LI-FI TECHNOLOGY

NEHA SIDDIQUI BRINDA PATELAND

PPT BY:

CONTENTS:INTRODUCTIONLIGHT FIDELITYHISTORYWORKINGLIFI NETWORKS AND ROUTERSNEED FOR LIFISECURITYCOMPARISON OF LIFI WITH WIFI & BLUETOOTHADVANTAGES,DISADVANTAGES,LIMITATIONSAPPLICATIONSCONCLUSION

INTRODUCTIONLI-FI is a wireless communication ,a utility :Business lifeHospitalsResearch and developmentsecurityPersonal life

LI-FI (LIGHT FIDELITY):

LIGHT FIDELITY is a wireless and uses visible light communication.LI-FI can’t penetrate through the

walls

It is transmission of data through illumination by taking the fiber out of fiber optics by sending data through

a LED light bulb.This varies in intensity faster than

human eye can follow

HISTORY

Introduced by professor

HERLAND HASS at

university of Edinburgh.

Established in 2011 at

TED global talk ,promotion

of idea through TED helped

to start the company-PURE

LI-FI..

WORKING:

Operational procedure is very simple.If LED is ON digital data 1 is transmitted and if LED is OFF digital signal 0 is transmitted.A controller connected at the back side of these LED’s is used to code data.Also called as 5G optical communication.

LI-FI NETWORKS &

ROUTERS

LI-FI connectors and routers are the main

components for a network

optimal signal cannot penetrate through walls in order

to provide an optical WLAN , rooms need to be

connected to each other so routers are used.

server acts as a connector to external link like DSL

which covers radius of about 20meters & transmission

speed of 100mbps.

NETWORKING :

NEED FOR LI-FI?

Radio spectrum is congested ,

but the demand for wireless data

doubles each year.

Issues regarding radio

spectrum such as capacity ,

availability ,efficiency ,security

are solved using LIFI.

Speed of data transmission can

be increased.

SECURITY:The radio waves

penetrate through the

walls. They can be

intercepted and can be

used for negative

purposes. Hence

security cannot be

achieved at its

maximum leveling

spectrum

COMPARISON OF LI-FI WITH WI-FI & BLUETOOTH

ADVANTAGES:

•High speed connectivity of the rate

of 500mbps.

•Uses light rather than radio

frequency signals so are intolerant

to disturbances.

•Security is a side benefit of using

light for data transfer as it does not

penetrate.

•The issues of the shortage of radio

frequency bandwidth may be sorted

out by

LI-FI.

DISADVANTAGES:

•It can’t penetrate through walls.

LIMITATIONS:

•Only works if there is direct line of

sight(LOS).

•Data transmission can be easily

obstructed by opaque obstacles.

•The use of very high

frequencies(400-800THz) limits it to

very short distances and point to point communications only.

Suitable for small offices

and home use

USED IN RF AREAS LIKE INDUSTRIES , PETROCHEMICAL PLANTS ,

NUCLEAR POWER PLANTS,PETROL PUMPS,UNDERGROUND WATER…..

UNDERGROUND WATER

INDUSTRIES

PETROCHEMICALPLANTS

NUCLEAR POWERPLANTS

Whole airways

communication are

performed on basis of

radio waves ,passengers

may face the problem in

communication media,

so here LI-FI can be

replaced..

AIRCRAFTS:

STREET LIGHTS:

HOSPITALS:

COMMUNICATION AND

TRAFFIC CONTROL IN CARS

If LI-FI technology is used in

practical , every bulb will be an

alternative for radio waves and WI-FI

hotspots…

It provides simple , faster , efficient

wireless data communication & will

make us to proceed towards cleaner ,

greener , safer ,healthier , brighter

future…

CONCLUSION:

LI-FI