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Covariance-Based Cooperative Activity Detection for Massive Grant-Free Random Access [article]

Xiaodan Shao, Xiaoming Chen, Derrick Wing Kwan Ng, Caijun Zhong, Zhaoyang Zhang
2020 arXiv   pre-print
This paper designs a cooperative activity detection framework for massive grant-free random access in the sixth-generation (6G) cell-free wireless networks based on the covariance of the received signals  ...  The cooperative activity detection problem is non-smooth and the unknown variables are coupled with each other for which conventional approaches are inapplicable.  ...  The main contributions of this paper are as follows: 1) The paper proposes a novel cooperative activity detection framework for grant-free random access in 6G cell-free wireless networks based on the covariance  ... 
arXiv:2008.10155v2 fatcat:jmexchzp4vembdhelfkps3bbba

Cooperative Activity Detection: Sourced and Unsourced Massive Random Access Paradigms [article]

Xiaodan Shao, Xiaoming Chen, Derrick Wing Kwan Ng, Caijun Zhong, Zhaoyang Zhang
2020 arXiv   pre-print
This paper investigates the issue of cooperative activity detection for grant-free random access in the sixth-generation (6G) cell-free wireless networks with sourced and unsourced paradigms.  ...  First, we propose a cooperative framework for solving the problem of device activity detection in sourced random access.  ...  Index Terms-Cooperative activity detection, sourced random access, unsourced random access, 6G cell-free wireless networks, covariance-based detection. I.  ... 
arXiv:2011.10197v1 fatcat:ebsdctttezhajff7e775ayqcl4

Massive Access for 5G and Beyond [article]

Xiaoming Chen, Derrick Wing Kwan Ng, Wei Yu, Erik G. Larsson, Naofal Al-Dhahir, Robert Schober
2020 arXiv   pre-print
This paper presents a comprehensive survey of aspects of massive access design for B5G wireless networks.  ...  Different from conventional human-type communication, massive access aims at realizing efficient and reliable communications for a massive number of IoT devices.  ...  In general, grant-free random access for massive access requires massive device detection at the receiver.  ... 
arXiv:2002.03491v2 fatcat:e632upafkvhwlm4m2mwhbeleam

An Efficient Active Set Algorithm for Covariance Based Joint Data and Activity Detection for Massive Random Access with Massive MIMO [article]

Ziyue Wang, Zhilin Chen, Ya-Feng Liu, Foad Sohrabi, Wei Yu
2021 arXiv   pre-print
This paper proposes a computationally efficient algorithm to solve the joint data and activity detection problem for massive random access with massive multiple-input multiple-output (MIMO).  ...  This paper employs a covariance based approach that formulates the detection problem as a maximum likelihood estimation (MLE) problem.  ...  random access [11] , cooperative activity detection in cell-free systems [12] , and activity detection with interference [13] .  ... 
arXiv:2102.03490v1 fatcat:nchqcxc6svbtfnluyagi33aaza

ML and MAP Device Activity Detections for Grant-Free Massive Access in Multi-Cell Networks [article]

Dongdong Jiang, Ying Cui
2021 arXiv   pre-print
Device activity detection is one main challenge in grant-free massive access, which is recently proposed to support massive machine-type communications (mMTC).  ...  Existing solutions for device activity detection fail to consider inter-cell interference generated by massive IoT devices or important prior information on device activities and inter-cell interference  ...  Therefore, grant-free massive access is recently proposed as an essential technique for supporting massive access.  ... 
arXiv:2106.10438v1 fatcat:mylrvkshh5gvjnvzudbgtf35ge

A Dimension Reduction-Based Joint Activity Detection and Channel Estimation Algorithm for Massive Access [article]

Xiaodan Shao, Xiaoming Chen, Rundong Jia
2019 arXiv   pre-print
Grant-free random access is a promising protocol to support massive access in beyond fifth-generation (B5G) cellular Internet-of-Things (IoT) with sporadic traffic.  ...  Specifically, in each coherence interval, the base station (BS) performs joint activity detection and channel estimation (JADCE) before data transmission.  ...  Then based on this work, [7] extended the massive unsourced random access to the case where the base station has a massive number of antennas and combined a grant-free non-coherent massive multiple-input  ... 
arXiv:1912.08952v1 fatcat:txzv7hcshrdani54cg7raanfmm

Massive MIMO for Internet of Things (IoT) Connectivity [article]

Alexandru-Sabin Bana, Elisabeth de Carvalho, Beatriz Soret, Taufik Abrão, José Carlos Marinello, Erik G. Larsson, Petar Popovski
2019 arXiv   pre-print
This paper fills this important gap by identifying the opportunities and challenges in exploiting massive MIMO for IoT connectivity.  ...  Exploiting the large number of degrees of freedom (DoFs) of massive MIMO essential for achieving high spectral efficiency, high data rates and extreme spatial multiplexing of densely distributed users.  ...  Grant-free random access protocols Grant-free transmissions rely on transmitting both pilot sequences and data as part of the initial access attempt.  ... 
arXiv:1905.06205v1 fatcat:xqe2z6evhrc27cvtxad5iiko4a

A Survey: Non-Orthogonal Multiple Access with Compressed Sensing Multiuser Detection for mMTC [article]

Mehmood Alam, Qi Zhang
2021 arXiv   pre-print
Non-Orthogonal Multiple Access (NOMA) is a new paradigm shift in the design of multiple user detection and multiple access.  ...  NOMA with compressive sensing based multiuser detection is one of the promising candidates to address the challenges of mMTC.  ...  Acknowledgments This work was partly supported by the Innovation Fund Denmark under Grant 8057-00059B.  ... 
arXiv:1810.05422v2 fatcat:q36omuar6rhslolnlavjf5boo4

