Novel user allocation scheme for full duplex multiuser bidirectional Li-Fi network

Abstract A novel user allocation scheme for a full duplex multi-user bidirectional Li-Fi system is proposed. The users are allocated into separate color clusters and the user data is transmitted through the allocated color beams from the RGB (red, green, and blue) light emitting diodes (LEDs) in the form of predefined frame structure. At the receiving end, primary user separation is achieved by a color sensor that is capable of distinguishing the colors. Similarly, for uplink data transmission, the modulation of the user data is performed using a different color from the one used to retrieve the data and transmitted through the RGB LED, resulting in a bidirectional VLC link with minimal interference. Simulations demonstrate that the proposed user allocation scheme is efficient and robust with significant performance in the bidirectional Li-Fi system.