Results 21 to 30 of about 324,548 (250)
Towards Massive Connectivity Support for Scalable mMTC Communications in 5G Networks
IEEE Access, 2018 The fifth generation of cellular communication systems is foreseen to enable a multitude of new applications and use cases with very different requirements.
Carsten Bockelmann +18 more
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Massive Access in Media Modulation Based Massive Machine-Type Communications [PDF]
IEEE Transactions on Wireless Communications, 2022 Accepted by IEEE Transactions on Wireless Communications.
Li Qiao 0001 +5 more
openaire +3 more sources
Large-scale terminal access algorithm based on slot ALOHA and adaptive access class barring
物联网学报, 2021 In order to solve the problem of high collision rate and low timeliness of large-scale terminals access in the Internet of things, a large-scale terminal access algorithm based on slot ALOHA and adaptive access class barring (ACB) was proposed.Firstly ...
Zhenyu ZHU +3 more
doaj +2 more sources
Grant-Free Massive Random Access With a Massive MIMO Receiver [PDF]
2019 53rd Asilomar Conference on Signals, Systems, and Computers, 2019 We consider the problem of unsourced random access (U-RA), a grant-free uncoordinated form of random access, in a wireless channel with a massive MIMO base station equipped with a large number $M$ of antennas and a large number of wireless single-antenna devices (users).
Alexander Fengler +3 more
openaire +2 more sources
Phase Transition Analysis for Covariance-Based Massive Random Access With Massive MIMO [PDF]
IEEE Transactions on Information Theory, 2022 This paper considers a massive random access problem in which a large number of sporadically active devices wish to communicate with a base station (BS) equipped with massive multiple-input multiple-output (MIMO) antennas. Each device is preassigned a unique signature sequence, and the BS identifies the active devices by detecting which sequences are ...
Zhilin Chen +3 more
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Index Modulation–Aided Mixed Massive Random Access
Frontiers in Communications and Networks, 2021 In this study, a mixed massive random access scheme is considered where part of users transmit both common information and user-specific information, while others transmit only common information.
Zijie Liang, Jianping Zheng, Jie Ni
doaj +1 more source
Massive Uncoordinated Multiple Access for Beyond 5G [PDF]
IEEE Transactions on Wireless Communications, 2022 Existing wireless communication systems have been mainly designed to provide substantial gain in terms of data rates. However, 5G and Beyond will depart from this scheme, with the objective not only to provide services with higher data rates. One of the main goals is to support massive machine-type communications (mMTC) in the IoT applications ...
Mostafa Mohammadkarimi +2 more
openaire +5 more sources
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
doaj +1 more source
Massive MIMO Unsourced Random Access
CoRR, 2019 We consider an extension of the massive unsourced random access originally proposed by Polyanskiy to the case where the receiver has a very large number of antennas (a massive MIMO base station) and no channel state information is given to the receiver (fully non-coherent detection).
Alexander Fengler +3 more
openaire +2 more sources
Hybrid Space-Frequency Access for Underwater Acoustic Networks
IEEE Access, 2022 Underwater acoustic networks have recently risen as an effective support to several marine and oceanic applications. However, the potential presence of a large number of nodes simultaneously connected has pushed the scientific community to address the ...
Andrea Petroni +6 more
doaj +1 more source