Secure Energy Harvesting Relay Networks with Unreliable Backhaul Connections

Cheng Yin, Huy T. Nguyen, Chinmoy Kundu, Zeeshan Kaleem , Francisco Garcia-Palacios, Quang Duong

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)
231 Downloads (Pure)


Wireless backhaul is a cost-effective and flexible alternative to wired backhaul, yet it suffers from unreliability. This paper studies the secrecy performance of a relay network with such unreliable wireless backhaul. Bernoulli process is adopted to model the wireless backhaul reliability. In the network, a relay employing time-switching-based radio frequency harvesting technique aids in forwarding the signal from the best transmitter. An eavesdropper, which is able to wiretap signals from both the transmitter and the relay, uses selection combining to maximize its received signal-to-noise ratio. Analytical expressions for secrecy outage probability, ergodic secrecy rate and non-zero achievable secrecy rate are derived, which can reveal the effect of the number of transmitters and backhaul reliability on the system performance. Furthermore, for the first time the impact of energy harvesting time fraction upon secrecy performances under unreliable backhaul is presented.
Original languageEnglish
Pages (from-to)1-9
JournalIEEE Access
Early online date17 Jan 2018
Publication statusEarly online date - 17 Jan 2018


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