muneeb,bilal and talha presentation
TRANSCRIPT
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1 PRESENTATION ON LI – FI (LIGHT FIDEALITY)Presented by
MUNEEB SOHAIL (091) BILAL RAJAR (074) TALHA AHMED(065)
21 DECEMBER 2015“USMAN INSTITUTE OF
TECHNOLOGY”Affiliated with NED UNIVERSITY ENGINEERING & TECHNOLOGY
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2Content:- Why Li-Fi ??? Introduction of Li-Fi History of Li-Fi How Li-Fi Works ?? VLC Smart Phone Model Li-Fi v/s Wi-Fi Application of Li-Fi Advantages of Li-Fi Limitation of Li-Fi REFERENCES Conclusion
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3
“Introduction
To Li-Fi”
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4“Introduction to Li-Fi” Li-Fi basically known as “Light Fidelity” is an
outcome of 21st century. The basic ideology behind this technology is that
the data can be transmitted through the LED light whose intensity varies even faster than the Human-eyes.
In modern times, it is called as the optimized version of WI-FI .The advantageous thing is the wireless communication which decreases the cost enormously.
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5“Introduction(Cont….) there are more and more devices coming up
day-by-day the signals of Wi-Fi are being clogged up due to heavy traffic, there arised a need for an error free transmission technology. And the solution to this problem was the Li-Fi technology.
With LIFI is possible to encode the data into the light by varying the rate at which the LED’s flicker ON and OFF which is too quickly to be noticed by the human eye.
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7History of Li-Fi Professor Harald Haas, from the
University of Edinburgh in the UK, is widely recognised as the original founder of Li-Fi. He coined the term Li- Fi and is Chair man of Mobile Communications at the University of Edinburgh and co-founder of pure LiFi.
The consortium believes it is possible to achieve more than 10Gbps speed using this optical wireless technology also known as Li-Fi.
It gets affected if line of sight is not used, the speed of data transmission will reduce or data transmission will stop.
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8History(cont…) PureLiFi, formerly pureVLC, is an original
equipment manufacturer (OEM) firm set up to commercialize Li-Fi products for integration with existing LED-lighting systems.
Philips lighting company has developed a VLC system for shoppers at stores. They have to download an app on their Smartphone and then their Smartphone works with the LEDs in the store. The LEDs can pinpoint where they are at in the store and give them corresponding coupons and information based on where aisle they are on and what they are looking at.
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9
Why Li-Fi ??
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10=>Present Scenario
More than 1.8 Million more than 5 BillionRadio 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.
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11Different Electromagnetic
Spectrums and their potentiality
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WHY ONLY VLCRadio
Waves Infrared
RaysVisible Rays
Ultraviolet Rays X- Rays
Gama Rays
• Gama rays cant be used as they could be dangerous.• X-rays have similar health issues.• Ultraviolet light is good for place without people, but
other wise dangerous for the human body.• Infrared, due to eye safety regulation, can only be used
with low power.HENCE WE LEFT WITH THE ONLY THE VISIBLE – LIGHT SPECTRUM.
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How Li-Fi Works ???
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14Working of Li-Fi
This fantabulous idea first striked the mind of Haraald Haas from University of Edinburgh, UK, in his TED Global talk on VLC.His idea was very simple that if the LED is “on” then the digital 1 can be transmitted and if the led is “off” then the digital 0 can be transmitted.Led‟s can be switched on and off very quick.
For transmitting data this way all that we require is LED‟s and controller that code data into LED‟s.Parallel data transmission can be done by using array of LED‟s or by using red, green, blue LED‟s to alter light frequency with the frequency of different data channel.
Advancements and enhancements in this field generate a speed of 10 gbps! But amazingly fast data rates and lowering band widths are not the only reasons that enhance this technology.
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15Working(Cont…)
Lifi usually is based on light and so it can be probably implemented in articrafts and hospitals that are prone to inference from radio waves. Unlike Wi-Fi Li-Fi can work even under-water which makes it more advantageous for military operations.
Radio waves are replaced by light waves in data transmission called Li- Fi.
The data transmission is done through binary codes which involve switching on LED can be done by logic 1 and switch off using logic 0.
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16Architecture of Li-Fi
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17Li-Fi Environment
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18VLC SMARTPHONES
THE FIRST VLC SMARTPHONE WAS
PRESENTED BY CONSUMER ELECTRONICS IN
JANUARY, 2014 THE PHONE USES WYSIPS CONNECT – A
CLEAR THIN LAYER OF CRYSTAL GLASS IS
ADDED TO THE SMALL SCREENS SMARTPHONE MAKES THEM SOLAR
POWERED.SMARTPHONE COULD GET 15% MORE
BATTERY LIFE IN A DAYCAN COMMUNICATE USING LI-FI.
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Application of
Li-Fi
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24In Education Systems:
Li-Fi is the latest technology that can provide fastest speed internet access.
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25In Medical Application
Operation theatres (OTs) do not allow Wi-Fi due to radiation concerns. Usage of Wi-Fi at hospitals interferes with the mobile and pc which blocks the signals for monitoring equipments. So, it may be hazardous to the patient's health.
To overcome this and to make OT tech savvy Li-Fi can be used to accessing internet and to control medical equipments. This can even be beneficial for robotic surgeries and other automated procedures.
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26Cheaper Internet in Aircraft
The passengers travelling in aircrafts get access to low speed internet at a very high rate. Also Wi-Fi is not used because it may interfere with the navigational systems of the pilots.
In aircrafts Li-Fi can be used for data transmission. Li-Fi can easily provide high speed internet via every light source such as overhead reading bulb, etc. present inside the airplane.
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27Cheaper Internet in Aircraft
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28INDUSTRIES
USED IN RF RESTRICTED ENVIRONMENTS LIKE CHEMICAL INDUSTRIES,
NUCLEAR POWER PLANTS, PETROL PUMPS
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TRAFFIC SCENARIOIN TRAFFIC SCENARIO, LIFI CAN BE USED TO COMMUNICATE WITH THE LED LIGHTS OF CARS .
CARS CAN HAVE LED-BASED HEADLIGHTS, BACKLIGHTS AND CAN COMMUNICATE WITH EACH OTHER.
THIS MIGHT PREVENT ACCIDENTS, BY EXCHANGING INFORMATION, WHEN THE VEHICLES ARE TOO CLOSE
USING LIFI, STREET LIGHTS CAN BE USED TO SEND INFORMATION ABOUT THE ROAD CONDITION TO THE CAR.
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30Replacement of other
technologies Li-Fi doesn't work using radio waves. So, it can be
easily used in the places where Bluetooth, infrared, Wi-Fi, etc. are banned.
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31Advantages of Li-Fi
High Security Easy To Use Fast Data Transfer Reliable Harmless ness Low Cost
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32 Some Disadvantages of Li-Fi
Light can’t pass through objects. Connectivity while moving. Interferences from external light sources like
sun light, normal bulbs, and opaque materials in the path of transmission will cause interruption in the communication.
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33Conclusion
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 hotspot to transmit wireless data and we will proceed toward the cleaner, greener, safer and brighter future.
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34REFRENCES
Our Respected teacher’s Google Wikipedia Lificonsortium.org Purevlc.com ebookbrowse.com/an002-instrumentlighting-pdf-
d20428293
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“END OF PRESENTATION”