What is Optical Wireless Communication

Presently IoT Health care systems utilize Radio Frequency (RF) signal to transmit the data. The capacity, latency and crowded frequency spectrums are the bottle-necks of RF-based communication. Apart from spectral congestion, interference and security issues, electromagnetic RF exposure may result in health issues. This limitation can be besieged by the advanced optical wireless communication technologies, by transmitting binary via optical signal through a technique is known as visible light communication or VLC. Amalgamation of VLC- IoT-based systems opens new era in real time health monitoring, which provides fast data collection, processing and real time communication. It eliminates the interference created by RF based devices in special equipment and complete safety during the exposure of patients. This chapter discusses about the VLC transmitters and receivers, current challenges and future trends of VLC, VLC based IoT for healthcare systems. VLC does not employ electromagnetic-waves and therefore have no side effect on human especially pregnant women.