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LiFi: The Future of the Internet

With LiFi - enabled LED light bulbs, the ordinary driver - circuit is replaced with a LiFi driver - circuit used to transmit encoded data by controlling the intensity of the LED light." It was here that he first demonstrated how light from an LED bulb could transmit more data than a cellular tower."LiFi uses the light waves from LED light bulbs -- that are rapidly replacing incandescent light bulbs for their energy savings and durability -- to transmit data so it provides illumination and wireless data communications at the same time and with the same device."Standard LED light bulbs are controlled by a driver - circuit that turns the LED on and off, or dims and brightens it." Li - fi can be used to build an omnipresent navigation system by utilising the traffic lights system already in place as is being tried out in the municipality of Meyrargues, France, which inaugurated its public Li - Fi network in November last year." 

"LIGHTFAIR offered free Wi - Fi in Chicago this year and that was great, except that 20,000 people were trying to get on the system and it was almost useless, "Reid said." 0

Last year, the Ministry of Industry and Information Technology of China announced that a Chinese system of Visible Light Communication or Li - Fi had managed to achieve a traffic rate of 50 Gbits per second." Expect to hear a whole lot more about Li - Fi - a wireless technology that transmits high - speed data using visible light communication ( VLC ) - in the coming months." If street lighting columns were fitted with LED sources, for example, they could provide the next 5 G and 6 G networks." It is a lighting equivalent of WiFi but utilizes an untapped lighting spectrum instead of the congested radio spectrum to facilitate wireless internet connectivity."The issue is that this spectrum, which includes 3 G, 4 G, 5 G, WiFi and Bluetooth, is a finite resource, with analysts anticipating that it will cover only 5 % of capacity demand in the coming years." 

Each LED in a LiFi system acts as an access point, and due to the size ( order of millimeters ) of the AP 's, their networks are called attocell networks, unlike WiFi femtocell networks." In this way, a connectivity ecosystem encompassing LiFi, 5 G and WiFi can provide the greatest bandwidth and support a greater quality of service for customers." "Though strict line of sight isn't required for data transmission due to reflected light, light and therefore data is confined by obstacles such as walls." Because the data is transmitted via light, it can travel wherever light can -- like deep underground where WiFi is limited." 

Sensors can shut off the lights when the space is vacant thereby supporting transmission of data only when and where it is needed.This one way is sufficient in order to carry out the data transmission, but encounters limits in the case of data to be exchanged."Unlike radio, data transmission by light, as mentioned by the IOP, actually provides greater security : Because who would want to read data transmitted in this way would theoretically have to be receiving the light at the exact same time and place.They have also worked with leading companies across several industries such as telecommunications company O2 Telefonica, lighting companies Zumtobel and Wipro." Light Fidelity ( LiFi ) was introduced by Prof. Harald Haas, from the University of Edinburgh in the UK, in his 2011 TED Global Talk titled "Wireless Data from Every Light Bulb "."

Researchers at the University of Oxford have shown that LiFi can work in lab demonstrations at speeds of 224 Gbps, illustrating the huge progress since Haas introduced LiFi in his 2011 TED talk."The term 'Li - Fi' was coined by German Physicist Harald Haas and introduced by him during his 2011 TED Talk." The LiFi Research and Development Centre at the University of Edinburgh undertakes research, promotes knowledge exchange with the global LiFi community, and operates a Flexible Open Collaboration model with partners to develop LiFi products and new spin - out companies.

LiFi also holds hope for ultra - highspeed data transmission in environments where RF emissions are controlled, such as hospitals, schools, and aircraft."Trulifi is aimed at such professional markets, and Signify says it could be used in hospitals, where radio frequency ( RF ) communication may be restricted, or in areas where the signal is already crowded."Intrinsically safe environments such as refineries, oil platforms or petrol stations where electromagnetic radiation from the antennae of RF communication systems could spark explosions."

In some electro environments such as hospitals or airplane cockpits, it can be difficult acquiring a seamless internet connection by radio waves since the risk of interference is very high.LiFi offers benefits over wi - fi as it can be used in places where radio frequencies may interfere with equipment, such as in hospitals, or where wi - fi signals can not reach or are weak, such as underground.

