Li-Fi Vs Wi-Fi and the Differences between them.

What is Li-fi?

In July 2011 Herald Haas talked about a new Technology on Ted Global Talk that He and his team had come up with, He showed the audience on the show how data could be transmitted with the help of light just like Wi-Fi but Li-Fi (Light Fidelity) has more density and is based on Visual Light Communication (VLC), With Li-Fi the common house LED light bulbs work as the router, the Li-Fi bulbs have a chip installed in them that modulates the light imperceptibly for optical data transmission. Li-Fi delivers a high speed, bi-directional technology and has two components

·       One device with photodiode which will be able to receive light signals and a light source that’s equipped with a signal processing unit.

The LED bulbs help transmit the data which in turn is received by photoreceptors. It is 100 times faster than Wi-Fi and can reach speeds up to 224 gigabits per second.

Li-Fi Vs Wi-Fi

Wi-Fi

·       Wi-Fi stands for Wireless Fidelity

·       Wi-Fi transmits data through radio waves with the help of Wi-Fi router

·       Wi-Fi has interference issues from nearby access points

·       WLAN 802.11 a/b/g/n/ac/ad standard compliant devices

·       Wi-Fi is used for browsing with the help of Wi-Fi kiosks or Wi-Fi hotspots

·       Wi-Fi signals cannot pass through sea water, works better less dense area

·        In Wi-Fi, RF signal cannot be blocked by the walls hence the need to employ techniques to achieve secure data transfer

·       WLAN-11n offers 150 Mbps, About 1-2 Gbps can be achieved using WiGig/Giga-IR

·       Wi-Fi has the frequency of 2.4 GHz, 4.9 GHz and 5 GHz

·       Wi-Fi works in less dense environment due to interference issues.

·       Wi-Fi coverage distance is about 32 meters (WLAN 802.11b/11g), Vary based on transmit power and antenna type

·       Needs system components like routers to be installed, subscriber devices (Laptops, PDAs, and Desktops) are referred as stations.

Li-Fi

·       Li-Fi stands for Light Fidelity

·       Li-Fi transmits data through light with the help of LEB bulbs.

·       Li-Fi has no interference issues unlike radio frequency waves

·       Li-Fi uses IrDA (Infrared Data Association) compliant devices

·       Li-Fi is used in airlines, Undersea explorations, Operation theaters in the hospitals, office and home premises for data transfer and internet browsing

·       Almost has no Interference can pass through salty sea water, works in dense regions

·       In Li-Fi the light is blocked by the walls which gives you secure data transfer

·       Data transfer speed is about 1 Gbps

·       Li-Fi has a 10 thousand times frequency spectrum of the radi

·       Li-Fi works in high Dense environment

·       Coverage  distance is about 10 meters

·       System components comprises of Lamp driver, LED bulb or lamps and a photo detector, all of these components makes a complete Li-Fi system

  

Li-Fi Companies

·        Purelifi

·        Velmenni.

·        VLNComm LLC.

·        HAVR.

·        Lightbee.

·       To Be Srl.

·        LI-FI Tech.

·        OLEDCOMM.

Li-Fi-Xc system was released in October,2017. The device is a plug and play system that works with USB devices and is small enough to be integrated into your laptop, tablet or any other smart appliance. Stins Coman a Russian Company is selling its Li-Fi based solutions to the United states, Israel, China and other countries and the Indian IT minister tested the Li-Fi technology as well in 2018 in a poilet jointly conducted with the Indian institute of Technology- Madras and lightening company Philips India.

but it still has a long way to take over the world or our routers as its still in the experimental process and the commercial launch of the Li-Fi Technology has no set date but is expected till 2021.