DATA TRANSMISSION THROUGH ILLUMINATION

PRESENTED BY: PRAVIN AHIRWAR STUDENT OF T.E CSE SSGBCOET BHUSAWAL

CONTENTS

INTRODUCTIONLITERATURE REVIEWBASIC CONCEPTWORKING OF LI-FIDISADVANTAGES OF OTHER SPECTRUMADVANTAGESDISADVANTAGESAPPLICATIONSCONCLUSIONREFERENCES

INTRODUCTION

Li-Fi means light fidelity.

It can be used as light based Wi-Fi.

Instead of radio waves it uses visible rays for transmission.

Data can be transmitted through LED light.

LITERATURE REVIEW

Professor Harald Haas from the University of Edinburgh coined the term Li-Fi in TED global talk in 2011.

Harald Haas continues to wow the world with the potential to use light for communication.

Prof.Harald Haas

BASIC CONCEPT

The on-off activity of LEDs enables a kind of data transmission using binary codes.

Switching on an LED is a logical ‘1’;switching it off is a logical ‘0’.

A light sensitive device (photo detector) receives the signal and converts it back into original data.

WORKING OF LI-FI

SENDING OF DATA

DISADVANTAGES OF OTHER SPECTRUMS

Insuffient spectrum for increasing data

Low power application

Which is not used so far.

Dangerous for human body Used for

hospitals

It is not used generally

ISSUES REGARDING RADIO SPECTRUM

Capacity

Cost and Expensive

Less Bandwidth compared to other spectrums

Insufficient spectrum for increasing data

Efficiency

Millions of base stations consume huge amount of energy for

1.Transmitting the radio waves 2.To cool the base station cabins

5% Efficiency

Availability Available within the range of Base stations Limited availabity Unavailable in aircrafts

Security Less secure(passes through the walls)

ADVANTAGES

Larger bandwidth (10,000 times the radio bandwidth)

High efficiency More availability NOT Harmful Highly secure

DISADVANTAGES

Light can’t pass through objects. Presence of Light is essential.There will be interference from sunlight.  You need special LEDs.High installation cost of the VLC systems.

APPLICATIONS

In Offices and Home as smart LED Lightings

In RF restricted Environments

In Traffic lighting

CONCLUSION

Overcomes the limitations of radio spectrum.

High speed of 10 Gbps can be achieved.

Li-fi can solve the for essential problems of wireless communications these days.

REFERENCES

[1] RECENT ADVANCEMENTS IN LI-FI TECHNOLOGYAKSHATA M SONNAD, ANJANA GOPAN, 3SAILAKSHMI N R, DIVYA S, AMBIKA R BMSIT

[2] A SURVEY ON TRANSMISSION OF DATA THROUGH ILLUMINATION - LI-FIM. MUTTHAMMA ,ASSISTANT PROFESSOR, DEPARTMENT OF ECE, GCET, HYDERABAD, A.P., INDIA

[3] LI-FI (LIGHT FIDELITY) TECHNOLOGY U.SUGANYA1, C.SUBHALAKSHMIPRIYA[4] LI-FI TECHNOLOGY:TRANSMISSION OF DATA THROUGH LIGHT

RAHUL R. SHARMA, RAUNAK, AKSHAY SANGANAL

THANK YOU