Relay Selection for Security Enhancement in Cognitive Relay Networks

Liu, Yuanwei; Wang, Lifeng; Duy, Tran Trung; Elkashlan, Maged; Duong, Trung Q.

doi:10.1109/lwc.2014.2365808

Cited by 207 publications

(154 citation statements)

References 13 publications

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“…After relaxing ρ ∈ [0, 1] and η ∈ [0, 1], we can see that all constraints of problem (19) are affine and the target function is concave, therefore the Slater's condition is satisfied. This optimization problem can be solved by the Lagrange dual method with a zero duality gap [27].…”

Section: Problem Solutionmentioning

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: Problem Solutionmentioning

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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“…Several policies are proposed for relay selection [39]- [41]. In [39], four relay selection policies are proposed and compared, namely random relay and random jammer, random jammer and best relay, best relay and best jammer, and best relay and no jammer; and it characterizes the joint impact of the proposed relay selection policies and the interference power constraint on the secrecy performance by deriving new exact closed-form expressions for the secrecy outage probability; it is shown then that the jammer's absence gives rise to the outage saturation phenomenon.…”

Section: Jamming Policiesmentioning

confidence: 99%

A Survey on Cooperative Jamming Applied to Physical Layer Security

Atallah

Kaddoum

Kong

2015

2015 IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

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Abstract-Security has always played a critical role in wireless cooperative communication systems design. Eavesdropping and jamming are two common threats to the information security in wireless networks. However, jamming can be used in a cooperative manner to enable a secure communication link between the legitimate transmitter and the intended receiver. This paper presents a comprehensive survey on different jamming methods used to enhance the physical layer security. This survey outlines first the underlying concept and challenges with respect to security in wireless network design followed by a comprehensive literature review and analysis of jamming techniques with their applications in this field. For each jamming protocol, the paper categorizes different techniques within the existing literature by elaborating on their application, and corresponding performances.Index Terms-Physical layer security, cooperative jamming, beamforming, power allocation, artificial noise, multiple antennas, MIMO, game theory.

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“…Nowadays, the researches of CRNPLS transmission scheme mainly focus on relay selection [10,11,12,13,14] and relay beamforming [15,16]. There is also some research work reported in Chinese journals [6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

“…Given that relay beamforming is an important method of PLS, this paper mainly researches the CRNPLS transmission problems based on relay beamforming. There is a pair of nodes and some relay nodes in the bibliographies [10,11,12,13,14], but they just select the best one of the relays to transmit signal. Although bibliographies [15,16] mainly concern about CRNPLS transmission schemes with multi-relay collaboration, they concern only the condition of a pair of secondary users.…”

Section: Introductionmentioning

confidence: 99%

Joint Beamforming and the Artificial Noise Security Scheme Based on Successive Convex Approximation in Multi-relay Cognitive Network

Xie¹,

Xie²,

Shu³

et al. 2017

Proceedings of the International Conference on Computer Networks and Communication Technology (CNCT 2016)

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Abstract. To solve the transmission problemof physical layer security(PLS) in relay cognitive radio network (CRN), this paper investigates the PLS transmission scheme of multiple relays CRN, which contains two pairs of secondary nodes without direct link each other. Compared with the model that consists ofa pair of secondary node users and a single relay in terms of theoretical analysis and optimization, the proposed scheme is more complicated. To maximizethe joint secret rate of the secondary users,power allocation of the twosecondarysource transmission node withbeamforming andartificial noise assist (PBNAS) is obtained. Furthermore, exploiting the semidefinite programming theory (SDR) and the successive convex approximation (SCA) method, the original complex nonconvex problem is transformed into a convex optimization problem, and the iterative procedure is summarized.Finally, the security transmission rate versus different number relays andrelays total power is simulated. The simulation results show that the security performance of the PBNAS scheme is the best.

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Relay Selection for Security Enhancement in Cognitive Relay Networks

Cited by 207 publications

References 13 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

A Survey on Cooperative Jamming Applied to Physical Layer Security

Joint Beamforming and the Artificial Noise Security Scheme Based on Successive Convex Approximation in Multi-relay Cognitive Network

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