Lifi?What is it?
If you’re currently not satisfied with how your Wi-Fi network works, you will be relieved to know that there’s a new innovation now that overpowers normal Wi-Fi speed. Introducing the Li-Fi, a new technology that is 100 times faster than the Wi-Fi.
This new technology offers a speed of up to 224GB per second, which is enough to download 18 movies in just a second. Edinburgh University professor Harald Haas invented the Li-Fi or Light Fidelity using LEDs as the medium for sending data at an incredible speed.
Aside from being energy efficient, the Li-Fi is seen as the future of the current Wi-Fi.
The difference between the two services is their ability to manage user traffic that greatly affects their individual speed. The Wi-Fi service uses an unlicensed radio spectrum of 5 GHz while the Li-Fi uses visible light that range from 400 to 800 THz.For more information go Here
How long we have to wait until the Li-Fi is implemented remains to be the question, but the idea of a faster internet is already there and all it needs is some tweaking to make it actually work in volumes.
Following table mentions feature comparison between both:
|Full form||Light Fidelity||Wireless Fidelity|
|Operation||LiFi transmits data using light with the help of LED bulbs.||WiFi transmits data using radio waves with the help of WiFi router.|
|Interference||Do not have any intereference issues similar to radio frequency waves.||Will have intereference issues from nearby access points(routers)|
|Technology||Present IrDA compliant devices||WLAN 802.11a/b/g/n/ac/ad standard compliant devices|
|Applications||Used in airlines, undersea explorations, operation theaters in the hospitals, office and home premises for data transfer and internet browsing||Used for internet browsing with the help of wifi kiosks or wifi hotspots|
|Merits(advantages)||Interference is less, can pass through salty sea water, works in densy region||Interference is more, can not pass through sea water, works in less densy region|
|Privacy||In LiFi, light is blocked by the walls and hence will provide more secure data transfer||In WiFi, RF signal can not be blocked by the walls and hence need to employ techniques to achieve secure data transfer.|
|Data transfer speed||About 1 Gbps||WLAN-11n offers 150Mbps, About 1-2 Gbps can be achieved using WiGig/Giga-IR|
|Frequency of operation||10 thousand times frequency spectrum of the radio||2.4GHz, 4.9GHz and 5GHz|
|Data density||Works in high dense environment||Works in less dense environment due to interference related issues|
|Coverage distance||About 10 meters||About 32 meters (WLAN 802.11b/11g), vary based on transmit power and antenna type|
|System components||Lamp driver, LED bulb(lamp) and photo detector will make up complete LiFi system.||requires routers to be installed, subscriber devices(laptops,PDAs,desktops) are referred as stations|