Dual-Element Indoor VLC Network with Two-stage Secure Link Adaptation Scheme

The physical layer security analysis is required in visible light technology based optical wireless communication networks, in order to deal with the eavesdropping attacks. In this study, we consider an indoor VLC network consisting of two light emitting diode elements. Further, based on ability to negate the eavesdropping attacks, the source transmitter selects either of the element to transmit the information to the legitimate user in the presence of an eavesdropper. In particular, for the selection of the element with desired ability, we propose a two-stage secure link adaptation scheme. We develop a mathematical framework to analyse the average secrecy capacity and secrecy outage probability of both single-element and dual-element VLC links. Further, we compare the numerical results of the proposed dual-element VLC network with the conventional single-element VLC network by varying physical parameters.