Applications of li fi can extend in areas where the wi fi technology lacks its presence like medical technology, power plants and various other areas. Lifi provides transmission of data through illumination by sending data. The technology is very new and was proposed by the german physicist harald haas in 2011. Li fi light fidelity technology exploits the capabilities of an led light emitting diode to serve the purpose of data transmission with greater reliability, security and accuracy. Visible light part of the electromagnetic spectrum. Standards used by li fi like wi fi, li fi is wireless but uses vlc which has much wider bandwidth instead of radio waves used by wi fi. Mar 04, 2018 ever thought of transmitting image using light. Li fi technology is a wireless technology that transfer data and other files in the presence of led illumination.
Li fi is the solution to this problem for radio frequency crisis. Lifi is the abbreviation of light fidelity and was expressed by harald hass who was a german physicist. Instead of using internet for the file transfer, a more flexible and very fastest mode of communication, lifi can be used. The term lifi refers to visible light communication vlc technology that uses.
Nov 22, 2016 scientists are also working on technology to make li fi work in the dark. Proper monitoring can save huge benefits in terms of energy and economy obviously. In aircraft lifi can be used for data transmission. Lifi technology in wireless communication revathi ganesan. Haas demonstrated the technology by streaming live video for the first time at ted global in july 2011, and the term lifi was coined by him during this talk. Audio transmission through visible light communication. According to haas, lifi technology is ready for iot and 5g 15. Lifi is the transfer of data through light by taking fiber out of fiber optics and sending data through led light bulb. Li fi technology seminar report, abstract college lib.
In li fi the information is transferred through light signals instead of radio waves and mostly wi fi plays an efficient role for wireless information coverage within the buildings whereas by using li fi we can provide the excel density data. Haas when he amazed people by streaming highdefinition video from a standard led lamp, at ted global in july 2011. Applicability of lifi technology for industrial automation. International journal of pure and applied mathematics volume. Li fi technology free download as powerpoint presentation. This paper aims to explore this technology and give a comparative study of lifi with other wireless communication technologies. Li fi may be contemplated as a complement to wi fi. Technology purelifi welcome to immersive connectivity. It acquired this name due to the similarity to wifi, only using light instead of.
Wireless data communication using li fi technology doi. It acquired this name due to the simil arity to wi fi, only using. This is so because after this distance the light gets scattered and could not fall properly on the photodiode. Lifi is a wireless optical networking technology that uses lightemitting diodes led s for data transmission. The spectrum now has to accommodate more mobile users.
The term li fi is similar to wi fi excluding the fact that light rather than radio technology is used for data transmission. The term lifi refers to visible light communication. Li fi is a vlc, visible light communication, technology developed by a team of scientists including dr gordon povey, prof. Where there is difficult to amateur optical fibers lifi is used. Li fi is the abbreviation of light fidelity and was expressed by harald hass who was a german physicist. Drawbacks to the technology include the need for a clear line of sight, difficulties with mobility and the requirement that lights stay on for operation. All the result of this paper is summarized in section 6. Pdf seminar report on li fi akanksha sharma academia. Government polytechnic kanpur seminar on li fi technology submitted in partial fulfillment of.
Lifi is a term of one used to describe visible light. Dartmouth university researchers discovered that dim leds would be able to send pulses undetectable by the human eye. Image transmission using visible light communication or lifi. In the year 2011, professor harold haas, university of edinburg, uk proposed the idea of. That is, it uses light instead of radio waves to transmit information. Lifi could offer safe, abundant connectivity for all areas of. Lifi is high speed bidirectional networked and mobile communication of data using light. Pdf we know that spectrum is the rare coin for communication engineers. Light fidelity lifi technology is a wireless communication system based on the use of visible light between the violet 800 thz and red 400 thz. It provides simple, faster and efficient wireless data communication. Wireless data communication using lifi technology doi. Image transmission using lifi bmes project ideas youtube. Signals are transmitted from one system to another by using led as a li fi transmitter and photodiode as a li fi receiver. Unlike wifi which uses the radio part of the electromagnetic spectrum, lifi uses the optical spectrum i.
International journal of pure and applied mathematics. Explore li fi technology with free download of seminar report and ppt in pdf and doc format. Explore lifi technology with free download of seminar report and ppt in pdf and doc format. It has just been tested in the real world last november 2015 and was said to be a 100 times faster than wifi. And instead of wifi modems, li fi would use transceiverfitted led lamps that can light a room as well as transmit and receive information. Li fi is useful in aircraft because the lights present above head can be used for data transmission. Instead of using internet for the file transfer, a more flexible and very fastest mode of communication, li fi can be used. Recent experiments on li fi shows the speed in the. Conclusion by using li fi in all the lights in and around a building, the technology could enable greater area of coverage than a single wi fi router. In traffic signals lifi can be used to communicate with the led lights of the cars. As told earlier lifi uses light to transmit data unlike radio waves. Applications of lifi lifi applications are varied as a result of its key features, such as directional lighting, energy efficiency, intrinsic security, high data rate capability, signal blocking by walls and integrated.
