Visible Light Two-Way Communication Method for Vehicle-Road Collaboration

With the increasing placement of sensor nodes on vehicles and Internet of Vehicles equipment, the need for online debugging of sensor nodes has grown significantly. However, current methods for online debugging of sensors heavily rely on the existing network infrastructure. In the event of communication infrastructure failure, retrieving and repairing transmission information becomes nearly impossible. In our research, we’ve employed the optical modules that accompany sensor nodes to establish a hybrid communication debugging system based on visible light communication (VLC). To enhance the efficiency of debugging information uploads, this article organizes and optimizes the original data, utilizing the Snappy compression algorithm to minimize empty time slots and achieve data compression during source encoding, thereby saving time. In addition, to bolster the reliability of data uploads, we’ve developed a frame synchronization mechanism tailored for the optical camera at the receiving end of the uplink. By employing the Transformer algorithm for frame header position prediction, we’ve improved the reliability of data collection.