How AI, OpenAI, and ChatGPT impact business and software.
LIFI
1. Prepared by: Manje Gowda K.RPrepared by: Manje Gowda K.R
Dept. of:Dept. of: Electronics & CommunicationElectronics & Communication
2. Introduction
History
Construction
Working Process
Li-Fi v/s Wi-Fi
Applications
Advantages
Limitations
Conclusion
3. Light-Fidelity
LI-FI is transmission of data through
illumination, sending data through a smart LED
light bulb that varies intensity faster than human
eye can follow.
Works on the principle of VLC
4.
5.
6. Introduced by Professor Herald hass, at the university of
Edinburgh.
Established in 2011 TED global talk
The promotion of idea through TED helped to start a company,
Pure LiFi
In October 2011, few companies and industries group formed
Li-Fi consortium to promote the high speed optical wireless
systems
Prof. Harald Haas
University of Edinburgh.
7. All the data from Internet is
streamed into lamp driver.
Data from internet is used to
modulate the intensity of LED
light source.
Thus by fast and subtle
variations of current, optical
output can be made to vary at
extremely high speed
The photodetector picks up the
signal
The receiver dongle then
converts the tiny changes in
amplitude into a data stream.
8.
9.
10. LIFI can be used in
sensitive areas such as aircrafts for data transmission
without causing interference
Places where it is difficult to lay optical fibers like
operation theaters
Traffic scenarios, thereby reducing accidents
Underwater applications where radio waves cannot
propagate.
Industries like petrochemical plants, nuclear power plants ,
petrol pumps etc
11. In traffic scenario, LIFI can be used
to communicate with the LED lights of
cars .
Cars can have LED-based
headlights, backlights and can
communicate with each other.
This might prevent accidents, by
exchanging information, when the
vehicles are too close
Using LIFI, Street lights can be used
to send information about the road
condition to the car.
12. Downloading notes from blogs of teachers
Often it is necessary to download
lecture notes from the blogs of
respective teachers. With Li-Fi, the
download can be done in the hall itself
Interactive classroom with interconnected
devices
The classroom will be more interactive
with the real-time interconnectivity
between 500 devices
Sharing views & queries with the entire class
Each person’s queries, views and
clarifications can be shared not only
with the teacher, but with the entire
class.
13. Used in RF restricted environments like chemical industries,
nuclear power plants, petrol pumps
14. Li-Fi can even work underwater were Wi-Fi
fails completely, thereby throwing open
endless opportunities for military/navigation
operations.
15. The whole airways
communication are performed on
the basis of radio waves.
Hence passengers face the
problem in communication media.
This problem can be overcome
by using Li-Fi, since light waves
will not interfere with radio waves.
16. Data rate greater than 10 Gbps; Theoretically allowing HD
film
to be downloaded in 30 seconds
Can be used anywhere, even in RF restricted areas; Since light
waves will not interfere with radio waves.
Mostly LED light bulbs are used, which consumes less energy.
Hence cost efficient.
As light waves cannot penetrate through walls, the data cannot
be intercepted; Thus provides secured communication.
Efficient alternative to radio based wireless; since it is quick
and reliable.
17. Visible light cannot penetrate through solid objects.
A major challenge of LiFi is how the receiving device will
transmit back to transmitter.
Interferences from external light sources like sunlight, in the
path of transmission will cause interruption in the
communication.
Data transmission can be easily blocked by any object placed in
front of LED source.
18. Thus, if Li-Fi technology is put into practical use, every bulb
can be used as an alternative to Wi-Fi hotspots. It provides
simple, faster and efficient wireless data communication. Li-Fi
will make us to proceed towards the cleaner, greener, safer and
brighter future.