Li-Fi – Light Fidelity (Animated)

LiFi – Light Fidelity

Presented By:- Mohammed Adnan A. Khan

Email id: [email protected]

https://www.facebook.com/aadnaan

CONTENTS

INTRODUCTION CURRENT SCENARIO WORKING COMPARISON ADVANTAGES & APPLICATIONS LIMITATIONS CONCLUSION & QUESTIONING

INTRODUCTION

Li-Fi, or light fidelity, is 5G visible light communication systems using light from light-emitting diodes (LEDs) as a medium to deliver networked, mobile, high-speed communication in a similar manner as Wi-Fi and Optical fiber.

Li-Fi could lead to the Internet of Things.

WHAT IS IT?

INTRODUCTION

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

Professor Harald Haas

Original founder of Li-Fi.

Chair of Mobile Communications at the University of Edinburgh.

Co-founder of pureLiFi.

HISTORY

Prof. Harald HaasUniversity of Edinburgh,U.K

CURRENT 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 drying up.

1.4 Million Base Stations 5 Billion

Current Radio Spectrum-Issues

Availability

Security

Capacity

Efficiency

Radio waves

Cost and Expensive

Less Bandwidth compared to other spectrums

Insufficient spectrum for increasing data

Millions of base stations consume huge amount of energy for • Transmitting

the radio waves• To cool the base

station cabins• 5% Efficiency

Available within the range of Base stations

Limited availability

Unavailable in aircrafts

Less secure(passes through the walls)

CURRENT SCENARIO

WORKING - VLC LiFi

TRANSMITTER RECIEVER/RECEPTOR END

IMPLEMENTATION – Large scale

Internet Data feed

PLC (Power line comm.)

VLC Visible Light Comm.ISP

VLC- Setup Overview

VLC- Setup Overview

68

Comparision between Li-Fi and Wi-Fi

Li-Fi can be thought of as a light-based Wi-Fi. That is, it uses light instead of radio waves to transmit information.

Instead of Wi-Fi modems, Li-Fi would use transceiver-fitted LED lamps that can light a room as well as transmit and receive information.

WI-FI is great for general wireless coverage within buildings, and li-fi is ideal for high density wireless data coverage in confined area and for relieving radio interference issues .

So the two technologies can be considered complimentary.

APPLICATION AREAS

LiFi Technology is still in its infancy .However some areas where it seems perfectly applicable are:-

Traffic Lights & Flow Management:-

Traffic lights can communicate to the car and with each other. Cars have LED-based headlights, LED-based cack lights, and cars can communicate with each other and prevent accidents in by exchanging information.

DAYTIME RUNNING LIGHTS (DRL)

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 .

APPLICATION AREAS

Hospitals(In Medical Equipements) :

APPLICATION AREAS

CT SCANNER

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 radio waves , li-fi is introduced.

APPLICATION AREAS

APPLICATION AREAS

On Ocean Beds :

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

APPLICATION AREAS

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.

LIMITATIONS & CHALLENGES

Light can't pass through objects.

Interferences from external light sources like sun light, normal bulbs, and opaque materials in the path of transmission will cause interruption in the communication.

Li-Fi requires line of sight.

High installation cost of the VLC systems.

A major challenge facing Li-Fi is how the receiving device will transmit back to transmitter.

CONCLUSIONThe 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

QUESTIONING:-

ANY QUERIES?