Li-Fi: The Future Of Internet

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Li-Fi: The Future Of Internet 1

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

Here is some good news for the internet geeks who love to download and upload in a few seconds. This is for the people who love speed and want to it 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% up to 2018, the Li-Fi has gathered attention of all the technologists. It will be worth over $6 billion per year by 2018. Can you imagine several small LED’s having so much information to transmit to you? Amazing, is it not?

Let’s go through the history first. Professor Harald Hass of University Of Edinburgh(2010) gave the first ever demonstration of Li-Fi prototype at 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 photo detector is placed at the end of LEDs which receives, amplifies and processes  the data. It uses the 802.11 protocols 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 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 Li-fi wireless network  called BeamCaster in 2014. In January 2014, first mobile prototype of Li-Fi was launched.




1. Its range is very short 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 equipment.

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




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

The Li-Fi, once fully developed, will be very cheap but now its setup is very expensive. 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 Internet will change completely. Whether it will be able to survive or not is an important question yet to be answered! 🙂




-Anubha Maneshwar




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Anubha Maneshwar