The technology Li-FiAbbreviation of “Light Fidelity” or “Light Fidelity”is an innovative form of wireless connection that uses light to transmit data. Unlike conventional Wi-Fi, which uses radio frequency waves, Li-Fi harnesses the properties of visible, ultraviolet, and infrared light for communication.
The term Li-Fi was coined by Harald Haas during a talk at TEDGlobal in 2011. Work has been going on developing and refining this technology ever since. However, as he explains hardzoneits implementation has been slow due to technical challenges, especially in terms of transfer speeds and network security.
How is it different from Wi-Fi?
The main difference between Li-Fi and WiFi lies in the method of data transmission. While WiFi uses radio frequency to induce an electrical voltage in a receiving antenna, Li-Fi modulates light intensity to transmit information. This implies that the Li-Fi connection is established through LED bulbs, since they can precisely control the intensity of the light.
One of the potential advantages of Li-Fi is its ability to be used in areas sensitive to electromagnetic interference, such as airplane cabins and hospitals. Additionally, its use of visible light allows for greater security, as the signal cannot pass through walls, making it more difficult to intercept.
However, Li-Fi also presents some challenges. For example, the LED bulb must be on to function properly, limiting its use to situations where lighting is required. In addition, the Li-Fi signal is affected by obstacles and is reduced when leaving the cone of light emitted by the light source. This means that transmitters would be needed in every room to ensure a reliable connection.
Recently, the Institute of Electrical and Electronics Engineers (IEEE) announced the IEEE 802.11bb standard for light-based wireless communications. This standard will help companies accelerate the development and adoption of Li-Fi solutions, and is expected to promote interoperability and security in this emerging technology.
While Li-Fi shows great potential, it’s important to note that it won’t completely replace WiFi and 5G anytime soon, as radio waves still have significant advantages in terms of range and ability to pass through opaque objects. However, Li-Fi can be an optimal solution in areas with high congestion, such as shopping malls, where multiple light points can be used to create an efficient data transmission network.