I. Introduction
The On-Board Units (OBUs) embedded in the vehicles are suffering an evolution during the last years, from being designed for a specific purpose and with dedicated hardware, to white box networking and computing nodes capable of doing multiple kinds of tasks and interconnecting all the actors involved in the Connected and Automated Mobility (CAM) vertical. These OBUs's main objective is to gather all the sensor-data collected by the vehicle and make it accessible to the infrastructure or other vehicles.