Li Fi the Technology beyond Wi Fi

1. International Journal of Trend in Scientific Research and Development (IJTSRD) Volume 4 Issue 3, April 2020 Available Online: www.ijtsrd.com e-ISSN: 2456 – 6470 Li-Fi the Technology beyond Wi-Fi Sadaf Jamil Ahmed Shaikh Department of MCA, YMT College of Management, Kharghar, Navi Mumbai, Maharashtra, India ABSTRACT Today pace of net is an essential multifaceted nature and all individuals be it undertaking, foundations, enterprises, business visionaries is main thrust for buying accurate data at the specific time and definite spot. In this era of advanced science, connection to the internet has become possible through a wireless connection. This calls for swift net connectivity, generation and an immense field of channels. As the number of people accessing the wireless internet increase, the blocked air-waves make it tremendously difficult to latch on to a reliable signal. To solve this issue, a German Physicist Harald Haas has introduced a new technology Light Fidelity (LIFI). Taking the fiber out of fiber optics by sending data through an LED light bulb that varies in intensity faster than a human eye can recognize. As per his knowledge, this technology is based on the intensity and potential of the light-emitting diode. Lifi is used to transfer data through illumination. This paper is focused on Lifi, its application, features, working of Lifi and its comparison with existing technologies like Wifi, etc. KEYWORDS: Wi-fi, Li-fi, LED, Data Transformation, Visible Light Communication, photodiode, Radio Spectrum INTRODUCTION We all are reliant directly or indirectly on the internet for the fulfillment of our daily requirements. It is impossible to think of a day in our life when we are not connected to the internet. In today’s world, we are sharing lots of data so that a good quality of data sharing capacity is required. Professor Harald Haas in 2011 from the University of Edinburgh in the UK recommended an idea about the new form of wireless technology which is named “Data through Illumination”. And to implement this Haas used fiber optics to send data through an LED light bulb. He used a table lamp with an LED bulb to send a video of a blooming flower that was projected on the screen. The Lifi can be thought of as a light-based Wifi. The additional frequency band offers by lifi are 400 THz compared to that available in RF communication which is about 300 GHz. Lifi also uses the visible spectrum, it will help to improve concerns that the electromagnetic waves coming with Wifi could badly affect our health. Lifi connects to the internet with no wires. In Lifi, we can connect the internet with the help of an LED beam infinite range. To make communication between devices, a lifi will need a transceiver to send and receive the data. This transceiver will have a technique to make the LED enable to carry the data using the light called modulation technique. Lifi refers to a 5G visible light communication system. The Lifi is a secure data transmission system as the light cannot be penetrating through the walls. The working of Lifi is very simple as the driven is ON the sign transmitted is How to cite this paper: Sadaf Jamil Ahmed Shaikh "Li-Fi the Technology beyond Wi-Fi" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456- 6470, Volume-4 | Issue-3, April 2020, pp.193-196, URL: www.ijtsrd.com/papers/ijtsrd30309.pdf Copyright © 2020 by author(s) and International Journal of Trend in Scientific Research and Development Journal. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC (http://creativecommons.org/licenses/by /4.0) IJTSRD30309 BY 4.0) computerized as 1 while if it is OFF, the signal transmitted is a digital 0. We can encode different data and transmit it, by changing the rate at which LEDs flash. Working: The Li-Fi framework comprises two sections, the transmitter, and the collector. Driven light is utilized as a sign source between two end frameworks. Information is conveyed by the adjusted light from the LED. The microchip unit (MPU) system modulates and demodulates information at the transmitter and the recipient closes individually. The transmitter part tweaks the info signal with the necessary time span and transmits the information as 1's and 0's utilizing an LED bulb. These 1's and 0's are only the flashes of the bulb. The recipient part discovers these flashes utilizing a photodiode and intensifies the sign to deliver the yield. Li-Fi is actualized utilizing white LED lights at a downlink transmitter. A variety of LEDs can likewise be utilized for equal information transmission and diverse shaded LEDs to modify the LED recurrence so information is encoded for various recurrence. @ IJTSRD | Unique Paper ID – IJTSRD30309 | Volume – 4 | Issue – 3 | March-April 2020 Page 193

2. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 In our venture we first believer the information document to be moved into a twofold stream of 0's and 1's which is taken care of into the Li-Fi TX equipment which transmits this information through light. The power of light is tweaked to accomplish this objective. We set a high edge voltage as on state and a low edge voltage as off state. At whatever point the LED is in on state it transmits a 1 and when it is in off state it transmits a 0. The exchanging transistor is equipped for flipping the condition of drove in nanoseconds which speed up transmission somewhat. The Li-Fi RX subsequent to detecting the twofold stream sends it to the framework where the first information record is recovered. Design OF LI-FI Significant variables we should consider while structuring Li-Fi as following: 1.The presence of Light should be view. 2.Lamp driver where web association, switch and LED light associated. 3.For better execution use LED bulbs. 4.A photograph locator got information. Advantages of Li-Fi: Li-Fi, which utilizes visible light to transmit signals remotely, is an emerging technology ready to compete with Wi-Fi. Additionally, Li-Fi removes the constraints that have been put on the user by the Radio wave transmission, for example, Wi-Fi. Advantages points of Li-Fi innovation include: Efficiency: Li-Fi deals with visible light technology. Since homes and workplaces as of now have LED bulbs for lighting purposes, a similar source of light can be utilized to transmit information. Thus, it is exceptionally proficient regarding costs just like energy. The light should be on to transmit information, so when there is no requirement for light, it very well may be decreased to a point where it shows up off to the human eye, yet it is in reality still on and working. Accessibility: Wherever there is a light source, there can be the Internet. Lights are available all over – in homes, workplaces, shops, shopping centers, and even planes, implying that rapid information transmission could be accessible all over. Security: One fundamental favourable position of Li-Fi is security. Since light can't go through hazy structures, Li-Fi Internet is accessible just to the users inside a room and can't be broken by users in different rooms or structures. Cost: Instead of running near a mile worth of link, the LED- powered Li-Fi association could be utilized to shaft the data legitimately to the destination. Using a point-to-point exhibit, places of business can remain associated with one another without the utilization of extra links being laid starting with one access point to another. Li-Fi technology has an incredible breadth in the future: The broad development in the utilization of LEDs for brightening, in reality, gives the chance to incorporate the technology into plenty of environments and applications. Challenges faced by Li-Fi: The Li-Fi based communication system confronted with various types of difficulties. These difficulties limit its exhibition and can diminish the general productivity of the system. A portion of the primary difficulties are given below: LED light ON-OFF mode Indoor: Li-Fi based communication framework expects to furnish brightening with communication, so ON-OFF speed of an LED assumes a crucial job. For a Li-Fi based framework, it is constantly necessary to have a Light source in ON condition yet it starts the main problem of how information transmission will happen when the LEDs are killed. An information transmission can, in any case, be conceivable if the brilliance level of an LED transmitter is low. The diminishing degree of an LED bulb can be sorted out so that an ideal information rate can be accomplished utilizing light power. In crossbreed arrangement, RF or infrared can be valuable to give correspondence in LED OFF mode however in Li-Fi based correspondence it is as yet a test to locate a reasonable arrangement of how correspondence will be conceivable in any unfortunate circumstance when LEDs are in its OFF mode. Receiver Design issues in the case of mobility: Li-Fi receivers can consist of an optical photograph locator or an imaging sensor for getting the light emission. The photodiode is progressively useful for stationary users because right now FOV can be adjusted effectively to the LED. The imaging sensor has a relatively bigger FOV so they can be valuable for gadgets that bolster portability however imaging sensors are less vitality proficient and produce delays in information gathering thus can diminish the general feasible information rate. In this way it is trying to plan such an optical collector, that can control FOV misalignment and increment vigor. Thus for both static and versatility cases, an improvement in optical collector configuration is expected to guarantee high information rates alongside power productivity. Connectivity and Coverage area issues: A Li-Fi framework needs to keep up continuous and rapid availability inside an inclusion zone of a Li-Fi cell and between the Li-Fi cells. So advance plans for interface layer are required which can keep up rate adjustment and casing total to adapt up to network issues. In a Li-Fi based system, it is fundamental that smooth handover of devices just as the handover of innovation will happen for effective correspondence in cutting edge Li-Fi based framework. Li-Fi web availability issues: For Li-Fi based broadband access arrange, it is basic that LEDs driving circuits are associated with a web. The expense of web sending for Li-Fi and the impedance of remote associations is a constraining component that can decrease the reachable information rate utilizing the web. Effective planning methods are required to give alluring web network speed utilizing LEDs at moderate sending costs. In this manner, it turns into a moving errand to propose a model that can give web utilizing Li-Fi to enormous scope correspondence. Uplink transmission issues: A Wireless correspondence arrangement is complete without the office of uplink correspondence. Li-Fi uplink @ IJTSRD | Unique Paper ID – IJTSRD30309 | Volume – 4 | Issue – 3 | March-April 2020 Page 194

3. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 necessitates that transmitter and beneficiary keep up a directional connection during transmission. It can fundamentally lessen the general throughput of the system if the two gadgets are continually moving. So in Li-Fi, it is additionally a test that how the uplink traffic in a system will be work. The radio recurrence and infrared can be considered for transmitting uplink information in Li-Fi arrange yet at the same time progressively inventive thoughts are required for explaining the uplink issues in Li- Fi systems. Applications of Li-Fi: The applications for LiFi are boundless. Anyplace there is an LED light there can be information. LiFi is a platform technology that will expand the abilities of remote interchanges to places past even our current conception. Today there are genuine applications and advantages for actualizing LiFi. LiFi can empower secure remote correspondences, network in RF antagonistic conditions, for example, petrochemical plants and medical clinics. LiFi additionally gives fast, thick and dependable systems for big business situations and a pathway to empower brilliant structures, transport, urban communities, and countries. Underwater Communications Utilizing RF signals is illogical because of solid sign absorption in water. Li-Fi answers short-go interchanges. Submarines could think carefully to speak with one another, procedure information independently and send their discoveries intermittently back to the surface in Underwater Remotely Operated Vehicles (ROV). Another significant issue is that Li-Fi can even work submerged where Wi-Fi flops totally, consequently it's open for military operations. Traffic Management Li-Fi can help in dealing with the traffic in a superior way and the accident numbers can be diminished. Traffic lights can impart to the vehicle and with one another to deal with the traffic on the road. A traffic light can assume the job of the sender of the information to give data to the vehicle on the status of the street or about the circumstance of different autos. Additionally, vehicles can speak with one another and forestall accidents by changing data. For instance, LED vehicle lights can alarm drivers when different vehicles are excessively close. Aviation Routes We need to turn off mobiles in airplanes to forestall covering of cell phone signals with route and control signals utilized via airplane. Li-Fi can be securely utilized on planes since it doesn't meddle with RF. Since Data is available where light is available, we can utilize the lights over the seats in the plane as a hotspot. Clinical Applications One of the most significant highlights of Li-Fi is that it could be utilized in emergency clinics and clinical settings that require the absence of RF signals which influence the clinical gear. For instance, OTs (Operation theaters) don't permit utilizing Wi-Fi because of radiation concerns since the use of Wi-Fi hinders the signs for observing equipment‟s. Along these lines, it might be hazardous to the patient's wellbeing. Dazzle Indoor Navigation System The indoor route is helpful for everybody, and it is particularly basic for the outwardly hindered. We proposed such a route framework for the outwardly debilitated as appeared. Driven lights transmit noticeable light with area information and an installed framework or cell phone with an obvious light collector which gets the information. The inserted framework or cell phone computes the ideal way to an assignment and addresses the outwardly debilitated through an earphone. Literature Review: The vast majority of the individuals are utilizing Wi-Fi Internet devices, which will be helpful for 2.4-5GHz RF to convey remote Internet get to encompassed our home, workplaces, schools, and some open places too. We are very reliant upon these about pervasive services [7, 15]. While Wi-Fi can cover a whole house, school, the data transfer capacity is constrained to 50-100 megabits for every second (Mbps). It is the most present Internet administration, yet deficient for moving huge information records like HDTV motion pictures, music libraries, and computer games. The vast majority of the ward upon 'the cloud' or our own 'media administrations' to store the entirety of our records, including motion pictures, photographs, sound and video devices, games, the more and most transmission capacity and speed ought to be expected to get to