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Li-Fi Internet Technology-Everything You Need to Know

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Recently we hear a lot about LiFi. We read news reports claiming that this new technology will provide internet speed which would be 100 times more than current speed of Wifi.  So the obvious question is what LiFi is and what is so special about this LiFi?

Image via lgsports.ca
Image via lgsports.ca

Before getting into the depth of LiFi internet technology, first we need to understand how WiFi works and what the current problem a user faces when he or she uses WiFi. Just think?

Representational image via tuckerlegal.com
Representational image via tuckerlegal.com

So What WiFi is?

Image via windroidica.in
Image via windroidica.in

In short, the full form of WiFi is Wireless Fidelity and it transmits data using radio waves with the help of WiFi router.

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And now what is LiFi Technology?

Image via newson247.com
Image via newson247.com

The full form of Li-Fi is Light Fidelity. In fact, it is a light-based communication technology, which uses light waves instead of radio waves to deliver data. It uses the visible light spectrum which can transmit data at the capacity which is 10,000 times greater than that available within the radio spectrum. To establish a Lifi connection, we only need to turn on a LED bulb. No need to router or other devices.

Image via thepotomacreporter.com
Harald Hass, Image via thepotomacreporter.com

The term Li-Fi was coined by physicist Harald Hass back in 2011.

How fast the internet connection speed can be using LiFi?

Image via thetimesgazette.com
Image via thetimesgazette.com

A recently conducted test of Li-Fi technology has shown that it can attain internet connection speeds of up to 1Gbps – that’s 100 times faster than the standard Wi-Fi speed. In laboratory conditions, Li-Fi could theoretically reach speeds of up to 224Gbps. Yup! Its 224gbps!!!!

Problems we face when we use WiFi and what solutions LiFi offer

Image via youtube.com
Representational image of slow wifi. Image via youtube.com

When we use WiFi, we notice that our Wi-Fi networks are getting more and more crowded, if we connect many devices like laptop, computers, smart phones, and tabs. In WiFi connections all devices directly competes for access to available bandwidth. So if there are more connections then there is the slower browsing and download speed for all. Let’s see the example of a meeting room. It is attended by many people and too many devices got connected to a WiFi network and it results in slow speed for all.

Image via sciencealert.com
Image via sciencealert.com

But at the same time, Li-Fi technology won’t face this problem of slowing speed because it has greater number of available access points. Here, each pool of light provides full data rates to users. So, in case of meeting also a user won’t face the issue like slow speed.

Image via techworm.net
Image via techworm.net

Li-Fi is also potentially much more energy efficient than Wi-Fi. WiFi transmits data using radio waves with the help of WiFi router. To establish a WiFi connection, it requires a router to be installed. But in case of LiFi, a connection could be initiated by simply turning on a LED. Yup a LED bulb and photo detector to receive the bandwidth will make up a complete LiFi system.

Image via phys.org
Image via phys.org

In the case of WiFi, Interference is very high and that’s why it is mostly used only in internet browsing with the help of WiFi spot. But in case of LiFi interference is very less. That’s why it can be broadly used in airlines, undersea explorations and other works along with office and home for data transfer and internet browsing.

Image via theodysseyonline.com
Image via theodysseyonline.com

In LiFi technology, light signals are blocked by the walls and that’s why it provides more secure data transfer but in case of WiFi, radio signal cannot be blocked by the walls and hence it is less secure in comparison to LiFi. So finally we can say that LiFi technology is the future of internet speed.

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