LI-FI ( LIFI) TECHNOLOGY

BY: EL ABIDI Farid & EL HARTI Mohammed Amine

MOHAMMADIA SCHOOL OF ENGENEERS - MOROCCO

PLAN:1. Introduction2. How does LI-FI Works ?3. 4 issues with radio waves4. Alternative for radio waves5. Overcoming the four issues with RW in LI-FI6. Applications of LI-FI7. Limitations of LI-FI8. Conclusion.

INTRODUCTION:

What IS LI-FI ?

LI-FI is a technology that uses the light emitting diodes to transmit the data wirelessly.

LI-FI is based on visible light communication(vlc).

VLC is a data communication medium, which uses the visible light between 400 THz and 800 THz as optical carrier for data transmission

This technology was invented by German physicist Harald Haas , from Theuniversity of Rdinburgh, U.K . He demonstrated it in the year 2012.

A LI-FI ENVIRONMENT:

HOW DOES IT WORKS ?

ISSUES WITH RADIO WAVE:

CAPACITY

AVAILABILITY

EFFICIENCY

SECURITY

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 waves2. To cool the base station cabins

•5% Efficiency


Availability:

•Available within the range of base stations

•Limited availability

•Unavailable in aircrafts

Security:•Less secure (passes through the walls )


ALTERNATIVES FOR RADIO WAVES :

OVERCOMING THE FOUR ISSUES WITH RW IN LI-FI

APPLICATIONS OF LI-FI:

Mobile Connectivity:

Mobiles, laptops, tablets, and other PDAs can easily connect with each other. The short-range network of Li-Fi can yield exceptionally high data rates and higher security.


Hospital and Healthcare:

Unlike Wi-Fi, Li-Fi doesn’t emit any electromagnetic interference. And so it will not interfere with or by medical equipments like MRI scanners.


Aviation:

Using Li-Fi, aircraft passengers can access high-speed internet via lights fitted over their seats. It can even be used to integrate the passenger’s smartphones with an In-flight Entertainment (IFE) system.


Underwater Communication:

Li-Fi can also work underwater where Wi-Fi doesn’t work at all. Thus Li-Fi has thrown open a world of possibilities for military/navigation operations.


Vehicles & Transportation:

New generation vehicles are coming with LED headlights and taillights. Street lights and traffic lights are also shifting to energy-efficient LEDs. So, Li-Fi technology can be easily used for vehicle-to-vehicle and vehicle-to-roadside sensor communications for road safety and traffic management system.

LIMITATIONS OF LI-FI :

• Light can't pass through objects

• Interferences from external light sources like sun light and normal bulbs will cause interruption in the communication.

• High installation cost of the VLC systems

CONCLUSION :

Although there’s still a long way to go to make this technology a commercial success, it promises a great potential in the field of wireless internet. In fact, as per MarketsandMarkets analysis, the Li-Fi market is expected to be worth more than $6 billion by 2018. A significant number of researchers and companies are currently working on this concept, which promises to solve the problem of lack of spectrum space and low internet connection speed. Plus, it will also allow internet access in those places or fields where radio based wireless isn’t allowed. One thing’s for sure, Li-Fi is the future of mobile internet.

THANK YOU FOR YOUR TIME

ANY QUERIES……..

LI-FI ( LIFI) TECHNOLOGY

Technology