this information. Accordingly, RF-based advances, for example, the present Wi-Fi are not the ideal way. Likewise, Wi-Fi may not be the most productive approach to give new wanted abilities, for example, exactness indoor acknowledgment. The optical remote advances here and there called obvious light correspondence (VLC), and all the more as of late alluded to as Li-Fi. Then again, offer a completely new worldview in remote advancements in the terms of correspondence speed, ease of use and adaptability, dependability. Comparison between Li-Fi and other technology: The Li-Fi makes the system utilizing the work area photosensitive component that works pair with unmodified light installation. The work area photosensitive component contains infrared LEDs to associate with the uplink channel. Right now, Fi works with information rate 5Mbps in the uplink and downlink channels and conceals to three meters go. Wi-Fi is dealing with radio waves to give remote web and system associations at fast. At the point when an RF current is going to a radio wire that makes an electromagnetic field to engender utilizing the room. Wi-Fi is indicated by the IEEE 802.11x standard. This technology uses the device AP for broadcasting a sign around the PC devices. Comparison of speed of various wireless technologies Technology Li-Fi Wi-Fi IEEE 802.11n ~150 Mbps IrDA Bluetooth NFC Future Enhancement: As light is all over the place and allowed to utilize possibilities increments, all things considered, of the utilization of Li-Fi innovation. On the off chance that this innovation comes to rehearse each lifi bulb will be utilized as Wi-Fi hotspot to transmit remote information. As the lifi innovation will be utilized which will prompt a cleaner, situating and signal Speed ~1 Gbps ~4 Mbps ~3 Mbps ~424 Kbps @ IJTSRD | Unique Paper ID – IJTSRD30309 | Volume – 4 | Issue – 3 | March-April 2020 Page 195

4. International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com eISSN: 2456-6470 greener, more secure and splendid future and condition. The idea of lifi is drawing in numerous individuals as it is allowed to use with no permit and quicker methods for information move. The extent of Li-Fi is tremendous. Li-Fi is a rising innovation and henceforth it has tremendous potential. The region of Li-Fi is extremely wide in the way of emergency clinics, scholastics, carriers and that's just the beginning. In future upgrade all the road lights, even vehicle headlights can be utilized as a hotspot for Li-Fi associating focuses to move information with the goal that the web can be gotten to anyplace. The headway right now a speed of more than 12GBps and can download a HD film in a flash. A compact Li- Fi can be brought into reality utilizing the said standards, with which we can transmit and get information at a rapid rate. This can be utilized in a cell phone which has a photo detector in it. Conclusion: The probabilities are various and hence for the investigation should be possible. On the off chance that his innovation may be placed into down to earth use, each bulb can supply something like a Wi-Fi hotspot to help transmit remote information and we will continue toward the arrangement, greener, more secure and better future. The idea of Li-Fi is presently pulling in loads of intrigue, not least since it might offer a veritable and furthermore productive choice to radio- based Wi-Fi. As a developing number of people and their numerous devices get to remote online worlds, the wireless transmissions have become progressively stopped up, making it progressively increasingly hard to get a fair, rapid sign. This may comprehend issues like the deficiency of radio-recurrence data transfer capacity. It has a decent opportunity to supplant the customary Wi-Fi in light of the fact that as an ever-expanding populace is utilizing remote web, the wireless transmissions are getting progressively stopped up, making it increasingly more hard to get a dependable, rapid sign. Right now, talked about the working of li-fi and its application. additionally, the points of interest and difficulties looked by li-fi. This paper likewise spread the contrast between li-fi and wi-fi. Li-Fi correspondence client consistently needs view network with its light source, along these lines, some development looks into work is required to defeat this impediment to executing this technology in practice. References: [1]https://medium.com/acmvit/li-fi-the-future-of- internet-e573eab6bd0d [2]https://purelifi.com/technology/ [3]http://www.kscst.iisc.ernet.in/spp/39_series/SPP39S/ 02_Exhibition_Projects/107_39S_BE_1098.pdf [4]https://solutionsreview.com/wireless-network/the- top-benefits-and-disadvantages-of-li-fi-technology/ [5]https://www.techopedia.com/7/31772/technology- trends/what-are-the-advantages-and-disadvantages- of-li-fi-technology [6]http://tec.gov.in/pdf/Studypaper/lifi%20study%20pa per%20-%20approved.pdf [7]https://arxiv.org/pdf/1610.07741.pdf [8]http://www.aijet.in/v3/1601003.pdf [9]IMPACTP002.pdf [10]Overview LI-Fi technology.pdf @ IJTSRD | Unique Paper ID – IJTSRD30309 | Volume – 4 | Issue – 3 | March-April 2020 Page 196