TETRIS: Smartphone-to-Smartphone Screen-Based Visible Light Communication

With the extensive use of smartphones, technology improving secure communication between smartphones is a growing field of research. As a form of Visible Light Communication, a color video barcode system creates a smartphone-tosmartphone communication channel. This color video barcode system, effectively an evolved form of QR codes, provides a secure alternative to WiFi, Bluetooth, and Near Field Communication. Recent improvements in smartphone screen resolution and camera capabilities allow for data transmission with larger amounts of information. In this paper, we investigate if these hardware changes will allow for improvements in data transmission over a screen-to-camera color barcode link. Our system, TEtra- TRansmISsion (TETRIS) achieves a communication throughput of 311.22 Kbps with 90% accuracy. We discuss how this could be improved with further work.