SlideShare una empresa de Scribd logo
1 de 21
Descargar para leer sin conexión
by
BRIJESH BHARTI
(CIT-06/16)
Under the supervision of
Dr. Gausia Qazi
Department of Electronics & Communication Engineering
National Institute of Technology,
Srinagar
(Visible Light Communication)
126/07/2017 National Institute of Technology, Srinagar
LiFi Technology
Outline
 Introduction
 How it’s Works
 The History of Li-Fi
 Implementation of Li-Fi.
 Comparison between Li-Fi / Wi-Fi
 Currently Research progress 2017
 Further research in the field can look into issue in LiFi
 Present Standardization activities in LiFi
 Features Advancement
 Application of Li-Fi
 Limitations of Li-Fi
 Conclusion
 References
202/05/2017 National Institute of Technology, Srinagar
Introduction
Li-Fi basically known as Light fidelity is an outcome of twenty first century
Li-Fi technology is a wireless communication system based on the use of
visible light between 400 to 800 THz .[1}
02/05/2017
National Institute of Technology, Srinagar
3
How it’s Works
Li-Fi is a Visible Light Communications (VLC) system
for data transmission
The working procedure is very simple,
if the light is on then transmit a digital “1”.if it’s off
transmit a ‘’0’’. [2]
The LEDs can be switched on and off very quickly
which gives nice opportunities for transmitting data.
02/05/2017
National Institute of Technology, Srinagar
4
02/05/2017
National Institute of Technology, Srinagar
5
The History of Li-Fi
 Alexander Graham Bell is most famous for inventing the telephone, but he also
demonstrated the first VLC system in 1880. [3]
02/05/2017
National Institute of Technology, Srinagar
6
The History of Li-Fi
in 2003,
a team at the Nakagawa Laboratory located at Keio University in Japan used LEDs to transmit
data via visible light [12]. This is the first account of transmitting digital information via LEDs.
In 2010,
Heinrich Hertz Institute in Berlin .were able to transmit at a speed of 500 Mbit/s over a distance of
5 meters and transfer at 100 Mbit/s over an even longer distance with 5 white LEDs.[13]
In 2011,
at TED Global, there was a demonstration of the D-light project, a VLC project led by Harald Haas,
a professor at the University of Edinburgh [14]. The demonstration showed a HD video being
transmitted from a standard LED lamp. The data rate of the VLC system was approximately 10
Mbps
702/05/2017
National Institute of Technology, Srinagar
 Li-Fi is typically implemented using white LED
light bulbs at the downlink transmitter. These
devices are normally used for illumination only by
applying a constant current
by fast variations of the current, the optical output
can be made to vary at extremely high speeds. This
very property of optical current is used in Li - Fi
setup
02/05/2017
National Institute of Technology, Srinagar
8
Implementation of Li-Fi.
02/05/2017
National Institute of Technology, Srinagar
9
Comparison between Li-Fi / Wi-Fi
Parameters Light Fidelity Wireless Fidelity
Speed for data transfer Faster transfer speed
(>1Gbps)
Data transfer speed (150Mbps)
Medium through which
data transfer occurs
Spectrum Range
Use Light as carrier
Visible light spectrum has
10,000 times broad
spectrum in comparison to
radio frequency
Use Radio spectrum
Radio frequency spectrum range is less than visible light
spectrum
Cost Cheaper than Wi-Fi
because free band doesn’t
need license and it uses
light
Expensive in comparison to Li-Fi because it uses radio spectrum
Network topology Point to point Point to point
Operating frequency Hundreds of Tera Hz 2.4GHz
10
02/05/2017
National Institute of Technology, Srinagar
11
 Currently, the University of Edinburgh UK is
immersed in researching Li-Fi to solve many of the
problems,[4]
 The university has achieved 10 Gbps speed and also
demonstrated that line of sight may not be a necessity
for Li-Fi transmission. Research is underway on
wireless system concepts based on Li-Fi. The
university website lists the following projects currently
in progress:[5]
Currently Research progress 2017
Currently Research progress 2017
 Optical Multiuser MIMO
 Interference Management in Cellular
 The Internet of Things
 Li-Fi Spatial Modulation
 Digital Modulation OFDM
 Self-Powered Li-Fi
02/05/2017
National Institute of Technology, Srinagar
12
