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

作　　者：韩帅[1] 吴宜航 李季蹊 陈祖挺 孙思月 梁广 HAN Shuai;WU Yihang;LI Jixi;CHEN Zuting;SUN Siyue;LIANG Guang(Communications Research Center,Harbin Institute of Technology,Harbin 150001,China;Innovation Academy for Microsatellites of Chinese Academy of Sciences,Shanghai 201306,China)

机构地区：[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

出　　处：《天地一体化信息网络》2022年第2期28-38,共11页Space-Integrated-Ground Information Networks

基　　金：国家自然科学基金项目(No.61831002,No.U21A20444)。

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。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 flexible 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.

关 键 词：高通量卫星 下行系统 波束调度 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]