Wi - Fi is based on Radio Frequency ( RF ) technology which uses a frequency within the electromagnetic spectrum associated with radio wave propagation." ur increasingly connected world is in the midst of a huge problem : a rapidly growing number of users, devices and services competing for a limited radio frequency ( RF ) spectrum."With the radio spectrum already overloaded and the number of RF devices growing exponentially, the reliability of your network is expected to deteriorate further.

A major challenge is the limited availability of the radio frequency ( RF ) spectrum - as shown in the frequency allocation chart, there are virtually no wavelengths ( white spaces ) available for public use.

Wi - Fi : When a radio frequency current is supplied to an antenna, it creates an electromagnetic field capable of propagating through space." 

"LiFi is currently running data at up to > 1 Gbps in laboratory environments, about 10 times faster than Wi - Fi." 

"LiFi can transmit data at incredible speeds in the range of 200 Gbps in laboratory conditions using direct Line of Sight ( LOS )." 

"Haas said it could securely download data at 1 Gigabit per second ( Gbps ) - almost 10 times faster than with WiFi.LiFi bulbs have been shown to provide speeds of up to 1Gbps, and in a controlled laboratory test they 've been demonstrated to offer theoretical rates of up to 224Gbps.Current records show that LiFi in the laboratory attains 8GB / s, in other words 160 times faster ( 8GB / s = a few seconds transfer for 1 DVD ).Lght Fidelity communication is a new technology with widespread application in both ship - to - ship and internal ship communication."

Unlike many Navy systems that require contract support, the RONJO LiFi system would make ships wholly independent of technical support from the shore.

Starting with the Arleigh Burke - class guided missile destroyer, the Navy has implemented positive - pressure air filtration systems called the Collective Protection System ( CPS ) aboard ships.Together, the RONJO solution to Ship - to - Ship communication and PureLiFi solution to WiFi limitations provide a lucrative opportunity for the Navy." 

Positive - pressure ventilation systems and the preexisting shipboard requirement to control externally emitted light at sea make ships a great platform for LiFi."There will be many engineering challenges to the ultimate adoption of LiFi, but the technology industry is making large investments in LiFi and these advances will make later adoption more affordable."

"Due to the recent nature of advances in LiFi technology, commercial products are limited, but many companies are demonstrating exciting potential for the technology."One of the reasons for this is increasing interest in LiFi ( Light Fidelity ) technology, which some experts predict may replace Wi - Fi."At this early phase of the technology, the most suitable applications are where LiFi's added value justify the cost and risk of early adoption." By embedding a LiFi component into devices, LiFi technology can overcome the greatest hurdle to the take - off of IoT, the risk of an RF spectrum crisis."Conversely, the proposed LiFi system takes advantage of visible light already used in traffic lights and front and tail lights in vehicles." Figure 13 depicts the average number of vehicles,, waiting in the traffic light for different values of traffic loads in both directions and switch rate of the traffic light." To this end, we assume that vehicles arrive and remain in the vehicle crossing where the traffic light is installed, a random, exponentially distributed time." Therefore, the proposed model does not consider the cases where some vehicles successfully leave the crossing ( when the traffic light in their direction is green ) while some vehicles can not leave the crossing, remaining there for multiple changes of the traffic light." 7

We further assume that the front vehicle ( the car next to the traffic light ) is able to communicate to the car immediately behind it by using its own tail lights and the front lights of such vehicle, and so on and so forth."The Location Based Services ( LBS ) and Real - Time Location Systems ( RTLS ) market itself is growing at a CAGR of 37.1 % and is expected to reach 54.95 Billion USD by 2020, from 11.36 Billion USD in 2015. The growth of location - based technologies has not escaped anyone's notice as location continues to revolutionize location - based services, analytics, advertising revenue opportunities and much more.LAccording to Global Market Insights Inc, the Li - Fi market size is anticipated to reach USD 9 billion by 2023, at over 80 % CAGR from 2016 to 2023."Development and standards proceeded until demonstration projects and first commercialization, leading to Global Market Insights forecasting a global market value of $ 75 billion for the technology by the year 2023.

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