1. LI-FI TECHNOLOGY
 D.B.N.R.S.SESHA SAI (ESWAR)
 Sk.Baji

2. WHAT IS LI – FI ?
• LI-FI is transmission of data through illumination,
sending data through a LED light bulb that varies in
intensity faster than human eye can follow.

3. INTRODUCTION TO LI-FI
• THE PURPOSE BEHIND COMING UP
WITH THE IDEA OF LI-FI IS TO ALLOW
THE EXCHANGE OF DATA BETWEEN
SEVERAL DEVICES AT HIGHER SPEED.
• LI-FI IS A TERM SOME HAVE USED TO
LABEL THE FAST AND CHEAP
WIRELESS COMMUNICATION SYSTEM,
WHICH IS THE OPTICAL VERSION OF
WI-FI.
• LI-FI IS BASED ON VISIBLE LIGHT
COMMUNICATION (VLC)
TECHNOLOGY.

5. Radio
Waves
Infrared
Rays
Visible
Rays
Ultraviolet
Rays
X- Rays
Gama
Rays

6. PRESENT SCENARIO
1.4 Million 5 Billion

7. WORKING PROCESS

8. TECHNOLOGIES USED IN LI-FI:
SIM-OFDM and Spatial modulation

9. ADVANTAGES

10. DISADVANTAGE
• PRESENCE OF LIGHT IS ESSENTIAL

11. DIFFERENCE BETWEEN
THE TECHNOLOGIES

12. 1. HOSPITALS(IN FEW MEDICAL
INSTRUMENTS)
APPLICATIONS

13. 2. IN AIRCRAFT CABINS

14. 3. IN RF RESTRICTED ENVIRONMENTS

15. 4. IN VEHICLES AND TRAFFIC LIGHTS,
REDUCING ACCIDENTS AND
TRAFFIC CONGESTION

16. 5. STREET LAMPS(AS FREE
ACCESS POINTS)

17. 6. UNDER WATER

18. CONCUSSION
The possibilities are numerous and can be explored further.
If this 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.