Li-Fi is the term some have used to label the fast and cheap wireless-communication system, which is the optical version of Wi-Fi. The term was first used in this context by Harald Haas in his TED Global talk on Visible Light Communication(VLC). The technology was demonstrated at the 2012 Consumer Electronics Show in Las Vegas using a pair of Casio smartphones to exchange data using light of varying intensity given off from their screens, detectable at a distance of up to ten meters. For more recent trends in electronics please visit radeshyamece.blogspot.com
Li-Fi is the term some have used to label the fast and cheap wireless-communication system, which is the optical version of Wi-Fi. The term was first used in this context by Harald Haas in his TED Global talk on Visible Light Communication(VLC). The technology was demonstrated at the 2012 Consumer Electronics Show in Las Vegas using a pair of Casio smartphones to exchange data using light of varying intensity given off from their screens, detectable at a distance of up to ten meters. For more recent trends in electronics please visit radeshyamece.blogspot.com
This is the latest technolgy which encourages viewers. Also this technolgy is vast because researchers are still researching about this technolgy so that this technolgy can be used practically all over the world.
Li-Fi is a new wireless technology which provides the connectivity within localized network environment. The main principle of this technology is we can transmit the data using light illumination by using light emitting diodes where radio frequency is media in Wi-Fi and LED bulb light intensity is faster than human eye can follow. One germen phycist-Prof Harald Haas an expert in optical wireless communications at the University of Edinburgh, he demonstrated how an LED bulb equipped with signal processing technology could stream a high-definition video to a computer. By using this technology a 1 watt LED light bulb would be enough to provide net connectivity to four computers. This technology termed as "light fidelity". This technology allows us to transfer data more securely with higher data rates. This technology is still under research and further exploitation could lead to wide applications.
With the vast growing gadgets, their usage and their developments led to the advancement in the Wi-Fi which provides a technology so called Li-Fi.Li-Fi is a technology that makes use of LED light which helps in the transmission of data much more faster and flexible than data that can be transmitted through Wi-Fi.Light reaches nearly everywhere so communication can also go along with light freely. Light Fidelity is a branch of optical wireless communication which is an emerging technology. By using visible light as transmission medium, Li-Fi provides wireless indoor communication. The bit rate achieved by Li-Fi cannot be achieved by Wi-Fi.. Dr herald Haas ,the professor of mobile communications at the university of Edinburgh school of engineering ,first time publically displayed the proof of Light Fidelity(Li-Fi) ,a method of Visible Light communication(VLC). Li-Fi is the transfer of data through light by taking fiber out of fiber optics and sending data through LED light.
This is the latest technolgy which encourages viewers. Also this technolgy is vast because researchers are still researching about this technolgy so that this technolgy can be used practically all over the world.
Li-Fi is a new wireless technology which provides the connectivity within localized network environment. The main principle of this technology is we can transmit the data using light illumination by using light emitting diodes where radio frequency is media in Wi-Fi and LED bulb light intensity is faster than human eye can follow. One germen phycist-Prof Harald Haas an expert in optical wireless communications at the University of Edinburgh, he demonstrated how an LED bulb equipped with signal processing technology could stream a high-definition video to a computer. By using this technology a 1 watt LED light bulb would be enough to provide net connectivity to four computers. This technology termed as "light fidelity". This technology allows us to transfer data more securely with higher data rates. This technology is still under research and further exploitation could lead to wide applications.
With the vast growing gadgets, their usage and their developments led to the advancement in the Wi-Fi which provides a technology so called Li-Fi.Li-Fi is a technology that makes use of LED light which helps in the transmission of data much more faster and flexible than data that can be transmitted through Wi-Fi.Light reaches nearly everywhere so communication can also go along with light freely. Light Fidelity is a branch of optical wireless communication which is an emerging technology. By using visible light as transmission medium, Li-Fi provides wireless indoor communication. The bit rate achieved by Li-Fi cannot be achieved by Wi-Fi.. Dr herald Haas ,the professor of mobile communications at the university of Edinburgh school of engineering ,first time publically displayed the proof of Light Fidelity(Li-Fi) ,a method of Visible Light communication(VLC). Li-Fi is the transfer of data through light by taking fiber out of fiber optics and sending data through LED light.
In simple terms, Li-Fi can be thought of as a light-based Wi-Fi. That is, it uses light instead of radio waves to transmit information. And instead of Wi-Fi modems, Li-Fi would use transceiver-fitted LED lamps that can light a room as well as transmit and receive information. Since simple light bulbs are used, there can technically be any number of access points.
This technology uses a part of the electromagnetic spectrum that is still not greatly utilized- The Visible Spectrum. Light is in fact very much part of our lives for millions and millions of years and does not have any major ill effect. Moreover there is 10,000 times more space available in this spectrum and just counting on the bulbs in use, it also multiplies to 10,000 times more availability as an infrastructure, globally.
You can get the basic theme of an emerging communication technology named "LiFi" which will overcome the drawbacks of WiFi by a good margin!
