Light Fidelity ( Li-Fi )
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The Future Of Wireless TechnologyLight Fidelity Shamil Ahammad K
S7 | 25| 90012065
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Introduction
Research Began in 1990s
Publicly introduced and demonstrated in July 2011 at Global TED Talk
5G Optical Communication
No optical fibre
Wireless Communication
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Introduced Publicly In July 2011 Global TED Talk
Prof. Harald HaasProfessor, University of Edinburgh
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Li-Fi is a Visible Light Communic-ation
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Present Scenario of Radio-spectrum
CAPACITY
BANDWIDTHSHORTAGE AVAILABIL-
ITY EFFICIENCY
SECURITY
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Capacity
❖ Wireless Transmission Is Through Radio-waves❖ Limited And Expensive
❖ Limitations Of Range❖ Less Data Density
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Efficiency
❖ 1.8 Million Cellular Radio Stations❖ Consume Massive Energy
❖ Most Energy Used For Cooling Base Stations❖ Base Station Have Only 5% Efficiency
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Availability
❖ Issues In Aerospace❖ Limited In Marine Applications
❖ Limitations In Petrochemical Plants❖ Environmental Problems of Radio-spectrum
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Security
❖ Penetrate Through Walls❖ Hackers Easily Hacks
❖ Can Be Intercepted
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Bandwidth Issues
1.8 Mil-lion+ 6 Billion+
Radio-spectrum is congested and the demand doubles every year, it shows that capacity is drying up
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Why Visible Light Communication Gamma Rays are dangerous
X-Rays has health issues Ultraviolet can be used only were humans aren't
present Infrared has heat radiation issues and using high
power causes health problems
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Light Fidelity (Li-Fi)
Future of wireless technologyWireless data transmission through illuminations
Visible Light for communicationIntensities modulates in a very higher rate
Very faster and GreenerChaos theory implemented Li-Fi are Extremely secure
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Basic Concepts of Li-FiFaster switching On and Off of LEDs in less than 1 micro-
secondHuman Eyes can't detect those variations
This invisible On-Off activities enables binary transmis-sion
Switching On = Logical '1'Switching Off = Logical '0'
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Li-Fi TransmitterFour Primary Assemblies
LED BulbRF Power Amplifier Circuit
Circuit BoardAluminium Enclosure
Ultra Parallel Data Streaming Is Used
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Ultra Parallel Transmission
• Using Arrays of Ultra Parallel LEDs for data transmission• Mixing Red, Green, Blue Lights To Alter The Frequencies
• So Each frequency encode different data
Promise Speed of 10Gbps
Seamlessly Streams 3D-4K Videos
UK Research Report
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O-OFDMOptical Orthogonal Frequency Division Multiplex-
ing
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…………………………………………….100010101010101010101010101010101011010101010101010101010000101010101010101010100010100010101110001000101100011001010100100010101111101010100101010101010101010000001111101010101010101010101010101001000101010011
…………………………………………….
Multiple Data Stream-ing
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Li-Fi ReceiverPhoto Detectors with Signal Amplifier and Processing Circuits
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Li-Fi Implementation
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Speed Comparison
Bluetooth Wi-Fi 802.11N
4G USB 3.0 Li-Fi0Gbps
2.5Gbps
5Gbps
7.5Gbps
10Gbps
12.5Gbps
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Applications of Li-Fi
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Li-Fi Smartphone
Prototype Demonstrated at Consumer Electronics Show, LA 2014
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Tele-MedicineMedical Technology has lagged behind the rest of the wireless world
Interferences from cell phones block sig-nals to the monitoring equipment
Helps faster Telemedicine
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AirlinesZero Percent Interference
Provides high-speed Internet
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Smarter Power PlantsRadio communications are bad for sensitive areasAnd Power-plants require faster communicationLi-Fi is safer, abundant, less power consumption
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Undersea Awesomeness
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Keep You Informed and Save Lives
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Communications in Rural Area
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Green Information Technology
Communication Safety
Multi User Communication
Lighting Point Hotspots
Traffic Information Directly To The Vehicles
Uses in Various Areas
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Recent Updates
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Recent Updates
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Leading Companies Behind Research
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pureLiFi Products
Li-1st LiFi Transmitter Li-Flame Receiver Ceiling Unit
Li-Flame Receiver Desktop Unit
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OLEDCOMM Products
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Advantages
Speed Greater Than 10GbpsSeamlessly streams 3D-4KHD videoCan be used almost everywhere, where RF signals are re-
strictedEnergy EfficientCost efficientExcellent alternative to Radio WavesHigh AvailabilityHigh Data DensityMore Secure
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Challenges facing
Cannot Penetrate Solid ObjectsDifficulties On Back Transmitting The Received LightInterference from external sourcesPresence of light for late night useLine of Sight Necessary in Most of the Cases
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Conclusion
Numerous Possibilities And Can Be Explored Further Every bulb can be used to a WiFi hotspot Greener-Cleaner-Safer Communication Currently Attracting a Great Deal of Interest Solves the Issues of Radio Waves, A an Alternative More Reliable And High Speed Larger Bandwidth A Lot Of Applications
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Reference[1] Prof. Harald Haas’s pureLiFi project website, www.purelifi.com[2] http://en.wikipedia.org/wiki/Li-Fi[3] http://teleinfobd.blogspot.in/2012/01/what-is-lifi.html[4] technopits.blogspot.comtechnology.cgap.org/2012/01/11/a-lifi-world/[5] www.lificonsortium.org/[6] the-gadgeteer.com/2011/08/29/li-fi-internet-at-thespeed-of-light/[7] en.wikipedia.org/wiki/Li-Fi[8] www.macmillandictionary.com/buzzword/entries/Li-Fi.html[9] dvice.com/archives/2012/08/lifi-ten-ways-i.php[10] Will Li-Fi be the new Wi-Fi?, Scientist Jamie Condliffe, 28 July 2011[11] ://www.digplanet.com/wiki/Li-Fi[12] ”Visible-light communication: Tripping the light fantastic: A fast and cheap optical version of Wi-Fi is coming”, Economist, dated 28Jan 2012
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THANK YOU