Further research in the field can look into issue in LiFi
 Further research in the field can look into the following issues[6]
 1) Driving illumination grade LEDs at high speed
 2) Increasing data rate with parallelism/arrays
 3) Achieving low complexity/low cost modulation
 4) Overcoming the line of sight constraint
 5) Achieving seamless interoperability with other networks
 6) Making Li-Fi work in environments with little or no light
1302/05/2017
National Institute of Technology, Srinagar
Present Standardization activities in LiFi
 JEITA (Japan Electronics and Information Technology Industries Association)
accepted these standards as JEITA CP-1221 and JEITA CP-1222 [21]
 Standardization efforts for physical and media access layer are also done by
IEEE 802.15, Task Group 7
 In IEEE, 802.15 in IEEE 802 LMSC (LAN/MAN Standards Committee) has
organized the study group on VLC and the group is now the task group 7
(TG7) (TGVLC website). In South Korea, the telecommunications
technology association (TTA) (TTA website)
 In Europe, the working group 5 of the wireless world research forum
(WWRF) deals with VLC technology as one of next-generation wireless
access technology.
1402/05/2017
National Institute of Technology, Srinagar
Li-Fi offers a number of key benefits over Wi-Fi but is inherently a
complementary technology
Capacity
 Bandwidth:
The visible light spectrum is plentiful (10,000 more than RF spectrum),
unlicensed and free to use. [42]
 Data density:
Li-Fi can achieve about 1000 times the data density of Wi-Fi because
visible light can be well contained in a tight illumination area whereas RF
tends to spread out and cause interference. [43]
 High speed:
Very high data rates can be achieved due to low interference, high device
bandwidths and high intensity optical output
FPGA
1502/05/2017
National Institute of Technology, Srinagar
Features of Li Fi technology
Features of Li Fi technology
Efficiency
 Energy:
LED illumination is already efficient and the data transmission requires
negligible additional power.
 Environment:
RF transmission and propagation in water is extremely difficult but Li-
Fi works well in this environment. Safety:
There are no known safety or health concerns for this technology.
 Non-hazardous:
The transmission of light avoids the use of radio frequencies which can
dangerously interfere with electronic circuitry in certain environments.
Security
02/05/2017
National Institute of Technology, Srinagar
16
• Spectrum Relief:
• Mobile Connectivity:
• Hazardous Environments;
• Underwater Communications:
• traffic management:
• super fast internet
• Aircraft
• Helth and technology
• Application in sensitive areas
1702/05/2017
National Institute of Technology, Srinagar
Application of Li-Fi
Limitations of Li-Fi
 The main problem is that light can’t pass through objects,
so if the receiver is inadvertently blocked in any way, then
the signal will immediately cut out[7]
 Reliability and network coverage are the major issues to be
considered by the companies while providing VLC services.
 Interference from external light sources like sun light,
normal bulbs; and opaque materials in the path of
transmission will cause interruption in the communication
 We can’t have a light bulb that provides data to a high-
speed moving object or to provide data in a remote area
where there are trees and walls and obstacles behind[8]
02/05/2017
National Institute of Technology, Srinagar
18
Conclusion
“ 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”
02/05/2017
National Institute of Technology, Srinagar
19
References
[1] https://science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html
[2] www.techworld.com/data/what-is-li-fi-everything-you-need-know-3632764/
[3] [4] [5] https://www.engadget.com/2013/10/29/researchers-report-10gbps-data-
transmission-with-visible-led-lig/ /
http://www.techthefuture.com/technology/using-visible-light-frequencies-for-wireless-
data-transfer//
[6] http://www.ted.com/talks/harald_haas_wireless_data_from_every_light_bulb
[7] [8]
https://technozip.wordpress.com/technology/li-fi-technology/
LiFi study center , http://visiblelightcomm.com// lifi.eng.ed.ac.uk
2002/05/2017
National Institute of Technology, Srinagar
2102/05/2017 Indian Institute of Technology Kharagpur
Thank You

