Li-Fi (Light Fidelity)The future technology In Wireless communication

Presented By :- Kapil Soni (2011)

Content ::

▪ Abstract

▪ Introduction

▪ Present Scenario

▪ How Li-Fi Works

▪ Why only VLC ?

▪ Comparison b/w Li-Fi & Wi-Fi

▪ Applications & Advantages of Li-Fi

▪ Conclusion

Abstract ::

▪ One germen phycist – Harald Haas has come up with a solution he calls “Data through Illumination”.

▪ Sending data through LED light bulb .

▪ It’s the same idea band behind infrared remote controls but far more powerful.

▪ Haas says his invention, which he calls D-Light, can produce data rates faster than 10 MB/Sec, which is speedier than your average broadband connection.

▪ Security would be snap – if you can’t see the light, you can’t access the data.

Introduction ::

First Question ::

What is Li-Fi ??

▪ Li-Fi stands for “Light-Fidelity”. Li-Fi refers to wireless communication systems using light as a medium instead of traditional radio frequencies.

▪ In other words, Li-Fi is a more advance technology than Wi-Fi which uses LED light bulbs for transferring data. It’s more faster.

Li-Fi (Light Fidelity) System ::

Present Scenario ::

1.4 Million

5 Billion

Present Scenario ::

▪ Radio Spectrum is congested but the demand for wireless data double each year. Every thing, it seems want to use wireless data but the capacity is dying up.

▪ So what can carry this excess demand in the future.

Another Question ::

Question ::

Who can Replace Radio Waves for wireless Communication ??

How Li-Fi Works ::

▪ Idea behind it is very simple , if the LED is on, you transmit a digital 1, if it’s off you transmit a 0.

▪ The LEDs can be switched on and off very quickly, which gives nice opportunities for transmitting data.

How Li-Fi Works ::

Why Only VLC ??

▪ VLC stands for Visible Light Communication.Radio

WavesInfrared

RaysVisible Rays

Ultraviolet Rays X-Rays Gama

Rays

Dangerous

Health Issue

Dangerous

Eye Safety Regulation

Currently in Use

Solution is Here

Comparison b/w Li-Fi & Wi-Fi

Li-Fi

▪ High Speed than Wi-Fi

▪ High Data Density than

Wi-Fi

▪ Highly Secure than Wi-Fi

Wi-Fi

▪ Less Speed than Li-Fi

▪ Less Data Density than

Li-Fi

▪ Less Secure than Li-Fi

Applications of Li-Fi..

In Traffic Light :-

▪ Traffic Lights can communicate to the car and with each other.

▪ Cars have LED-based headlights, and cars can communicate with each other and prevent accidents in by exchanging information.

Applications of Li-Fi..

Intrinsically Safe Environment :-

▪ Visible Light is more safe than Radio Waves, hence it can be used in places where RF can’t be used such as petrochemical plants, airplanes etc.

Public Internet Hotspot :-

▪ There are millions of street lamps deployed around the world.

▪ Each of these street lamp could be a free access point.

Applications of Li-Fi..

Undersea :-

▪ Li-Fi can even work underwater were Wi-Fi fails completely, thereby throwing open endless opportunities for military/navigation operations.

▪ Monitoring in Oceans.

Conclusion ::

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 hotspots to transmit

wireless data.

Thank You