Full-Duplex Relay for Enhancing Physical Layer Security in Multi-Hop Relaying Systems

Lee, Jong-Ho

doi:10.1109/lcomm.2015.2401551

Cited by 124 publications

(82 citation statements)

References 16 publications

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“…With a network security perspective, calculation of the transmit power allocations for fullduplex relays that are obtained by a sub-optimal approach to maximize the lower bound of the achievable secrecy rate using the geometric programming method is done [58]. To achieve the structured cancellation defined in [59], a transmission strategy for multi-hop full-duplex relay network was proposed that is limited to the situations in which the source-to-relay SNR is higher than the relay-to-destination SNR, and limited to the case that the residual self-interference channel coherence time is short.…”

Section: Previous Work On Multi-hop Network With Full-duplex Relayingmentioning

confidence: 99%

Outage probability of multi‐hop networks with amplify‐and‐forward full‐duplex relaying

Sureshbabu

Samavat²,

et al. 2018

IET Communications

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Full-duplex communication has attracted significant attention as it promises to increase the spectral efficiency compared to half-duplex. Multi-hop full-duplex networks add new dimensions and capabilities to cooperative networks by facilitating simultaneous transmission and reception and improving data rates.When a relay in a multi-hop full-duplex system amplifies and forwards its received signals, due to the presence of self-interference, the input-output relationship is determined by recursive equations. This thesis introduces a signal flow graph approach to solve the problem of finding the input-output relationship of a multi-hop amplify-and-forward full-duplex relaying system using Mason's gain formula. Even when all links have flat fading channels, the residual self-interference component due to imperfect self-interference cancellation at the relays results in an end-to-end effective channel that is an all-pole frequency-selective channel. Also, by assuming the relay channels undergo frequency-selective fading, the outage probability analysis is performed and the performance is compared with the case when the relay channels undergo frequency-flat fading. The outage performance of this system is performed assuming that the destination employs an equalizer or a matched filter.For the case of a two-hop (single relay) full-duplex amplify-and-forward relaying system, the bounds on the outage probability are derived by assuming that the destination employs a matched filter or a minimum mean squared error decision feedback equalizer. For the case of a three-hop (two-relay) system with frequency-flat relay channels, the outage probability analysis is performed by considering the output SNR of different types of equalizers and matched filter at the destination. Also, the closed-form upper bounds on the output SNR are derived when the destination employs a minimum mean squared error decision feedback equalizer which is used in outage probability analysis. It is seen that for sufficiently high target rates, fulli duplex relaying with equalizers is always better than half-duplex relaying in terms of achieving lower outage probability, despite the higher RSI. In contrast, since fullduplex relaying with MF is sensitive to RSI, it is outperformed by half-duplex relaying under strong RSI.ii ACKNOWLEDGMENTS I would like to express my gratitude to my supervisor, Dr. Cihan Tepedelenlioglu, for his support and supervision. His guidance and encouragement have been key in making this work a success.

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Section: Previous Work On Multi-hop Network With Full-duplex Relayingmentioning

confidence: 99%

Outage probability of multi‐hop networks with amplify‐and‐forward full‐duplex relaying

Sureshbabu

Samavat²,

et al. 2018

IET Communications

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“…Although FD relay selection [7,8] has been researched in some studies, few of them consider the security constraint. Some research [17][18][19] has analyzed the performance of FD relay on physical layer security, but only one relay was considered instead of FD relay selection. Specifically, in Ref.…”

Section: Journal Of Communications and Information Networkmentioning

confidence: 99%

“…Secure communication in multi-hop FD relaying systems was considered in Ref. [19]. However, it was assumed in Ref.…”

Section: Journal Of Communications and Information Networkmentioning

confidence: 99%

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Enhancing physical-layer security via big-data-aided hybrid relay selection

Ren

et al. 2017

J. Commun. Inf. Netw.

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Abstract:The explosive growth in data traffic presents new challenges to the new generation of wireless communication systems, such as computing capabilities, spectrum efficiency and security. In this paper, we use the network structure, which is adaptable for the big data traffic, to improve the security of wireless networks. Specifically, a big-data aided hybrid relay selection scheme is designed and analyzed to enhance physical layer security. First, considering the ideal situation that an eavesdropper's CSI (Channel State Information) is known to the legal nodes, we propose an optimal hybrid relay selection scheme consisting of the optimal mode selection scheme and the optimal relay selection scheme. In this case, we analyze the upper bound of an eavesdropper's capacity in FD (Full-Duplex) mode and the secrecy outage probabilities of the optimal HD (Half-Duplex), FD, and hybrid relay selection schemes. Through the analysis of data, it is clear that the mode selection is decided by the self-interference of the FD technique. However, the instantaneous CSI of an eavesdropper is difficult to obtain due to the passive characteristic of eavesdroppers in practice. Therefore, a more practical hybrid relay selection scheme with only the channel distribution information of an eavesdropper is further studied, where a weighting factor is employed to guarantee that the hybrid mode is no worse than either the FD mode or HD mode when the self-interference grows. Finally, the simulation results show the improved security of our proposed scheme.

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“…Lee [11] considered the secrecy rate of a three-hop full-duplex DF relaying network and designed a cooperative transmission scheme. A suboptimal power-allocation algorithm was proposed to maximize the lower bound of secrecy rate.…”

Section: Introductionmentioning

confidence: 99%

Secure Connectivity Probability of Multi-hop Clustered Randomize-and-Forward Networks

Wang¹,

Su²,

Wang³

2017

ETRI Journal

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This work investigates secure cluster-aided multihop randomize-and-forward networks. We present a hop-by-hop multi-hop transmission scheme with relay selection, which evaluates for each cluster the relays that can securely receive the message. We propose an analytical model to derive the secure connectivity probability (SCP) of the hop-by-hop transmission scheme. For comparison, we also analyze SCPs of traditional end-to-end transmission schemes with two relay-selection policies. We perform simulations, and our analytical results verify that the proposed hop-byhop scheme is superior to end-to-end schemes, especially with a large number of hops or high eavesdropper channel quality. Numerical results also show that the proposed hop-by-hop scheme achieves near-optimal performance in terms of the SCP.

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Full-Duplex Relay for Enhancing Physical Layer Security in Multi-Hop Relaying Systems

Cited by 124 publications

References 16 publications

Outage probability of multi‐hop networks with amplify‐and‐forward full‐duplex relaying

Outage probability of multi‐hop networks with amplify‐and‐forward full‐duplex relaying

Enhancing physical-layer security via big-data-aided hybrid relay selection

Secure Connectivity Probability of Multi-hop Clustered Randomize-and-Forward Networks

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