Li-Fi is point-to-point, a high-speed wireless communication system that is similar to Wi-Fi as well as new and advanced. It has taken as the companion to cellular networks (Wi-Fi) or RF communication.
It is infrared or UV visible-light and wire communication and uses near-ultraviolet as a replacement of radio-frequency spectrum.
The delivery of network is done by Light-emitting diodes (LEDs), the Visible Light communication (VLC) runs through switching the current to the LEDs off and quickly, as fast that couldn’t be recognized by the human eyes.
Both Li-Fi and Wi-Fi convey data through the electromagnetic spectrum, however, Li-Fi uses visible lights in a contrary, Wi-Fi operates using radio waves.
How Li-Fi works
The data transmission process of both Li-Fi and Wi-Fi is similar, electromagnetically. Although, Wi-Fi operates on radio waves while Li-Fi uses visible light.
The Visible Light Communication (VLC) technology accommodates a photo identifier to collect light signals and a signal operating mechanisms to transform the data into stream-able content.
A semiconductor, the lightbulb is a light source meaning that the stable current of electricity supplied to and LED lightbulb dimmed and immerse, up and down at lightning speeds, can’t be visible to human eyes.
For example, through signal processing system data are fed into LED lights, later data are sent to the photodiode at a rapid speed, then the changes in the instant dimming of LEDs converted by a receiver into electronic signals.
The transferred signals later converted into a binary data stream which we recognize as tbhe web audio and video application that runs on computing devices.
History of Li-Fi
Li-Fi technology is not an entirely new concept or new invention. Visible light communication (VLC) has histories since the 80s which includes part of electromagnetic spectrum i.e. visible light to transform information.
The concept of Li-Fi has first introduced by Harald Haas, at his TED Global Talk where he highlights the wireless data transmission through every light. Mr. Haas is a Co-founder of PureLiFi and Chairman at the University of Edinburgh, Mobile Communication department.
In Oct. 2011, communication industries and companies designed the Li-Fi consortium, to encourage optical wireless system with high speed. And to avoid the use of radio-based wireless spectrum, replacing by electromagnetic spectrum.
By the Q2 2013, data transfer rates of above 1.6 Gbps were illustrated for a single color LED. Later in Q3, it was reported by Chinese media that Chinese manufacturers were giving effort on Li-Fi development kits.
Reasons behind the popularity of Li-Fi
Well, there is not any specific mechanism on security, however, we don’t have to be panic about. It really does not need any security concept, as we all know light cannot penetrate through walls to go beyond your workplace.
There is no any way to leakages for your internet package, particularly it is way secure than a Wi-Fi due to the fact that Wi-Fi can be cracked, however, Li-Fi is Un-accessible to hackers.
Extra High Speed:
One of the biggest advantages of the Li-Fi technology is high-speed blazing and instant data transmission, i.e. above 100 times faster than of Wi-Fi.
Wherever you get a light source, you can have access with Li-Fi, Light bulbs are available almost everywhere in our community even in Cruise and Aeroplanes, so high-speed data transmission could be accessible anywhere.
There are great benefits for using VLC in Medical lines like hospital or healthcare center. Wi-Fi are unlikely in some parts of hospitals, especially near Operation treaters and MRI scanners.