Li-Fi Technology

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Presentation Description

Li-Fi, as coined by Prof. Harald Haas during his TED Global talk, is bidirectional, high speed and fully networked wireless communications, like Wi-Fi, using light. 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.

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Presentation Transcript

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Light Fidelity The Future Technology In Wireless Communication Nisha Sharma

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TM The Mobile Revolution

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TM PRESENT SCENARIO 1.4 Million 5 Billion This year,for the first time,there will be more mobile phones on the earth than there are people. …by 2018,sending the equivalent of 1.8 million years of HD video every month. By 2020… 1000 wireless devices per person. AND Available spectrum will run out.

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TM

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TM What is Li – Fi ? LI-FI is transmission of data through illumination, sending data through a LED light bulb.

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TM Prof. Harald Hass,Developer of Li-Fi

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TM Principles Of Li - Fi

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TM 01010001011101010 01010001011101010 11101010100010101 10100001010111010 11101010100010101 01010001011101010

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TM What is LED ? (Light Emitting Diode) Semiconductor Light Source p-n junction diode which emits light Includes electroluminescence Electron recombines with holes when voltages are provided , releasing energy in the form of photons

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TM LED (Light Emitting Diode) Mirrored cup p-type n-type p-type n-type energy

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TM Why only LED ? NOT Consistent Light bulbs ?

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TM How Li - Fi Works ?

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TM LED on LED off 1 0 1 1 0 1 0 1

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TM

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TM

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TM Li - Fi Environment

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TM Why do we need Li – Fi ?

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TM 10 0 10 3 10 4 10 8 10 9 10 11 10 12 10 14 10 15 10 16 10 17 10 19 10 20 10 24 Long Radio Waves Radio Waves Microwaves Infra red Ultra violet X-rays Gamma rays Visible Electromagnetic Spectrum 10,000

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TM Issues Regarding Electromagnetic Spectrum Capacity Availability Efficiency Security

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TM Difference between Li-Fi AND Wi-Fi Wi - Fi Li - Fi Speed

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TM Difference between Li-Fi AND Wi-Fi Wi - Fi Li - Fi Medium for Data Transmission

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TM Difference between Li-Fi AND Wi-Fi Wi - Fi Li - Fi Capacity

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TM Difference between Li-Fi AND Wi-Fi Wi - Fi Li - Fi Efficiency

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TM Difference between Li-Fi AND Wi-Fi Wi - Fi Li - Fi Availability

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TM Difference between Li-Fi AND Wi-Fi Wi - Fi Li - Fi Security

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TM Five points need to know about Li-Fi There is NO visible flicker. Lights can be dimmed and still transmit. Sunlight causes no interference . Li-Fi uses power efficiently . It does not need to be Line-Of-Sight to work.

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TM Applications OF Li – Fi

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TM In Street Lights

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TM In Transport System

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TM In Aircraft

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TM Underwater

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TM In Power Plants

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TM Internet Of Things

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TM Potential Scenario of Li- Fi

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TM

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