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Security and Reliability Performance of a Cooperative Network with Self-Sustaining Nodes

Amit Patel, Shankar Prakriya

Published Apr 2, 2024• 0 citations
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Abstract

In this paper, we analyze the secrecy performance of a two-hop cooperative network consisting solely of energy-harvesting self-sustaining nodes drawing energy from a multi-antenna power beacon (PB). Performance of such networks is quite different from that with powered nodes. We consider optimal combining of the direct and relayed signals at the multi-antenna destination as well as the multi-antenna eavesdropper. Since availability of channel state information at the source is impractical in such networks, we assume fixed-rate signaling. To implement incremental signaling, we utilize feedback bits from the destination. Assuming practical nonlinear EH, exact and approximate expressions are derived for the secrecy outage probability of the selective decode-and-forward (SDF) and the incremental decode-and-forward (IDF) relaying schemes. It is demonstrated that IDF has much better secrecy performance than SDF just as with powered nodes. However, unlike with powered nodes, the secrecy performance is a convex function of the transmit power of PB. We propose a novel power back-off scheme to improve secrecy under different network operating conditions. The security-reliability trade-off (SRT) is analyzed to highlight the trade-off between outage and secrecy performance with the power back-off scheme. Simulation results validate the analytical expressions.

DOI
10.36227/techrxiv.171207477.79634086/v1

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In this paper, we analyze the secrecy performance of a two-hop cooperative network consisting solely of energy-harvesting self-sustaining nodes drawing energy from a multi-antenna power beacon (PB). Performance of such networks is quite different from that with powered nodes. We consider optimal combining of the direct and relayed signals at the multi-antenna destination as well as the multi-antenna eavesdropper. Since availability of channel state information at the source is impractical in such networks, we assume fixed-rate signaling. To implement incremental signaling, we utilize feedback bits from the destination. Assuming practical nonlinear EH, exact and approximate expressions are derived for the secrecy outage probability of the selective decode-and-forward (SDF) and the incremental decode-and-forward (IDF) relaying schemes. It is demonstrated that IDF has much better secrecy performance than SDF just as with powered nodes. However, unlike with powered nodes, the secrecy performance is a convex function of the transmit power of PB. We propose a novel power back-off scheme to improve secrecy under different network operating conditions. The security-reliability trade-off (SRT) is analyzed to highlight the trade-off between outage and secrecy performance with the power back-off scheme. Simulation results validate the analytical expressions.
In this paper, we analyze (for the first time in literature) the secrecy performance of a two-hop cooperative network in which all the nodes are of the energy-harvesting self-sustaining type. Both source and relay harvest energy from a power beacon (PB) and employ the harvest-use (HU) architecture. We consider optimal combining of the direct and relayed signals at the destination and eavesdropper. We do not assume any channel state information (CSI) at the source. We derive an approximate closed-form expression for secrecy outage probability assuming selective decode-and-forward (SDF) protocol at the relay. We demonstrate that secrecy outage is a convex function of the transmit power of PB. Further, the security-reliability trade-off (SRT) is analyzed to highlight the trade-off between outage and intercept probability. Computer simulations validate the derived analytical expressions
In this paper, we analyze (for the first time in literature) the secrecy performance of a two-hop cooperative network in which all the nodes are of the energy-harvesting self-sustaining type. Both source and relay harvest energy from a power beacon (PB) and employ the harvest-use (HU) architecture. We consider optimal combining of the direct and relayed signals at the destination and eavesdropper. We do not assume any channel state information (CSI) at the source. We derive an approximate closed-form expression for secrecy outage probability assuming selective decode-and-forward (SDF) protocol at the relay. We demonstrate that secrecy outage is a convex function of the transmit power of PB. Further, the security-reliability trade-off (SRT) is analyzed to highlight the trade-off between outage and intercept probability. Computer simulations validate the derived analytical expressions
In this paper, we analyze (for the first time in literature) the secrecy performance of a two-hop cooperative network in which all the nodes are of the energy-harvesting self-sustaining type. Both source and relay harvest energy from a power beacon (PB) and employ the harvest-use (HU) architecture. We consider optimal combining of the direct and relayed signals at the destination and eavesdropper. We do not assume any channel state information (CSI) at the source. We derive an approximate closed-form expression for secrecy outage probability assuming selective decode-and-forward (SDF) protocol at the relay. We demonstrate that secrecy outage is a convex function of the transmit power of PB. Further, the security-reliability trade-off (SRT) is analyzed to highlight the trade-off between outage and intercept probability. Computer simulations validate the derived analytical expressions
In this paper, we analyze (for the first time in literature) the secrecy performance of a two-hop cooperative network in which all the nodes are of the energy-harvesting self-sustaining type. Both source and relay harvest energy from a power beacon (PB) and employ the harvest-use (HU) architecture. We consider optimal combining of the direct and relayed signals at the destination and eavesdropper. We do not assume any channel state information (CSI) at the source. We derive an approximate closed-form expression for secrecy outage probability assuming selective decode-and-forward (SDF) protocol at the relay. We demonstrate that secrecy outage is a convex function of the transmit power of PB. Further, the security-reliability trade-off (SRT) is analyzed to highlight the trade-off between outage and intercept probability. Computer simulations validate the derived analytical expressions.
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.
This paper studies the secrecy performance of an energy-harvesting relaying system in the presence of a dualuse source node and an eavesdropper.Specifically, the source has dual roles in the dual-hop communication: 1) to transmit confidential information in the first hop; 2) to generate jamming signal to interfere the eavesdropper in the second hop.Moreover, the multi-antenna relay deploys a power-splitting harvesting scheme to coordinate the information receiving and energy harvesting, and adopts maximal ratio combining technique to process the multiple copies of signals.Considering decode-andforward protocol and transmit antenna selection scheme, we derive an analytical expression for secrecy outage probability, and perform Monte Carlo simulation to validate the analysis.Analytical results show that the SOP performance with the dualuse source node can be effectively improved when the relaydestination channel does not have absolute advantage over the relay-eavesdropper channel.