Más contenido relacionado

La actualidad más candente

LIFI TECHNOLOGY
LIFI TECHNOLOGYLIFI TECHNOLOGY
LIFI TECHNOLOGYVipin Jain
 
Lifi technology
Lifi technology Lifi technology
Lifi technology Shakib008
 
Lifi technology documentation
Lifi technology documentationLifi technology documentation
Lifi technology documentationSowjanya Jajaila
 
ppt on LIFI TECHNOLOGY
ppt on LIFI TECHNOLOGYppt on LIFI TECHNOLOGY
ppt on LIFI TECHNOLOGYtanshu singh
 
Li fi technology(awesome slides )
Li fi technology(awesome slides )Li fi technology(awesome slides )
Li fi technology(awesome slides )Manglesh Karn
 
Li fi(led transmission of data) presentation
Li fi(led transmission of data) presentationLi fi(led transmission of data) presentation
Li fi(led transmission of data) presentationKakashi57
 
Li-Fi – Light Fidelity (Animated)
Li-Fi – Light Fidelity (Animated)Li-Fi – Light Fidelity (Animated)
Li-Fi – Light Fidelity (Animated)Mohammed Khan
 
Seminar Report on Li-Fi Technology
Seminar Report on Li-Fi TechnologySeminar Report on Li-Fi Technology
Seminar Report on Li-Fi TechnologyUzmaRuhy
 
Li-Fi technology
Li-Fi technologyLi-Fi technology
Li-Fi technologyStudent
 
LI-FI TECHNOLOGY ( an emerging technology)
LI-FI TECHNOLOGY ( an emerging technology) LI-FI TECHNOLOGY ( an emerging technology)
LI-FI TECHNOLOGY ( an emerging technology) Anil Kumar
 
Lifi technology ppt
Lifi technology pptLifi technology ppt
Lifi technology pptsatya0506
 
Lifi technology(nimesh bariya)
Lifi technology(nimesh bariya)Lifi technology(nimesh bariya)
Lifi technology(nimesh bariya)Nimesh Bariya
 
light Fidelity by Harikiran Shetty Manipal University
light Fidelity by Harikiran Shetty Manipal Universitylight Fidelity by Harikiran Shetty Manipal University
light Fidelity by Harikiran Shetty Manipal UniversityHarikiran Shetty
 

La actualidad más candente (20)

Li-Fi Technology presentation
Li-Fi Technology presentationLi-Fi Technology presentation
Li-Fi Technology presentation
 
LIFI technolgy
LIFI technolgyLIFI technolgy
LIFI technolgy
 
LIFI TECHNOLOGY
LIFI TECHNOLOGYLIFI TECHNOLOGY
LIFI TECHNOLOGY
 
Lifi technology
Lifi technology Lifi technology
Lifi technology
 
Lifi ppt
Lifi pptLifi ppt
Lifi ppt
 
Lifi ppt
Lifi pptLifi ppt
Lifi ppt
 
Lifi technology documentation
Lifi technology documentationLifi technology documentation
Lifi technology documentation
 
ppt on LIFI TECHNOLOGY
ppt on LIFI TECHNOLOGYppt on LIFI TECHNOLOGY
ppt on LIFI TECHNOLOGY
 
Li-Fi Technology
Li-Fi TechnologyLi-Fi Technology
Li-Fi Technology
 
Li fi technology(awesome slides )
Li fi technology(awesome slides )Li fi technology(awesome slides )
Li fi technology(awesome slides )
 
Li fi ppt
Li fi pptLi fi ppt
Li fi ppt
 
Li fi(led transmission of data) presentation
Li fi(led transmission of data) presentationLi fi(led transmission of data) presentation
Li fi(led transmission of data) presentation
 
