LI-FI TECHNOLOGY

PRESENTED BY D.B.N.R.S.SESHA SAI

(ESWAR) Sk.Baji

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.

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.

WHY ONLY VLC?

Radio Waves

Infrared Rays

Visible Rays

Ultraviolet Rays X- Rays

Gama Rays

PRESENT SCENARIO

1.4 Million 5 Billion

WORKING PROCESS

TECHNOLOGIES USED IN LI-FI:

SIM-OFDM and Spatial modulation

ADVANTAGES

DISADVANTAGE

•PRESENCE OF LIGHT IS ESSENTIAL

DIFFERENCE BETWEEN THE TECHNOLOGIES

1. HOSPITALS(IN FEW MEDICAL INSTRUMENTS)

APPLICATIONS

2. IN AIRCRAFT CABINS

3. IN RF RESTRICTED ENVIRONMENTS

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

CONGESTION

5. STREET LAMPS(AS FREE ACCESS POINTS)

6. UNDER WATER

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.

ANY QUERIES……..

THANK YOU