This chapter is devoted to discussing the integration of intelligent reflecting surfaces (IRSs), or intelligent walls, in optical wireless communication (OWC) systems. IRS technology is a revolutionary concept that enables communication systems to harness the surrounding environment to control the propagation of light signals. Based on this, specific key performance indicators could be achieved by altering the electromagnetic response of the IRSs. In the following, we discuss the background theory and applications of IRSs and present a case study for an IRS-assisted indoor light-fidelity (LiFi) system. We then highlight some of the challenges related to this emerging concept and elaborate on future research directions.

翻译：本章致力于探讨智能反射面（IRS），或称智能墙，在光无线通信（OWC）系统中的集成。IRS技术是一种革命性概念，使通信系统能够利用周围环境来控制光信号的传播。基于此，通过改变IRS的电磁响应，可以实现特定的关键性能指标。接下来，我们将讨论IRS的背景理论及应用，并介绍一个IRS辅助的室内光保真（LiFi）系统案例研究。最后，我们重点阐述这一新兴概念所面临的一些挑战，并展望未来的研究方向。