摘要
Low-earth orbit(LEO)satellite networks ignite global wireless connectivity.However,signal outages and co-channel interference limit the coverage in traditional LEO satellite networks where a user is served by a single satellite.This paper explores the possibility of satellite cooperation in the downlink transmissions.Using tools from stochastic geometry,we model and analyze the downlink coverage of a typical user with satellite cooperation under Nakagami fading channels.Moreover,we derive the joint distance distribution of cooperative LEO satellites to the typical user.Our model incorporates fading channels,cooperation among several satellites,satellites'density and altitude,and co-channel interference.Extensive Monte Carlo simulations are performed to validate analytical results.Simulation and numerical results suggest that coverage with LEO satellites cooperation considerably exceeds coverage without cooperation.Moreover,there are optimal satellite density and satellite altitude that maximize the coverage probability,which gives valuable network design insights.
作者简介
corresponding author:Bodong Shang,received the B.Eng.degree in the School of Information Science and Technology at Northwest University,Xi'an,China,the M.S.degree in the School of Telecommunications Engineering at Xidian University,Xi'an,China,and the Ph.D.degree from the Department of Electrical and Computer Engineering at Virginia Tech,Blacksburg,USA.He was a Postdoctoral Research Associate at Carnegie Mellon University,Pittsburgh,USA.He is an Assistant Professor at Eastern Institute for Advanced Study(EIAS),Eastern Institute of Technology(EIT),Ningbo,China.He received the Chinese government award for outstanding self-financed students abroad and held a summer research internship at Nokia Bell Labs,USA.His current research areas are wireless communications and networking,including 6G,non-terrestrial networks,Internet of vehicles,integrated sensing and communications,edge computing,and reconfigurable intelligent surfaces;Xiangyu Li received the B.Eng.degree in Electronic Information Engineering from Nantong University,Nantong,China,in June 2021 and the M.S.degree in Electrical and Computer Engineering from Georgia Institute of Technology,Atlanta,United States,in May 2023.He is currently working toward the Ph.D.degree with Shanghai Jiao Tong University,Shanghai,China,in the EIT-SJTU Joint PhD Program.His research interestsincludespace--air-groundintegrated networks massive MIMO,reconfigurable intelligent surfaces,physical layer security,and performance analysis of wireless systems;Caiguo Li received the B.S.degree in the College of Computer and Information Engineering from Henan University,China,in 2020,and the M.S.degree in Computer Science and Technology from Shenzhen University,China,in 2023.She is a Research Assistant at the Eastern Institute for Advanced Study(EIAS),Ningbo,China.Her research interests include edge computing,wireless communication,and information security;Zhuhang Li received the B.S.degree from the University of Electronic Science and Technology of China(UESTC),Chengdu,China,in 2022,and the M.S.degree from the Nanyang Technological University,Singapore,in 2023.She is a Research Assistant at the Eastern Institute for Advanced Study(EIAS),Ningbo,China.Her research interests include spaceair-ground-sea integrated networks,and Internet-ofthings。
