Li-Fi Technology

Presented byURMILA.S.RS7 CS2ROLL NO:50LBSITW

(VISIBLE LIGHT COMMUNICATION)

o What is Li-Fi?o Historyo Why Li-Fi?o Why only visible light?o How Li-Fi workso Li-Fi vs Wi-Fio Applications of Li-Fio Conclusion

CONTENTS

WHAT IS Li-FI ?

o Li-fi basically known as “LIGHT FIDELITY”

o LI-FI is transmission of data through illumination, sending data through a LED light bulb that varies intensity faster than human eye can follow.

o The technology truly began during the 1990's in countries like Germany, Korea, and Japan where they discovered LED's could be added to send information.

o Professor Harald Haas, from the University of Edinburgh in the UK, is widely recognised as the original founder of Li-Fi.

o At TED Global Talk, Haas demonstrated a data rate of transmission of around 10Mbps.

HISTORY

WHY Li-Fi ?

PRESENT SCENARIO

1.4 Million Base Stations 5 Billion Devices

RADIOSPECTRUM-ISSUES

WHY ONLY VISIBLE LIGHT?

HOW Li-Fi WORKS

o On one end all the data on the internet will be streamed to a lamp driver when the led is turned on the microchip converts the digital data in form of light .

o A light sensitive device (photo detector) receives the signal and converts it back into original data. This method of using rapid pulses of light to transmit information wirelessly is technically referred as Visible Light Communication .

Li-Fi vs Wi-Fi

APPLICATIONS

Intrinsically Safe Environment

Visible Light is more safe than RF, hence it can be used in places where RF can't be used such as petrochemical plants .

Hospitals(In Few Medical Equipements) :

Hospitals(In Few Medical Equipements)

Potential Application of Li-Fi3. Airlines :

Whenever we travel through airways we face the problem in communication media ,because the whole airways communication are performed on the basis of radio waves. To overcome this drawback on radioways , li-fi is introduced.

Airlines

Whenever we travel through airways we face the problem in communication media ,because

the whole airways communication are performed on the basis of radio waves. To

overcome this drawback on

radioways , li-fi is introduced.

Potential Application of Li-Fi

4. On Ocean Beds :

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

On Ocean Beds Li-Fi can even wok underwater were Wi-Fi fails completely, thereby

throwing open endless opportunities for military/navigation operations.

Application

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

Street Lamps (As free Access Points) :

• Each of these street lamps could be a free access point.

Street Lamps (As free Access Points) There are millions of street lamps deployed around the world

Each of these street lamps could be a free access point.

Li-Fi GADGETS

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.

CONCLUSION