摘要
The deployment of multiple intelligent reflecting surfaces(IRSs)in blockage-prone millimeter wave(mmWave)communication networks have garnered considerable attention lately.Despite the remarkably low circuit power consumption per IRS element,the aggregate energy consumption becomes substantial if all elements of an IRS are turned on given a considerable number of IRSs,resulting in lower overall energy efficiency(EE).To tackle this challenge,we propose a flexible and efficient approach that individually controls the status of each IRS element.Specifically,the network EE is maximized by jointly optimizing the associations of base stations(BSs)and user equipments(UEs),transmit beamforming,phase shifts of IRS elements,and the associations of individual IRS elements and UEs.The problem is efficiently addressed in two phases.First,the Gale-Shapley algorithm is applied for BS-UE association,followed by a block coordinate descent-based algorithm that iteratively solves the subproblems related to active beamforming,phase shifts,and element-UE associations.To reduce the tremendous dimensionality of optimization variables introduced by element-UE associations in large-scale IRS networks,we introduce an efficient algorithm to solve the associations between IRS elements and UEs.Numerical results show that the proposed elementwise control scheme improves EE by 34.24% compared to the network with IRS-all-on scheme.
基金
supported by the National Natural Science Foundation of China under grant U22A2003 and 62271515
Shenzhen Science and Technology Program under grant ZDSYS20210623091807023
supported by the National Natural Science Foundation of China under Grant 62301300.
作者简介
The corresponding author:Huang Xiaoxia received the B.E.and M.E degrees in electrical engineering both from Huazhong University of Science and Technology,Wuhan,China,in 2000 and 2002,respectively,and the Ph.D degree in electrical and computer engineering from the University of Florida,USA,in 2007.She is currently a Professor with School of Electronics and Communication Engineering at Sun Yat-Sen University.Her research interests include green wireless communication networks,intelligent wireless networks,and wireless computing.email:huangxiaoxia@mail.sysu.edu.cn;Chen Guolin received the B.S.degree in Communication Engineering from the College of Electronic Engineering,South China Agricultural University,Guangzhou,China,in 2020.He is currently pursuing the Ph.D degree with Sun Yat-Sen University(SYSU),Shenzhen,China.His research interests include reconfigurable intelligent surface and green communication;Deng Yiqin received her M.S.degree in software engineering and her Ph.D degree in computer science and technology from Central South University,Changsha,China,in 2017 and 2022,respectively.She is currently a Postdoctoral Research Fellow with the School of Control Science and Engineering,Shandong University,Jinan,China.She was a visiting researcher at the University of Florida,Gainesville,from 2019 to 2021.Her research interests include edge/fog computing,Internet of Vehicles,and resource management;Fang Yuguang received the M.S.degree from Qufu Normal University,China in 1987,a Ph.D degree from Case Western Reserve University,Cleveland,Ohio,USA,in 1994,and a Ph.D degree from Boston University,Boston,Massachusetts,USA in 1997.He joined the Department of Electrical and Computern Engineering at University of Florida in 2000 as an assistant professor,then was promoted to associate professor in 2003,full professor in 2005,and distinguished professor in 2019,respectively.Since August 2022,he has been the Chair Professor of Internet of Things with the Department of Computer Science at City University of Hong Kong,Hong Kong,China.Dr.Fang received many awards including the US NSF CAREER Award,US ONR Young Investigator Award,2018 IEEE Vehicular Technology Outstanding Service Award,IEEE Communications Society AHSN Technical Achievement Award(2019),CISTC Technical Recognition Award(2015),and WTC Recognition Award(2014),the Best Paper Award from IEEE ICNP(2006),and 2010-2011 UF Doctoral Dissertation Advisor/-Mentoring Award.He was the Editor-in-Chief of IEEE Transactions on Vehicular Technology(2013-2017)and IEEE Wireless Communications(2009-2012)and has served on several editorial boards of premier journals.He also served as the Technical Program Co-Chair of IEEE INFOCOM’2014.He is a fellow of ACM,IEEE,and AAAS.
