Pdf an architecture for wireless communication systems using li. In this paper, we have proposed an architecture which uses lifi. Lifi technology is based on leds for the transfer of data. Iot based indoor localization with lifi in smart homes. This paper objective is to study and describe the lifi technology. Jan 24, 2014 in the days where internet has become a major demand, people are in a search for wifi hotspots. Mar 20, 2018 best pdf study papers on lifi technology explain the architecture, working, modulation techniques and comparison with wifi and vlc.
Vlc is a oneway, pointtopoint optical communications technology while lifi enables twoway communications over multiple frequencies for mobile and networked connections. Rf technology in all aspects or parameters mentioned above. The layers above the physical and data link layers include tcpip. Lifi 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. That is, the light can belong to the invisible, ultraviolet or the visible part of the spectrum. As a result, it can be used in high security military areas where rf. That is, it uses light instead of radio waves to transmit information. Lifi, first coined in extends the concept of visible light communication vlc to achieve high speed, secure, bidirectional and fully networked wireless communications. The low bandwidth problem in rf communication is resolved in vlc because of the availability of the large bandwidth as illustrated in fig. Framework for data communication in the hospital using li. Lifi is indeed a compliment to wifi by offering faster internet access for mobile devices.
An introduction to lifi technology history lifi vs wi. Entire transmission system can be built on a cost effective single silicon chip that operates in the unlicensed. Lifi is a great technology and it is the complement of wifi as noted in this ieee techblog post. In this article we will share the lifi tutorial that covers lifi system basics. The lifi is a wireless communication system in which light is used as a carrier signal instead of traditional radio frequency as in wifi 18, 20. Framework for data communication in the hospital using lifi. An architecture for wireless communication systems using lifi technology. The binary data is captured by few light receptors which are installed on all types of connecting devices such as computer tablets, phones, televisions, or appliances. Toward designing a lifibased hierarchical iot architecture. There are numerous applications of this technology, from public internet access through street lamps to autopiloted cars that communicate through their headlights. History of networks in the olden days, people formed a network in orderto transmit a piece of data from one place to another. Wifi is a physicallink layer interface, as is ethernet. Wifi is a high speed internet connection and network connection without use of any cables or wires. Lifi can be the technology for the future where data for laptops, smart phones, and tablets will be transmitted through the light in a room.
Lifi is a wireless communication technology that uses the infrared and visible light spectrum for high speed data communication. And instead of wifi modems, lifi would use transceiverfitted led lamps that can light a room as well as transmit and receive information. Light fidelity lifi is a new short range optical wireless communication technology which provides the connectivity within a local network, by using lightemitting diodes leds to transmit data depending on light illumination properties. The lifi technology was invented by professor harald hass of university of edinburgh. 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. Recently, lifi technology has attracted the research community.
An architecture for wireless communication systems using li. The wide range of the wimax technology depends on the height of the antennas, if they are installed at the suitable position from where there is no barrier between the transmitter and receiver, and then we can get better range and service from it. Pdf lifi technology transmission of data through light. In october 2011, companies and industry groups formed the lifi consortium, to promote highspeed optical wireless system and to overcome the limited amount of radiobased wireless spectrum available by exploiting a completely different part of the electrom agnetic spectrum. Visible light part of the electromagnetic spectrum.
To utilize lifi technology, we need two components. This owc technology uses light from lightemitting diodes international journal of pure and applied mathematics volume 118 no. Lifi is a cellular communication system and the data rate is not dependent on the line of sight but on the signal quality at the device. In august 20, lifi systems were able to demonstrate data rates of over 1. We shall explain in this report the basic foundation of this new technology. Lifi is a derivative of optical wireless communications owc technology, which uses light from lightemitting diodes leds as a medium to deliver network, mobile, highspeed communication in a similar manner to wifi. Although lifi has some disadvantages but it shows huge advancements in the field of wireless technology. The future technology in wireless communication 1691 interconnected data systems to monitor things like demand, grid integrity and core temperature. Lifi architecture consist numbers of led bulbs or lamps, many wireless. The wireless network is operating three essential elements that are radio signals, antenna and router. Also a complement to rf communication wifi or cellular networks, or even a replacement in contexts of data broadcasting. We investigate lifi in the context of novel 5g technologies to solve the looming spectrum crisis in wireless communications.
