Interference control technique through cooperative communication in overlap region according to FOV in indoor visible light communication environment

Abstract

Visible light communication must satisfy both lighting and communication performance. When a large number of lights are present in an indoor environment, interference occurs between adjacent LEDs. Since the area where such interference occurs increases according to the illumination angle of the illumination, an interference control technique according to the interference area is needed. However, existing interference control techniques are insufficient to solve the optical interference problem received from adjacent light sources. Methods/Statistical analysis: In this paper, we study the cooperative communication interference control technique to solve the interference generated by many adjacent light sources in indoor environment and to maintain the illumination performance at the same time. It is also important to consider the performance of the light due to the nature of visible light communication. If the FOV is widened by widening the irradiation angle for the performance of such illumination, the overlapping area between adjacent LEDs becomes wider, resulting in interference and degraded communication performance. To remedy this problem,we propose an interference control technique to decide whether to perform interference cancellation or cooperative communication according to the overlap region according to FOV. Findings: Conventional interference control systems can not properly eliminate interference in the maximum overlapping region. However, the proposed system solves this problem through cooperative communication. Through the proposed system, the interference between adjacent LEDs was solved even at the maximum angle of FOV of the illumination and the performance of the communication system was satisfied. Improvements/Applications: System complexity increases compared to existing systems. Future studies will need to improve this complexity.