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LiFi technology

LiFi technology

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Li-Fi (Light Fidelity) is a Wireless communication Technology, which utilizes light to transmit data and position between devices.

Li-Fi is a light communication system that is capable of transmitting data at high speeds over the visible light, ultraviolet, and infrared spectrums.

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With Li-Fi, your light blub is essentially your router. It uses common household LED light bulbs to enable data transfer, For instance in a room with 6 LiFi integrated lights, each light transmits 42 Mbps leading to a total capacity of 252 Mbps in that room. This results in a reliable and faster user experience.

The term was first introduced by Harald Haas during a 2011 TEDGlobal talk in Edinburgh.

LiFi Logo

How does LiFi Works

Li-Fi and Wi-Fi are quite similar as both transmit data electromagnetically. However, Wi-Fi uses radio waves, while Li-Fi runs on visible light waves.
As we now know, Li-Fi is a Visible Light Communications (VLC) system. This means that it accommodates a photo-detector to receive light signals and a signal processing element to convert the data into ‘streamable’ content.

An LED (Light Emitting Diodes) light bulb is a semiconductor light source meaning that the constant current of electricity supplied to an LED light bulb can be dipped and dimmed, up and down at extremely high speeds, without being visible to the human eye.
For Instance, data is fed into an LED light bulb (with signal processing technology), it then sends data (embedded in its beam) at rapid speeds to the photo-detector (photodiode).

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The tiny changes in the rapid dimming of LED bulbs are then converted by the ‘receiver’ into electrical signal.
The signal is then converted back into a binary data stream that we would recognise as web, video and audio applications that run on internet-enabled devices.

Application of LiFi Technology

  • Smart Home
    LiFi in Home will enable simple, secure, reliable and robust wireless communications. Similar to the enterprise environment LiFi can offer data aggregation and wireless offloading.
  • Enterprise Wireless Solutions
    LiFi net works for daily work, Conference streaming, remote desktops along with video, can provide an enhanced user experience with the confidence of robust security.
  • Virtual & Augmented Reality
    LiFi Offers Faster Speed, lower latency and interference-free wireless communications that helps overcome technology challenges allowing VR and AR products to become wire free and reliable.
  • Autonomous Transport
    Due to the high speed, low latency characteristics of LiFi and the ubiquitous nature of LED lights in our transport infrastructure. LiFi is an ideal technology to complement and augment current wireless technologies used for autonomous transport and cars.
  • Industry 4.0
    LiFi can enable reliable real-time monitoring without adding to interference management issues with RF in industrial 4.0 environments.

Benefits of LiFi

  • Speed & Bandwidth
    LiFi can deliver multiple Gbps speeds in mobile devices.  This next generation technology will drive wireless beyond any current capability, opening up unprecedented bandwidth
  • Reliability
    LiFi provides enhanced reliability enabling interference-free communications and  1000 times the data density, dramatically improving the user experience.
  • Low Latency
    LiFi currently offers latency by a factor of three times lower than Wi-Fi and can radically enable innovation, automation, and applications such as AR and VR.
  • Security
    In contrast to radio frequency waves used by Wi-Fi, lights cannot penetrate through walls and doors. This makes it more secure and makes it easier to control access to a network. As long as transparent materials like windows are covered, access to a Li-Fi channel is limited to devices inside the room
  • Interference Free
    RF is vulnerable to interference from a wide range of devices such as cordless phones, microwaves and neighbouring Wi-Fi networks. LiFi signals can be defined by the area of illumination, which means interference is much simpler to avoid and even stop altogether. This also means LiFi can be used in RF hostile zones such as hospitals, power plants and aeroplanes.

Present Companies on LiFi Technology

  • The pureLiFi, which is a UK based company, claims to be one of the leading companies in LiFi technology.
  • OLEDCOMM, a French company, designs and manufactures Li-Fi router solutions for LED based lighting systems. The OLEDCOMM claims to be a world leader in the field offering the following products /services based on its Li-Fi LED drivers.

Future Scope:

As light is everywhere and free to use, there is a great scope for the use and evolution of LiFi technology. If this technology becomes mature, each Li-Fi bulb can be used to transmit wireless data. As the Li-Fi technology becomes popular, it will lead to a cleaner, greener, safer communications and have a bright future and environment. The concept of Li-Fi is deriving many people as it is free (require no license) and faster means of data transfer. If it evolves faster, people will use this technology more.

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