I. Introduction
Today, there is enormous growth in the need for wireless data sharing. Wireless communication using radio frequency is a mainstream type of communication used. A wireless network is one of the prerequisites to transferring data from device to device. When many devices access the internet, networks become sluggish. As more and more devices are attempting to connect to the internet and reserve a bandwidth, the want to transfer high amounts of data becomes arduous. However, radio wave frequencies are but a minute part of the waves that are utilised to transfer information. Li-Fi is a solution to this problem: a fast, pocket-friendly and reliable means of wireless communication. Li-Fi (Light Fidelity), also called as D-Light (Data Light), is a wireless communication system. After contemplating the scope and developing the technology into a functional prototype, German physicist Professor Dr. Harald Haas (University of Edinburgh, UK) first commercially introduced this technology in July 2011, on the platform TED Global Talk on Visible Light Communication. Li-Fi technology requires a light source, which is easily available around us and can be used for illumination and communication at the same time. Using LEDs for data sharing purposes is ecological and does not affect adversely, which is not the case with radio waves. They consume comparatively low power, which is beneficial in both financial and ecological aspects. In addition, Li-Fi has many advantages over techniques like Wi-Fi:
Consumes less energy as compared to Wi-Fi as LEDs are available everywhere.
Provides high bandwidth and low interference which gives higher data rates which are approximately 1 Gbps or even higher than that.
Cost efficient as it uses LED bulbs for data transmission and it requires fewer components for its working.
As light cannot penetrate opaque objects, Li-Fi proves to be more secure than other data-sharing systems.
Visible light is about 10,000 times larger than the range of radio frequency waves.