VLC-based DCO-OFDM and WSN in hospitals for medical information transmission

Visible light communication (VLC) has the potential of combining the idea of illumination and communication, and that creates the growing interest of using optical communication in recent wireless communication scenario. To any electronic gadgets used by the doctors, the VLC can transfer the medical information through the light emitting diodes (LEDs) installed in the room (indoors) for the purpose of illumination. The broadband transmission technology is supported by VLC. A wireless sensor network (WSN) is a network composed of numerous autonomous sensor nodes that communicate wirelessly to collect and transmit data from the patients. These networks are commonly used in scenarios where it is not practical to use wired communication, or where data need to be collected from remote or inaccessible locations. Cluster nodes reinforcement scheme (CNRS) improves the routing efficiency and also increases the network lifetime. In this scheme, the base station transmits the pilot message to each node, and normal nodes reply back to the pilot message. The work evaluates about end-to-end (ETE) delay of CNRS and BER in binary phase shift keying (BPSK) with DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) in VLC while transferring the medical details collected through WSN.