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Preamble slice orderly queue access scheme in cell-free dense communication systems
《Digital Communications and Networks》2025年第1期126-135,共10页Jun Sun Mengzhu Guo Jian Liu 
supported in part by the National Natural Science Foundation of China under grants 61771255;in part by the Provincial and Ministerial Key Laboratory Open Project under grant 20190904;in part by the Key Technologies R&D Program of Jiangsu (Prospective and Key Technologies for Industry)under Grants BE2022067,BE2022067-1 and BE2022067-2。
High reliability applications in dense access scenarios have become one of the main goals of 6G environments.To solve the access collision of dense Machine Type Communication(MTC)devices in cell-free communication sys...
关键词：Machine type communication Random access Reinforcement learning Access success probability Federated learning 
Deep Reinforcement Learning Based Joint Cooperation Clustering and Downlink Power Control for Cell-Free Massive MIMO
《China Communications》2024年第11期1-14,共14页Du Mingjun Sun Xinghua Zhang Yue Wang Junyuan Liu Pei 
supported by Guangdong Basic and Applied Basic Research Foundation under Grant 2024A1515012015;supported in part by the National Natural Science Foundation of China under Grant 62201336;in part by Guangdong Basic and Applied Basic Research Foundation under Grant 2024A1515011541;supported in part by the National Natural Science Foundation of China under Grant 62371344;in part by the Fundamental Research Funds for the Central Universities;supported in part by Knowledge Innovation Program of Wuhan-Shuguang Project under Grant 2023010201020316;in part by Guangdong Basic and Applied Basic Research Foundation under Grant 2024A1515010247。
In recent times,various power control and clustering approaches have been proposed to enhance overall performance for cell-free massive multipleinput multiple-output(CF-mMIMO)networks.With the emergence of deep reinfo...
关键词：cell-free massive MIMO CLUSTERING deep reinforcement learning power control 
Joint Beamforming Design for RIS-Assisted Cell-Free Network with Multi-Hop Transmissions
《Tsinghua Science and Technology》2023年第6期1115-1127,共13页Decai Shen Zijian Zhang Linglong Dai 
This work was supported by the National Key Research and Development Program of China(No.2020YB1807201);the National Natural Science Foundation of China(No.62031019);the European Commission through the H2020-MSCA-ITN META WIRELESS Research Project(No.956256).
The collaboration of multiple Reconfigurable Intelligent Surfaces(RISs)and Access Points(APs)enjoys advantages of capacity enhancement,power saving,etc.,making the RIS-assisted cell-free network an important architect...
关键词：Reconfigurable Intelligent Surface(RiS) cell-free network multi-hop transmissions BEAMFORMING 
Joint Flexible Duplexing and Power Allocation with Deep Reinforcement Learning in Cell-Free Massive MIMO System被引量：7
《China Communications》2023年第4期73-85,共13页Danhao Deng Chaowei Wang Zhi Zhang Lihua Li Weidong Wang 
supported by the National Key R&D Program of China under Grant 2020YFB1807204;the BUPT Excellent Ph.D.Students Foundation under Grant CX2022306。
Network-assisted full duplex(NAFD)cellfree(CF)massive MIMO has drawn increasing attention in 6G evolvement.In this paper,we build an NAFD CF system in which the users and access points(APs)can flexibly select their du...
关键词：cell-free massive MIMO flexible duplexing sum fair spectral efficiency deep reinforcement learning asynchronous advantage actor-critic 
A survey on user-centric cell-free massive MIMO systems
《Digital Communications and Networks》2022年第5期695-719,共25页Shuaifei Chen Jiayi Zhang Jing Zhang Emil Björnson Bo Ai 
This work was supported in part by National Key R&D Program of China under Grant 2020YFB1807201;in part by National Natural Science Foundation of China under Grants 61971027,U1834210,and 61961130391;in part by Beijing Natural Science Foundation under Grant L202013;in part by Frontiers Science Center for Smart High-speed Railway System under Grant 2020JBZD005;in part by the Royal Society Newton Advanced Fellowship under Grant NA191006.E.Björnson was supported by the Grant 2019-05068 from the Swedish Research Council.
The mobile data traffic has been exponentially growing during the last several decades.This was enabled by the densification of the network infrastructure in terms of increased cell density(i.e.,Ultra-Dense Network(UD...
关键词：6G network User-centric cell-free network Massive multiple-input multiple-output 
MEC-Empowered Non-Terrestrial Network for 6G Wide-Area Time-Sensitive Internet of Things被引量：3
《Engineering》2022年第1期96-107,共12页Chengxiao Liu Wei Feng Xiaoming Tao Ning Ge 
the National Key R&D Program of China(2018YFA0701601 and 2020YFA0711301);the National Natural Science Foundation of China(61771286,61941104,and 61922049);the Tsinghua University-China Mobile Communications Group Co.,Ltd.Joint Institute.
In the upcoming sixth-generation(6G)era,the demand for constructing a wide-area time-sensitive Internet of Things(IoT)continues to increase.As conventional cellular technologies are difficult to directly use for wide-...
关键词：CELL-FREE Mobile edge computing Non-terrestrial networks Sixth-generation Wide-area time-sensitive IoT 
Wireless Powered IoE for 6G: Massive Access Meets Scalable Cell-Free Massive MIMO被引量：11
《China Communications》2020年第12期92-109,共18页Shuaifei Chen Jiayi Zhang Yu Jin Bo Ai 
A key challenge to the scalable deployment of the energy self-sustainability(ESS)Internet of Everything(IoE)for sixth-generation(6G)networks is juggling massive connectivity and high spectral efficiency(SE).Cell-free ...
关键词：6G network cell-free massive MIMO energy self-sustainability Internet of Everything 
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