Joint Relay Selection, Full-Duplex and Device-to-Device Transmission in Wireless Powered NOMA Networks

Dang, Huu-Phuc; Nguyen, Minh-Sang Van; Do, Dinh‐Thuan; Pham, Hong-Lien; Selim, Bassant; Kaddoum, Georges

doi:10.1109/access.2020.2991847

Cited by 35 publications

(27 citation statements)

References 35 publications

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“…In recent years, a plethora of studies have emerged that show the importance of employing NOMA in wireless networks. In this regard, a NOMA network for cooperative communications is investigated in [10]. In such NOMA networks, amplify and forward (AF) and decode and forward (DF) modes are implemented to provide signal processing at the relay.…”

Section: A Related Workmentioning

confidence: 99%

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Performance Evaluation of Relay-Aided CR-NOMA for Beyond 5G Communications

Nguyen

Jameel

et al. 2020

IEEE Access

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Non-orthogonal multiple access (NOMA) is considered as one of the most promising technologies to handle the issue of spectrum scarcity in beyond fifth-generation (5G) networks. Integrating NOMA in cognitive radio (CR) network is expected to usher a new era of reliable, seamless, and massive connectivity. In this regard, this work explores the relay selection problem in CR networks when operating in the spectrum sharing model. Specifically, the secondary users (SUs) in the CR-NOMA network opportunistically access the licensed spectrum resources to boost the number of accessible SUs sharing the limited and dynamic spectrum resources. Moreover, to improve the performance of far users, partial relay selection architecture is exploited at full-duplex (FD) and half duplex (HD) relays for both uplink and downlink communications. For in-depth performance evaluation, we provide closed-form expressions of the outage probabilities of the users in FD and HD relay-aided CR-NOMA networks. In addition to this, the analytical expressions of asymptotic outage probabilities and ergodic capacity are also provided which unveils the critical factors affecting the performance of CR-NOMA networks. To validate the derived expressions, extensive simulations are performed that demonstrate the accuracy of analytical expressions for FD and HD relay-aided CR-NOMA networks. INDEX TERMS Cognitive radio network, full-duplex, relay selection, Non-orthogonal multiple access (NOMA).

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Section: A Related Workmentioning

confidence: 99%

“…Then, by substituting τ 1 = τ 2 = 0 in (10) and (11), the exact outage probability of G 2 under perfect SIC (psic) can be obtained as…”

Section: ) Outage Probability Of G1mentioning

confidence: 99%

Performance Evaluation of Relay-Aided CR-NOMA for Beyond 5G Communications

Nguyen

Jameel

et al. 2020

IEEE Access

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“…To maximize the sum throughput in multi-user FD systems, sub-optimal precoding and power allocation algorithm are studied in [21]. In other work, maximization of the overall throughput in such a FD relay network was investigated by enabling FD design in some kinds of networks [22], [23]. The other potential benefits in NOMA deploying FD relays can be found in [24]- [26].…”

Section: Introductionmentioning

confidence: 99%

UAV Relaying Enabled NOMA Network With Hybrid Duplexing and Multiple Antennas

Nguyen

et al. 2020

IEEE Access

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This paper studies the wireless systems by implementing the full-duplex (FD) unmanned aerial vehicle (UAV) relay to allow two nearby base stations joint communicate to distant users. The nonorthogonal multiple access (NOMA) assisted networks and design of multiple-antenna users are considered in order to improve the users' performance. To overcome obstacles in transmission environment, such a model of the uplink (UL) and the downlink (DL) relying on UAV relay is suitable to forward signals to far users. Moreover, practical scenario of imperfect successive interference cancellation (SIC) at each receiver is considered as main reason of degraded performance. To evaluate specific performance metric, we derive the closed-form expressions of outage probability. In addition, the throughput in delay-limited transmission mode of UAV relay assisted UL/DL NOMA system is also considered thoroughly. The derivations and results showed that the higher number of antennas at users could effectively improve the system throughput and reduce the outage probability. The numerical simulation results further indicate the effectiveness of the proposed system and the correctness of theoretical analysis. INDEX TERMS Non-orthogonal Multiple Access, Unmanned Aerial Vehicle, outage probability, throughput, full-duplex, imperfect SIC.

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“…Guo et al [ 27 ] investigated a NOMA relay system, where the energy-limited FD near user harvest energy from the source then acts as a relay to forward the decoded signal to the far user. Dang et al [ 28 ] proposed three FD cooperative relaying NOMA scheme for device-to-device (D2D) communications and evaluate the proposed schemes through the closed-form outage probability and throughput expressions. However, the authors did not consider interference from the transmitted relay to the near user.…”

Section: Introductionmentioning

confidence: 99%

Outage Probability and Ergodic Capacity of a Two-User NOMA Relaying System with an Energy Harvesting Full-Duplex Relay and Its Interference at the Near User

Toan

Hoang

Duy

2020

Sensors

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In this paper, we consider a two-user downlink full-duplex (FD) non-orthogonal multiple access (NOMA) relay system where the FD relay uses an energy harvesting (EH) technique to assist the communication between the base station and far user over flat, independent and non-identically Rayleigh fading channels. Importantly, since the relay operates in FD mode, we take into account the effect of the interference caused by relay on the near user. Considering this EH-FD-NOMA relay system, we derive the exact mathematical expressions of the outage probabilities and ergodic capacities of near and far users. Monte–Carlo simulations verify the accuracy of our analytical method. Numerical results provided in this paper allow system designers to clearly see not only the impacts of the power distribution factor and the self-interference cancellation capacity of the relay but also the influence of the strength of inter-user interference at the near user on the outage performances and ergodic capacities of both users.

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Joint Relay Selection, Full-Duplex and Device-to-Device Transmission in Wireless Powered NOMA Networks

Cited by 35 publications

References 35 publications

Performance Evaluation of Relay-Aided CR-NOMA for Beyond 5G Communications

Performance Evaluation of Relay-Aided CR-NOMA for Beyond 5G Communications

UAV Relaying Enabled NOMA Network With Hybrid Duplexing and Multiple Antennas

Outage Probability and Ergodic Capacity of a Two-User NOMA Relaying System with an Energy Harvesting Full-Duplex Relay and Its Interference at the Near User

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