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Advances in Wireless and Optical Communications (RTUWO)

Physical Layer Security of Multi-user Full-Duplex One-Way Wireless Relaying Network

Volkan Özduran

Published Nov 1, 2018• 10 citations
Publisher

Abstract

This paper investigates the physical layer security of the orthogonal frequency division multiplexing based wireless relaying network. The investigation considers a multi-user untrustworthy amplify-and-forward based one-way full-duplex wireless relaying network in the system model. According to the Monte-Carlo simulation results, the friendly jammers severely affect the system achievable secrecy outage probability performance and degrade the system performance curves in high signal-to-noise ratio regimes. Results also show that the system model that contains a large number of user-pairs achieves better secrecy performance in comparison to a small number of user-pairs.

DOI
10.1109/rtuwo.2018.8587910

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This paper investigates the physical layer security of the orthogonal frequency division multiplexing based wireless relaying network. The investigation considers a multi-user untrustworthy amplify-and-forward based one-way full-duplex wireless relaying network in the system model. According to the Monte-Carlo simulation results, the friendly jammers severely affect the system achievable secrecy outage probability performance and degrade the system performance curves in high signal-to-noise ratio regimes. Results also show that the system model that contains a large number of user-pairs achieves better secrecy performance in comparison to a small number of user-pairs.
This paper investigates the physical layer security of orthogonal frequency division multiplexing technique. The investigation considers a multi-user untrustworthy half/full-duplex based two-way wireless relay with a finite number of friendly jammers in the system model. According to Monte-Carlo simulation results, the system model that operates in full-duplex mode achieves slightly better secrecy outage performance than the system model that operates in half-duplex mode. The results also show that friendly jammers, besides minimizing the information leakage, degrade the system performance severely and cause system coding gain losses in high signal-to-noise ratios.
This paper investigates the feedback delay effects on physical layer security. The investigation considers a dual-hop single amplify-and-forward based untrustworthy half/full-duplex two-way relay with a finite number of friendly jammers in the system model. According to the Monte-Carlo simulation results, the feedback delay degrades the system secrecy achievable rate and causes system coding gain losses in high signal-to-noise regimes. Results also show that if the number of friendly jammers in the system model increases then system secrecy achievable rate tends to degrade and causes system coding gain losses. Results also show that better system secrecy achievable rate can be achieved when the relay terminal operates in full-duplex mode.
In this paper, the physical layer security of full-duplex two-way multiple amplify-and-forward (AF) relaying network in the presence of an eavesdropper is analyzed. The closed-form expression of the approximate secrecy outage probability (SOP) based on the optimal relay selection scheme (ORS) in maximizing the secrecy capacity of proposed network is given out. Furthermore, Monte-Carlo simulation results validate the analytical expressions and show that secrecy performance can be impacted by different parameters, including the number of candidate relay and the average power of residual self-interference. The simulation results also show that the full-duplex relaying systems based on optimal relay selection scheme can significantly outperform the conventional single-relay systems and the traditional half-duplex scheme in secrecy performance.
This paper investigates the impact of the imperfect channel state information that is caused by the channel estimation errors on physical layer security. The investigation considers a dual-hop single amplify-and-forward (AF) based untrustworthy half/full-duplex bi-directional relay with a finite number of friendly jammers in the system model. According to Monte-Carlo simulation results, the channel estimation error causes system coding gain losses at low signal-to-noise ratio (SNR) regimes both for half and full-duplex cases. Results also show that the CEE effects turn out to be at negligible levels in high SNR regimes. Results also show that friendly jammer, besides improving the secrecy performance of the system model, also degrades the curves and causes system coding gain losses at high SNR regimes. Results also show that better secrecy performance can be achieved when the relay terminal operates in full-duplex mode.
In this paper, we are presenting a method to improve physical layer security (PLS) in wireless communication networks. Specifically, we would like to propose a one-way full-duplex (OWFD) relay network model with artificial noise (AN). The model consists of five nodes (source node, destination node, relay node, eavesdropping node, jamming node). To evaluate the security performance of the model, we analyzed key performance metrics such as the secrecy outage probability (SOP) and the system's secrecy throughput (STP) through deriving closed-form expressions for SOP and STP. Simulation results verify the proposed expressions using the Monte-Carlo method. The findings of this study demonstrated a significant improvement in security performance compared to previous researches. Additionally, the proposed model has highlighted the feasibility of implementing PLS techniques in OWFD relay networks.
The open broadcast nature of the wireless networks makes it vulnerable to the eavesdropper attacks. The physical layer security (PLS) is a grown research field that exploits the characteristics of the physical wireless channel to prevent the eavesdropper interruptions and attacks. The use of the cooperative relay transmission is a method to approach the physical layer security. This paper studies the secrecy performance metrics of the half-duplex two-way multi-relaying technique. A cooperative jamming protocol is proposed to enhance the physical layer security, where the destination sends jamming signals to the eavesdropper node to degrade its channel capacity. However, the relays can act as a jammer and send jamming signals to the eavesdropper node. Moreover, Simulations of the performance metrics namely the secrecy capacity (Cs) and the secrecy outage probability (SOP) applied on the technique are presented and discussed to measure the secrecy level of the proposed technique compared with an existing technique namely half-duplex one-way multi-relaying technique. Based on simulations and discussions the proposed technique outperforms the existing technique in term of secrecy performance.