On the secrecy performance of a two-way IoT relay network with interference-aided RF energy harvesting

Maymoona Hayajneh, Thomas Aaron Gulliver

Shashibhushan Sharma, Anurag Kumar, Sanjay Dhar Roy +1 more

Chandrima Thakur, Sudipta Chattopadhyay

This paper introduces a novel scheme of Maximum Radio Frequency Energy Harvested Antenna Selection in Two-Way Communication via two multi-antenna Relays in the presence of an interferer under eavesdropper attack. The basic objective of our work is to investigate the Secrecy Performance in Two-Way Multi-antenna Relay network with Interference-aided EH using Maximum Harvested Energy Antenna-Selection Scheme. The impact of some network parameters, namely energy harvesting coefficient, Transmit Power of Sources, Interferer Transmit Power, Global Target Secrecy Rate and no of antennas has been examined on the Secrecy capacity. Simulation results demonstrate that our proposed model improves the secrecy performance significantly as compared to its contrast models. Also a trade-off has been observed between secure transmission and reliable communication. Furthermore, these results serve as a criterion for the deployment of maximum number of antennas for two way communication to enhance the Secrecy Capacity.

Cheng Yin, Emiliano Garcia‐Palacios, Hien M. Nguyen

Yong Wang, Tao Zhang, Weiwei Yang +3 more

This article investigates secure communication between a source and a destination via multiple radio frequency (RF) energy harvesting (EH) relays, in which the RF-EH relays are untrusted and apply the amplify-and-forward policy. On the one hand, to prevent the untrusted relays from eavesdropping the confidential information, the destination-aided jamming is employed, in which the destination emits jamming signal to interfere the relays while the source transmits information signal. On the other hand, the power splitting (PS) policy is adopted at the relays to harvest energy and process information, in which every relay has a finite energy storage to accumulate the energy harvested from the source’s information signal and destination’s jamming signal. To achieve energy-efficient and fully distributed implementation, we propose an energy-aware distributed beamforming (EADB) scheme, in which each relay only needs local information to decide whether to assist the source-destination communication. To evaluate the secrecy performance of the EADB scheme, the charging and discharging behaviors of the relays’ energy storage are first tracked using the Markov chain. On this basis, we derive analytical expressions for the hybrid outage probability (HOP) and secure energy efficiency (SEE) of the considered network. Finally, numerical results show that the EADB scheme has a better secrecy performance than the existing scheme. In addition, despite the curiousness of the untrusted relays, deploying more relays and increasing their energy storage capacity can enhance the security of the considered network.

Van Nhan Vo, Tri Gia Nguyen, Chakchai So–In +2 more