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UltraStar:A Lightweight Simulator of Ultra-Dense LEO Satellite Constellation Networking for 6G

查看全文 作　　者：Xiaoyu [1,2,3]Liu;Ting [1,2,3]Ma;Zhixuan [1,2,3]Tang;Xiaohan [1,2,3]Qin;Haibo [1,2,3]Zhou;Xuemin(Sherman)[1,3]Shen 高影响力作者 机构地区：[1]School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China;[2]Department of Electrical and Computer Engineering,University of Waterloo,Waterloo N2L 3G1,Canada;[3]IEEE高影响力机构 出　　处：《IEEE/CAA Journal of Automatica Sinica》索引2023年第10卷第3期,共14页高影响力期刊 基　　金：supported in part by the National Key Research and Development Program of China(2020YFB1806104);the Natural Science Fund for Distinguished Young Scholars of Jiangsu Province(BK20220067);the Natural Sciences and Engineering Research Council of Canada(NSERC)。 摘　　要：The mega-constellation network has gained significant attention recently due to its great potential in providing ubiquitous and high-capacity connectivity in sixth-generation(6G)wireless communication systems.However,the high dynamics of network topology and large scale of mega-constellation pose new challenges to the constellation simulation and performance evaluation.In this paper,we introduce UltraStar,a lightweight network simulator,which aims to facilitate the complicated simulation for the emerging mega-constellation of unprecedented scale.Particularly,a systematic and extensible architecture is proposed,where the joint requirement for network simulation,quantitative evaluation,data statistics and visualization is fully considered.For characterizing the network,we make lightweight abstractions of physical entities and models,which contain basic representatives of networking nodes,structures and protocol stacks.Then,to consider the high dynamics of Walker constellations,we give a two-stage topology maintenance method for constellation initialization and orbit prediction.Further,based on the discrete event simulation(DES)theory,a new set of discrete events is specifically designed for basic network processes,so as to maintain network state changes over time.Finally,taking the first-generation Starlink of 11927 low earth orbit(LEO)satellites as an example,we use UltraStar to fully evaluate its network performance for different deployment stages,such as characteristics of constellation topology,performance of end-to-end service and effects of network-wide traffic interaction.The simulation results not only demonstrate its superior performance,but also verify the effectiveness of UltraStar. 关 键 词：Discrete event simulation(DES) mega-constellation network dynamics performance evaluation simulation architecture design
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