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International Conference on Computer and Applications (ICCA)

Energy Efficiency and Secure Communication with Power Splitting Energy Harvesting Technique for Single Relay Network

Poonam Jindal, Rupali Sinha

Published Sep 1, 2017• 4 citations
Publisher

Abstract

This paper investigates the secrecy performance of a single hop wireless relay network employing power splitting (PS) energy harvesting (EH) technique, using the term secrecy rate. In this network, a relay is present between source and destination to forward signal to the destination and a power beacon provides power to relay and source using EH technique to perform their respective roles. The secrecy rate of this system is analyzed for two cooperative schemes i.e. decode-and-forward (DF) and amplify-and-forward (AF).

DOI
10.1109/comapp.2017.8079778

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In this article, we investigated the secrecy performance of a three-hop relay network system with Power Splitting (PS) and Energy Harvesting (EH). In the presence of one eavesdropper, a signal is transferred from source to destination with the help of a relay. The source signal transmits in full-duplex (FD) mood, jamming the relay transfer signals to the destination. The relay and source employ Time Switching (TS) and Energy Harvesting (EH) techniques to obtain the power from the power beacon. In this study, we compared the Secrecy Rate of two Cooperative Schemes, Amplify and Forward (AF) and Decode and Forward (DF), for both designed systems with the established EH and PS system. The Secrecy Rate was improved by 50.5% in the AF scheme and by 44.2% in the DF scheme between the relay and eavesdropper at 40 m apart for the proposed system in EH and PS. This simulation was performed using the Monto Carlo method in MATLAB.
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In wireless communication, physical layer security is widely used for secure communication between the transmitter and the receiver. In this paper, the secrecy performance of two cooperative schemes, decode-and-forward (DF) and amplify-and-forward (AF) relays is investigated in a single hop wireless relaying system. The achievable secrecy rate is investigated with these two types of relays under the constraint of total power transmitted. In the given jamming relay network, the relay transmits jamming signal while receiving data signal from the source. It is indicated by the resulting analysis that the AF relays have better secrecy rate as compared to the DF relays in the given condition. The secrecy rate of the AF relay is higher than that of the DF relay by 71.88% at a distance of 70 m between the relay and the eavesdropper in this jamming relay network.
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This paper analyzes the secrecy performance of a two-hop cooperative network with battery-assisted energy harvesting (EH) nodes. Both the source and the relay employ jamming to improve secrecy. A power beacon (PB) supplies energy to the nodes using the harvest-store-use (HSU) architecture. To counter the variation in harvested energy, some battery energy is added to it. Both nodes apportion this sum energy between the information and jamming symbols. We consider the maximal ratio combining (MRC) of the direct and relayed signals at the destination and the eavesdropper. We assume channel state information (CSI) of destination and eavesdropper links are not available at both the source and relay. We derive an approximate expression for secrecy outage probability assuming the selective decode-and-forward (SDF) protocol. We then derive the high-SNR approximation to it. We demonstrate improvement in secrecy performance with an increase in the transmit power of PB. Also, there exists an optimal power apportioning parameter different from equal power allocation that minimizes secrecy outage both at the source and at the relay. Extensive simulations corroborate the derived analytical results.