(For watching the GIF's use Slideshow)
Global li fi (light fidelity)technology industry 2015 market research reportcharudattrmoz
This report on the Global LiFi (Light Fidelity)Technology Market is an amalgamation of both primary as well as secondary research and is collated by conducting various surveys and interviews. It is a meticulous guide that covers the global LiFi (Light Fidelity)Technology market’s future growth prospects and also presents an extensive overview of the current state of the market. Market dynamics such as the market drivers, trends, challenges, and opportunities have been covered along with their impact on the growth of the LiFi (Light Fidelity)Technology market.
Wi-Fi (Wireless Fidelity) is a generic term owned by "WiFi Alliance" which refers to any Wireless Local Area Networks (WLANs) based on IEEE 802.11 standard.
This presentation is prepared as reference of "E-Commerce Infrastructure" for BBA 6th Semester Students of Prime College. Document includes general introduction of WiFi Technology, WiFi Specification, advantages of WiFi and so on. Resources from various portals and slides from other authors has been used as reference.
All you need to know about regression testing | David TzemachDavid Tzemach
All you need to know about Regression testing| David Tzemach
1. Overview
2. What is “Regression” testing…?
3. When should you use it..?
4. How to implement..?
5. Test Recommendations
6. Considerations when building Regression tests
Li-Fi, or light fidelity, is 5G visible light communication systems using light from light-emitting diodes (LEDs) as a medium to deliver networked, mobile, high-speed communication in a similar manner as Wi-Fi and Optical fiber.
Li-Fi stand for ―light fidelity‖, it is a wireless optical networking technology that uses light emitting diodes (LEDs) for data transmission. Li-Fi is different from Wi-Fi that transmits data by using the spectrum of visible light.
Li fi (light fidelity) – the changing scenario of wireless communicationeSAT Journals
Abstract
Sustainability has been a major parameter in evaluation of construction industry. Sustainable construction can be defined simply as the application of methods which fulfill the needs of the present generation without compromising the needs of the future generation [1]. One of such methods used is LCA. Life Cycle Assessment of a construction material is done to get a broader picture of the environmental impact of the particular material in terms of carbon footprint. LCA Methods helps in pointing out the specific process of the material procurement or usage during which cynically affects the environment. The analysis of the results may help in informing the consumer or producer to reduce the life cycle greenhouse gas emissions. In this paper, EIO-LCA software is discussed and alternative construction materials are analyzed against conventional materials thereby, suggesting the better one between them. Necessary incentives to enhance the use of LCA were also discussed.
Keywords – Sustainability, Life Cycle Assessment, carbon footprint, EIO-LCA
Li fi(light fidelity)-the future technology in wirelessakshay_panchal
Li-Fi is a new wireless technology to provide
the connectivity with in localized network environment.
The main principle of this technology is we can transmit
the data using light illumination by using light-emitting
diodes where radio frequency is media in Wi-Fi and
LED bulb light intensity is faster than human eye can
follow. Prof Harald Haas an expert in optical wireless
communications at the University of Edinburgh, he was
demonstrated how an LED bulb equipped with signal
processing technology could stream a high-definition
video to a computer. By using this technology a one-watt
LED light bulb would be enough to provide net
connectivity to four computers. He coined the term
"light fidelity" or li-fi and set up a private company,
Pure VLC, to exploit the technology. . He envisions a
future where data for laptops, smart phones, and tablets
is transmitted through the light in a room. And security
would be snap – if you can’t see the light, you can’t
access the data.
Design, Working, Challenges, Applications, Advantages and Disadvantages of Li...ijtsrd
This article demonstrates the definition of Li Fi Light Fidelity , its different applications, Advantages, Disadvantages as well as Challenges which would be great for an upcoming generation under wireless technology. The research is based on the various factors, consequences and risk factors associated with the advent of this field. This also demonstrates the communication of worldwide speaks with VLC. Li Fi could be a wireless networking technology thats wont to transmitting data from one device to a different device. This research paper covers the applications of Li Fi and compare with existing technology like Wi Fi. Nisha Shelke | Dr. Anandhi Giri ""Design, Working, Challenges, Applications, Advantages and Disadvantages of Li-Fi in Wireless Networks"" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-2 , February 2020,
URL: https://www.ijtsrd.com/papers/ijtsrd30249.pdf
Paper Url : https://www.ijtsrd.com/computer-science/computer-network/30249/design-working-challenges-applications-advantages-and-disadvantages-of-li-fi-in-wireless-networks/nisha-shelke
LI-FI is transmission of data through illumination ,i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow
1.Wireless Communication System_Wireless communication is a broad term that i...JeyaPerumal1
Wireless communication involves the transmission of information over a distance without the help of wires, cables or any other forms of electrical conductors.
Wireless communication is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal through wireless communication technologies and devices.
Features of Wireless Communication
The evolution of wireless technology has brought many advancements with its effective features.
The transmitted distance can be anywhere between a few meters (for example, a television's remote control) and thousands of kilometers (for example, radio communication).
