Enhancing the Physical Layer Security of Non-Orthogonal Multiple Access in Large-Scale Networks

By Yuanwei Liu, Zhijin Qin, Maged Elkashlan, Yue Gao, Lajos Hanzo. IEEE Transactions on Wireless Communications, 2016

553 citations recorded by the source corpus.

This paper investigates the physical layer security of non-orthogonal multiple access (NOMA) in large-scale networks with invoking stochastic geometry. Both single-antenna and multiple-antenna aided transmission scenarios are considered, where the base station (BS) communicates with randomly distributed NOMA users. In the single-antenna scenario, we adopt a protected zone around the BS to establish an eavesdropper-exclusion area with the aid of careful channel ordering of the NOMA users. In the multiple-antenna scenario, artificial noise is generated at the BS for further improving the security of a beamforming-aided system. In order to characterize the secrecy performance, we derive new exact expressions of the security outage probability for both single-antenna and multiple-antenna aided scenarios. For the single-antenna scenario, we perform secrecy diversity order analysis of the selected user pair. The analytical results derived demonstrate that the secrecy diversity order is determined by the specific user having the worse channel condition among the selected user pair. For the multiple-antenna scenario, we derive the asymptotic secrecy outage probability, when the number of transmit antennas tends to infinity. Monte Carlo simulations are provided for verifying the analytical results derived and to show that: 1) the security performance of the NOMA networks can be improved by invoking the protected zone and by generating artificial noise at the BS and 2) the asymptotic secrecy outage probability is close to the exact secrecy outage probability.

Subfields: Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/2811a33f01ef06ebab1e090f9159f1a53dab84db

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Citations in the corpus

Exploiting Full/Half-Duplex User Relaying in NOMA Systems (2018, methodology): “With the emphasis on physical layer security, in [19], authors have adopted two effective approaches, namely protected zone and artiﬁcial noise for enhancing the secrecy performance of NOMA networks with the aid of stochastic geometry.”
A Survey of Physical Layer Security Techniques for 5G Wireless Networks and Challenges Ahead (2018, methodology): “ation policy which maximizes the secrecy sum rate under each user’s QoS constraint is derived. For the same CSI assumption, Y. Liu et al. further investigate the secure transmission for NOMA networks [86], as shown in Fig. 6. An eavesdropper-exclusion zone is established. To reduce the SIC complexit”
Exploiting Intelligent Reflecting Surfaces in NOMA Networks: Joint Beamforming Optimization (2019, background): “[25] analyzed the secrecy performance with stochastic geometry in both single-antenna and multiple-antenna scenarios.”
A Survey of Multi-Access Edge Computing in 5G and Beyond: Fundamentals, Technology Integration, and State-of-the-Art (2019, unknown): “To address the scenario with external eavesdroppers, the physical layer security can be utilized to cope with this challenge for the NOMA-MEC system [86], [87].”
Residual Transceiver Hardware Impairments on Cooperative NOMA Networks (2020, background): “With the emphasis on physical layer security, [9] investigated the secrecy performance of large-scale NOMA networks, where both single-antenna and multiple-antenna assisted transmission scenarios were considered.”
Classifications and Applications of Physical Layer Security Techniques for Confidentiality: A Comprehensive Survey (2019, methodology): “In [247], the PLS of NOMA in large-scale networks was investigated by using stochastic geometry, where both single-antenna and multiple-antenna base station scenarios are considered.”
Physical-Layer Security of 5G Wireless Networks for IoT: Challenges and Opportunities (2019, unknown): “[59] investigated the secrecy performance of large-”
Security and Privacy for 6G: A Survey on Prospective Technologies and Challenges (2021, background): “The other open challenge is to detect cooperative eavesdroppers, where several eavesdroppers cooperate to wiretap a wireless channel or perform active attacks (PCA) against the base stations [113], [114].”
Reconfigurable Intelligent Surfaces: Principles and Opportunities (2020, background): “the homogeneous Poisson point process (HPPP) [47], [48], the Poisson cluster process (PCP) [49], [50], the Binomial point process (BPP) as well as the Hard core point process (HCPP) [51].”
Nonorthogonal Multiple Access for 5G and Beyond (2017, background): “Motivated by the security concerns of wireless communications, PLS measures have also been proposed for NOMA networks in order to combat eavesdropping [111], [139], [139], [214]–[216].”