LI-FI TECHNOLOGY

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LI-FI TECHNOLOGY :

LI-FI TECHNOLOGY IN MARINE FIELD

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Abstract: With the use of Li-Fi technology we can transfer data through wireless. Li-fi is a photosensitive wireless technology to provide connectivity within localised area. It helps in faster and more secure data transmission. It is cost effective and less at cost than Wi-Fi. Thousands of data can be transferred at a higher speed. At one corner is the LED and the other corner is the light sensor or photo detector that detects light as soon as the LED starts glowing and gives a binary output o 0 and 1.light can produce data rates faster than 10 megabits per second faster than the average broadband used. Uses visible light communication instead of radio frequency. This paper construes with the use of light radiating diodes Li-Fi technology to transfer data through wireless. . Li-Fi aids the marine technology to endeavor their goals under deep sea since Wi-Fi fails to do that.

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Introduction: Li-fi is transmission of data through illumination by taking the fibre out of fibre optics by sending data through a LED light bulb that varies intensity faster than human eye can follow. German physicist professor Harald Haas coined the term LI-FI and is the founder of this technology in 2011 TED global talks. In Oct 11 few companies and industry groups formed the Li-Fi consortium to promote these high speed optical wireless cables.

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This technology is called light fidelity and is popularly known as li-fi. The general term visible light communication includes any use of the visible light portion of the electromagnetic spectrum to transmit information. Li-Fi is more secure than Wi-Fi with hackers unable to access unsecured internet connections from out of sight of the transmitter.  

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How does Li-Fi work: When the LED is turned on the microchip converts this digital data in the form of light. On the other end this light is detected by photosensitive devices. Next this light is amplified and processed and then fed to the device. The heart of this technology is new generation high brightness LEDs. If Led is on we transmit signal 1 and if the led is off, we transmit signal 0.a controller is connected at the back side of these led bulbs to code data to these LEDs.

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Comparison between Li-I and Wi-Fi:   LI-FI is a term of one used to describe visible light communication technology applied to high speed wireless communication. It acquired this name due to the similarity to WI-FI, only using light instead of radio. Li-Fi is great for general wireless coverage within buildings, and li-fi is ideal for high density wireless data coverage in confined area and for relieving radio interference issues, so the two technologies can be considered complimentary.

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Li-Fi technology in marine: Li-Fi is a new exemplar for photosensitive wireless technology to provide unprecedented connectivity within a localized data centric environment. There has been a complete shift in wireless technology due to increase in demand for faster and more secure data transmission and protected data transmission. Li-Fi is such a free band which is license free that is why it is less at cost than Wi-Fi. With the use of special intonation using a distinctive signal processing technology thousands of streams of data can be transferred simultaneously at higher speed.

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Navy is currently using a slow and antiquated system for underwater communication that does not quite jibe well with the poor acoustics that lie underwater.

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  Radio waves  also do not travel efficiently underwater. For use in petrochemical plants or on airplanes, Li-Fi emissions would be a great option, since Wi-Fi tends to interfere with  onboard electronics . Li-Fi can be advantageous for the submarines in the middle of the ocean where radio waves cannot intrude and with the salutary advantage, Li-Fi paves a way in the sea water, deep into the ocean. Even though

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Similarly the trapped submarines or the submarines caught by the adversary can be rescued relatively fast when compared to the other sources since the data can be sent very fast so that even in few seconds they may ask for aids. submarines have navigators and sensors they need a effective way to transit all the data to the appropriate sources as soon as possible to get their needs. Another pragmatic use of this Li-Fi is that the lost submarines can be found out if they are equipped with the Li-Fi system within a short period since it is effectively fast.

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Advantages: Underwater ROVs, those favourite toys of treasure seekers and James Cameron, operate from large cables that supply their power and allow them to receive signals from their pilots above. ROVs work great, except when the tether isn’t long enough to explore an area, or when it gets stuck on something. If their wires were cut and replaced with light — say from a submerged, high-powered lamp — then they would be much freer to explore. They could also use their headlamps to communicate with each other, processing data autonomously and referring findings periodically back to the surface, all the while obtaining their next batch of orders.

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Conclusion: The possibilities are numerous and can be explored further. If his technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data and we will proceed toward the cleaner, greener, safer and brighter future. The concept of Li-Fi is currently attracting a great deal of interest, not least because it may offer a genuine and very efficient alternative to radio-based wireless. As a growing number of people and their many devices access wireless internet, the airwaves are becoming increasingly clogged, making it more and more difficult to get a reliable, high-speed signal. This may solve issues such as the shortage of radio-frequency bandwidth and also allow internet where traditional radio based wireless.

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Reference: [1]seminarprojects.com/s/seminar-report-on-lifi [2]http://teleinfobd.blogspot.in/2012/01/hat-is-lifi.html.   [3]http://en.wikipedia.org/wiki/Li-Fi.  

The future is here!!! Thank you :

The future is here!!! Thank you

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