With the development of technology in the 21st century, data transmission has become a key element of global development. Currently, Wi-Fi, the main method of wireless data transmission, is widely used in homes, offices and public places. However, such requirements as increasing data transmission speed, improving security and reducing energy consumption require new solutions. One of such promising areas is Li-Fi (Light Fidelity) technology, which provides information transmission through light.
What is Li-Fi?
Li-Fi is a data transmission technology that uses electromagnetic waves in the visible, ultraviolet, or infrared range. While Wi-Fi works using radio waves, Li-Fi transmits data using light-emitting diodes (LEDs). These diodes blink so quickly that they are invisible to the human eye. These microscopic changes in light are interpreted by the receiver as digital information.
The basic principle of Li-Fi is based on light modulation. LEDs flash at a high frequency, allowing binary data (0 and 1) to be transmitted. The signal is converted using photodetectors, which receive light pulses and convert them into an electrical signal.
Benefits of Li-Fi
1. High Data Transfer Rates – Li-Fi can reach speeds of up to 224 Gbps. This makes the technology ideal for high-bandwidth applications such as 4K/8K video streaming, virtual reality, and cloud computing.
2. High Security – Since light waves do not travel through a wall, the Li-Fi signal cannot be detected outside the building. This makes the technology attractive for use in high-security locations such as banking institutions or military installations.
3. No RF Interference – Li-Fi does not use radio waves, so it does not interfere with devices such as medical equipment or aviation communication systems.
4. Energy Saving – Li-Fi uses LEDs, which are already used for lighting. It combines lighting and data transmission functions, reducing overall energy consumption.
5. Wide Range of Applications – By using visible light, Li-Fi can be integrated into existing lighting systems, making it a versatile technology.
Li-Fi Application Areas
1. Offices and Commercial Buildings - Li-Fi can be used in offices to provide high-speed internet connectivity, complementing or replacing existing Wi-Fi networks.
2. Healthcare - Radio interference in hospitals and clinics can affect medical equipment.
Li-Fi provides data transmission as a secure alternative.
3. Automotive - Li-Fi can be used to exchange data between vehicles or between vehicles and road infrastructure. This helps develop autonomous driving systems.
4. Education - In educational institutions, Li-Fi provides reliable and secure access to data, reducing the risk of data leakage.
Comparison of Wi-Fi and Li-Fi technologies
Li-Fi Standards
Li-Fi technology is gradually becoming standardized, which ensures its integration into the existing communications infrastructure.
1. IEEE 802.11bb In July 2023, the IEEE 802.11bb standard was adopted, which defines the use of Li-Fi as a wireless communication technology. This standard integrates Li-Fi into the Wi-Fi ecosystem, allowing Li-Fi to work as a complement to existing networks.
2. ITU G.vlc The International Telecommunication Union (ITU) is developing the G.vlc standard aimed at unifying approaches to using Li-Fi to transmit data via light.
Standards such as IEEE 802.11bb open up the possibility of hybrid systems that combine Li-Fi and Wi-Fi, providing seamless switching between the two technologies depending on signal conditions.
H.A. Israilov, 2nd category network
engineer of SEMS in Jizzakh region