Wireless communication can be used for cellular telephony, wireless access to the internet, wireless home networking, and so on.
ER(Entity Relationship) Diagram for online shopping - TAEHimani415946
https://bit.ly/3KACoyV
The ER diagram for the project is the foundation for the building of the database of the project. The properties, datatypes, and attributes are defined by the ER diagram.
Multi-cluster Kubernetes Networking- Patterns, Projects and GuidelinesSanjeev Rampal
Talk presented at Kubernetes Community Day, New York, May 2024.
Technical summary of Multi-Cluster Kubernetes Networking architectures with focus on 4 key topics.
1) Key patterns for Multi-cluster architectures
2) Architectural comparison of several OSS/ CNCF projects to address these patterns
3) Evolution trends for the APIs of these projects
4) Some design recommendations & guidelines for adopting/ deploying these solutions.
This 7-second Brain Wave Ritual Attracts Money To You.!nirahealhty
Discover the power of a simple 7-second brain wave ritual that can attract wealth and abundance into your life. By tapping into specific brain frequencies, this technique helps you manifest financial success effortlessly. Ready to transform your financial future? Try this powerful ritual and start attracting money today!
2. Introduction
What is WiFi ?
What is LiFi ?
Comparison
Primary challenges of present wireless
communication.
Why LiFi and WiFi together ?
Challenges on incorporating LiFi and WiFi
Linking UDs to network
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3. Supporting UDs mobility
LiFi Transceivers
Performance of indoor and outdoor links
Comparison of three systems
Applications
Future Scope
Conclusion
Reference
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4. Increasing demand of network.
Increasing Wireless HetNets.
Independent existence of VLC and WiFi.
What if they coexist?????
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5. WiFi is a technology that allows electronic
devices to connect to a wireless LAN.
WiFi is less secure than wired connections.
Its demerits include Interference, limited
range and high power consumption
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6. Li-Fi is a Visible Light Communications
system running wireless communications
travelling at very high speeds.
LED bulb that varies its intensity faster than a
human eye can follow.
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7. WiFi LiFi
Speed is about
54Mb/s.
Use radio waves as
carrier.
Less secure.
LOS is not required.
Speed is greater than
1Gb/s.
Use visible light
communication.
Highly secure.
LOS is highly required.
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10. 80% mobile users are indoor users
LiFi enabled indoor lights modeled as optical-SCs.
Today LiFi enables ONLY downlink. Uplink is still a challenge .
Provides High-speed traffic offloading and security enhancement.
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12. How user devices are attached to the n/w?
How mobility of the device is supported?
How multiple users are accommodated?
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13. More than one luminaire at a sight.
CSI : Channel State Information
It is advantage whenever high through-put is
required.
Three possible scenarios:
1. Single user provided with single luminaire.
2. Single user provided with multiple luminaires.
3. Multiple users provided with multiple luminaires.
College Of Engineering Chengannur 13
14. Maintaining connectivity for the mobile users
is the primary challenge.
Handover mechanism the traffic from a UD is
rerouted from O-SCs to RF-SCs and vice
versa.
Other mechanism: OFDMA
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15. In todays world there are LiFi receivers but
not transmitters.
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17. Si PIN photodiode to provide high speed.
Plano-convex 1”lens are used to concentrate
the beam and enlarge the receiving area.
BBU is used to convert Ethernet packets into
DC-biased OFDM signals.
Channel quality and illumination level are the
factors that affects the data rate.
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20. 1. Only WiFi is used to connect to internet.
2. Hybrid system – WiFi is used to connect the
downlink and uplink along with LiFi as
downlink.
3. Aggregate system – user is connected via
both LiFi and WiFi system.
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24. Health sector: Since WiFi alone is not safe to
be used in hospitals.
Internet anywhere: street lamps, light of
vehicles can be used to access internet
anywhere in footpaths, roads, malls,
anywhere where light source is available.
IoT : Internet of things.
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25. Further evolution of LiFi and WiFi to higher
data rates.
Coexistence and further evolution of
CSMA/CA and OFDMA.
Physical layer techniques to enhance the user
mobility.
Improvement and development of the
existing optical front ends.
College Of Engineering Chengannur 25
26. Coexistence between LiFi and WiFi is a new
promising research area.
Improved techniques to enable high speed
offloading.
Both technologies together gives triple
throughput for individual users.
There is a great deal of research opportunity for
LiFi+WiFi network.
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27. College Of Engineering Chengannur 27
[1] Moussa Ayyash, Hany Elgala, Abdallah Khreishah,
“Coexistence of WiFi and LiFi Toward 5G:
Concepts, Opportunities, and Challenges”, IEEE
Communications Magazine, Year: 2016, Volume:
54, Issue: 2,Pages: 64 - 71
[2] Harald Haas; Liang Yin; Yunlu Wang; Cheng Chen, “What
is LiFi? ”Journal of Light wave Technology, Year:
2016, Volume: 34, Issue: 6,Pages: 1533 - 1544
