Light Fidelity: A New Prototype in Wireless Communication

Abstract

Light Fidelity (Li-Fi) is a label for  wireless-communication systems using light as a carrier  instead of traditional radio Frequencies [1], as in Wi-Fi.  Li-Fi has the advantage of being able to be used in sensitive  areas such as in Aircraft without causing interference.  However, the light waves used cannot penetrate walls. It is  typically implemented using white LED light bulbs at the  Downlink transmitter. The operational procedure is very  simple-, if the LED is on, you transmit a digital 1, if it’s off  you transmit a 0. The LEDs can be switched on and off very  quickly, which gives nice opportunities for transmitting data.  Hence all that is required is some LEDs and a controller that code data into those LEDs. All one has to do is to vary the rate  at which the LED’s flicker [2] depending upon the data we  want to encode. Li-Fi can be useful in future as a  replacement and backup of Wireless Fidelity (Wi-Fi) for  indoor communication because it can provide high data rate  of transmission along with high capacity to utilize more users  as its spectrum bandwidth is much broader than the radio  spectrum. In this paper we will look at the different aspects  of the Li-Fi based indoor communication system, summarizes  some of the research conducted so far and we will also  proposed a Li-Fi based communication model keeping in  mind coverage area for multiple user and evaluate its  performance under different scenarios. Such advancements  promise a theoretical speed of 10 Gbps-meaning one can  download a full high-definition film in just 30 seconds.