Method for calculating the energy loss of a light signal in a telecommunication Li-Fi system

One of the possible ways to increase the bandwidth and quality of service for wireless access systems is the use of Li-Fi (Light Fidelity) technology, where instead of radio frequencies, the VLC (Visible Light Communication) spectrum is used for data transmission. In 2011, the IEEE 802.15.7 standard was adopted, which contains recommendations for the provision of PHY and MAC services for Li-Fi visible light networks in private VPAN networks (VLC Personal Area Networks). The article considers the main recommendations for building devices based on Li-Fi technology, analyzes the processes of information exchange between the receiver and the transmitter at the physical level (PHY), and considers parameters that affect the communication range and methods for determining them. A method is proposed for calculating the energy attenuation of light-emitting diodes in light paths when wireless access is arranged in a standard office room.