Joint Activity Detection, Channel Estimation, and Data Decoding for Grant-free Massive Random Access [article]

Xinyu Bian, Yuyi Mao, Jun Zhang
2021 arXiv   pre-print
While grant-free random access has emerged as a promising mechanism for massive access, its potential has not been fully unleashed.  ...  activity detection.  ...  CONCLUSIONS This paper carried out the first holistic investigation that jointly considered activity detection, channel estimation, and data decoding for grant-free massive random access (RA).  ... 
arXiv:2107.05246v1 fatcat:twvrnbjysbcxbjv5pwtvnepgm4

2020 Index IEEE Transactions on Wireless Communications Vol. 19

2020 IEEE Transactions on Wireless Communications  
., Joint Access and Backhaul Resource Management in Satellite-Drone Networks: A Competitive Market Approach; TWC June 2020 3908-3923 Hu, Y.H., see Xia, M., TWC June 2020 3769-3781 Hua, C., see Li, M  ...  TWC Jan. 2020 650-664 Huang, A., see He, H., TWC Dec. 2020 7881-7896 Huang, C., Molisch, A.F., He, R., Wang, R., Tang, P., Ai, B., and Zhong, Z., Machine Learning-Enabled LOS/NLOS Identification for  ...  ., +, TWC Sept. 2020 5951-5965 On Throughput Improvement Using Immediate Re-Transmission in Grant-Free Random Access With Massive MIMO.  ... 
doi:10.1109/twc.2020.3044507 fatcat:ie4rwz4dgvaqbaxf3idysubc54

2018 IndexIEEE Wireless Communications LettersVol. 7

2018 IEEE Wireless Communications Letters  
., +, LWC Aug. 2018 674-677 Multi-User Detection Using ADMM-Based Compressive Sensing for Uplink Grant-Free NOMA.  ...  Agiwal, M., +, LWC June 2018 416-419 Multi-User Detection Using ADMM-Based Compressive Sensing for Uplink Grant-Free NOMA.  ... 
doi:10.1109/lwc.2018.2888676 fatcat:olfvetmkt5bt3c572e5y76b5pm

Wireless Access for Ultra-Reliable Low-Latency Communication (URLLC): Principles and Building Blocks [article]

Petar Popovski, Jimmy J. Nielsen, Cedomir Stefanovic, Elisabeth de Carvalho, Erik Ström, Kasper F. Trillingsgaard, Alexandru-Sabin Bana, Dong Min Kim, Radoslaw Kotaba, Jihong Park, René B. Sørensen
2017 arXiv   pre-print
We then discuss how these principles are applied in various elements of the system design, such as use of various diversity sources, design of packets and access protocols.  ...  The important messages are that there is a need to optimize the transmission of signaling information, as well as a need for a lean use of various sources of diversity.  ...  ACKNOWLEDGMENT The work has partly been supported by the European Research Council (ERC Consolidator Grant nr. 648382 WIL-LOW), and partly by the Horizon 2020 project ONE5G (ICT-760809).  ... 
arXiv:1708.07862v3 fatcat:fl32boljvzddfkrkdaeqb5hhwe

Wireless Access for Ultra-Reliable Low-Latency Communication: Principles and Building Blocks

Petar Popovski, Jimmy J. Nielsen, Cedomir Stefanovic, Elisabeth de Carvalho, Erik Strom, Kasper F. Trillingsgaard, Alexandru-Sabin Bana, Dong Min Kim, Radoslaw Kotaba, Jihong Park, Rene B. Sorensen
2018 IEEE Network  
We then discuss how these principles are applied in various elements of the system design, such as use of various diversity sources, design of packets and access protocols.  ...  The important messages are that there is a need to optimize the transmission of signaling information, as well as a need for a lean use of various sources of diversity.  ...  ACKNOWLEDGMENT The work has partly been supported by the European Research Council (ERC Consolidator Grant nr. 648382 WIL-LOW), and partly by the Horizon 2020 project ONE5G (ICT-760809).  ... 
doi:10.1109/mnet.2018.1700258 fatcat:rorpnu2afrecdhlzcd2x7aryqa

Wireless Access in Ultra-Reliable Low-Latency Communication (URLLC)

Petar Popovski, Cedomir Stefanovic, Jimmy J. Nielsen, Elisabeth de Carvalho, Marko Angjelichinoski, Kasper F. Trillingsgaard, Alexandru-Sabin Bana
2019 IEEE Transactions on Communications  
Two specific technologies are considered in the context of URLLC: massive MIMO and multi-connectivity, also termed interface diversity.  ...  This paper also touches on the importance of the proper statistical methodology for designing and assessing extremely high-reliability levels.  ...  A number of works address advanced grant-free and grant-based access schemes for cellular access networks. The benefits of multi-user detection in radio-access uplink are presented in [73] .  ... 
doi:10.1109/tcomm.2019.2914652 fatcat:7lzannx24bczrcpdfeg2xoqe3e

Secrecy Analysis and Active Pilot Spoofing Attack Detection for Multigroup Multicasting Cell-Free Massive MIMO Systems

Xianyu Zhang, Daoxing Guo, Kang An, Zhiguo Ding, Bangning Zhang
2019 IEEE Access  
Moreover, a mechanism based on the minimum description length (MDL) is presented to detect pilot spoofing attack.  ...  INDEX TERMS Physical layer security, cell-free massive MIMO, multigroup multicasting, pilot spoofing attack. 57332 2169-3536  ...  Authors in [22] presented three different schemes (at base station, intended user, or jointly) for detecting active eavesdropping.  ... 
doi:10.1109/access.2019.2914028 fatcat:7kbwuzk37bdihjraxlds2jfwby
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