Wednesday, August 4, 2021

Li-Fi: The Future Of Internet

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Happy with 4G or your current Wi-fi system? Then hold your breath, my friends. After some days, your internet will be super fast, yes! Faster than it is now. Don’t believe me? Read on.

Here is some good news for the internet geeks who love to download and upload information, videos, songs, etc., in a few seconds. This is for the people who love speed and want it to be faster and faster each day. I am going to tell you about an upcoming technology which is known to very few of us. The ‘Li-Fi’- ‘Light Fidelity’ aka Optical Wi-Fi is what will end up to be phenomenal.



With an estimated compound growth rate of 82% by  2018, the Li-Fi has gathered all the technologists’ attention. It will be worth over $6 billion per year by 2018. Can you imagine several small LEDs having so much information to transmit to you? Amazing.

Let’s go through the history first. Professor Harald Hass of the University Of Edinburgh(2010) gave the Li-Fi prototype’s first-ever demonstration at the TED Global Conference in Edinburgh. The technology aims at creating a new communication channel with the use of existing equipment.

The Li-Fi is a 5G communication. It uses light from light-emitting diodes, i.e., LEDs, as a medium. Its working is similar to Wi-Fi and Optical Fiber. It is an optical version of Wi-Fi, and it is very fast, cheap, and wireless. In Li-Fi, the LEDs work as an access point. Everything electronic can be connected to the Internet. The VLC signals work by switching on and off in nanoseconds and cannot be interpreted by the human eye. A photodetector is placed at the end of LEDs which receives, amplifies, and processes the data. It uses 802.11 protocols that are similar to Wi-Fi.




In 2011, Li-Fi Consortium was formed by companies and industrialists. In 2012, VLC was added in Li-Fi. In 2013, the demonstration of over 1.6 GBit/s was carried out with a single color LED. In October 2013, reports came that the Chinese manufacturers are working on the Li-Fi kit development. Russian Company Stins Coman announced the development of a Li-fi wireless network called BeamCaster in 2014. In January 2014, the first mobile prototype of Li-Fi was launched.




1. Its range is concise and can’t penetrate through the walls, which makes it very secure from hackers.

2. As salt conducts electricity, it can be used underwater without radio interference.

3. It can be used in planes because it does not interfere with the radio waves.

4. It uses the visible light from the Electromagnetic Spectrum.




Li-Fi system will bring 100 Gbps speed to your PC. Though the Ph.D. students of Oxford University say that such a type of indoor wireless facility cannot replace Wi-Fi, the data rates of 3 terabits per second are very promising. In contrast, Wi-fi has a speed of only 7 Gbps.

The Li-Fi, once fully developed, will be very cheap, but now its setup is costly. The technologists are working on it and carrying out various demonstrations. Li-Fi is believed to be the most promising technology. Introduced in 2010, there are many hopes of technologists attached to it. Through Li-fi, the way to access the Internet will change completely. Whether it will be able to survive or not is an important question yet to be answered! 🙂




-Anubha Manjeshwar




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