Cooperative Secure Beamforming for AF Relay Networks With Multiple Eavesdroppers

Yang, Yuli; Li, Qiang; Ma, Wing-Kin; Ge, Jianhua; Ching, P.C.

doi:10.1109/lsp.2012.2227313

Cited by 167 publications

(145 citation statements)

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“…Collaborative communication, for example, with the enrichment of physical layer transmission technology and physical security features, has been paid more and more attention [3]. In collaborative communication, the source point not only can broadcast information directly to the destination node, but can also complete information transmission to the destination node through the assistance of relay nodes, which use diversity gain to effectively overcome multipath fading and improve system performance.…”

Section: Introductionmentioning

confidence: 99%

Joint Resource Allocation in Secure OFDMA-Based Networks Taking a Base Station as a Two-Way Relay

Liu

Zhang

2017

Applied Sciences

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Due to the broadcast nature of wireless media, all nodes in the coverage of a transmitter are capable of capturing its signals, thus wireless transmission is sensitive to wiretapping. Several existing schemes place an emphasis on secrecy rate improvement, under the protocols of amplify-and-forward or decode-and-forward, when there are only relay users in the network. We set up a novel communication model in which normal and two-way relay users coexist in the same cell, taking the base station as a relay. Our objective is to maximize the total secrecy rate, taking subcarrier pairing, subcarrier assignment and power allocation into account, when there is one eavesdropper in one cell of the cellular network. Although this problem is very intricate, we reformulate it as a convex optimization problem by means of Lagrange duality. In order to reduce the computational complexity, equal power allocation is proposed. Lastly, the experimental results show the proposed resource allocation scheme can obtain a higher secrecy rate than traditional schemes.

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Section: Introductionmentioning

confidence: 99%

Joint Resource Allocation in Secure OFDMA-Based Networks Taking a Base Station as a Two-Way Relay

Liu

Zhang

2017

Applied Sciences

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“…However, due to the cost or size limitations, multi-antenna nodes may not be available in some practical applications. In this case, node cooperation is an alternative way to enable single-antenna nodes to enjoy the benefits brought by multi-antenna nodes [12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Robust transmit design for secure AF relay networks with imperfect CSI

Chen

et al. 2016

J Wireless Com Network

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This paper studies robust transmit design for secure AF relay networks with imperfect channel state information (CSI). Two CSI error models, deterministically bounded error model and stochastic error model, are considered. In order to use the power at relays more efficiently, a joint cooperative relaying and jamming scheme is considered, where relays cooperate to forward the source signal and simultaneously they cooperate to send jamming signals to confuse the eavesdroppers. In this joint cooperative relaying and jamming framework, we address the robust joint optimization of the relay weights and the input covariance matrix of jamming signals for secrecy rate maximization (SRM), under both total and individual relay power constraints. Specifically, for the case of deterministically bounded error model, where the CSI error can be specified by an uncertainty set, we maximize the worst-case secrecy rate. While for the case of stochastic error model, where the probability distribution of the CSI error is Gaussian, we maximize the outage constrained secrecy rate. The challenge of these considered SRM-based optimizations lies in their non-convexity. This paper shows that such SRM-based optimization can be solved in a convex fashion and via solving a sequence of semidefinite programs (SDPs). Numerical results are presented to show the efficacy of the proposed scheme.

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“…Some fundamental relaying protocols such as amplify-andforward (AF) and decode-and-forward (DF) relaying can be applied in the physical layer security systems [26]- [31]. In [26], the authors have studied the secrecy performance of the cooperative DF relaying networks, and analyzed the impact of relay placement on the secrecy outage probability.…”

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confidence: 99%

“…In [31], the authors have studied the cooperative secure beamforming for AF relaying networks in the presence of multiple eavesdroppers. In [22]- [24], Wang et al proposed joint beamforming and jamming schemes to enhance the security of both one-way and two-way relay networks., which led to a breakthrough in the field of physical-layer secure design for cooperative relay systems.…”

mentioning

confidence: 99%

“…The utilization of multi-relay and multiuser provides both cooperative and multiuser diversity, which significantly improve the system outage probability and throughput [33], [34]. Moreover, multiple eavesdroppers may arise from realistic scenarios in which the malicious nodes are attempting to attack the legitimate destinations [25], [31]. The system consists of a base station BS, M trusted AF relays, and N desired users as well as K eavesdroppers.…”

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confidence: 99%

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Secure Multiuser Communications in Multiple Amplify-and-Forward Relay Networks

Fan

Lei

Duong

et al. 2014

IEEE Trans. Commun.

124

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Abstract-This paper proposes relay selection to increase the physical layer security in multiuser cooperative relay networks with multiple amplify-and-forward relays, in the presence of multiple eavesdroppers. To strengthen the network security against eavesdropping attack, we present three criteria to select the best relay and user pair. Specifically, criteria I and II study the received signal-to-noise ratio (SNR) at the receivers, and perform the selection by maximizing the SNR ratio of the user to the eavesdroppers. To this end, criterion I relies on both the main and eavesdropper links, while criterion II relies on the main links only. Criterion III is the standard max-min selection criterion, which maximizes the minimum of the dual-hop channel gains of main links. For the three selection criteria, we examine the system secrecy performance by deriving the analytical expressions for the secrecy outage probability. We also derive the asymptotic analysis for the secrecy outage probability with high main-to-eavesdropper ratio. From the asymptotic analysis, an interesting observation is reached: for each criterion, the system diversity order is equivalent to the number of relays regardless of the number of users and eavesdroppers.Index Terms-Multiuser communications, multi-relay cooperative networks, multiple eavesdroppers, physical layer security, secrecy outage probability.

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Cooperative Secure Beamforming for AF Relay Networks With Multiple Eavesdroppers

Cited by 167 publications

References 10 publications

Joint Resource Allocation in Secure OFDMA-Based Networks Taking a Base Station as a Two-Way Relay

Joint Resource Allocation in Secure OFDMA-Based Networks Taking a Base Station as a Two-Way Relay

Robust transmit design for secure AF relay networks with imperfect CSI

Secure Multiuser Communications in Multiple Amplify-and-Forward Relay Networks

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