Li-Fi Technique Transmission of data through light

Abstract

Li-Fi stands for Light-Fidelity. Li-Fi computation, proposed by the German physicist—Harald Haas, provides flowing of data through illumination by sending data through an LED light bulb that varies in intensity quicker than the human eye can follow. This paper focuses on developing a Li-Fi based  environment  and  analyzes  its  performance  with  respect  to existing technology. Wi-Fi is great for general wireless coverage within buildings, whereas Li-Fi is ideal for high density wireless data   coverage   in   limited   area   and   for   relieving   radio interference issues. Li-Fi provides better bandwidth, efficiency, availability and security than Wi-Fi and has already achieved amazingly high speed in the lab. By taking into account the low-cost nature of LEDs and lighting units there are many opportunities to exploit this medium, from public internet access through street lamps to auto-piloted cars that communicate through their headlights. Haas envisions a future where data for laptops, smart phones, and tablets will be transmitted through the light in a room.