What is Li-Fi Technology?
Li-Fi aka ‘Light Fidelity’, is a wireless communication technology which uses light to transmit data between devices. It was launched in the year 2011 by Harald Hass. It sends light at high speed in ultraviolet, visible light, and infrared spectrums.
Features of Li-Fi
§ Li-Fi technology allows the user to
connect to internet using several devices like streetlights, lamps or LED
televisions, and it is faster and safer than Wi-Fi.
§ For surfing, the user has to show the
mobile or tablet toward the light bulb.
§ The bandwidth and speed are high in
the frequency of about 200000 GHz, which transmits data faster.
§ Li-Fi changes the individual's
lifestyle by the user, allowing them to connect to the internet where
electromagnetic radiation is prohibited.
§ It is used to find a location. LED
lights help to get traffic information, connecting various home appliances like
refrigerators and dishwashers to form a network.
§ The art lighting helps to connect
mobiles which display the piece of information or history.
§ The sensitive and confidential data
is transferred more securely.
§ The lighting in shops helps the user
know more about products and discounts.
§ Light waves have the facility to
travel in water than waves.
§ Various places like hospitals,
airports, city streets, etc., use light waves extensively.
Advantages of Li-Fi
·
The
speed of Li-Fi is about 224 Gbit/s, where 1.5 Gbit is downloaded in thousands
of seconds.
·
Few
components are required, and less energy is used for the Li-Fi facility, where
one can turn on the light.
·
Easily
accessible, one can convert the light fitting into an internet connection
point.
·
Increased
bandwidth where it can transmit a large volume of data with a light spectrum of
10,000 times wider than the radio spectrum.
·
Reliability
is more, where communication is performed without interruptions, making the
Li-Fi more stable.
·
No
interruptions are occurred in radio communications by electronic light.
·
No
cable is needed where it can operate with infrared light, which is not visible
to the human eye.
·
The
internet connection is available through light, so it avoids the collapse of
the radio spectrum.
Working process of Li-Wi technology
An LED
device is connected to the device and then is related to the internet. The data
on the internet flows in the device into the bulb, which is carried by light
waves. The wave containing the date falls on a receiver connected to the
computer.
Disadvantage of Li-Wi
§ Li-Wi usage in nasty weather or harsh
lighting condition is impossible.
§ The specialized LEDs are required to
operate this technology correctly.
§ During the night times, the working
process may be a little difficult
§ Some more devices are required for functionality.
§ The user cannot move to another room
unless the presence of a wired bulb.
§ It cannot pass through objects
§ Installation cost is high in VLC
system
Parameters in Li-Fi
|
Parameter |
Li-Fi |
|
Speed |
High |
|
Range |
Low compared to Wi-Fi |
|
Data density |
High |
|
Reliability |
Medium |
|
Security |
High |
|
Obstacle interference |
High |
|
Transmit/Receive the power |
High |
|
Device-device connectivity |
High |
Applications of Li-Fi
o
Li-Fi
is used in modern medical instruments
o
In
aircraft, used for data transmission
o
Used
in Petroleum or chemical plants where other transmissions or frequencies can be
hazardous
o
They
are used in traffic signals, which are used to communicate with the car's LED
lights, and accidents can be decreased.
o
GPS-based
service is used to track location.
o
Underwater
communication
o
RF
spectrum relief
o
It
is used effectively where it is difficult to lay the optical fibre cable.
Future Developments
·
It’s
a blooming technology which is quick and reliable for a greener future.
·
It's
an efficient alternative to radio-based wireless
Summary
If this
technology is implemented, light will play a significant role. As light is the
primary source of this technology, it is advantageous and implementable in
various fields where Wi-Fi can't be done with technologies. Due to its enormous
features, it can be used in education, industrial, medical, and many other
fields.
0 Comments