Li-Fi – Light Fidelity (Animated)
Li-Fi – Light Fidelity (Animated)Li-Fi – Light Fidelity (Animated)
Li-Fi – Light Fidelity (Animated)
 
Li-Fi Technology
Li-Fi TechnologyLi-Fi Technology
Li-Fi Technology
 
Seminar Report on Li-Fi Technology
Seminar Report on Li-Fi TechnologySeminar Report on Li-Fi Technology
Seminar Report on Li-Fi Technology
 
Li-Fi technology
Li-Fi technologyLi-Fi technology
Li-Fi technology
 
LI-FI TECHNOLOGY ( an emerging technology)
LI-FI TECHNOLOGY ( an emerging technology) LI-FI TECHNOLOGY ( an emerging technology)
LI-FI TECHNOLOGY ( an emerging technology)
 
Lifi technology ppt
Lifi technology pptLifi technology ppt
Lifi technology ppt
 
Lifi technology(nimesh bariya)
Lifi technology(nimesh bariya)Lifi technology(nimesh bariya)
Lifi technology(nimesh bariya)
 
light Fidelity by Harikiran Shetty Manipal University
light Fidelity by Harikiran Shetty Manipal Universitylight Fidelity by Harikiran Shetty Manipal University
light Fidelity by Harikiran Shetty Manipal University
 

Similar a LiFi technology (visible light communication )

Li-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdf
Li-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdfLi-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdf
Li-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdfHieu Le Dinh
 
DATA TRANSMISSION THROUGH ILLUMINATION
DATA TRANSMISSION THROUGH ILLUMINATIONDATA TRANSMISSION THROUGH ILLUMINATION
DATA TRANSMISSION THROUGH ILLUMINATIONPravin Ahirwar
 
applsci-11-11118.pdf
applsci-11-11118.pdfapplsci-11-11118.pdf
applsci-11-11118.pdfNagendraA7
 
applsci-11-11118.pdf
applsci-11-11118.pdfapplsci-11-11118.pdf
applsci-11-11118.pdfNagendraA7
 
Seminar Report On Implementation Of Li-FI Technology
Seminar Report On Implementation Of Li-FI TechnologySeminar Report On Implementation Of Li-FI Technology
Seminar Report On Implementation Of Li-FI TechnologyAnjeet Kumar
 
Li fi (light fidelity) – the changing scenario of wireless communication
Li fi (light fidelity) – the changing scenario of wireless communicationLi fi (light fidelity) – the changing scenario of wireless communication
Li fi (light fidelity) – the changing scenario of wireless communicationeSAT Journals
 
High speed data_transmission_of_images_o
High speed data_transmission_of_images_oHigh speed data_transmission_of_images_o
High speed data_transmission_of_images_oLuisa Francisco
 
The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...
The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...
The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...AM Publications
 
Light Fidelity ( Li-Fi ) Seminar Report
Light Fidelity ( Li-Fi ) Seminar ReportLight Fidelity ( Li-Fi ) Seminar Report
Light Fidelity ( Li-Fi ) Seminar ReportShamil Niju
 
lifi presentation
lifi presentationlifi presentation
lifi presentationHappy Soni
 
Lifi Seminar Report Full
Lifi Seminar Report FullLifi Seminar Report Full
Lifi Seminar Report FullArpit Gupta
 
study paper on Li-Fi technology
study paper on Li-Fi technologystudy paper on Li-Fi technology
study paper on Li-Fi technologyShowrav Mazumder
 
Li-Fi (Light Fidelity)-The future technology In Wireless communication
Li-Fi (Light Fidelity)-The future technology In Wireless communicationLi-Fi (Light Fidelity)-The future technology In Wireless communication
Li-Fi (Light Fidelity)-The future technology In Wireless communicationAbdul Moiz Dota
 

Similar a LiFi technology (visible light communication ) (20)

