Li-Fi Technology Beyond The Expectations

Hey Webber

After a Long time i'm writing, but its said that never wait to do something new. This time we are going to look on a best technology called Li-Fi. It is Light Fidelity a way of transmitting data at large speed towards Smartphones, laptops and PCs.When the heading stuck into the mind it look like the Wi-Fi. The question will arise into your minds thats Is it Like Wi-Fi or something different ?
Don't worry I'm here to tell you to get deep understanding of this subject we have to through different following steps.
Lets Start

Wi-Fi Limitations

Capacity: Wireless data is transmitted through radio waves which are limited and expensive. It has a limited bandwidth. With the rapidly growing world and development of technologies like 3G, 4G and so on we are running out of spectrum.
Efficiency: There are 1.4 million cellular radio base stations that consume massive amount of energy. Most of the energy is used for cooling down the base station instead of transmission. Therefore efficiency of such base stations is only 5%.
Availability: Availability of radio waves is a big concern. It is not advisable to use mobile phones in aero planes and at places like petrochemical plants and petrol pumps. 
 Security: Radio waves can penetrate through walls. They can be intercepted. If someone has knowledge and bad intentions, they may misuse it. This causes a major security concern for Wi-Fi.

        What is Li-Fi Technology ?
        
        Li-Fi stands for Light-Fidelity. Li-Fi is transmission of data through illumination by taking the fiber out of fiber optics by sending data through an LED light bulb  that varies in intensity faster than the human eye can follow. Li-Fi is the term some have used to label the fast and cheap wireless communication system.
         Li-Fi uses visible light instead of Gigahertz radio waves for data transfer.It offers much larger frequency band (300 THz) ,RF communications is (300GHz).


         Li-Fi can be the technology for the future where data for laptops, smart phones, and tablets will be transmitted through the light in a room. Security would not be an issue because if you can‘t see the light, you can‘t access the data.



         The idea of Li-Fi was introduced by a German physicist,Harald Hass.Li-Fi is a fast and cheap optical version of Wi-Fi. It is based on Visible Light Communication (VLC) VLC is a data communication medium, which uses visible light between 400THz (780 nm) and 800 THz (375 nm) as optical carrier for data transmission.
                                    
                                                


 The main components of Li-Fi system are as follows:
                 A) A high brightness white LED which acts as a transmission source.
                 B) A silicon photodiode with good response to visible light as the receiving element.
LEDs can be switched on and off to generate digital strings of different combination of 1s and 0s. To generate a new data stream, data can be encoded in the light by varying the flickering rate of the LED.The LEDs can be used as a sender or source for Parallel data transmission.

        Wi-Fi – IEEE 802.11n Speed is 150 Mbps.Bluetooth Speed is 3 Mbps.IrDA 4 Speed is Mbps.
          Li-Fi Speed is More than1 Gbps .

                

         Advantages
         
         Capacity: Light has 10000 times wider bandwidth than radio waves.
       Efficiency: Data transmission using Li-Fi is very cheap. LED lights consume less energy and are highly efficient.
         Availability: Availability is not an issue as light sources are present everywhere.
         Security: Light waves do not penetrate through walls. So, they can‘t be intercepted and misused.
       
          Applications
        
         Education systems :Class Rooms
         Medical Applications : OPD’s
         Cheaper Internet in Aircrafts and Trains
         Underwater applications
         Applications in sensitive areas : Power plants
         In cars
         At Homes and many more

         Thank You
         Stay Tuned To Webious For More.
         

Onkar

He's a webious author and a teck freak who likes to try out newest technologies and share about it to the world. Share his article and it will buy him a coffee, his life liquid.

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