# Experimental Measurements of a Joint 5G-VLC Communication for Future Vehicular Networks
## 3 5G Field Trials
### Use Cases  
The project aims to validate the 5G and its role of new digital economy creators. In fact, 5G is does not provide only the enhancement of current wireless systems, but it also represents a framework where new services and applications will be provided. Consequently, 5G can support a different vertical market that need of a wide range of services each one characterized by specific requirements [19]. In this context, the project defines several use cases to test the provisioning on the 5G network of innovative services that are under deployment. A brief description is provided in Table 1, while the use case on smart mobility is detailed in the next section. More details on the overall 5G test-bed can be found in [12]. \begin{table}
\begin{tabular}{c c} \hline \hline
**Use Case** & **Description** \\ \hline e-Health & A platform that provides personalized care and assistance with guaranteed quality of service and continuity for telemedicine, telemonitoring and analysis of behavioural habits. \\ \hline Smart industry & A digital platform to provide Industry 4.0 services for the optimization of production processes, energy efficiency, maintenance and operation. \\ \hline Smart grid & A management architecture inspired by blockchain protocol enabling new services and management methods of the load and generation assets. \\ \hline IoT and sensors & Connected sensors (following the IoT paradigm) for real-time remote control of the industrial processes, heavy machinery in hazardous environments, logistics optimization \\ \hline Structural health monitoring & A monitoring service for buildings/infrastructures, reporting any anomaly of the most significant structural parameters even in emergency (e.g., earthquake) by means the use of sensors and drones. \\ \hline Virtual reality for cultural heritage & An immersive virtual visit of different type of cultural heritage with digital contents delivery by using the virtual reality and the augmented reality. \\ \hline Agriculture 2.0 & Support and improvement of the _Male in Italy_ brand. Tracking of products and production processes in the Agro-Food sector. \\ \hline \hline \end{tabular}
\end{table} 
Table 1: 5G project Use Cases. This section focuses on smart mobility use case that is the one for which we present the testbed and experimental results. It is a widely shared policy perspective that smart mobility will address numerous social challenges about freight and passenger transport: safety, efficiency, energy saving, reliability, etc. In this context, 5G is envisaged as the ultimate technology for smart mobility, since features of cellular-vehicle-to-everything (C-V2X) will be included as part of the cellular chipsets embedded into vehicles for their vehicle-to-network (V2N) communications. The vertical domain of smart mobility is therefore one of the primary driving sectors for progression towards 5G, and one of the most important use cases in the 5G project. The smart mobility platform has two main goals:  
1. Road monitoring: electric parking and charging points are being deployed for the purpose of monitoring the state of the road surface (presence of gaps, slope, traffic conditions, etc.) during regular everyday activities by installing in the vehicles a blackbox containing a 5G module for real-time transmission of information to a data processing center. Electric cars are equipped with a differential GPS that can map the geographic positions of the holes found during regular vehicle use with a precision of cm. 2. Advanced viability: vehicles share data with other vehicles and with a control center where data traffic information is smartly combined other information such as the city's temperature, the road status and other sensors information. The goal is to use real-time information for increasing car and driver health, comfort, and style of driving and for minimizing road traffic, congestion, and consequent emissions. The Smart Mobility platform is based on some key technologies:
3.