The idea of lifi technology attracting us a great deal of interest because its latest and very efficient alternative to radiobased wireless technology. In simple terms, li fi can be thought of as a lightbased wi fi. Led lamps are the source used for encoding data by switching the light on and off during regular intervals to create a binary code. Due to this, the first technology gains an advantage in terms of higher bandwidth. Philips lifi systems introducing lifi technology youtube. Here, data is transmitted using light whose intensity varies faster than human eye to capture. The term was first introduced by harald haas during a 2011 tedglobal talk in edinburgh. It is a lightbased communication technology that uses mostly visible light waves to deliver data, instead of radio waves as it is the case of wi fi.
As told earlier li fi uses light to transmit data unlike radio waves. Li fi is a term of one used to describe visible light technology applied to high speed wireless communication. The li 1st marked the introduction of a groundbreaking wireless communication technology and became the worlds first lifi technology available on the market. 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. There are millions of street lamps deployed around the world. Light fidelity lifi is a visible light communication vlc based technology. It is a lightbased communication technology that uses mostly visible light waves to deliver data, instead of radio waves as it is the case of wi fi the system works by transmitting data as light signals using led light bulbs. Technology purelifi welcome to immersive connectivity. High data transmission rates of up to 10gbps can be achieved. It acquired this name due to the similarity towi fi, only using light instead of radio. Jan 24, 2014 in this paper, the comparison is made between wi fi and li fi technology. Lifi technology is being developed into a ubiquitous systems technology, consisting of application specific combinations of light transmitters, light receivers including solar cells, efficient computational algorithms and networking capabilities that can be deployed in a wide range of communication scenarios and in a variety of device platforms. This paper also discusses the working, implementation and improvements in li fi technology.
Lifi is a wireless optical networking technology that uses lightemitting diodes led s for data transmission. Li flame which was released in february 2015, claimed to be the first lifi product that allowed for mobile wireless communications. An introduction to lifi technology history lifi vs. I would like to connect li fi receiver to the fpga. Lifi communications system was coined by harald haas in 2011, based on the idea of transmitting. Li fi technology free download as powerpoint presentation. Li fi technology, implementations and applications pdf. Li fi, which uses visible light to transmit signals wirelessly, is an emerging technology poised to compete with wi fi. Lifi technology is not a replacement of a widely used wifi technology. 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. Li fi is a subset of optical wireless communications owc and can be a complement to rf communication wi fi or cellular network, or a replacement in contexts of data broadcasting. Lifi build your own safe wireless communication network with. The network is also referred as vpan or vlc personal area network.
The affordable, speed change in the optical form of wifi is the lifi and it is based on vlc i. Unlike wi fi which uses the radio part of the electromagnetic spectrum, li fi uses the optical spectrum i. Contents introduction to lifi history of lifi implementation of lifi how it works lifi vs wi fi application advantages limitation future developments conclusions 3. Wi fi has been developed for mobile computing devices, such. Visible light part of the electromagnetic spectrum. Section 2 discusses the introduction to li fi and wi fi. 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. Lifi is designed to use led light bulbs similar to those currently in use in many energyconscious homes and offices. Posts about introduction of li fi technology written by sknit95. A brief introduction e ramadhani 1, g p mahardika 2 1,2 department of informatics, universitas islam indonesia, yogyakarta, indonesia email.
Lifi technology seminar report and ppt for cse students. O each of these street lamps could be a free access point. Dec 22, 20 introduction to li fi technology 122220 30 30. Introduction in simple terms, li fi can be thought of as a lightbased wi fi. Lifi also known as light fidelity is a technology for the wireless transmission of data between devices lifi uses light as a medium for transmission of data. Introduction the term of li fi technology basically is called visible light communication vlc.
Lifi is a wireless optical networking technology that uses lightemitting diodes leds for data transmission. Li fi can solve problems related to the insufficiency of radio frequency bandwidth because this technology uses visible light spectrum that has still not been greatly utilized. In the year 2011, professor harold haas, university of edinburg, uk proposed the idea of. Lifi technology in wireless communication revathi ganesan. That is, it uses light instead of radio waves to transmit information.
