LiFi: high-speed internet through light
LiFi is an innovation designed to improve communication between communication devices. It’s an alternative that overcomes the limitations of Wi-Fi. From its definition to its benefits, this article highlights all the fundamentals of this system of the future.
Definition and mode of operation of LiFi
LiFi is a wireless communication system that uses visible light. Unlike Wi-Fi, which is powered by the electromagnetic spectrum, LiFi uses the optical spectrum. It works by encoding and transmitting data through the transformation of the amplitude of light sources according to the protocol.
Furthermore, by using an LED bulb several times, information is transferred by randomly creating a binary code. The extremely rapid changes in sequences allow all types of information to be sent at a speed higher than that of Wi-Fi. So don’t hesitate to adopt LiFi technology: the internet by light.
The various advantages of LiFi
Light Fidelity is a technology with multiple benefits. These include:
- From the multiplication of access points;
- From the reduction of expenses;
- Strengthening security;
- A connection with a more stable and high flow rate.
LED bulbs are widely used by many households and individuals these days, which contributes to the multiplication of potential access points. As for reducing costs, it is possible to fairly distribute installation costs and optimize lighting operation. Regarding the security system, the light waves used as the basis for LiFi cannot go beyond your private space. Therefore, the risk of hacking is almost impossible.
Finally, LiFi is much faster than Wi-Fi. In this sense, Oledcomm presented it in early 2020 as a solution capable of reaching a speed of 1 Gb/s. However, its device requires the user to remain near a working light source. In addition, its diffusion is very limited, and interference with other light sources, such as sunlight, can hinder its operation.
The first experiences of LiFi
Since its launch, LiFi has attracted many individuals and communities. In France, it has been installed in numerous sectors. As part of a temporary exhibition in 2015, anyone wishing to visit the French Playing Card Museum could access the visitor guide via a tablet equipped with a LiFi key. Furthermore, train stations are equipped with illuminated GPS devices.
In addition to these initial uses, Oledcomm and Air France joined forces in November 2019 to launch the project to install LiFi in aircraft, enabling passengers to enjoy a good connection during their flight.
LiFi and the 5G network
LiFi technology and 5G networks can complement each other. In Germany, companies such as Vodafone and Signify have taken the initiative to combine the power of 5G with LiFi to provide a secure high-speed connection. Huawei has also presented a project to complement 5G with LiFi, specifically in the healthcare sector.
