light fidelity technology (li - fi)
TRANSCRIPT
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