Physical Layer Security of 6G Vehicle Visible Light Communications for Cyber-physical Systems
Jupeng Ding, I Chih‐Lin, Jintao Wang, Hui Yang · River Publishers eBooks · 2025
As one complementary approach to the well-discussed radio frequency (RF) technology in 6G vehicular-to-vehicular communications (V2V) and 6G Internet of vehicles (IoV), light emitting diodes (LED)-based emerging vehicular visible light communication (VLC) is gaining the unprecedented focus and investigation, main thanks to the abundant optical spectrum resource, the high directivity, and the immunity to conventional electromagnetic interference of the utilized lightwave signal. Due to the broadcasting propagation nature of vehicle VLC signals, it is essential to improve the security performance metrics of the edge-cutting vehicle VLC, especially from the view of the physical layer. Numerous physical layer security (PLS) designs and schemes have been proposed to enhance security performance of vehicular 132 VLC. However, these works are limited to the studies of the emerging secure vehicular VLC with traditional Lambertian light beam configurations, which objectively cannot characterize the PLS performance of emerging vehicular VLC scenarios with emerging and distinctive non-Lambertian light beam patterns. To address this challenge, in this chapter, one typical secure vehicular VLC deploying representative non-Lambertian light beams is envisioned and comparatively studied from the view of PLS. Numerical results demonstrate that, for this typical V2V VLC scenario of stop mode, compared with 5.27 bps/Hz secrecy capacity of the vehicular VLC with benchmark Lambertian configuration, the effect of the non-Lambertian light beams could be up to about 2.66 bps/Hz for the PLS performance gain of the 6G IoV-oriented typical inter-vehicle VLC application.