Bomin Mao (School of Cybersecurity, Northwestern Polytechnical University, China); Jiajia Liu (Northwestern Polytechnical University, China)
Abstract:
Ultra-dense Low Earth Orbit (LEO) satellites can provide users with flexible, seamless, and high-throughput communication services, which can complement the shortcomings of terrestrial communications and conventional Geosynchronous Earth Orbit (GEO) satellite-based communications. Besides the excellent communication performance, the low expense to produce and launch LEO satellites has inspired many Internet Service Providers (ISPs) to construct their own LEO satellite networks. However, the qualified End-to-End (E2E) performance provision is challenged by the ultra density and high dynamics of LEO satellites as well as the uneven distribution of service requests which complicates the satellite accessing, networking, and routing. Worldwide researchers from academia and industry have devoted significant efforts to ultra-dense LEO satellite communications. In this tutorial, we first introduce the system architecture, applications, and large-scale LEO satellite constellations. Then, the characteristics and management of LEO satellite constellations are discussed, followed by which are the state-of-the-art techniques and simulation platforms including Artificial Intelligence (AI) and digital twin. We conduct the review of studies on LEO satellite accessing, networking, and routing. The principles to select the best LEO satellites for ground users to access the networks as well as the performance optimizations are introduced. For networking and routing of LEO satellites, we discuss how to establish the Radio Frequency (RF) or laser inter-satellite links, and construct the E2E paths according to the link quality, network traffic load, and service requirements. Finally, the challenges and future directions are introduced.
Short bios:
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Bomin Mao (S’15, M’19) is currently a full professor at the School of Cybersecurity, Northwestern Polytechnical University. He was an associate professor and an assistant professor at the Graduate School of Information Sciences (GSIS), Tohoku University, Japan, from 2020 to 2021 and from 2019 to 2020, respectively. He has published more than 40 peer-reviewed papers in many high-quality publications, including prestigious IEEE journals and conferences. He received several Best Paper Awards from IEEE conferences, such as IEEE Global Communications Conference in 2017 (GLOBECOM’17), GLOBECOM’18, and IEEE International Conference on Network Infrastructure and Digital Content in 2018 (IC-NIDC 2018). He was a recipient of the prestigious 2020 ComSoc Asia-Pacific Outstanding Paper Award, 2020 Niwa Yasujiro Outstanding Paper Award, and 2020 IEEE Computer Society Tokyo/Japan Joint Local Chapters Young Author Award. His research interests are involving space-air-ground integrated networks, Internet of Things, intelligent collected vehicles, particularly with applications of machine intelligence and deep learning.
Jiajia Liu (SM’15) is a full professor (Vice Dean) at the School of Cybersecurity, Northwestern Polytechnical University, and was a Full Professor (2013-2018) at the School of Cyber Engineering, Xidian University. He has published more than 200 peerreviewed papers in many high-quality publications, including prestigious IEEE journals and conferences. He received 2020 IEEE ComSoc Best YP Award in Academia, 2019 IEEE VTS Early Career Award, IEEE ComSoc Asia-Pacific Outstanding Young Researcher Award in 2017, the Best Paper Awards from many international conferences including IEEE flagship events, such as IEEE GLOBECOM in, 2022, 2019, and 2016, IEEE WiMob in 2019, IEEE WCNC in 2012 and 2014, IEEE IC-NIDC in 2018. His research interests cover a wide range of areas including wireless and mobile ad hoc networks, space-air-ground integrated networks, intelligent and connected vehicles, mobile/edge/cloud computing and storage, Internet of Things security. He is the Chair of IEEE IOT-AHSN TC, and is a Distinguished Lecturer of the IEEE Communications Society and Vehicular Technology Society.