LiFi (Light Fidelity), is a wireless technology that transmits high-speed data using visible light communication (VLC). Achieving speeds of 224 gigabits per second. It is 100 times Faster than wi-fi. Light Bulbs could be used for delivering Data.Li-Fi is a new method of delivering data. It uses the visible spectrum rather than radio waves.
The Li-Fi system uses standard light-emitting diodes (LEDs) to transmit electronic data signals, which will enable users to access the internet through the ordinary lighting systems in schools, workplaces and homes.
LiFi benefits over WiFi
Li-Fi is not the replacement of Wi-Fi technology. It can be considered as the incredible companion of the WiFi technology. It operates between 380 nm to 780 nm optical range. It is used to exchange data incredibly, rapidly and at much lower power level compare to Wi-Fi.
With scientists achieving speeds of 224 gigabits per second in the lab using Li-Fi earlier this year, the potential for this technology to change everything about the way we use the Internet is huge.
And now, scientists have takenout of the lab for the first time, trialing it in offices and industrial environments in Tallinn, Estonia, reporting that they can achieve data transmission at 1 GB per second – that’s 100 times faster than current average WiFi speeds.
LiFi vs WiFi-Basic difference between LiFi ,WiFi
|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|