Joint User and Relay Selection for Cooperative NOMA Networks

Deng, Dan; Fan, Lisheng; Lei, Xianfu; Tan, Weiqiang; Xie, Dongqing

doi:10.1109/access.2017.2751503

Cited by 60 publications

(44 citation statements)

References 27 publications

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“…Authors demonstrated that the significant performance gain can be achieved by increasing the number of relays when compared to OMA one. Deng et al [111] investigated the joint user and relay selection problem in cooperative NOMA relay networks, where multiple source users communicate with two destination users via multiple AF relays. In order to improve the system performance, the authors proposed an optimal relay selection scheme, where the best user-relay pair was selected.…”

Section: Cooperative Nomamentioning

confidence: 99%

A Tutorial on Nonorthogonal Multiple Access for 5G and Beyond

Aldababsa

Toka

Gökçeli

et al. 2018

Wireless Communications and Mobile Computing

253

168

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Today's wireless networks allocate radio resources to users based on the orthogonal multiple access (OMA) principle. However, as the number of users increases, OMA based approaches may not meet the stringent emerging requirements including very high spectral efficiency, very low latency, and massive device connectivity. Nonorthogonal multiple access (NOMA) principle emerges as a solution to improve the spectral efficiency while allowing some degree of multiple access interference at receivers. In this tutorial style paper, we target providing a unified model for NOMA, including uplink and downlink transmissions, along with the extensions to multiple input multiple output and cooperative communication scenarios. Through numerical examples, we compare the performances of OMA and NOMA networks. Implementation aspects and open issues are also detailed.

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Section: Cooperative Nomamentioning

confidence: 99%

A Tutorial on Nonorthogonal Multiple Access for 5G and Beyond

Aldababsa

Toka

Gökçeli

et al. 2018

Wireless Communications and Mobile Computing

253

168

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“…1) Outage probability at D 1 : An outage event occurs at D 1 when its instantaneous received E2E SINR, given as in (10), falls below the threshold τ . Thus, the outage probability at user D 1 is given as (15) where k * refers to the index of the selected relay, according to the criterion in (13). From (15), an exact analytical expression for the outage probability of D 1 is obtained, as shown next Proposition 1.…”

Section: A Exact Analysismentioning

confidence: 99%

“…Recently, the use of NOMA in cooperative 5G deployment scenarios has received a lot of attention, owing to the inherent gains of such cooperative relaying strategies regarding coverage extension and reliability [9][10][11][12][13][14][15][16][17]. In cooperative relaying networks, a relay node assists the communication between a source and a destination to improve the transmission range or to improve the reliability by leveraging spatial diversity [6].…”

mentioning

confidence: 99%

“…In [14], the performance in terms of the outage probability and sum rate for a NOMA scheme in a cooperative network with multiple HD-AF relays were studied, considering partial relay selection (PRS). In [15], the outage probability for an optimal user-relay pair selection scheme, which maximizes the quality of service in a NOMA scenario, was investigated. In [16], the performance in terms of the outage probability for different relay selection schemes, considering a NOMAbased cooperative network scenario with multiple HD-DF relays, was analyzed.…”

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confidence: 99%

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Performance Analysis of Full-Duplex Relay-Aided NOMA Systems Using Partial Relay Selection

Tregancini

Olivo

Osorio

et al. 2020

IEEE Trans. Veh. Technol.

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Capitalizing on the benefits of non-orthogonal multiple access (NOMA) and full-duplex relaying as key technologies to boost spectral efficiency in the next generation of wireless communications, herein we investigate the performance of a cooperative network in which a source communicates with two destinations via one node selected from a set of full-duplex amplify-and-forward relays. For this purpose, a power-domain NOMA scheme is used to transmit information from the source to the destinations, and partial relay selection is performed to choose the relay based on the channel state information of the first hops. The system performance is characterized in terms of both the outage probability and the ergodic capacity, for which, exact analytical expressions are derived in integral form. In addition, to reduce the computational complexity of the obtained analytical results, closed-form expressions are derived from lower-bound, approximate, and asymptotic analyses. From these analytical expressions, the impact on the system performance of the number of relays, the power allocation factor between the NOMA destinations, and the residual self-interference at full-duplex relays is assessed. The correctness of our analyses is validated by Monte Carlo simulations, and a comparison with the half-duplex relay-aided NOMA system counterpart is also provided.

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“…To further enhance the physical-layer security of NOMA systems, researchers proposed the spatial selection, such as 2 Wireless Communications and Mobile Computing antenna selection or relay selection [32]. The authors in [33] extended this work into amplify-and-forward (AF) and decode-and-forward (DF) modes and devised a novel relay selection scheme which consists of two stages.…”

Section: Introductionmentioning

confidence: 99%

Impact of Antenna Selection on Physical‐Layer Security of NOMA Networks

Deng

Fan

et al. 2018

Wireless Communications and Mobile Computing

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This paper studies the impacts of antenna selection algorithms in decode-and-forward (DF) cooperative nonorthogonal multiple access (NOMA) networks, where the secure information from the relay can be overheard by an eavesdropper in the networks. In order to ensure the secure transmission, an optimal antenna selection algorithm is proposed to choose one best relay's antenna to assist the secure transmission. We study the impact of antenna selection on the system secure communication through deriving the analytical expression of the secrecy outage probability along with the asymptotic expression in the high regime of signal-tonoise ratio (SNR) and main-to-eavesdropper ratio (MER). From the analytical and asymptotic expressions, we find that the system secure performance is highly dependent on the system parameters such as the number of antennas at the relay, SNR, and MER. In particular, the secrecy diversity order of the system is equal to the antenna number, when the interference from the second user is limited.

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Joint User and Relay Selection for Cooperative NOMA Networks

Cited by 60 publications

References 27 publications

A Tutorial on Nonorthogonal Multiple Access for 5G and Beyond

A Tutorial on Nonorthogonal Multiple Access for 5G and Beyond

Performance Analysis of Full-Duplex Relay-Aided NOMA Systems Using Partial Relay Selection

Impact of Antenna Selection on Physical‐Layer Security of NOMA Networks

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