Li-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdf
Li-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdfLi-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdf
Li-Fi_Technology_for_Vehicle-to-Vehicle_Communication.pdf
 
DATA TRANSMISSION THROUGH ILLUMINATION
DATA TRANSMISSION THROUGH ILLUMINATIONDATA TRANSMISSION THROUGH ILLUMINATION
DATA TRANSMISSION THROUGH ILLUMINATION
 
applsci-11-11118.pdf
applsci-11-11118.pdfapplsci-11-11118.pdf
applsci-11-11118.pdf
 
applsci-11-11118.pdf
applsci-11-11118.pdfapplsci-11-11118.pdf
applsci-11-11118.pdf
 
Seminar Report On Implementation Of Li-FI Technology
Seminar Report On Implementation Of Li-FI TechnologySeminar Report On Implementation Of Li-FI Technology
Seminar Report On Implementation Of Li-FI Technology
 
Li fi (light fidelity) – the changing scenario of wireless communication
Li fi (light fidelity) – the changing scenario of wireless communicationLi fi (light fidelity) – the changing scenario of wireless communication
Li fi (light fidelity) – the changing scenario of wireless communication
 
High speed data_transmission_of_images_o
High speed data_transmission_of_images_oHigh speed data_transmission_of_images_o
High speed data_transmission_of_images_o
 
LIFI
LIFILIFI
LIFI
 
The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...
The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...
The Assessments and Challenges of LED Generated Data Traffic using Li-Fi Tech...
 
Light Fidelity ( Li-Fi ) Seminar Report
Light Fidelity ( Li-Fi ) Seminar ReportLight Fidelity ( Li-Fi ) Seminar Report
Light Fidelity ( Li-Fi ) Seminar Report
 
LiFi technology
 LiFi technology  LiFi technology
LiFi technology
 
lifi technology
lifi technologylifi technology
lifi technology
 
Seminar Report
Seminar ReportSeminar Report
Seminar Report
 
lifi presentation
lifi presentationlifi presentation
lifi presentation
 
Seminar report
Seminar reportSeminar report
Seminar report
 
Li fi Light Fiedility
Li fi Light FiedilityLi fi Light Fiedility
Li fi Light Fiedility
 
Lifi Seminar Report Full
Lifi Seminar Report FullLifi Seminar Report Full
Lifi Seminar Report Full
 
study paper on Li-Fi technology
study paper on Li-Fi technologystudy paper on Li-Fi technology
study paper on Li-Fi technology
 
Li-Fi (Light Fidelity)-The future technology In Wireless communication
Li-Fi (Light Fidelity)-The future technology In Wireless communicationLi-Fi (Light Fidelity)-The future technology In Wireless communication
Li-Fi (Light Fidelity)-The future technology In Wireless communication
 
Li fi Report
Li fi ReportLi fi Report
Li fi Report
 

Último

Phase noise transfer functions.pptx
Phase noise transfer      functions.pptxPhase noise transfer      functions.pptx
Phase noise transfer functions.pptxSaiGouthamSunkara
 
CSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptxCSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptxssusera0771e
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Projectreemakb03
 
Oracle_PLSQL_basic_tutorial_with_workon_Exercises.ppt
Oracle_PLSQL_basic_tutorial_with_workon_Exercises.pptOracle_PLSQL_basic_tutorial_with_workon_Exercises.ppt
Oracle_PLSQL_basic_tutorial_with_workon_Exercises.pptDheerajKashnyal
 
Modelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovationsModelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovationsYusuf Yıldız
 
Technical Management of cement industry.pdf
Technical Management of cement industry.pdfTechnical Management of cement industry.pdf
Technical Management of cement industry.pdfMadan Karki
 
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...amrabdallah9
 
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxVertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxLMW Machine Tool Division
 
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfSummer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfNaveenVerma126
 
ChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai searchChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai searchrohitcse52
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Apollo Techno Industries Pvt Ltd
 
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...Amil baba
 
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfRenewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfodunowoeminence2019
 
