Secure Cooperative Communications With an Untrusted Relay: A NOMA-Inspired Jamming and Relaying Approach

Lv, Lu; Zhou, Fuhui; Chen, Jian; Al-Dhahir, Naofal

doi:10.1109/tifs.2019.2912337

Cited by 85 publications

(57 citation statements)

References 52 publications

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“…Different from [12]- [14], where the jammers are fixed for emitting AN, the jammers in this work are dynamically selected, and switched into their original role of transmitters if the qualities of channels become better. Our secure NOMA network modeled is also distinct from [23], where the users with stronger channel condition act as relays to help users with weaker channel condition.…”

Section: B Motivation and Contributionsmentioning

confidence: 99%

“…A novel beamforming design was proposed in [11] to enhance physical layer security of a NOMA system with the aid of artificial noise (AN). The benefit from AN inspired researchers to contribute more work [12]- [16], where AN-assisted NOMA can be divided into two categories according to emitting source, one emitting AN from the same transmitter along with desired signals [15], [16], the other emitting AN from the third-party, e.g., relays in cooperative NOMA [12]- [14]. The fundamental functions of relays in cooperative NOMA are forwarding signals.…”

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confidence: 99%

“…Both decode-and-forward (DF) and amplify-and-forward (AF) protocols in cooperative NOMA were naturally considered in [17], [18]. Another concern with cooperative NOMA is the selection of relays, i.e., relay schemes [14], [18]. Meanwhile, a large number of references combined NOMA with the cognitive radio (CR) network to further achieve spectral efficiency and security [19]- [22].…”

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confidence: 99%

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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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Section: B Motivation and Contributionsmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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Jamming-Aided Secrecy Performance in Secure Uplink NOMA System

2020

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“…Due to the open nature of wireless channels, cooperative NOMA systems offer new possibilities and opportunities for security challenge. Recently, emerging as promising solutions to against eavesdropping and guarantee secure transmission, physical layer security techniques have attracted considerable attention and applied in cooperative NOMA systems [12][13][14][15][16][17][18]. In [12], the authors considered both amplify-and-forward (AF) and decode-and-forward (DF) protocols, and derived analytical expressions for secrecy outage probability (SOP) and secrecy capacity.…”

Section: Introductionmentioning

confidence: 99%

“…To maximize the capacity of the systems, a secure two-way relay selection method was proposed for multiple relays networks with two pairs of cellular users [13]. In the work of [14], a novel NOMA-inspired jamming and relaying scheme has been developed to enhance the physical layer security of untrusted relay networks. In [15], an artificial noise (AN)-aided cooperative jamming scheme for multi-input single-output NOMA Cognitive radio networks (CRNs) using simultaneous wireless information and power transfer technology has been proposed to improve the security of the primary network.…”

Section: Introductionmentioning

confidence: 99%

Cooperative Secure Transmission in MISO-NOMA Networks

Chen¹,

Zhang²,

Li³

2020

Electronics

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In this paper, we investigate cooperative secure transmission in non-orthogonal multiple access (NOMA) networks where a source (Alice) intends to transmit confidential messages to one legitimate user with high-level security requirement (LU1), and serve another normal one (LU2) simultaneously. In order to enhance the transmission security, a cooperative jammer (Charlie) is employed to confuse multiple non-colluding eavesdroppers (Eves). Taking both secrecy outage restriction of LU1 and the desired quality of service (QoS) requirement of LU2 into consideration, we propose an adaptive power allocation strategy for maximizing secrecy rate. Numerical results are provided to validate that our proposed scheme significantly outperforms the conventional NOMA secure transmission scheme.

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