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. It is a short range wi reless communica tion system based on light illumination from led, and use the visible light as a signal c. However, lifi bulbs are outfitted with a chip that modulates the light imperceptibly for optical data transmission. This will help the reader to understand the difference between lifi and wifi in more detail.
Lifi signals can be defined by the area of illumination, which means interference is much simpler to avoid and even stop altogether. Contents introduction to li fi history of li fi implementation of li fi how it works li fi vs wi fi application advantages limitation future developments conclusions 3. If the lifi technology can put into practical use, every led bulb can be used something like a wifi hotspot to transmit the wireless data. Li fi short for light fidelity is wireless communication technology which utilizes light to transmit data and position between devices. Visible light communication where vlc is a medium of information communication which avails quick pulses of light to send the data wirelessly. Lifi could offer safe, abundant connectivity for all areas of. Lifi is the abbreviation of light fidelity and was expressed by harald hass who was a german physicist. Jun 11, 2018 li fi stands for light fidelity and is a visible light communications vlc system which runs wireless communications that travel at very high speeds. Li fi provides transmission of data through illumination by sending data. Li fi technology, proposed by the german physicistharald haas, provides transmission of data through illumination by sending data through an led light bulb that varies in intensity faster than the human eye can follow. The li fi technology used transceiver instead modems in wi fi, its equipped with led lamps that can transmit and receive information, and at the same time be used for room lighting. Implementation of lifi technology for home automation and.
The definition for li fi can be given as lifi is high speed bidirectional networked and mobile communication of data using. Introduction to indoor networking concepts and challenges in lifi. Currently, the transmission rate of this technology is 10gbits. In technical terms, li fi is a light communication system that is capable of transmitting data at high speeds over the. Although li fi is mostly used to offload data or information from existing wi fi networks, it may. Maybe you are familiar with wi fi in todays network world, but you may not know much about the new li fi. From the above, we can compare lifi vs wifi and following difference between lifi and wifi can be derived. The benefits of lifi emerge as a result of unlocking the vast amount of licensefree and secure electromagnetic spectrum that lies in the infrared and visible light regions. Mar 16, 2018 philips lifi systems offer a new way to connect wirelessly, made possible by sending and receiving data via led light. The immense use of li fi may solve some bottleneck of data transmission in wi fi technology. Harald haas professor harald haas, from the university of edinburgh in the uk, is widely recognised as the original founder of li fi.
And instead of wi fi modems, li fi would use transceiverfitted led lamps that can light a room as well as transmit and receive information. New communication lifi technology lifi information. Whether youre using wireless internet in a coffee shop, stealing it from the guy next door, or competing for bandwidth at a conference, youve probably gotten frustrated at the slow speeds you face when more than one device is tapped into the. The term was first introduced by harald haas during a 2011 tedglobal talk in edinburgh in technical terms, lifi is a light communication system that is capable of transmitting data at high speeds over the visible light, ultraviolet, and infrared spectrums. This new technology is known as li ght fidelity lifi. Light fidelity lifi is a visible light communication vlc based technology that. Nonetheless, li fi is currently in the development zone and is being implemented quite successfully in aircraft cabins, hospitals and nuclear power plants and is predicted to arrive in our. For the love of physics walter lewin may 16, 2011 duration.
Philips lifi systems offer a new way to connect wirelessly, made possible by sending and receiving data via led light. This technology can transmit the data through high illumination led devices that varied the intensity is very faster than the human eyes can follow1,4 the led bulb can cycle off and on. Maybe you are familiar with wifi in todays network world, but you may not know much about the new lifi. Radio frequency technology such as wi fi is vulnerable to interference from a wide range of devices such as cordless phones, microwaves and neighbouring wi fi networks. However, li fi uses electromagnetic waves of visible light, while wi fi the radio waves. The future technology in wireless communication 1691 interconnected data systems to monitor things like demand, grid integrity and core temperature.
