4. History
Harald Haas, form University of Edinburgh in the UK,
coined the term "Li-Fi" at his TED Global Talk where he
introduced the idea of "Wireless data from every light".
The general term Visible Light Communication (VLC),
whose history dates back to the 1880s, includes any use of
the visible light portion of the electromagnetic spectrum
to transmit information .
7. Li-Fi vs Wi-Fi
Operation
Application
Privacy
Data Transfer Speed
Frequency Of Operation
Data density
Coverage distance
System components
9. Applications
Education systems
Medical applications
Cheaper internet in aircrafts
Under water applications
Disaster management
Applications in sensitive areas
Traffic management
10. Advantages & Disadvantages
Advantages
Capacity : Light has 10000 times
longer bandwidth than radio –waves
Efficiency: Data transmission using
Li-Fi is very cheap.
Availability: Availability is not an
issue as light sources are present
everywhere
Security: Light waves do not
penetrate through walls.
Disadvantages
One of the major demerits of this
technology is that the artificial light
cannot penetrate into walls and
other opaque materials which radio
waves can do. So a Li-Fi enabled
end device (through its inbuilt
photo-receiver) will never be as fast
and handy as a Wi-Fi enabled device
in the open air. Also, another
shortcoming is that it only works in
direct line of sight.
11. Future Scope
As light is every where, and free to use , possibilities
increases to a great extent of the use of Li-Fi technology.
If this technology comes to practice each Li-Fi bulb will be
used as Wi-Fi hotspot to transmit wireless data. As the Li-
Fi technology will be used which will lead to a cleaner,
greener , safer and bright future and environment. The
concept of li-fi is attracting many people as it is free to
use without any license and faster means of data transfer.
If it develops more faster people will more and more use
this technology instead of Wi-Fi.
12. Conclusion
It has a bright chance to replace the traditional Wi-Fi
because as an ever increasing population is using wireless
internet, the airwaves are becoming increasingly clogged,
making it more and more difficult to get a reliable, high-
speed signal.
This concept promises to solve issues such as the shortage
of radio-frequency bandwidth and boot out the
disadvantages of Wi-Fi .
Hence the future applications of the Li-Fi can be
predicted and extended to different platforms and various
walks of human life.
