Secrecy performance of a novel energy efficient hybrid CIoT network with beacon-aided RF energy harvesting under dissimilar fading environments

Abstract

This paper presents a novel energy-efficient Radio Frequency (RF) Energy Harvesting (EH) scheme for secrecy performance in Internet of Things (IoT) network using cooperative communication approach under dissimilar faded channel environments. We have combined the concept of Destination Based Jamming (DBJ) with power beacon aided EH in our model. This paper provides three scenarios when the links undergo rayleigh fading, weibull fading, and nakagami-q (hoyt) fading where the effect of fading on the secrecy performance has been examined. Closed-form expressions for Secrecy Rate (SR) and System Energy Efficiency (SEE) are derived for the given scenarios. Analytical expressions have been well substantiated through extensive simulation results. The comparative analysis of system performance in terms of SR with respect to some important system parameters has been shown for various conventional protocols i.e., Decode-and-Forward (DF), Amplify-and-Forward (AF) and Hybrid-Decode-Amplify-Forward (HDAF). Furthermore, our scheme has been compared with benchmark techniques such as Cooperative Relaying (CR) and Cooperative Jamming (CJ) to quantify the performance improvement. Theoretical analysis and simulated results reveal the improvement of our proposed Signal-to-Noise (SNR) based hybrid decode-amplify forward Cooperative IoT (CIoT) scheme over existing relaying schemes which are further validated through statistical analysis. Results also depict the impact of eavesdropper position on secrecy performance at different channel mean power values. Finally, the SEE has been addressed and the impact of power splitting factor and transmit beacon power on the secrecy performance on the proposed model has also been analyzed with respect to change in fading parameters.