Secrecy Outage Analysis for Cooperative NOMA Systems With Relay Selection Schemes

Lei, Hongjiang; Yang, Zixuan; Park, Kihong; Ansari, Imran Shafique; Guo, Yongcai; Pan, Gaofeng; Alouini, Mohamed‐Slim

doi:10.1109/tcomm.2019.2916070

Cited by 121 publications

(70 citation statements)

References 52 publications

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“…Remark 3. Up on substituting (38) and (39) into (34), the secrecy diversity orders of the n-th user with ipSIC/pSIC for PD-NOMA are equal to zero and one, respectively.…”

Section: Secrecy Diversity Order Analysismentioning

confidence: 99%

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Secure Communications in a Unified Non-Orthogonal Multiple Access Framework

Yue

Liu

Yao

et al. 2020

IEEE Trans. Wireless Commun.

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This paper investigates the impact of physical layer secrecy on the performance of a unified non-orthogonal multiple access (NOMA) framework, where both external and internal eavesdropping scenarios are examined. The spatial locations of legitimate users (LUs) and eavesdroppers are modeled by invoking stochastic geometry. To characterize the security performance, new exact and asymptotic expressions of secrecy outage probability (SOP) are derived for both code-domain NOMA (CD-NOMA) and power-domain NOMA (PD-NOMA), in which imperfect successive interference cancellation (ipSIC) and perfect SIC (pSIC) are taken into account. For the external eavesdropping scenario, the secrecy diversity orders by a pair of LUs (the n-th user and m-th user) for CD/PD-NOMA are obtained. Analytical results make known that the diversity orders of the n-th user with ipSIC/pSIC for CD-NOMA and PD-NOMA are equal to zero/K and zero/one, respectively. The diversity orders of the m-th user are equal to K/one for CD/PD-NOMA. For the internal eavesdropping scenario, we examine the analysis of secrecy diversity order and observe that the m-th user to wiretap the n-th user with ipSIC/pSIC for CD-NOMA and PD-NOMA provide the diversity orders of zero/K and zero/one, respectively, which is consistent with external eavesdropping scenario. Numerical results are present to confirm the accuracy of the analytical results developed and show that: i) The secrecy outage behavior of the n-th user is superior to that of the m-th user; ii) By increasing the number of subcarriers, CD-NOMA is capable of achieving a larger secrecy diversity gain compared to PD-NOMA.

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“…Remark 3. Up on substituting (38) and (39) into (34), the secrecy diversity orders of the n-th user with ipSIC/pSIC for PD-NOMA are equal to zero and one, respectively.…”

Section: Secrecy Diversity Order Analysismentioning

confidence: 99%

“…In the presence of external eavesdroppers (Eves), the authors of [37] highlighted the security features of AF based two-way NOMA networks by exploiting subcarriers and user scheduling. In addition, the authors in [38] investigated the secrecy outage performance of multiple-relays assisted NOMA with invoking the relay selection schemes.…”

Section: Introductionmentioning

confidence: 99%

Secure Communications in a Unified Non-Orthogonal Multiple Access Framework

Yue

Liu

Yao

et al. 2020

IEEE Trans. Wireless Commun.

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“…Therefore, D m should first detect the signals from D j (j < m) before decoding its own signal. Hence, the SIDNR of D m when decoding D k 's message (k ≤ m) given in (23), as shown at the bottom of the previous page and the corresponding achievable data rate is evaluated as…”

Section: B Outage Performancementioning

confidence: 99%

“…In the same context, a more recent study [22] considered one source, two destination users and one eavesdropper in the analysis of secure performance under different antenna selection schemes. In addition, in [23], assuming the decode-and-forward (DF) protocol, different relay selection schemes were investigated to improve the secure outage performance. In [24], the secrecy outage probability over Rayleigh fading channels was analyzed for a 2 users cooperative NOMA system, considering both the amplify-and-forward (AF) and DF protocols.…”

Section: Introductionmentioning

confidence: 99%

Effects of Residual Hardware Impairments on Secure NOMA-Based Cooperative Systems

Selim

Muhaidat

et al. 2020

IEEE Access

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Non-orthogonal multiple access (NOMA) has been proposed as a promising technology that is capable of improving the spectral efficiency of fifth-generation wireless networks and beyond. However, in practical communication scenarios, transceiver architectures inevitably suffer from radio frequency (RF) front-end related impairments that cause non-negligible performance degradation. This issue can be addressed by analog and digital signal processing algorithms, however, inevitable aspects of this approach such as time-varying hardware characteristics and imperfect compensation schemes result to detrimental residual distortions. In the present contribution we investigate the physical layer security of NOMA-based amplify-and-forward relay systems under such realistically incurred residual hardware impairment (RHI) effects. Exact and asymptotic analytic expressions for the corresponding outage probability (OP) and intercept probability (IP) of the considered setup over multipath fading channels are derived and corroborated by respective simulation results. Based on this, it is shown that RHI affects both the legitimate users and eavesdroppers by increasing the OP and decreasing the IP. For a fixed OP, RHI generally increases the corresponding IP, thereby reducing the secure performance of the system. Further interesting insights are provided, verifying the importance of the offered results for the effective design and deployment of secure cooperative communication systems. INDEX TERMS Intercept probability, non-orthogonal multiple access, outage probability, physical layer security, residual hardware impairments.

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“…The authors in [20] evaluated the security and reliability of downlink cooperative NOMA in cognitive networks. In view of the multiple-relay assisted NOMA system, there are three relay selection schemes, i.e., optimal single relay selection (OSRS) scheme, twostep single relay selection (TSRS) scheme and optimal dual relay selection (ODRS) scheme were proposed to studied the secrecy outage performance of the considered system [21]. In order to improve the secure performance of the system, the authors proposed a cooperative jamming strategy for confuse relays in [21], and verified that the transmission power and fading parameters have a certain impact on the secure performance.…”

Section: Introduction a Backgroundmentioning

confidence: 99%

Physical Layer Security of Cooperative NOMA for IoT Networks Under I/Q Imbalance

Zhao

Gao

et al. 2020

IEEE Access

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In this paper, we investigate the reliability and security of cooperative dual-hop non-orthogonal multiple access (NOMA) for internet-of-thing (IoT) networks, in which the transceivers consider a detrimental factor of in-phase and quadrature-phase imbalance (IQI). The communication between the source and destination is accomplished through a decode-and-forward (DF) relay in the presence of an eavesdropper. In order to characterize the performance of the considered system, exact analytical expressions for the outage probability (OP) and intercept probability (IP) are derived in closed-form. Furthermore, to better understanding the performance of the considered system, we further derive the asymptotic expressions of OP in the high signal-to-noise ratio (SNR) regime and IP at the high main eavesdropping ratio (MER) region. A large number of analysis and Monte Carlo simulation results show that the existence of IQI usually increases the corresponding OP and reduces the IP, which means that reduces the reliability of the system and improves the security. In addition, the provided results provide useful insights into the trade-off between reliability and security of secure cooperative communication systems. INDEX TERMS Cooperative communication, in-phase and quadrature-phase imbalance, Internet-of-Things, physical layer security, non-orthogonal multiple access.

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Secrecy Outage Analysis for Cooperative NOMA Systems With Relay Selection Schemes

Cited by 121 publications

References 52 publications

Secure Communications in a Unified Non-Orthogonal Multiple Access Framework

Secure Communications in a Unified Non-Orthogonal Multiple Access Framework

Effects of Residual Hardware Impairments on Secure NOMA-Based Cooperative Systems

Physical Layer Security of Cooperative NOMA for IoT Networks Under I/Q Imbalance

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