In view of these developments, we propose to carry out a study on feasibility of deploying lifi technology along with the existing rf infrastructure. Unlike wifi which uses the radio part of the electromagnetic spectrum, lifi uses the optical spectrum i. On the other hand, it has to be ensured that the lifi systems do not pose any health hazards and that they are correctly installed so that they do not create any emi. Lifi can transmit at multiple gigabits, is more reliable, virtually interference free and uniquely more secure than radio technology such as wifi or cellular. In layered architecture, lifi consist of 3 stages i. Reference 3 describes an integrated architecture for 5g mobile networks that includes scs and enhanced wifi as the main scaling factor for wireless capacity. Transmission speeds of up to 10 gbps have been demonstrated in our lab and it has also been shown that lifi does not required lineofsight. Sharma, 2 akshay sanganal, 3 sandhya pati 1, 2, 3 department of computer engineering, fr. Proper monitoring can save huge benefits in terms of energy and economy obviously. As time passed the technology increased and welaunched satellites into space and thus were in aposition. Lifi is a wireless optical networking technology that uses lightemitting diodes led s for data transmission. Lifi technology enables highspeed data transmission via pulsatinglight sources that seem static to the naked eye. With the advances in technology a new mode ofnetworking was developed by using the wires as amedium wired networking.
Lifi is evolve to overcome the rate speed in wifi, while using lifi the rate speed can reach until 14 gbps. Pdf lifi technology deals with the huge data rate which is in the range of 150 mbps to 10 gbps and uses the visible light of electromagnetic. The important standard for lifi technology is ieee 802. In 7 light positioning architecture for a typical room has been investigated by.
Lifi technology has shown lots of scope since its inception. Best pdf study papers on lifi technology explain the architecture, working, modulation techniques and comparison with wifi and vlc. The revolution in the field of solid state lighting leads to the replacement of florescent lamps by light emitting diodes leds which further motivates the usage of vlc. This lifi tutorial covers lifi network architecture, lifi protocol stack, lifi phy, lifi mac, lifi bands, lifi modulation types ook, vppm, csk. Being a visible light communication vlc, lifi uses visible light of electromagnetic spectrum between 400 thz and 800 thz as optical carrier for data transmission and illumination. Visible light communication vlc systems employ visible light for communication that occupy the spectrum from 380 nm to 750 nm corresponding to a frequency spectrum of 430 thz to 790 thz as shown in fig. Download pdf papers for lifi seminar report and project report. Light fidelity lifi is a visible light communication vlc based technology that making a light as a media of communication replacing the cable wire communication. Lifi provides transmission of data through illumination by sending data. Get the most relevant papers for lifi seminar report.
It is highly portable and can be constructed in everywhere. An architecture for wireless communication systems using lifi. Led lamps are the source used for encoding data by switching the light on and off during regular intervals to create a binary code. The lifi architecture contains various devices such as led bulbs, mobile devices and the photo detector which receives the binary data over light. Therefore, we are now studying wireless system concepts based on lifi technology. Ijcat international journal of computing and technology, volume 1, issue 9, october 2014 issn. Lifi or new life of data communication is a better alternative to wifi in wireless communication.
Transmission speeds of up to 10 gbps have been demonstrated in our lab and it has also been shown that lifi does not required line of sight. Lifi technology a visible light communication 1 jay h. The architecture of lifi according to 14 the paper categorized the architecture based on layered. In the days where internet has become a major demand, people are in a search for wifi hotspots.
In the paper, we discuss the usage of vlc applied as lifi as a secure method to transmit data wirelessly in a more secure method compared to the traditional wifi architecture. Worlds first transceiver i ntegrated on single chip. Lifi, which uses visible light to transmit signals wirelessly, is an emerging technology poised to compete with wifi. The lifi technology uses unregulated spectrum of visible light that does not need licensing. The transfer of the data can be with the help of all kinds of light, no matter the part of the spectrum that they belong. While in the beginning i have tried to give a general view about this topic. Being a visible light communication vlc, lifi uses visible light of electromagnetic spectrum between 400 thz and 800 thz as. I have made this report file on the topic lifi technology.
