English presentation of the LI-FI TECHNOLOGY

2. 1. Introduction
2. How does LI-FI Works ?
3. 4 issues with radio waves
4. Alternative for radio waves
5. Overcoming the four issues with RW in LI-FI
6. Applications of LI-FI
7. Limitations of LI-FI
8. Conclusion.

3. FI

4.  LI-FI is a technology that uses the light emitting diodes to transmit the data
wirelessly.
 LI-FI is based on visible light communication(vlc).
 VLC is a data communication medium, which uses the visible light between
400 THz and 800 THz as optical carrier for data transmission
 This technology was invented by German physicist Harald Haas , from The
university of Rdinburgh, U.K .
 He demonstrated it in the year 2012.

8. • Cost and expensive
• Less bandwidth compared to other spectrums
• Insufficient spectrum for increasing data

9. •Millions of base stations consume huge amount
of energy for:
1. Transmitting the radio waves
2. To cool the base station cabins
•5% Efficiency

10. •Available within the range of base stations
•Limited availability
•Unavailable in aircrafts
•Lesssecure (passes through the walls )

13. Mobiles, laptops, tablets, and other PDAs can easily
connect with each other. The short-range network of
Li-Fi can yield exceptionally high data rates and higher
security.

14. Unlike Wi-Fi, Li-Fi doesn’t emit any electromagnetic
interference. And so it will not interfere with or by
medical equipments like MRI scanners.

15. Using Li-Fi, aircraft passengers can access high-speed
internet via lights fitted over their seats. It can even
be used to integrate the passenger’s smartphones
with an In-flight Entertainment (IFE) system.

16. Li-Fi can also work underwater where Wi-Fi doesn’t
work at all. Thus Li-Fi has thrown open a world of
possibilities for military/navigation operations.

17. New generation vehicles are coming with LED
headlights and taillights. Street lights and traffic lights
are also shifting to energy-efficient LEDs. So, Li-Fi
technology can be easily used for vehicle-to-vehicle
and vehicle-to-roadside sensor communications for
road safety and traffic management system.

18. • Light can't pass through objects
• Interferences from external light sources like sun
light and normal bulbs will cause interruption in
the communication.
• High installation cost of the VLC systems

19. Although there’s still a long way to go to make this technology a
commercial success, it promises a great potential in the field of
wireless internet. In fact, as per MarketsandMarkets analysis,
the Li-Fi market is expected to be worth more than $6 billion by
2018. A significant number of researchers and companies are
currently working on this concept, which promises to solve the
problem of lack of spectrum space and low internet connection
speed. Plus, it will also allow internet access in those places or
fields where radio based wireless isn’t allowed. One thing’s for
sure, Li-Fi is the future of mobile internet.