Secrecy-Enhancing Design for Cooperative Downlink and Uplink NOMA With an Untrusted Relay

Lv, Lu; Jiang, Hai; Ding, Zhiguo; Yang, Long; Chen, Jian

doi:10.1109/tcomm.2019.2960345

Cited by 93 publications

(74 citation statements)

References 53 publications

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“…Considering the benchmark schemes, it can be verified that the proposed scheme can offer an overall uplink/downlink ESSR scaling gain of ln ρ, a downlink ESSR scaling gain of 1 4 ln ρ over the adaptive downlink one-way relaying NOMA network proposed in [48] with cooperative jamming and a scaling gain 1 2 ln ρ over the same system without cooperative jamming whereas it can offer the same uplink ESSR scaling gain of 1 4 ln ρ over the scheme proposed in [18]. This means that the proposed system can achieve an overall uplink/downlink ESSR scaling gain of 1 8 ln ρ over the adaptive uplink/downlink one-way relaying NOMA network proposed in [48] with the least utilization of resources.…”

Section: Remarkmentioning

confidence: 92%

“…is out of the eavesdropping capability. Different from [46,48], the proposed scheme confirms achieving a secure performance mode to the premier uplink symbol, i.e., x N U , while completing an uplink/downlink communication in only two time slots.…”

Section: Ergodic Secrecy Sum Rate (Essr)mentioning

confidence: 95%

“…Content may change prior to final publication. transmission [48] 2 ). To this end, the UR may try to intercept confidential information exchanged between nodes during uplink/downlink communications for its own sake.…”

Section: System Model and Designmentioning

confidence: 99%

“…As such, we have considered in the first phase the overestimated capability of eavesdropping at the UR which provides a performance lower bound for the proposed system [8,48].…”

Section: A First Phasementioning

confidence: 99%

“…As the emitting of AN-jamming signal may degrade the eavesdropping capability of the UR, it may cause a simultaneous degradation in the reception quality of the other elements of the network. To overcome this issue, a novel secrecy-enhancing design for cooperative uplink/downlink NOMA with an UR was proposed in [48] where the near and far users send an adaptive jamming signal of a similar symbol structure. Thus, enabling legitimate users to cancel out the jamming signal while preventing the UR from eavesdropping.…”

Section: Introductionmentioning

confidence: 99%

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Secrecy Enhancement of Cooperative NOMA Networks With Two-Way Untrusted Relaying

et al. 2020

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The two-way relaying (TWR) technique has been confirmed to achieve higher spectral efficiency and average sum rate compared with the one-way relaying (OWR) technique in ultra-dense next generation networks with limited spectal resources. In this paper, an enhanced secrecy cooperative TWR scheme for cooperative non-orthogonal multiple access (NOMA) networks against untrusted relaying is highlighted. Specifically, with the application of NOMA principle, a base station (Bs) communicates with two trusted users, i.e., namely a near and a far users, where the communication with the far user takes place only via an untrusted relay (UR) employing both TWR and analog network coding (ANC) mechanisms. To minimize information leakage at the UR, the far user transmits its uplink signal simultaneously with Bs's downlink signal to confuse the eavesdropping capability of the UR by increasing inter-user interference (IUI). To investigate the benefits of the proposed scheme, asymptotic lower bound expressions of the ergodic secrecy sum rate (ESSR) of uplink/downlink rates and their scaling law are derived to characterize the secrecy performance. The system parameters have been carefully studied to maitain the desired ESSR performance where we obtain an optimal value for the uplink power sharing coefficient with an arbitrary known value of the downlink one. Analytical and simulation results show that the proposed scheme can achieve scaling gain of 1 8 ln ρ of positive ESSR over the untrusted OWR scheme with adaptive uplink/downlink jamming and a significant gain over the other conventional NOMA uplink/downlink schemes in two time slots of communication.

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Section: Remarkmentioning

confidence: 92%

Section: Ergodic Secrecy Sum Rate (Essr)mentioning

confidence: 95%

Section: System Model and Designmentioning

confidence: 99%

“…As such, we have considered in the first phase the overestimated capability of eavesdropping at the UR which provides a performance lower bound for the proposed system [8,48].…”

Section: A First Phasementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Secrecy Enhancement of Cooperative NOMA Networks With Two-Way Untrusted Relaying

et al. 2020

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Cooperative NOMA

Xu,

Li,

Zhao

et al. 2024

Next Generation Multiple Access

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Performance analysis of non‐orthogonal multiple access assisted cooperative relay system with channel estimation errors and imperfect successive interference cancellation

Singh

Bansal

2021

Trans Emerging Tel Tech

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This article studies a new non-orthogonal multiple access (NOMA) assisted decode-and-forward cooperative relay (NOMA-DFCR) system, where the downlink NOMA principle is employed to communicate between a source-destination pair through a dedicated relay. Performance of the proposed system is analyzed in terms of the outage probability (OP), system throughput (ST), and ergodic sum rate with channel estimation errors (CEEs) and imperfect successive interference cancellation (SIC). An approximate expression of the OP and the diversity order of the presented scheme are derived. To gain further insights, asymptotic analysis of the OP is carried out at high signal-to-noise ratio (SNR) regime. Further, we also investigate the impact of power allocation coefficients and CEEs on the system performance. Moreover, the OP of orthogonal multiple access (OMA) assisted cooperative relay system is evaluated and compared with the proposed scheme. To validate the correctness of the derived analytical results, Monte Carlo simulations are performed. Numerical and simulation results have shown that the proposed system outperforms its OMA counterpart and the schemes in References 14 and 15, in terms of both the ST and OP.

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Secrecy-Enhancing Design for Cooperative Downlink and Uplink NOMA With an Untrusted Relay

Cited by 93 publications

References 53 publications

Secrecy Enhancement of Cooperative NOMA Networks With Two-Way Untrusted Relaying

Secrecy Enhancement of Cooperative NOMA Networks With Two-Way Untrusted Relaying

Cooperative NOMA

Performance analysis of non‐orthogonal multiple access assisted cooperative relay system with channel estimation errors and imperfect successive interference cancellation

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