Multi-User Relay Selection for Full-Duplex Radio

Atapattu, Saman; Dharmawansa, Prathapasinghe; Renzo, Marco Di; Tellambura, Chintha; Evans, Jamie

doi:10.1109/tcomm.2018.2877393

Cited by 38 publications

(23 citation statements)

References 42 publications

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“…According to [28], after cancellation, the destination-aided jamming signal is regarded as the RSI, which is hypothesised to be independent of other signals and yields to Gaussian distribution with zero mean and σ 2 i -variance. e variance is formulated as σ 2 i � kP v r , where the two constants, i.e., k > 0 and v ∈ [0, 1], depend on the interference cancellation scheme at the relay [29].…”

Section: Channel Descriptionmentioning

confidence: 99%

Analysis of SWIPT-Enabled Relay Networks with Full-Duplex Destination-Aided Jamming

Shi

Wang

et al. 2021

Security and Communication Networks

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Simultaneous wireless information and power transfer (SWIPT) is a major breakthrough in the field of low-power wireless information transmissions. In this paper, the secrecy performance of the SWIPT-enabled relay network with full-duplex destination-aided jamming is assessed, where both the power-splitting (PS) and time-switching (TS) schemes at the relay are considered with the linear and nonlinear energy harvesting models. The relay harvests energy from the confidential signal and artificial noise sent by the source and destination, respectively, and forwards the amplified signal to the destination, in the presence of an eavesdropper. The analytical closed-form expressions of the connection outage probability (COP), secrecy outage probability (SOP), and transmission outage probability (TOP) for PS- and TS-based schemes are derived, and the closed-form expression of the lower bound of ergodic secrecy capacity (ESC) is calculated. The asymptotic-form expressions of the COP, SOP, TOP, and ESC are further analyzed to capture the valuable information in the high SNR regime. Numerical results verify the correctness of analytical results, reveal the effects of the PS/TS ratio, and transmit the signal-to-noise ratio on secrecy performance.

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Section: Channel Descriptionmentioning

confidence: 99%

Analysis of SWIPT-Enabled Relay Networks with Full-Duplex Destination-Aided Jamming

Shi

Wang

et al. 2021

Security and Communication Networks

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“…Since the U 1 has the global CSI, it can completely eliminate the self-interference. To avoid loop interference, similar to full-duplex communications, the U 1 applies some sophisticated loop interference cancellations, which results in residual interference [14]. Among different models used in the literature of full-duplex communications, in this paper, we adopt the model where…”

Section: System Modelmentioning

confidence: 99%

Two–Way Communications via Reconfigurable Intelligent Surface

Atapattu

Fan

Dharmawansa

et al. 2020

2020 IEEE Wireless Communications and Networking Conference (WCNC)

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The novel reconfigurable intelligent surface (RIS) is an emerging technology which facilitates high spectrum and energy efficiencies in Beyond 5G and 6G wireless communication applications. Against this backdrop, this paper investigates two-way communications via reconfigurable intelligent surfaces (RISs) where two users communicate through a common RIS. We assume that uplink and downlink communication channels between two users and the RIS can be reciprocal. We first obtain the optimal phase adjustment at the RIS. We then derive the exact outage probability and the average throughput in closedforms for single-element RIS. To evaluate multiple-element RIS, we first introduce a gamma approximation to model a product of Rayleigh random variables, and then derive approximations for the outage probability and the average throughput. For large average signal-to-interference-plus-noise ratio (SINR) ρ, asymptotic analysis also shows that the outage decreases at the rate (log(ρ)/ρ) L where L is the number of elements, whereas the throughput increases with the rate log(ρ). Index Terms-Outage probability, reconfigurable intelligent surface (RIS), throughput, two-way communications.

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“…A robust resource allocation framework to improve the PLS performance in the presence of an active FD eavesdropper was proposed in [20]. [21], [22] investigated the userfairness relay selection problem for decode-and-forward FD relay networks where multiple users cooperate with multiple relays.…”

Section: Introductionmentioning

confidence: 99%

Impact of Outdated CSI on the Secure Communication in Untrusted In-Band Full-Duplex Relay Networks

2022

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To provide reliable connectivity in recent and future wireless communication systems, it is necessary to deploy several relay nodes. Further, a full-duplex (FD) technique has been in the spotlight since it can significantly improve spectral efficiency, and thus recent studies in relaying networks have considered FD relays. In relaying networks, confidentiality between the source and destination nodes from the relay node should be carefully kept, especially, when the relay node is not fully trusted, so-called untrusted relay node. To this end, in this paper, we consider physical-layer security taking into account an untrusted FD relay node. We investigate a secure relaying protocol against the untrusted relay node where the destination generates artificial noise to prevent the untrusted relay from decoding the source information. We derive the analytical expression of the lower bound of the ergodic secrecy rate ( R). We find two main factors affecting the secrecy performance: residual self-interference (RSI) at the FD-available nodes (i.e., relay and destination), and outdated channel state information (CSI) at the destination. Thereafter, we evaluate their effects on R and suggest the algorithm for finding the sub-optimal artificial noise power level at the destination for maximizing R. Through simulations, we have verified our mathematical derivation and have shown that our secure relaying protocol can achieve near-optimal secrecy performance. Numerical results imply that the artificial noise power level should be carefully considered when the channel is severely outdated and RSI is irresistible.INDEX TERMS Physical-layer security, untrusted relay, full-duplex, outdated channel state information, artificial noise.

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Multi-User Relay Selection for Full-Duplex Radio

Cited by 38 publications

References 42 publications

Analysis of SWIPT-Enabled Relay Networks with Full-Duplex Destination-Aided Jamming

Analysis of SWIPT-Enabled Relay Networks with Full-Duplex Destination-Aided Jamming

Two–Way Communications via Reconfigurable Intelligent Surface

Impact of Outdated CSI on the Secure Communication in Untrusted In-Band Full-Duplex Relay Networks

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