Results 71 to 80 of about 255 (102)
Rate-Splitting Assisted Massive Machine-Type Communications in Cell-Free Massive MIMO
IEEE Communications Letters, 2022 This letter focuses on integrating rate-splitting multiple-access (RSMA) with time-division-duplex Cell-free Massive MIMO (multiple-input multiple-output) for massive machine-type communications. Due to the large number of devices, their sporadic access behaviour and limited coherence interval, we assume a random access strategy with all active devices
Yijie Mao +2 more
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A secure Device-to-Device communication scheme for massive Machine Type Communication
Computers & Security, 2021Abstract Massive Machine Type Communication (mMTC) services aims to provide universal connectivity to thousands of low-power, low-cost devices with the support of 5G cellular networks. Device to Device (D2D) communication under 5G cellular network envisages interaction among heterogeneous and previously un-associated devices with diverse requirements,
Probidita Roychoudhury +2 more
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Pilot beamforming for massive machine type communication systems
2017 IEEE/CIC International Conference on Communications in China (ICCC), 2017In this paper, we propose a novel pilot beamforming and CSI acquisition strategy for machine-type-communication systems to achieve reduction in pilot overhead and improve the channel estimation performance. Key idea of the proposed beam-forming technique is to sparsify the time-domain channel vector using the beamforming.
Hyoungju Ji, Jun Won Choi, Byonghyo Shim
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Practical Synchronization Waveform for Massive Machine-Type Communications
IEEE Transactions on Communications, 2019This paper proposes a practical synchronization waveform that is resilient to frequency error for machine-type communications with applications in massive Internet of Things (IoT). Mathematical properties of the waveform are derived, which are keys to addressing the practical issues.
Jingjing Zhang 0006 +2 more
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A Novel Waveform for Massive Machine-Type Communications in 5G
2017 IEEE Wireless Communications and Networking Conference (WCNC), 2017This paper proposes a novel waveform for the uplink of massive machine-type communications (mMTC) in 5G. It has a halved subcarrier spacing than that of the orthogonal frequency division multiplexing (OFDM) with a discrete cosine transform (DCT) matrix based precoder on the transmitter side. It can keep the subcarriers orthogonal in the real domain and
Fan Yang 0102, Xin Wang 0133
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Iterative List Detection and Decoding for Massive Machine-Type Communications
IEEE Transactions on Communications, 2020The main challenge of massive machine-type communications (mMTC) is the joint activity and signal detection of devices. The mMTC scenario with many devices transmitting data intermittently at low data rates and via very short packets enables its modelling as a sparse signal processing problem. In this work, we consider a grant-free system and propose a
Roberto B. Di Renna +1 more
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RACH performance in massive machine-type communications access scenario
2018 IEEE Wireless Communications and Networking Conference (WCNC), 2018With the increasing number of devices performing Machine-Type Communications (MTC), mobile networks are expected to encounter a high load of burst transmissions. One bottleneck in such cases is the Random Access Channel (RACH) procedure, which is responsible for the attachment of devices, among other things. In this paper, we performed a rich-parameter
Nibia Souza Bezerra +4 more
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Introduction on Massive Machine-Type Communications (mMTC)
2019With the rise of a new round of scientific and technological revolutions and industrial changes in the world, the emergence of a large number of new applications, new businesses, new fields and new markets pose more requirements and challenges to existing mobile communication technologies [1].
Fanggang Wang, Guoyu Ma
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Scalable Spectrum Access System for Massive Machine Type Communication
IEEE Network, 2018Future 5G networks aspire to enable new services with vastly different data rate, latency and scalability requirements. The consensus is that these new services will fall into three categories: eMBB, URLLC, and mMTC. Due to unique characteristics of these services and the limited availability of finite spectrum resources, 5G will need to carefully map ...
Beeshanga Abewardana Jayawickrama +3 more
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Overload control of massive random access for machine-type communications
Expert Systems with Applications, 2017We show that random access retransmissions can lead to performance degradation.A Markov model is proposed to evaluate the performance of LTE random access.There is an optimal number of retransmissions for massive random access.Random access resources are separated into two subsets for MTC overload control.Conventional and proposed schemes can be used ...
Woon-Young Yeo +2 more
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