The relationship between iot and communication technology
The relationship between iot and communication technologyThe relationship between iot and communication technology
The relationship between iot and communication technologyabdulkadirmukarram03
 
cme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answerscme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answerskarthi keyan
 
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...Sean Meyn
 
IT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptxIT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptxSAJITHABANUS
 
Guardians and Glitches: Navigating the Duality of Gen AI in AppSec
Guardians and Glitches: Navigating the Duality of Gen AI in AppSecGuardians and Glitches: Navigating the Duality of Gen AI in AppSec
Guardians and Glitches: Navigating the Duality of Gen AI in AppSecTrupti Shiralkar, CISSP
 

Último (20)

Phase noise transfer functions.pptx
Phase noise transfer      functions.pptxPhase noise transfer      functions.pptx
Phase noise transfer functions.pptx
 
CSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptxCSR Managerial Round Questions and answers.pptx
CSR Managerial Round Questions and answers.pptx
 
Gender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 ProjectGender Bias in Engineer, Honors 203 Project
Gender Bias in Engineer, Honors 203 Project
 
Oracle_PLSQL_basic_tutorial_with_workon_Exercises.ppt
Oracle_PLSQL_basic_tutorial_with_workon_Exercises.pptOracle_PLSQL_basic_tutorial_with_workon_Exercises.ppt
Oracle_PLSQL_basic_tutorial_with_workon_Exercises.ppt
 
Modelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovationsModelling Guide for Timber Structures - FPInnovations
Modelling Guide for Timber Structures - FPInnovations
 
Technical Management of cement industry.pdf
Technical Management of cement industry.pdfTechnical Management of cement industry.pdf
Technical Management of cement industry.pdf
 
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
Strategies of Urban Morphologyfor Improving Outdoor Thermal Comfort and Susta...
 
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptxVertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
Vertical- Machining - Center - VMC -LMW-Machine-Tool-Division.pptx
 
Présentation IIRB 2024 Marine Cordonnier.pdf
Présentation IIRB 2024 Marine Cordonnier.pdfPrésentation IIRB 2024 Marine Cordonnier.pdf
Présentation IIRB 2024 Marine Cordonnier.pdf
 
Litature Review: Research Paper work for Engineering
Litature Review: Research Paper work for EngineeringLitature Review: Research Paper work for Engineering
Litature Review: Research Paper work for Engineering
 
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdfSummer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
Summer training report on BUILDING CONSTRUCTION for DIPLOMA Students.pdf
 
ChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai searchChatGPT-and-Generative-AI-Landscape Working of generative ai search
ChatGPT-and-Generative-AI-Landscape Working of generative ai search
 
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...Technology Features of Apollo HDD Machine, Its Technical Specification with C...
Technology Features of Apollo HDD Machine, Its Technical Specification with C...
 
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
Popular-NO1 Kala Jadu Expert Specialist In Germany Kala Jadu Expert Specialis...
 
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdfRenewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
Renewable Energy & Entrepreneurship Workshop_21Feb2024.pdf
 
The relationship between iot and communication technology
The relationship between iot and communication technologyThe relationship between iot and communication technology
The relationship between iot and communication technology
 
cme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answerscme397 surface engineering unit 5 part A questions and answers
cme397 surface engineering unit 5 part A questions and answers
 
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
Quasi-Stochastic Approximation: Algorithm Design Principles with Applications...
 
IT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptxIT3401-WEB ESSENTIALS PRESENTATIONS.pptx
IT3401-WEB ESSENTIALS PRESENTATIONS.pptx
 
Guardians and Glitches: Navigating the Duality of Gen AI in AppSec
Guardians and Glitches: Navigating the Duality of Gen AI in AppSecGuardians and Glitches: Navigating the Duality of Gen AI in AppSec
Guardians and Glitches: Navigating the Duality of Gen AI in AppSec
 

LiFi technology (visible light communication )

