《无线电通信技术》
2021年第4期402-409,共8页
Radio Communications Technology
基金
国家自然科学基金项目(61931019,61911540076)。
关键词
密集低轨卫星网络
卫星星座设计
数据流量
Ultra⁃dense LEO satellite
LEO satellite constellation design
satellite number minimization
