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