Li-Fi – The Future Of Internet



The Internet is an important part of our life. Nowadays no one can live without the Internet. We can’t do anything without the Internet. Because the Internet made our life much easier than before. Can you imagine now our technology could offer Internet speed which is 100 times faster than Wi-Fi and current Internet Speed?! The answer is Yes. That is possible through the new technology Li-Fi! Developers achieved the speed of 224 GB using the technology called Li-Fi! So here in this article, we are going to explore some information about Li-Fi technology.

What Exactly is Li-Fi?

Well. Li-Fi is a Light Fidelity high-speed and fully networked Internet connectivity, hundred times faster than the current Wi-Fi networking. As you know the Wi-Fi is fully networked, bi-directional wireless communication technology where data has been transmitted using the radio waves. But in Li-Fi, the thing is different. Li-Fi is invented by the professor of the University of Edinburg, Harald Hass. Founded on 2011 in TED Global Talk. Li-Fi is the term some have used to label the fast and cheap wireless communication network.


How does Li-Fi Work?

Li-Fi uses visible light rays to transmit data. This is because the light has the capacity to transmit more amount of data in less time compared to radio waves used by networking technologies like Wi-Fi. The ceiling-based LED lighting fixture encodes and modulates data messages from the Internet as light output at rapid speeds to a receiving photo detector, which converts the changes in light intensity to electrical current. In turn, the electrical current is converted is converted into a binary data stream and sent to any attached computers or mobile devices. If you see any LED light source and if you provide a constant current to this LED bulb it provides you the constant brightness. As we chase the current that is flowing through this LED bulb then the illumination or the brightness of the LED bulb will change. This is the real principle behind this Li-Fi technology. So if no current or minimum current is flowing through the LED bulb than the brightness of the LED bulb and the brightness of the LED source will be minimum. That will be treated as the digital zero. So this digital zero transmitted at the receiver side. Similarly when the light bulb is On or we can say that the maximum amount of the current is flowing through this LED bulb then the illumination or the brightness of the LED bulb will be maximum and that will be treated as the digital 1. So whenever the LED is On the digital 1 will be transmitted at the receiver side. So in this way by flickering the LED light source very rapidly we can transmit data in the form of 1’s and 0’s to the receiver and if this flickering is happening at millions of times per second then we cannot see this flickering through our naked eyes! We can treat this LED bulb source as the normal regular bulb source.


What are the Advantages Of Li-Fi Over Other Networking Technologies?

1. Speed: – In the time of research, the researchers achieved the speed to 224 GBPS which can be enhanced by using the area of the LED source or from using the multiple colors of LED. If we compare with LTE, the maximum speed of the LTE 4G for the stationary user is 1 Gbps and 100 Mbps for the mobile users. These are just the theoretical maximum speed. In reality, whereas in India we are getting just 10 to 20 Mbps maximum speed through the LTE 4G networks. But in some foreign countries, the maximum speed range is from 40 Mbps to 50 Mbps through LTE. In case of Wi-Fi, the maximum speed supported by Wi-Fi is up to 1.3 Gbps maximum under 5 GHz band. These speeds are enough for our usage but in this era of internet, you may feel these speeds are insufficient. All the speeds which are mentioned above from LTE and Wi-Fi is still 10 times lesser compared to the Li-Fi.

2. Security: – As you know, Wi-Fi’s aren’t safe. Because the Wi-Fi uses the radio waves which are able to cross the walls and can easily be picked up by someone else. As we are using the visible light source in the Li-Fi these visible light source cannot cross the walls. So the users can get one more layer of the security and more secure data transfer.


So What’s the Conclusion?

Li-Fi may take more time to come in reality but still, it looks very promising. The researchers of Li-Fi achieved the speed of more than 224 Gigabyte speed per second which is 200 times faster than even Google fiber. If Li-Fi comes into reality and becomes widely available it would be the great invention on the internet where you can download more than 20 movies at a time within blinking of eyes! Amazing isn’t it?

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