Results 21 to 30 of about 4,905,659 (296)
Multi-Cell Reception for Uplink Grant-Free Ultra-Reliable Low-Latency Communications
IEEE Access, 2019 The fifth-generation (5G) radio networks will support ultra-reliable low-latency communications (URLLC). In the uplink, the latency can be reduced by removing the time-consuming and error-prone scheduling procedure and, instead, using the grant-free (GF)
Thomas H. Jacobsen +5 more
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Random access for massive Internet of things:current status, challenges and opportunities
Tongxin xuebao, 2021 In conventional communication systems, the random access (RA) is a necessary procedure for a user equipment (UE) to establish wireless connection to the network before actual data transmission.Focusing on the massive IoT with large number of nodes, the ...
Pingzhi FAN +5 more
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Sequence Design and User Activity Detection for Uplink Grant-Free NOMA in mMTC Networks
IEEE Open Journal of the Communications Society, 2021 Massive machine type communications (mMTC) is one of the three major scenarios in 5G wireless networks. mMTC is an uplink-dominant scenario that supports massive connectivity of small-size packets and sporadic traffic.
Nai-Hsuan Huang, Tzi-Dar Chiueh
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A Reconfigurable Access Scheme for Massive-MIMO MTC Networks
IEEE Access, 2021 This paper presents an efficient reconfigurable access scheme for massive machine-type communication networks, where to provide massive connectivity, the base station is equipped with a large-scale antenna array.
Atoosa Dalili Shoaei +2 more
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Reconfigurable intelligent surface assisted grant-free massive access (invited paper)
Intelligent and Converged Networks, 2022 Massive machine-type communications (mMTC) is envisioned to be one of the pivotal scenarios in the fifth-generation (5G) wireless communication, where the explosively emerging Internet-of-Things (IoT) applications have triggered the demand for services ...
Xingyu Zhou +5 more
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Performance Analysis of Signature-Based Grant-Free Random Access Under Impersonation Attacks
IEEE Access, 2022 In massive machine-type communications (mMTC), user-specific and non-orthogonal signatures can be assigned to wireless devices for uplink grant-free access.
Nam Yul Yu
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Power control optimization for uplink grant-free URLLC [PDF]
2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018 Ultra-reliable and low latency communication (URLLC) presents the most challenging use cases for fifth generation (5G) mobile networks. Traditionally the focus for mobile broadband has been to optimize the system throughput for high speed data traffic.
Renato Abreu +5 more
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IEEE Access, 2017 Sparse code multiple access (SCMA), as a promising non-orthogonal multiple access scheme for the 5G system, aims to achieve massive connections and grant-free transmission in the radio access scenario.
Guangjin Chen +3 more
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Nurani, 2021 Grant is a unilateral agreement by a grantor that is carried out by the grantor to the grantee who gives goods free of charge to the grantee. This grant is carried out between the grantor and the grantee is still alive and well.
Junaidi Junaidi, Mila Surahmi
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Grant-Free Non-Orthogonal Multiple Access for IoT: A Survey [PDF]
IEEE Communications Surveys & Tutorials, 2020 Survey ...
Muhammad Basit Shahab +3 more
openaire +2 more sources