Hybrid NOMA based MIMO offloading for mobile edge computing in 6G networks

Dursun, Yunus; Fang, Fang; Ding, Zhiguo

doi:10.23919/jcc.2022.00.024

Cited by 21 publications

(7 citation statements)

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“…in which λ k is the eigenvalues associated with the eigenvectors of the MIMO channel matrix. An alternative method is detailed in [13]- [15] and relies on using generalized singu-lar value decomposition (GSVD) -a technique considered to be an efficient approach to channel evaluation. It is worth noting that the two methods can be applied to any number of transmitting and receiving antennas, i.e.…”

Section: Input: H H H N and Y Y Y Nmentioning

confidence: 99%

“…Mobile edge computing (MEC) utilizing the MIMO-NOMA approach has been proposed in [13] to cope with the high demand for suitable data rates observed in sixth generation wireless communication networks (6G). In the paper, the transmission delay existing in a MEC-MIMO-NOMA system was minimized for the sake of enhancing spectral and energy efficiencies.…”

Section: Introduction and Related Workmentioning

confidence: 99%

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Performance Enhancement of Cooperative MIMO-NOMA Systems Over Sub-6 GHz and mmWave Bands

Saleh

Ahmed

2023

JTIT

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In this paper, two radio links with different frequency bands are considered for base stations (BS) serving users via decode-and-forward (DF) cooperative relays. Backhaul and access links are proposed with sub-6 GHz and millimeter wave (mmWave) bands, respectively. Non-orthogonal multiple access (NOMA) is employed in the backhaul link to simultaneously transmit a superposed signal in the power domain, using the same band. The superposed signals, containing two signals that differ in terms of power allocation factors (PAFs), are designed for two selected DF relays in the BS. The two relays are chosen from several relays to be serviced by the BS based on a pairing algorithm that depends on different users’ circumstances. The furthest DF relay detects the incoming NOMA signal directly, while the nearest one applies successive interference cancellation (SIC) before extracting its signal. Each DF relay forwards the detected signals toward their intended users over mmWave channels. Three performance metrics are utilized to evaluate the system’s performance: outage probability, achievable throughput, and bit error rate. Comparisons between two mmWave bands in the access link (28 and 73 GHz) are made to demonstrate the superiority of the 28 GHz band in terms of the three performance-related metrics.

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Section: Input: H H H N and Y Y Y Nmentioning

confidence: 99%

Section: Introduction and Related Workmentioning

confidence: 99%

Performance Enhancement of Cooperative MIMO-NOMA Systems Over Sub-6 GHz and mmWave Bands

Saleh

Ahmed

2023

JTIT

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“…It is very difficult to compare channel matrices in MIMO networks. In their work [24], [25], the authors propose the generalized singular value decomposition (GSVD) approach turning MIMO channels into several single-input single-output (SISO) channels [24], [25]. The authors look at how well MIMO-NOMA networks minimize delays when limits concerning transmission time and power are imposed.…”

Section: Related Workmentioning

confidence: 99%

Investigation of Vehicular S-LSTM NOMA Over Time Selective Nakagami-m Fading with Imperfect CSI

Shankar¹,

Chaudhar²,

Mishra³

2022

JTIT

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In this paper, the performance of a deep learning based multiple-input multiple-output (MIMO) non-orthogonal multiple access (NOMA) system is investigated for 5G radio communication networks. We consider independent and identically distributed (i.i.d.) Nakagami-m fading links to prove that when using MIMO with the NOMA system, the outage probability (OP) and end-to-end symbol error rate (SER) improve, even in the presence of imperfect channel state information (CSI) and successive interference cancellation (SIC) errors. Further more, the stacked long short-term memory (S-LSTM) algorithm is employed to improve the system’s performance, even under time-selective channel conditions and in the presence of terminal’s mobility. For vehicular NOMA networks, OP, SER, and ergodic sum rate have been formulated. Simulations show that an S-LSTM-based DL-NOMA receiver outperforms least square (LS) and minimum mean square error (MMSE) receivers. Furthermore, it has been discovered that the performance of the end-to-end system degrades with the growing amount of node mobility, or if CSI knowledge remains poor. Simulated curves are in close agreement with the analytical results.

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“…To further improve network coverage and reliability and meanwhile ensure user quality of service, hybrid NOMA [8][9][10][11][12], in which NOMA and OMA can be freely switched, and collaborative NOMA have been studied in the existing works of literature. The authors in [8] use the hybrid NOMA model to minimize the transmission delay of MIMO-mobile edge computing (MEC) in 6G communication networks. The advantageous performance of hybrid NOMA in cognitive radio systems is studied in [9].…”

Section: Introductionmentioning

confidence: 99%

Hybrid NOMA Protocol with Relay Adaptive AF/DF Collaboration and Its Modeling Analysis in NB-IoT

Li,

Gao,

Jia

et al. 2023

Electronics

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In order to meet the demand for large-scale device access in Narrowband Internet of Things (NB-IoT) and to overcome the problem that some resources are wasted due to the use of single decode-and-forward (DF) or amplify-and-forward (AF) collaboration in traditional collaborative communication, this paper introduces a non-orthogonal multiple access (NOMA) and orthogonal multiple access (OMA) hybrid access method into the NB-IoT and proposes a new Hybrid NOMA transmission protocol with relay adaptively selectable collaboration, which is represented as an algorithm. Based on this protocol, we classify the whole transmission process into five states after deriving the outage probability of each link. We then consider the system as a discrete-time Markov model, the closed expressions of the system outage probability and throughput are derived based on the system steady-state probability. In order to improve the system’s reliability, we further optimize the above protocol by allowing the source node to retransmit the unsuccessful received superimposed signals a limited number of times. Numerical results and simulations show that the outage probability is lower when multiple retransmissions are possible. The proposed relay adaptive collaborative hybrid NOMA transmission protocol has advantages over the pure OMA transmission mode.

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Hybrid NOMA based MIMO offloading for mobile edge computing in 6G networks

Cited by 21 publications

References 0 publications

Performance Enhancement of Cooperative MIMO-NOMA Systems Over Sub-6 GHz and mmWave Bands

Performance Enhancement of Cooperative MIMO-NOMA Systems Over Sub-6 GHz and mmWave Bands

Investigation of Vehicular S-LSTM NOMA Over Time Selective Nakagami-m Fading with Imperfect CSI

Hybrid NOMA Protocol with Relay Adaptive AF/DF Collaboration and Its Modeling Analysis in NB-IoT

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