The document introduces Li-Fi technology, which uses light to transmit data wirelessly. It discusses how Li-Fi works using light bulbs and photo detectors, provides a brief history of Li-Fi from its introduction in 2011 to recent tests. Key advantages of Li-Fi over Wi-Fi are also presented, such as higher speeds, security, and reliability. Several applications of Li-Fi are described including use in offices, public spaces, underwater navigation, and traffic control. Limitations include shorter range requiring line of sight transmission and initially higher setup costs than Wi-Fi.

2. Presented By:
M. Saifullah
Shahrukh Naveed
M. Alliyan
Rana Ali
Adnan Iqbal

3. What is
Li-Fi?

4. Content:
• Introduction to Li-Fi
• Working of Li-Fi
• History of Li-Fi
• Li-Fi vsWi-Fi
• Applications of Li-Fi
• Advantages of Li-Fi
• limitations of Li-Fi
• Conclusions

5. Introduction of Li-Fi
• The concept of data transmission by using light was already given in 1990.
But it was not applicable because the internet was not introduced yet. But,
finally it is introduced in 2011 for the first time to the world.
• Today there are 1.4 million base stations of Li-Fi.

6. What is Li-Fi?
 Li-Fi is wireless communication technology. It utilizes light to transmit data.
 Li-Fi uses light communication system
and can be capable of transmitting data at a
very high speed, with the speed of visible
light, ultraviolet and infrared spectrums.
 Li-Fi may be called as most latest form of
internet (Wi-Fi).
 Li-Fi technology is able to transfer data at a rate of more than 250Gbit/s.

7. Working of Li-Fi………..
 Li-Fi uses light bulb as a light emitter.
 A Photo detector that detects light and transfer information to device.
 RF-Driver is used that works as a circuit that controls the digital and
analogue lighting.
 Power Supply supplies power to bulb to eject light.

8. Process of streaming…

9. History of Li-Fi
• Li-Fi technique is introduced in March 2011.
• Professor Harald Haas coined the term "Li-Fi" at his 2011TED GlobalTalk where he
introduced the idea of "wireless data transmission from every light".
• VLC technology was exhibited in 2012 using Li-Fi. By August 2013, data rates of
over 1.6 Gbit/s were demonstrated over a single color LED.
• In 2014,Mexican Company was able to transfer data up to 10 Gbit/s.
• In June 2018, Li-Fi passed a test by BMW plant in Munich.
• In August 2018, Kyle Academy in Scotland also tested Li-Fi.
• In June 2019, French company Oledcomm also tested their Li-Fi technology at 2019
Paris Air Show.

10. Li-Fi vs Wi-Fi
PARAMETER Wi-Fi Li-Fi
Speed Not very high Very High
Range Medium Low
Cost Costly Cheap
Security Not much secure(Easily
hackable)
More Secure (Not Hackable)
Reliability Reliable More Reliable
Connection between devices High High
Transmission Source Electromagnetic waves Light
Traffic Control Less (Due to less speed ) More (Due to high speed )

11. Facts of Li-Fi
Li-Fi is 100 times faster than Wi-Fi
Li-Fi is 10 times cheaper than Wi-Fi
Li-Fi is the Future of Internet.

12. Applications
• Traffic or vehicle control
• Hospitals
• Education
• Underwater applications
• Industries
• Offices
Applications of Li-Fi are following;

13. Applications of Li-Fi
Application of Li-Fi in Offices

14. Applications of Li-Fi
Li-Fi in Public(in airplanes , trains , etc.)
Li-Fi in Underwater navigation system, etc.
Li-Fi in traffic control system , etc.

15. Advantages
• High speed
• High power efficiency
• Larger bandwidth
• High security
• Cheaper
• High connection with other devices
• High reliability

16. limitations
Nothing in this world is perfect and so does Li-Fi
• Li-Fi has shorter range.
• It requires large cost to setup. But once it is installed it will never require
large cost.
• Light can not pass through the objects .That is why a user must be in
contact with light of Li-Fi bulb or user must be under the light of Li-Fi
source.

17. Conclusions:
• High speed of internet is achieved.
• It can be the future of latest internet generations.We can also say it a part of
5G.
• The applications of Li-Fi overall the world are increasing day by day.
• Li-Fi is a revolutionary invention. It is making worlds progress even faster.

18. THANKYOU