  • 1. by BRIJESH BHARTI (CIT-06/16) Under the supervision of Dr. Gausia Qazi Department of Electronics & Communication Engineering National Institute of Technology, Srinagar (Visible Light Communication) 126/07/2017 National Institute of Technology, Srinagar LiFi Technology
  • 2. Outline  Introduction  How it’s Works  The History of Li-Fi  Implementation of Li-Fi.  Comparison between Li-Fi / Wi-Fi  Currently Research progress 2017  Further research in the field can look into issue in LiFi  Present Standardization activities in LiFi  Features Advancement  Application of Li-Fi  Limitations of Li-Fi  Conclusion  References 202/05/2017 National Institute of Technology, Srinagar
  • 3. Introduction Li-Fi basically known as Light fidelity is an outcome of twenty first century Li-Fi technology is a wireless communication system based on the use of visible light between 400 to 800 THz .[1} 02/05/2017 National Institute of Technology, Srinagar 3
  • 4. How it’s Works Li-Fi is a Visible Light Communications (VLC) system for data transmission The working procedure is very simple, if the light is on then transmit a digital “1”.if it’s off transmit a ‘’0’’. [2] The LEDs can be switched on and off very quickly which gives nice opportunities for transmitting data. 02/05/2017 National Institute of Technology, Srinagar 4
  • 5. 02/05/2017 National Institute of Technology, Srinagar 5
  • 6. The History of Li-Fi  Alexander Graham Bell is most famous for inventing the telephone, but he also demonstrated the first VLC system in 1880. [3] 02/05/2017 National Institute of Technology, Srinagar 6
  • 7. The History of Li-Fi in 2003, a team at the Nakagawa Laboratory located at Keio University in Japan used LEDs to transmit data via visible light [12]. This is the first account of transmitting digital information via LEDs. In 2010, Heinrich Hertz Institute in Berlin .were able to transmit at a speed of 500 Mbit/s over a distance of 5 meters and transfer at 100 Mbit/s over an even longer distance with 5 white LEDs.[13] In 2011, at TED Global, there was a demonstration of the D-light project, a VLC project led by Harald Haas, a professor at the University of Edinburgh [14]. The demonstration showed a HD video being transmitted from a standard LED lamp. The data rate of the VLC system was approximately 10 Mbps 702/05/2017 National Institute of Technology, Srinagar
  • 8.  Li-Fi is typically implemented using white LED light bulbs at the downlink transmitter. These devices are normally used for illumination only by applying a constant current by fast variations of the current, the optical output can be made to vary at extremely high speeds. This very property of optical current is used in Li - Fi setup 02/05/2017 National Institute of Technology, Srinagar 8 Implementation of Li-Fi.
  • 9. 02/05/2017 National Institute of Technology, Srinagar 9
  • 10. Comparison between Li-Fi / Wi-Fi Parameters Light Fidelity Wireless Fidelity Speed for data transfer Faster transfer speed (>1Gbps) Data transfer speed (150Mbps) Medium through which data transfer occurs Spectrum Range Use Light as carrier Visible light spectrum has 10,000 times broad spectrum in comparison to radio frequency Use Radio spectrum Radio frequency spectrum range is less than visible light spectrum Cost Cheaper than Wi-Fi because free band doesn’t need license and it uses light Expensive in comparison to Li-Fi because it uses radio spectrum Network topology Point to point Point to point Operating frequency Hundreds of Tera Hz 2.4GHz 10
  • 11. 02/05/2017 National Institute of Technology, Srinagar 11  Currently, the University of Edinburgh UK is immersed in researching Li-Fi to solve many of the problems,[4]  The university has achieved 10 Gbps speed and also demonstrated that line of sight may not be a necessity for Li-Fi transmission. Research is underway on wireless system concepts based on Li-Fi. The university website lists the following projects currently in progress:[5] Currently Research progress 2017
  • 12. Currently Research progress 2017  Optical Multiuser MIMO  Interference Management in Cellular  The Internet of Things  Li-Fi Spatial Modulation  Digital Modulation OFDM  Self-Powered Li-Fi 02/05/2017 National Institute of Technology, Srinagar 12
