低轨高通量卫星按需波束调度技术

doi:10.11959/j.issn.2096-8930.2022018

天地一体化信息网络 ›› 2022, Vol. 3 ›› Issue (2): 28-38.doi: 10.11959/j.issn.2096-8930.2022018

所属专题：专题：卫星互联网空间载荷

• 专题：卫星互联网空间载荷 • 上一篇下一篇

低轨高通量卫星按需波束调度技术

韩帅¹, 吴宜航¹, 李季蹊¹, 陈祖挺¹, 孙思月², 梁广²

¹ 哈尔滨工业大学通信技术研究所，黑龙江哈尔滨 150001
² 中国科学院微小卫星创新研究院，上海 201306

修回日期:2022-04-10 出版日期:2022-06-20 发布日期:2022-06-01
作者简介:韩帅（1981-），哈尔滨工业大学教授，博士生导师，主要研究方向为卫星通信、宽带无线通信、物理层安全等；主持国家自然科学基金青年项目、国家自然科学基金面上项目、中央高校基本科研业务费重大专项资金资助项目、中国空间技术研究院创新基金项目等国家及省部级科研项目20余项；获黑龙江省科技进步奖二等奖2项；发表论文100余篇，获授权国家发明专利40项
吴宜航（1999-），哈尔滨工业大学硕士生，主要研究方向为信道编解码和卫星通信
李季蹊（1997-），哈尔滨工业大学硕士生，主要研究方向为低轨卫星互联网和物理层安全
陈祖挺（2000-），哈尔滨工业大学本科生，主要研究方向为卫星网络接入和链路调度
孙思月（1985-），中国科学院微小卫星创新研究院研究员，硕士生导师，中科院青促会会员、上海市青年扬帆计划人才、中科院上海分院青年英才，一直专注于卫星移动通信研究；作为项目负责人，主持国家自然科学基金、中科院国防重点实验室基金等多项国家及省部级科技项目，参与了遥感三十号、行云天基物联网通信载荷等多个重大卫星工程项目研制，申请发明专利22项，发表论文30余篇
梁广（1983-），中国科学院微小卫星创新研究院研究员，硕士生导师，中科院青促会成员（优秀会员），上海市拔尖人才计划、启明星计划成员，主要研究方向为卫星通信及星载相控阵天线技术；主持国家自然科学基金、上海市自然科学基金、科学院国防创新基金等多项国家科技项目，获得省部级奖励和荣誉称号4项；发表学术论文30余篇，申请发明专利20余项
基金资助:
国家自然科学基金项目(61831002);国家自然科学基金项目(U21A20444)

On-Demand Beam Scheduling Technology of Low-Orbit High-Throughput Satellite

Shuai HAN¹, Yihang WU¹, Jixi LI¹, Zuting CHEN¹, Siyue SUN², Guang LIANG²

¹ Communications Research Center, Harbin Institute of Technology, Harbin 150001, China
² Innovation Academy for Microsatellites of Chinese Academy of Sciences, Shanghai 201306, China

Revised:2022-04-10 Online:2022-06-20 Published:2022-06-01
Supported by:
The National Natural Science Foundation of China(61831002);The National Natural Science Foundation of China(U21A20444)

摘要/Abstract

摘要：

低轨高通量卫星互联网能够满足终端用户与日俱增的速率和连接密度要求，为用户提供全天候低时延超宽带通信服务。其如何适应低轨下行场景中灵活多变且分布不均的地面业务需求并提高系统吞吐量是当前亟待解决的问题。在对低轨高通量卫星下行系统波束成形架构及低轨卫星星地衰落与高通量卫星波束间干扰进行建模的基础上，构建低轨高通量卫星下行信道模型；对低轨高通量卫星按需波束调度方案进行研究，建立波束调度最优化问题模型以保证资源的利用率；提出一种面向高通量卫星互联网的按需波束调度方法，通过少量波束按需时分复用覆盖多个小区的方式提高资源的利用率，有效抑制波束间的干扰，提高系统的吞吐量。

关键词: 高通量卫星, 下行系统, 波束调度

Abstract:

Low-orbit high-throughput satellite internet can satisfy the increasing speed and connection density requirements of end users and provide users with all-weather low-latency ultra-broadband communication services.At the same time, how to adapt to the fl exible and unevenly distributed terrestrial service requirements in low-orbit downlink scenarios and improve system throughput is an urgent problem to be solved.Based on the modeling of the beamforming architecture of the low-orbit highthroughput satellite downlink system and the satellite-to-earth fading of the low-orbit satellite and the inter-beam interference of the high-throughput satellite, the low-orbit high-throughput satellite downlink channel model was established.Based on the research of the high-throughput satellite on-demand beam scheduling scheme, the beam scheduling optimization problem model was established to ensured the utilization of resources, and the on-demand beam scheduling technology for high-throughput satellite internet was proposed, the method of using a small amount of beams to cover multiple cells by using on-demand time division multiplexing improved the utilization rate of resources, effectively suppressed the interference between beams, and improved the throughput of the system.

Key words: high throughput satellite, downlink system, beam scheduling

中图分类号:

TP393

韩帅, 吴宜航, 李季蹊, 陈祖挺, 孙思月, 梁广. 低轨高通量卫星按需波束调度技术[J]. 天地一体化信息网络, 2022, 3(2): 28-38.

Shuai HAN, Yihang WU, Jixi LI, Zuting CHEN, Siyue SUN, Guang LIANG. On-Demand Beam Scheduling Technology of Low-Orbit High-Throughput Satellite[J]. Space-Integrated-Ground Information Networks, 2022, 3(2): 28-38.

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参数	值
波束调度相关参数
卫星波束数K	18个
波束小区数N	37个
高优先级小区数N_priority	2个
地面小区流量需求分布T_n/(Mbit·s^-1)	T_n～M·U(100,1 000)
时延约束τ	0.2 s
系统公平性系数ρ	0.8
卫星通信场景参数
波束带宽B	500 MHz
卫星轨道高度L	600 km
3 dB波束宽度	4.6°
波束功率P_t	20 dBW
载波频率f_c	20 GHz
地面等效噪声温度T_noise	300 K
卫星发射天线增益G_t	50 dBi
移动终端天线增益G_r	0 dBi
频率复用方案	三色复用

低轨高通量卫星按需波束调度技术

On-Demand Beam Scheduling Technology of Low-Orbit High-Throughput Satellite

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参考文献 23

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