Enhancing the Physical Layer Security of Uplink Non-Orthogonal Multiple Access in Cellular Internet of Things

Zhang, Shuai; Xu, Xiaoming; Wang, Huiming; Peng, Jianhua; Zhang, Di; Huang, Kaizhi

doi:10.1109/access.2018.2875118

Cited by 20 publications

(7 citation statements)

References 37 publications

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“…2 shows the coverage probabilities of AU for different values of AU's altitudes. As it is seen, our analytical results match the simulation results closely, which verifies the accuracy of ( 30)- (31). Using ( 30)-( 31), we find that AU's altitude plays an important role in determining the coverage probability.…”

Section: Simulation and Analytical Resultssupporting

confidence: 78%

Interference-Aware NOMA for Cellular-Connected UAVs: Stochastic Geometry Analysis

Leow

Navaie

Sun

et al. 2021

IEEE J. Select. Areas Commun.

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Efficiency of cellular-connected UAVs is challenged by spectrum inefficiency, limited number of concurrent connectivity, and strong interference. To overcome these issues, in this paper, we study the performance of downlink non-orthogonal multiple access for cellular-connected UAVs. We develop a novel framework based on stochastic geometry for the co-existence of aerial users (AUs) and terrestrial users (TUs), where the spatial distribution of the base stations (BSs) follows a Poisson Point Process. In our analysis, two user association policies and two types of receive antennas are considered while an intercell interference coordination (ICIC) technique is also in place. As the main performance measures, we then analytically derive the coverage probability and average rate of AUs and TUs. These derivations are then used to provide quantitative insights on the impact of different system parameters and settings including AU's altitude, TU's distance from the BS, power allocation, successive interference cancellation (SIC) constraints, user association policy, antenna beamwidth, and the number of coordinated BSs. Based on our analysis we then propose an interference-aware scheme based on maximum-SINR user association, directional antenna, and ICIC. A benchmark scheme based on minimum-distance user association, omni-directional antenna, and without ICIC is considered. Compared to the benchmark scheme, our proposed scheme improves the AU's coverage probability by threefold and TU's average rate by sixfold. Compared to the orthogonal multiple access, our proposed scheme trades off a slight reduction in the AU's coverage probability (~1%) with a significant increase in the achieved rate of the TUs (603Kbps/resource block).

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Section: Simulation and Analytical Resultssupporting

confidence: 78%

Interference-Aware NOMA for Cellular-Connected UAVs: Stochastic Geometry Analysis

Leow

Navaie

Sun

et al. 2021

IEEE J. Select. Areas Commun.

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“…Moreover, those literature addressed the secure problems from DL NOMA. In contrast with [27], where users were paired and NOMA was carried out between the pair, our UL NOMA system has more generality that all users carry out NOMA, gaining higher spectral efficiency and more connectivity accommodation. Furthermore, full-duplex BS jamming is adopted to enhance security in [27], whereas we employ the weakest users' jamming, on one hand to improve the strongest users' secrecy performance (in turn improve the overall secrecy performance), on the other hand to avoid these users revealing secrecy message (being eavesdropped).…”

Section: B Motivation and Contributionsmentioning

confidence: 99%

“…Different from keyless physical security in above secure UL NOMA, [26] proposed an uplink chaos NOMA transmission scheme which is based on a common key encryption to realize a secure and large-capacity uplink transmission. In addition to the inherent intra-cluster interference in NOMA, the authors [27] studied the physical layer security of UL NOMA for cellular internet of things, where inter-cell interference was also taken into account. In [28], a computation efficiency maximization problem was studied in NOMA-enabled mobile edge computing (MEC) networks.…”

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confidence: 99%

Jamming-Aided Secrecy Performance in Secure Uplink NOMA System

2020

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A novel secrecy scenario of uplink non-orthogonal multiple access (NOMA) along with cooperative jammer(s) to improve secrecy performance is studied in this work. We first characterize secrecy performance in terms of positive secrecy rate probability, secrecy outage probability (SOP) and effective secrecy throughput (EST), and derive the closed-expressions of individual secrecy performance. The analytical results not only show an improvement on secrecy performance with the aid of cooperative jamming, but also clearly illustrate how each jammer affects the secrecy performance. We then continue the study of the individual secrecy performance for its asymptotic behaviors, and reveal it is only dependent on its relative distance to the eavesdropper over the desired receiver in a high signal-to-noise ratio (SNR) regime. Finally, the maximization of overall secrecy performance is covered by investigating two optimization problems: 1) optimal selection of jammer(s) under the same transmit power; 2) optimal power allocation to each transmitter, including jammers, under the constraint of limited total transmit power. The solutions to these two problems are presented and demonstrated by an appropriate case. INDEX TERMS Cooperative jamming, non-orthogonal multiple access (NOMA), successive interference cancellation (SIC), secrecy performance, zero-forcing (ZF). I. INTRODUCTION A. BACKGROUND

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“…Substituting (15) into (18), we approximate the SOP of the K-th transmission by its lower bound, as follows:…”

Section: System Model Of Secure Harq-ccmentioning

confidence: 99%

“…As another important metric, the widely discussed secrecy throughput presented the average reliable and secure rate during each transmission [8][9][10]. Moreover, signal-processing methods, e.g., beamforming and artificial noise, efficiently enhanced the secrecy performance [11][12][13][14][15][16][17][18]. It was also proposed that diversity technologies had their special functions in PLS, including multi-input multi-output (MIMO) diversity and multi-user diversity [19].…”

Section: Introductionmentioning

confidence: 99%

Quasi-concave optimization of secrecy redundancy rate in HARQ-CC system

Wu¹,

Yin²,

Zhou³

et al. 2020

Sci. China Inf. Sci.

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In a hybrid automatic repeat request with chase combining (HARQ-CC) system, we analyze physical layer secure performance and determine the secrecy redundancy rate by proposed quasi-concave optimization methods with effective secrecy throughput (EST) criteria. First, key performance metrics, including connection outage probability (COP), secrecy outage probability (SOP), EST, and delay, are discussed. Then, under the constraint of COP, we optimize the secrecy redundancy rate to maximize the EST, which is a quasi-concave function, by both the bisection and fixed-point methods. Furthermore, under the simultaneous constraints of COP and SOP, the bisection and Lagrangian multiplier methods are applied to optimize the secrecy redundancy rate. From the comparison of the numerical and simulated results, it is concluded that EST demonstrates practical secure performance of HARQ-CC, and the proposed optimization methods adjust the secrecy redundancy rate for improved security.

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Enhancing the Physical Layer Security of Uplink Non-Orthogonal Multiple Access in Cellular Internet of Things

Cited by 20 publications

References 37 publications

Interference-Aware NOMA for Cellular-Connected UAVs: Stochastic Geometry Analysis

Interference-Aware NOMA for Cellular-Connected UAVs: Stochastic Geometry Analysis

Jamming-Aided Secrecy Performance in Secure Uplink NOMA System

Quasi-concave optimization of secrecy redundancy rate in HARQ-CC system

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