Open AccessOn outage secrecy minimisation in an energy harvesting relay assisted cognitive radio networks
Author(s) -
Banerjee Avik,
Maity Santi P.,
Roy Subhabrata
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2018.5359
Subject(s) - relay , transmitter , computer science , cognitive radio , transmitter power output , secrecy , energy harvesting , node (physics) , computer network , secondary source , underlay , interference (communication) , energy (signal processing) , telecommunications , signal to noise ratio (imaging) , power (physics) , wireless , mathematics , computer security , engineering , statistics , physics , quantum mechanics , channel (broadcasting) , structural engineering , social science , sociology
This work considers an energy harvesting (EH) based two‐hop relay assisted cognitive radio system that consists of a secondary transmitter, a relay node and a cooperative jammer operated in an underlay mode with a primary transmitter–receiver pair. An optimisation problem is formulated to minimise the secrecy outage probability under the constraints of simultaneously meeting the energy causality of the secondary transmit nodes, interference to the primary receiver and secondary outage probability. An analytical expression of the secrecy outage probability is developed followed by deriving the closed‐form expressions to determine the optimal transmit power of the source, the relay node and the fraction of the time slot for EH. Simulation results show that the minimum value of the secrecy outage probability is ∼ 6.4 % and ∼ 19.18 % less over the existing works.