Hence, a new technology lightfidelity lifi has been introduced recently for this purpose. Lifi is a paradigmshifting 5g technology sciencedirect. One of the biggest concerns about using lifi for wireless communication is that it would require a line of sight to gain a signal. It is a subset of optical wireless communications owc. What are the advantages and disadvantages of lifi technology.
On a practical level, this means that all rabbit sample programs and customer applications for tcpip that are run on an ethernet interface will also run on a wifi interface. My efforts and wholehearted cocorporation of each and everyone has ended on a. Lifi has shown that its 100 times faster than wifi. Wifi wireless technology working principles, types and. Applications of lifi can extend in areas where the wifi technology lacks its presence like medical technology, power plants and various other areas. The development of the wireless communication leads to advance research in lifi. The lifi technology can be leading us a greener and safer future. It is important to note that lifi supports user mobility and multiuser access. The technology is very new and was proposed by the german physicist harald haas in 2011. Lifi could offer safe, abundant connectivity for all areas of.
Sep 05, 2018 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. Governments, both state and central, seek to support growth and improve competitiveness, and strengthen their performance within the global economy through improved governance, sector modernisation, and enhanced regional integration. Lifi is a wireless technology holds the key to solving challenges faced by 5g. Architecture of lifi system lifi which can be the future of data communication appears to be a fast and cheap optical version of wifi. Current wireless communication technologies, such as wirelessfidelity wifi and bluetooth, use radio waves as the basic medium in. Allows wireless transfer of audio and video data at upto 5gb per second. The proper arrangement of led play part and parcel role in this new technology so there needs to investigate the novel architecture and. Lifi was crea ted in 1997 and created by harald haas. Toward designing a lifibased hierarchical iot architecture ieee.
In this paper, we have proposed an architecture which uses lifi technology for communication without having much effort for replacing the existing communication infrastructure. Pdf an architecture for wireless communication systems. 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 works in three modes as mentioned above in the figure above. Security would not be an issue because if you cant see the light, you cant access the data. I have tried my best to elucidate all the relevant detail to the topic to be included in the report. This paper presents a survey of the potential applications, architecture, modulation techniques, standardization and research challenges in vlc. Light bounces off of surfaces and therefore lifi is not strictly a line of sight technology, however it is strongest in line of sight conditions. Lifi technology lifi is a wireless technology holds the key to solving challenges faced by 5g. In this section, the overall framework architecture is presented for how lifi technology can be applied to hospital environment. This paper presents an introduction of the lifi technology including the architecture, modulation, performance, and the challenges. Lifi technology is a wireless communication system based on the use of visible light. Abstract of lifi technology 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 network. Thamarai selvi 3, senthil kumar 4, assistant professor department of ece, angel college of engineering and technology, tiruppur.
The result of this paper can be used as a reference and knowledge to develop some of the lifi technology. Light fidelity lifi is a new wireless communication technology similar to wifi, but it uses visible light communication vlc instead of radio frequency used by wifi. It has hit almost all the sectors and is definitely going to be boon for our society. We also have close to 5 billion mobileconnections which transmit a data over600tb. Smart governance and technology 7 why is architecture important in egovernment transformation. Lifi technology a seminar report submitted by dhabekar roshan vitthalrao in partial fulfillment for the award of the degree of master of computer application in computer science school of computational science srtmu,nandedmaharashtra april. That is, the light can belong to the invisible, ultraviolet or. So these signals will provide many facilities in future. An architecture for wireless communication systems using. This paper focuses on developing a lifi based system and analyzes its performance with respect to existing technology. Since we have a data center in the architecture, we.
Vlc is a oneway, pointtopoint optical communications technology while lifi enables twoway communications over multiple frequencies for. Pdf novel architecture for future lifi wireless technology. The idea of lifi technology attracting us a great deal of interest because its latest and very efficient alternative to radiobased wireless technology. Advances in lifi technology were on display over the years. In addition, a lifibased iot architecture is proposed in this paper, which relies on the collection of data from.
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