BUILT MORE IDEA ON LI FI

1. PRESENTED
BY:
DEBRAJ
MAJUMDAR
(16905516039)
DEBARJITA
MAJUMDER
(16905516040)
Under guidance
of:
Prof. JAYJEET
SARKAR
[AEIE]

2. Content
 Introduction
 History
 How Li-Fi Works?
 Real Time Usage of Li Fi
 Comparison between Various Technologies
 How it is different?
 Wi-Fi vs Li-Fi
 Application
 Advantages
 Disadvantages
 Conclusion

3. • Li-Fi is a wireless optical networking technology that uses light-emitting diodes (LEDs) for
data transmission.
• Li-Fi is designed to use LED light bulbs similar to those currently in use in many energy-
conscious homes and offices.
• However, Li-Fi bulbs are outfitted with a chip that modulates the light imperceptibly for optical
data transmission.
• Li-Fi data is transmitted by the LED bulbs and received by photoreceptors.

4. History
• Professor Harald Haas, from the University of Edinburgh in the UK, is
widely recognized as the original founder of Li-Fi.
• Haas promoted this technology in his 2011 TED Global talk and helped start
a company to market it.
• The first Li-Fi smart phone prototype was presented at the Consumer
Electronics Show in Las Vegas from January 7–10 in 2014.

5. How Li-Fi Works?
Figure No:1 Symmetric Diagram of working of Li-FI

6. Real Time Usage of Li-Fi
Figure 2: All domestic system is connected with Li-Fi

7. Wi-Fi 150 Mbps
Bluetooth 3 Gbps
IrDA 4 Gbps
Comparison between various
Technologies
WIRED
WIRELESS(CURRENT)
WIRELESS(FUTURE)
Fire wire 800 Mbps
USB 3.0 5 Gbps
Thunderbolt 20 Gbps
Li-Fi 10 Gbps
Giga-IR 1 Gbps
Wi-Gig 2Gbps

8. How Li-Fi is different?
 Li-Fi technology is based on LEDs for the transfer of data.
 The transfer of the data can be with the help of all kinds of
light, no matter the part of the spectrum that they belong.
 That is, the light can belong to the invisible, ultraviolet or the
visible part of the spectrum.

9. PARAMETER LI-FI WI-FI
1. MEDIUM THROUGH WHICH DATA
TRANSFER
Light Radio Wave
2. PRIVACY More Secure Less Secure
3. DATA TRANSFER SPEED About 1Gbps 150Mbps
4. FREQUENCY 10THz 2.4GHz,4.9GHz,5GH
z
5. COVERAGE DISTANCE About 10meters About 32meters

10. Applications
Communication in Deep Water
Li-Fi is used in Airlines
Li-Fi is used in Rail Station Li-Fi is used in Office

11. Advantages
 High data transmission rates of up to 10Gbps can be achieved.
 Li-Fi has low implementation and maintenance costs.
Disadvantages
Light can't pass through objects.
A major challenge facing Li-Fi is how the receiving device will
transmit back to transmitter.

12. Conclusion
 The possibilities are numerous and can be explored further.
 If his technology can be put into practical use, every bulb can be
used something like a Wi-Fi hotspot to transmit wireless data and
we will proceed toward the cleaner, greener, safer and brighter
future.

13. References
 www.wikipedia.com
 www.profolus.com/topics/advantages-and-
disadvantages-of-li-fi/
 www.slideshare.net/rr140688/lifi-ppt
 www.tcoe.in/sites/default/files/lifi.pptx

14. Thank You!
DEBRAJ MAJUMDAR(39) &
DEBARJITA MAJUMDER(40)
debraj.majumdar@aot.edu.in
Debarjita.majumder@aot.edu.in
Dept of AEIE