Relevant use cases for OBU

4.2 – Relevant use cases for OBU

OBU.02.00 Message Broker Discovery

Need Knowledge of connection information to communication channels for C-ITS services exploitation

Actors • Vehicle’s OBU

Required data • Geographic (list of) coordinates Storyboard

Consider a generic vehicle traveling along a specific path. In C-ITS, long-range communication channels adopt a pub-sub approach. Thus, the vehicle must subscribe to a message broker to receive the messages. However, each message broker is responsible only for a specific geographic area. The OBU asks GMIP for the list of quadkeys used by the path for retrieving the correlated message brokers.

Table 4.3: Message Broker Discovery Use Case Description

OBU.03.00 GNSS Enhancement

Need Knowledge of the vehicle’s current position projected to the nearest road.

Actors • Vehicle’s OBU

Required data • Vehicle position (latest OR history)

• Eventual signal confidence Storyboard

Consider a generic vehicle equipped with a geolocalization sensor traveling in an urban area. The GNSS signal quality may degrade, e.g., approaching so-called «urban canyons», producing inaccurate measurements. The vehicle position must match with a road to avoid misleading reference points. It asks for the projection of the coordinates to the GMIP.

Table 4.4: GNSS Enhancement Use Case Description

OBU.04.00 Event-aware Routing

Need Possibility to change the route according to the events occurring along it.

Actors • Vehicle’s OBU

• C-ITS communication stack Required data • Vehicle position

• Destination position

• Events information Storyboard

Consider a generic means of transport traveling along a specific road route.

Along the way, it could run into slowdowns or even traffic congestion due to the presence of road works, possible accidents, or other reasons. Such events are reported by C-ITS DEN messages. In this case, the vehicle asks the GMIP framework to calculate an alternative route.

Table 4.5: Event-aware Routing Use Case Description

OBU.05.00 Vehicle-related POIs

Need Knowledge of the list of vehicle-related facilities for a given area.

Actors • Vehicle’s sensors

• Vehicle’s OBU Required data • Vehicle position

• POI data Storyboard

Consider a generic means of transport moving on the road. While moni-toring its status, the vehicle detects the need to stop at a waypoint, for example, because it is necessary to refuel. The GMIP receives the request to look for the refueling station, mechanic, and other facilities in the sur-roundings, to prompt the driver for a temporary destination.

Table 4.6: Vehicle-related POIs Use Case Description

4.2 – Relevant use cases for OBU

OBU.06.00 Human-related POIs

Need Knowledge of the list of structures, that can be useful to humans, for a given area.

Actors • Human

• Vehicle’s infotainment

• Vehicle’s OBU Required data • Vehicle position

• POI data Storyboard

Consider a generic road means of transport. The driver could need to reach a specific point of interest, such as a restaurant for taking lunch or a supermarket for shopping. To choose its preferred destination, the human uses an HMI to ask the GMIP framework for shops, restaurants, bars, and other buildings in the surroundings.

Table 4.7: Human-related POIs Use Case Description

OBU.07.00 Road Intersection Knowledge

Need Knowledge of the characteristics of a given road intersec-tion.

Actors • Vehicle’s OBU

• C-ITS communication stack Required data • Geographic coordinate

• Vehicle information Storyboard

Consider a generic means of transport moving on the road. When ap-proaching an intersection, the vehicle may require some information about its topology, e.g., the allowed directions or how many lanes is composed of. In this case, the vehicle asks to GMIP for relevant information, for example, by exploiting C-ITS MAPE messages.

Table 4.8: Road Intersection Knowledge Use Case Description

OBU.08.00 Pedestrian Crossings Knowledge

Need Knowledge of the position of pedestrian crossings for a given road or area.

Actors • Vehicle’s OBU

• C-ITS communication stack Required data • Geographic coordinate Storyboard

Consider a generic means of transport moving on the road. For safety reasons, the vehicle may need some information about the presence of nearby pedestrian crossings. In this case, the vehicle asks to GMIP for relevant information by exploiting maps provider knowledge or, nearby intersections, C-ITS MAPE messages

Table 4.9: Pedestrian Crossings Knowledge Use Case Description

OBU.09.00 Cycling Lanes Knowledge

Need Knowledge of the presence of any cycling lane and its characteristics for a specific road.

Actors • Vehicle’s OBU

• C-ITS communication stack Required data • Geographic coordinate

• Vehicle information Storyboard

Consider a generic means of transport moving on the road. For safety reasons, the vehicle may need some information about the presence of nearby cycling lanes. In this case, the vehicle asks to GMIP for relevant information by exploiting maps provider knowledge or, nearby intersections, C-ITS MAPE messages.

Table 4.10: Cycling Lanes Knowledge Use Case Description

4.2 – Relevant use cases for OBU

OBU.10.00 Road Lanes Knowledge

Need Knowledge of the number and topology of lanes for a specific road.

Actors • Vehicle’s OBU

• C-ITS communication stack Required data • Geographic coordinate

• Vehicle information Storyboard

Consider a generic means of transport moving on the road. The vehicle may require some information about the lanes’ composition, e.g., their number, position, and allowed maneuvers. In this case, the vehicle asks to GMIP for relevant information by exploiting maps provider knowledge or, nearby intersections, C-ITS MAPE messages.

Table 4.11: Road Lanes Knowledge Use Case Description

OBU.11.00 Road Surface Knowledge

Need Knowledge of the road surface type and its conditions along a specific path.

Actors • Vehicle’s OBU

Required data • Geographic coordinate

• Vehicle information Storyboard

Consider a generic means of transport traveling along a specific path. The vehicle may need information about road surface type and quality, e.g., to avoid specific road sections that could be difficult to go through. In this case, the vehicle asks to GMIP for relevant information to exploit.

Table 4.12: Road Surface Knowledge Use Case Description

OBU.12.00 Road Signage Knowledge

Need Knowledge of the road signage that must be observed by a specific vehicle along a specific path.

Actors • Vehicle’s OBU

• C-ITS communication stack Required data • Geographic coordinate

• Vehicle information Storyboard

Consider a generic means of transport traveling along a specific path. The vehicle may need information about prescriptions, warnings, or directions to follow, e.g., the limitations of the vehicle’s speed on the road. This knowledge is provided by map providers and C-ITS IVI messages. In this case, the vehicle asks to GMIP for relevant information.

Table 4.13: Road Signage Knowledge Use Case Description

OBU.13.00 Road Vehicle Limits Knowledge

Need Knowledge of the types of vehicles that can travel along a specific path.

Actors • Vehicle’s OBU

Required data • Geographic coordinate

• Vehicle information Storyboard

Consider a generic means of transport traveling along a specific path. The vehicle may need some information about the presence of limitations of vehicle categories or characteristics on the road. In this case, the vehicle asks to GMIP for relevant information to be exploited.

Table 4.14: Road Vehicle Limits Knowledge Use Case Description