LI-FI TECHNOLOGY

BY

AJITH KUMAR R.

CONTENTS

• PREFACE

• LI-FI WHAT AND WHY ?

• HISTORY OF LI-FI

• WORKING TECHNOLOGY

• THE ABODE FOR INTERNET

• SECURITY

• WIRELESS TECHNOLOGIES

• COMPARISON BETWEEN LI-FI

& WI-FI

• GAINS

• LOSES

• APPLICATIONS

• CONCLUSIONS

• CREDITS AND SOURCE

PREFACE

This presentation is delivered to you for improving

the knowledge about LI-FI technology which is going to produce a revolution in the network world .

LI-FI WHAT AND WHY?

• LI-FI, or "light fidelity", refers to wireless communication systems.

• LI-FI is expected to be ten times cheaper than Wi-Fi.

• It is used in electromagnetic sensitive areas.

• The system relies on light to send and receive data wirelessly.

• LI-FI is ten times faster than Wi-Fi.

Harald Haas of University of Edinburgh-Founder of LI-FI

HISTORY

• The founder of LI-FI was Harald Haas of University of Edinburgh.

• They set up a company named Visible Light Communication(VLC) to explore the technologies using light in 2011.

• LI-FI promises to be cheaper and more energy-efficient than existing wireless radio systems.

• The bandwidth of Visible light is 10,000 times bigger than the radio frequency.

• Prof. Haas Harald quotes that evenly spaced LED transmitters could provide consistent internet connectivity.

THE ABODE FOR INTERNET

• LI-FI technology transmits data wirelessly at high speeds with the use of light emitting diodes.

• With the invention of new LI-FI technology, we will soon find light bulbs of a car, light lamps in our rooms, lights in subway, flashlight of our mobiles and any other light source are providing internet access at very high speed.

SECURITY

• Secure data transmission is a critical and increasingly challenging issue. • Today’s wireless technology uses common radio waves to carry sensitive and

private data from one source to another.

• Radio waves easily transmit through solid objects such as walls, leaving wireless data vulnerable to collection by unauthorized entities.

• Light transmission does not penetrate solid objects and can be contained within a given area, adding an additional layer of security and protection.

WIRELESS TECHNOLOGIES

Wireless(current) Speed Density

• Wi-Fi – IEEE 802.11n 150 Mbps * • Bluetooth 3 Mbps ** • IrDA 4 Mbps ***

Wireless(future) • WiGig 2 Gbps **

• Giga-IR 1 Gbps ***

• LI-FI <10Gbps ****

COMPARISON BETWEEN LI-FI & WI-FI

Wireless Fidelity(Wi-Fi)

• Wi-Fi network makes use of radio waves to transmit information across a network.

 

• Wi-Fi can be used in private homes, institutions and other commercial areas.

 • Wi-Fi is expensive compared to LI-FI.

Light Fidelity(LI-FI) 

• LI-FI uses light from light emitting diodes for transmitting information across a network

 

• LI-FI can be used in electromagnetic sensitive areas.

•  LI-FI is 10 times cheaper than Wi-fi.

GAINS

• Best advantage of LI-FI Technology will be accessing internet at high speed in those areas where optical fires are not easy to install.

• LI-FI technology can also be used to extend wireless networks at your home, office or university.

• LI-FI Technology can also be used to control traffic conditions by placing this new technology into the LEDs of cars.

• LI-FI can be used in electromagnetic sensitive areas such as in aircraft or nuclear power plants, without causing interference.

CHALLENGES

• LI-FI technology is requires a prefect line-of-sight to transmit data.

• Other major challenge which probably could be faced by this new LI-FI technology is, how optimally data can be transferred back to the

transmitter.

• LI-FI cannot penetrate through solid objects .

• This provides data security . But apart from this this also proves as a difficulty for data transmission.

APPLICATIONS

COMMON USES• Can be used in the places where it is difficult to lay the optical fiber like

hospitals. Used in operation theatres

• In traffic signals LI-FI can be used which will communicate with the LED lights of the cars and accident numbers can be decreased.

• Thousand and millions of street lamps can be transferred to LI-FI lamps to transfer data.

• Can be used for data transmission in aircrafts.

CONCLUSION

• If this technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data.

• We will proceed towards a cleaner, greener, safer and brighter future.

• This allow internet where traditional radio based wireless isn’t allowed such as aircraft or hospitals.

CREDITS & SOURCE

SOURCE:

• www.wikipedia.com

• www.google.com

• www.googleimages.com

• www.bbc.com

ANY QUERIES