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1LIFI TECHNOLOGY

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

DEFINITION

HISTORY Professor harald haas, from the university of edinburgh in the UK, is widely recognised as the original

founder of li-fi.

The general term visible light communication (vlc), includes any use of the visible light portion of the electromagnetic spectrum to transmit information.

The d-light project at edinburgh's institute for digital communications was funded from january 2010 to january 2012.

Haas promoted this technology in his 2011 ted global talk and helped start a company to market it.

Pure lifi, formerly pure vlc, is an original equipment manufacturer (oem) firm set up to commercialize li-fi products for integration with existing led-lighting systems.

By august 2013, data rates of over 1.6 gbit/s were demonstrated over a single colour LED.

DEVELOPMENT TEAM

Dr. Gordon Povey Prof. Harald Haas

Dr. Mostafa Afgani

Need OF LIFIIssues regarding radio spectrum

Capacity

Efficiency Security

Availability

Different Electromagnetic Spectrums and their potentiality

Radio Waves

Infrared Visible Ultraviolet X Rays Gamma Rays

In sufficient spectrum for increasing data

Low power application

Which is not used so far.

Used for hospitals and security checking

It is not used generally

Dangerous for human body

Properties Of LIFI

LIGHT-BASED WI-FI UNUTILIZED ELECTROMAGNETIC SPECTRUM IS

USED NO MAJOR ILL EFFECT

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Major Components Of LIFI System

I. SourceII. Receiver

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Source

1. Bulb: RF power amplifier circuit (PA)

2. Printed circuit board (PCB)

3. Enclosure

Receiver

1. A silicon photodiode, which shows good response to visible wavelength region serving as the receiving element.

Working Of LIFI System

LIFI Architecture The novel architecture of Li-Fi technology is based on the MLU, AL and Li-Fi cloud.

The MLU is extended to the ALs where every AL has their own Li-Fi cloud to provide internet and other services connectivity through light.

The main line is connected to the MLU and further it is extended to small nodes which are LED bulbs or lamps e.g. AL1, AL2, AL3 and AL4

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LIFI Architecture cont..

Dimension of LED Lamp or Bulb

Placement and positioning (PP) dimension

Internal structure design (ISD) dimension

Fixed Position Movable Position

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Fixed Position Movable Position

Internal Structure Design

APPLICATIONS OF LIFI

• Places where Wi-Fi isn’t allowed due to radiation concerns

• In invasive bio medical instruments

HOSPITALS

AIRLINES• Web access• Communication purpose

• News Updates• Updates about Natural Calamity• Emergency Communication in Subway

stations and tunnels, and other common dead zones

• Cheap high-speed Web access to every street corner

Street Lamp Post

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CONCLUSION• Li-Fi may not be able to replace conventional radios altogether, but it could turbo charge the

development of wireless television and make it easier to throw a wireless signal across an entire house.

• Large scale areas that are saturated with radio signals or that doesn’t permit them for security reasons could use Li-Fi as an alternate high-speed wireless network solution.

• 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.

THANK YOU FOR YOUR TIMEANY QUERIES……..