  • 13. Further research in the field can look into issue in LiFi  Further research in the field can look into the following issues[6]  1) Driving illumination grade LEDs at high speed  2) Increasing data rate with parallelism/arrays  3) Achieving low complexity/low cost modulation  4) Overcoming the line of sight constraint  5) Achieving seamless interoperability with other networks  6) Making Li-Fi work in environments with little or no light 1302/05/2017 National Institute of Technology, Srinagar
  • 14. Present Standardization activities in LiFi  JEITA (Japan Electronics and Information Technology Industries Association) accepted these standards as JEITA CP-1221 and JEITA CP-1222 [21]  Standardization efforts for physical and media access layer are also done by IEEE 802.15, Task Group 7  In IEEE, 802.15 in IEEE 802 LMSC (LAN/MAN Standards Committee) has organized the study group on VLC and the group is now the task group 7 (TG7) (TGVLC website). In South Korea, the telecommunications technology association (TTA) (TTA website)  In Europe, the working group 5 of the wireless world research forum (WWRF) deals with VLC technology as one of next-generation wireless access technology. 1402/05/2017 National Institute of Technology, Srinagar
  • 15. Li-Fi offers a number of key benefits over Wi-Fi but is inherently a complementary technology Capacity  Bandwidth: The visible light spectrum is plentiful (10,000 more than RF spectrum), unlicensed and free to use. [42]  Data density: Li-Fi can achieve about 1000 times the data density of Wi-Fi because visible light can be well contained in a tight illumination area whereas RF tends to spread out and cause interference. [43]  High speed: Very high data rates can be achieved due to low interference, high device bandwidths and high intensity optical output FPGA 1502/05/2017 National Institute of Technology, Srinagar Features of Li Fi technology
  • 16. Features of Li Fi technology Efficiency  Energy: LED illumination is already efficient and the data transmission requires negligible additional power.  Environment: RF transmission and propagation in water is extremely difficult but Li- Fi works well in this environment. Safety: There are no known safety or health concerns for this technology.  Non-hazardous: The transmission of light avoids the use of radio frequencies which can dangerously interfere with electronic circuitry in certain environments. Security 02/05/2017 National Institute of Technology, Srinagar 16
  • 17. • Spectrum Relief: • Mobile Connectivity: • Hazardous Environments; • Underwater Communications: • traffic management: • super fast internet • Aircraft • Helth and technology • Application in sensitive areas 1702/05/2017 National Institute of Technology, Srinagar Application of Li-Fi
  • 18. Limitations of Li-Fi  The main problem is that light can’t pass through objects, so if the receiver is inadvertently blocked in any way, then the signal will immediately cut out[7]  Reliability and network coverage are the major issues to be considered by the companies while providing VLC services.  Interference from external light sources like sun light, normal bulbs; and opaque materials in the path of transmission will cause interruption in the communication  We can’t have a light bulb that provides data to a high- speed moving object or to provide data in a remote area where there are trees and walls and obstacles behind[8] 02/05/2017 National Institute of Technology, Srinagar 18
  • 19. Conclusion “ 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” 02/05/2017 National Institute of Technology, Srinagar 19
  • 20. References [1] https://science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html [2] www.techworld.com/data/what-is-li-fi-everything-you-need-know-3632764/ [3] [4] [5] https://www.engadget.com/2013/10/29/researchers-report-10gbps-data- transmission-with-visible-led-lig/ / http://www.techthefuture.com/technology/using-visible-light-frequencies-for-wireless- data-transfer// [6] http://www.ted.com/talks/harald_haas_wireless_data_from_every_light_bulb [7] [8] https://technozip.wordpress.com/technology/li-fi-technology/ LiFi study center , http://visiblelightcomm.com// lifi.eng.ed.ac.uk 2002/05/2017 National Institute of Technology, Srinagar
  • 21. 2102/05/2017 Indian Institute of Technology Kharagpur Thank You