Li fi provides transmission of data through illumination by sending data. In operation theatres lifi can be used for modern medical instruments. If a user device is placed within a li fi hot spot i. Lifi is transmission of data through illumination, sending data through a led light bulb that varies in intensity faster than human eye can follow german physicist, dr. Also explore the seminar topics paper on li fi technology with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year computer science engineering or cse students for the year 2015 2016. Lifi technology seminar report and ppt for cse students. Lifi technology is a wireless technology that transfer data and. Peak transmission speeds of 8 gbps from a single light source have been demonstrated, and complete cellular networks based on lifi have been created. Applications of lifi can extend in areas where the wifi technology lacks its presence like medical technology, power plants and various other areas. The definition for lifi can be given as lifi is high speed bidirectional networked and mobile communication of data using light. Why lifi light internet could replace wifi in 10 years. Nowadays, with the rapid growth of wireless communications the problem of.
Unlike wi fi which uses the radio part of the electromagnetic spectrum, li fi uses the optical spectrum i. Lifi is a vlc, visible light communication, technology developed by a team of scientists including dr gordon povey, prof. Lifi can even work in ocean and river waters, thereby opening a tremendous application in military and security systems. The range of audio transmission was tested to be about 1520 m. Li fi technology ppt wi fi telecommunications free 30. Also explore the seminar topics paper on lifi technology with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year computer science engineering or cse students for the year 2015 2016. In september 20, a press release said that li fi, or vlc systems in general, do not require lineofsight conditions.
The bidirectional communication through the light is called light fidelity lifi. The below table is a comparison between wi fi and li fi. Conclusion thus, if li fi technology can be put into practical use, every bulb can be used as an alternative to wi fi hotspots. The issue of insufficiency can be eradicated because lifi uses light which is still not used in abundance. Lifi is a vlc, visible light communication technology, developed by the team of scientists including professor haas at the university of edinburg and deals with. Since li fi uses just the light, it can be used safely in aircrafts and hospitals where wifi is banned because they are prone to interfere with the radio waves. Haas demonstrated the technology by streaming live video for the first time at ted global in july 2011, and. Lifi is a term of one used to describe visible light communication technology applied to high sp eed wireless communication. Harald haas and dr mostafa afgani at the university of edinburgh. All of the street lamps can be transferred to lifi lamps to transfer data. Lifi can be the technology for the future where data for. Leds can be switched on and off faster than the human eyes can detect the operating speed of leds is less than 1 microsecond. Lifi provides high security because the light cannot travel or enter the walls and due to this the factor of misuse cannot occur. It has just been tested in the real world last november 2015 and was said to be a 100.
Standards used by lifi like wifi, lifi is wireless but uses. The infrastructure of such technology is already available where the light can be used. Lifi is the solution to this problem for radio frequency crisis. Government polytechnic kanpur seminar on lifi technology submitted in. The result of this paper can be used as a reference and. Light fidelity li fi technology is a wireless communication system based on the use of visible light between the violet 800 thz and red 400 thz.
Li fi is a term of one used to describe visible light communication technology applied to high sp eed wireless communication. Li fi will make us to proceed towards the cleaner, greener, safer and brighter future. Li fi technology ppt free download as powerpoint presentation. The term lifi refers to visible light communication vlc technology that uses as medium to deliver highspeed communication in a manner similar to wifi. The future technology in wireless communication 1691 interconnected data systems to monitor things like demand, grid integrity and core temperature. The principle of lifi is based on sending data by amplitude modulation of the light source in a welldefined and standardized way. Lifi technology is used to transmit the data using visible light communication by using lightemitting diodes. Since lifi uses just the light, it can be used safely in. Lifi comprises of multiple light bulbs that form a wireless network, offering a substantially similar user experience to. Lifi lightfidelity technology barjinder singh1 anita rani2 sonika3 1,2,3. Li fi light fidelity technology exploits the capabilities of an led light emitting diode to serve the purpose of data transmission with greater reliability, security and. Lightfidelity lifi international journal of computer science and. Li fi can even work in ocean and river waters, thereby opening a tremendous application in military and security systems.
Lifi comprises of multiple light bulbs that form a wireless network, offering a substantially similar user experience to wi fi except using the light spectrum. And security would be a snapif you cant see the light, you cant access the data. In offices and sc hools the maximum data is exchange happens within the sam e building. Mar 18, 2014 lifi is a wireless optical networking technology that uses lightemitting diodes leds for data transmission. Maybe you are familiar with wifi in todays network world, but you may not know much about the new lifi. In september 20, a press release said that lifi, or vlc. Lifi is designed to use led light bulbs similar slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Lifi was developed as a solution to the growing radio spectrum congestion problems. Lifi is transmission of data through illumination by taking the fiber out of fiber optics by sending.
Lifi is a paradigmshifting 5g technology sciencedirect. Li fi can already send 10 to 50 times the amount of data that wi fi can in a single area, depending on the exact setup, but laser leds could boost that as high as 100 times. It is useful in controlling traffic at traffic signals as it communicates with led lights of cars. The term lifi is similar to wifi excluding the fact that light rather than radio technology is used for data transmission.
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