Already today in some cases the current wireless solutions are not giving the. In lifi 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 lifi we can provide the excel density data. The wifi technology wifi uses radio technology to transmit and receive data at high speed. The term lifi refers to visible light communication vlc technology that uses light as. Lightfidelity lifi international journal of computer science and. In simple terms, lifi can be thought of as a lightbased wi fi. In this paper, the comparison is made between wi fi and li fi technology. The technology is very new and was proposed by the german physicist harald haas in 2011. Harald haas during his ted global talk, is bidirectional, high speed and fully networked wireless communications, like wi fi, using light. Li fi technology seminar ppt with pdf report construction of a lifi system. This new technology is known as li ght fidelity li fi.
Lifi technology for light fidelity is a new method to connect wirelessly mobile devices and other connected devices using led lights. Lifi short for light fidelity is wireless communication technology which utilizes light to transmit data and position between devices. Transmission of data through light semantic scholar. It works on the principle of visible light communication i. Since homes and offices already have led bulbs for lighting purposes, the same source of light can be used to transmit data. Led li fi router prototype will generate super fast, unhackable wireless internet. With the innovation in technology and the number of users, the existing radiowave spectrum fails to. Lifi can transmit at multiple gigabits, is more reliable, virtually interference free and uniquely more secure than radio technology such as wi fi or cellular.
Li fi and wi fi technologies based on similar protocols ieee 802. Lifi short for light fidelity is wireless communication technology which utilizes light to transmit. Pdf seminar report on li fi akanksha sharma academia. As we know lifi technology is based on vlc principle. Wi fi is great for general wireless coverage within buildings, and lifi is. May 29, 2015 also, although, li fi is supposed to be ten times cheaper than wi fi, the former has quite high installation costs and ranks lower in the reliability area. Pdf light fidelity lifi is a visible light communication vlc based technology that making a light as a media of communication replacing.
Li fi technology ppt wi fi telecommunications free. Lifi is a wireless optical networking technology that uses light emitting diodes leds for transmission of data. Proper monitoring can save huge benefits in terms of energy and economy obviously. Oledcomm used a li fi enabled lightbulb to transmit data at speeds as fast as 1 gigabits per second gbps. Led lamps are the access point to any number of users. 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. You cant live without it, and yet somehow, it makes accomplishing simple tasks so much more difficult.
In section 3, the history and future scope of li fi technology has been discussed. He coined the term li fi and is chair of mobile communications at the university of edinburgh and cofounder of purelifi. With li fi, your light blub is essentially your router. Wifi wireless technology working principles, types and. Li fi technology ppt free download as powerpoint presentation. Lifi technology is a wireless technology that transfer data and other files in the presence of led illumination. The system works by transmitting data as light signals using led light bulbs. Introduction to lifi technology linkedin slideshare. Introduction wifi connects computers to each other, to the internet and to the wired network. What are the advantages and disadvantages of lifi technology. By using this technology we can exchange the information between two or more devices. Nov 23, 2015 for the love of physics walter lewin may 16, 2011 duration. The characteristic of li fi technology comparing with wi fi.
Instead of using modems, li fi uses led bulbs with transceiver. The introduction of oofdm means that a new drive for standardization of. Lifi is a vlc, visible light communication technology, developed by the team of scientists including professor haas at the university of. Introduction lightemitting diodes leds have been widely deployed for illumination, due to their high performance and energy efficiency properties compared. It uses common household led light bulbs to enable data transfer, boasting speeds of up to 224 gigabits per second. Posts about introduction of lifi technology written by sknit95. Li fi technology ppt wi fi telecommunications free 30. The term lifi refers to visible light communication vlc technology that uses light as medium to deliver highspeed communication in a manner similar to wifi and complies with the ieee standard ieee 802. Lifi is a wireless technology holds the key to solving challenges faced by 5g. Explore lifi technology with free download of seminar report and ppt in pdf and doc format.
1300 652 1478 563 133 1299 276 162 1435 506 796 1397 794 849 1381 564 511 1675 1183 1273 292 9 1052 646 1595 918 1597 259 1345 779 739 144 272 165 1236 509 1185 1171 627 567 654 397 8