Emergency Vehicle OBE --> Connected Vehicle Roadside Equipment:
vehicle location and motion

Definition
Included In
Communication Solutions
Characteristics
Security

Definitions

vehicle location and motion (Information Flow): Data describing the vehicle's location in three dimensions, heading, speed, acceleration, braking status, and size.

Emergency Vehicle OBE (Source Physical Object): The Emergency Vehicle On-Board Equipment (OBE) resides in an emergency vehicle and provides the processing, storage, and communications functions that support public safety-related connected vehicle applications. It represents a range of vehicles including those operated by police, fire, and emergency medical services. In addition, it represents other incident response vehicles including towing and recovery vehicles and freeway service patrols. It includes two-way communications to support coordinated response to emergencies. A separate 'Vehicle OBE' physical object supports the general vehicle safety and driver information capabilities that apply to all vehicles, including emergency vehicles. The Emergency Vehicle OBE supplements these general capabilities with capabilities that are specific to emergency vehicles.

Connected Vehicle Roadside Equipment (Destination Physical Object): 'Connected Vehicle Roadside Equipment' (CV RSE) represents the Connected Vehicle roadside devices that are used to send messages to, and receive messages from, nearby vehicles using Dedicated Short Range Communications (DSRC) or other alternative wireless communications technologies. Communications with adjacent field equipment and back office centers that monitor and control the RSE are also supported. This device operates from a fixed position and may be permanently deployed or a portable device that is located temporarily in the vicinity of a traffic incident, road construction, or a special event. It includes a processor, data storage, and communications capabilities that support secure communications with passing vehicles, other field equipment, and centers.

Included In

This Triple is in the following Service Packages:

PS03: Emergency Vehicle Preemption

This Triple is described by the following Functional View Functional Objects:

This Triple is described by the following Functional View Data Flows:

This Triple has the following triple relationships:

None

Communication Solutions

EU: CA Service - BTP/GeoNetworking/G5 (13)
US: SAE LTE-V2X BSM - LTE-V2X WSMP (16)
US: SAE Basic Safety Messages - WAVE WSMP (18)

Solutions are sorted in ascending Gap Severity order. The Gap Severity is the parenthetical number at the end of the solution.

Selected Solution

US: SAE Basic Safety Messages - WAVE WSMP

Solution Description

This solution is used within the U.S.. It combines standards associated with US: SAE Basic Safety Messages with those for V-X: WAVE WSMP. The US: SAE Basic Safety Messages standards include upper-layer standards required to implement V2V safety information flows. The V-X: WAVE WSMP standards include lower-layer standards that support connectionless, near constant, ultra-low latency vehicle-to-any communications within ~300m using the WAVE Short Messaging Protocol (WSMP) over IEEE WAVE in the 5.9GHz spectrum. The broadcast mode is interoperable with M5 FNTP.

ITS Application Entity SAE J2735 SAE J2945/1			Click gap icons for more info.
Mgmt Addressed Elsewhere	Facilities SAE J2735 SAE J2945	Security Bundle: IEEE 1609.2
	TransNet IEEE 1609.3
	Access Bundle: WAVE - Subnet

Note that some layers might have alternatives, in which case all of the gap icons associated with every alternative may be shown on the diagram, but the solution severity calculations (and resulting ordering of solutions) includes only the issues associated with the default (i.e., best, least severe) alternative.

Characteristics

Characteristic	Value
Time Context	Now
Spatial Context	Adjacent
Acknowledgement	False
Cardinality	Broadcast
Initiator	Source
Authenticable	True
Encrypt	False

Interoperability	Description
National	This triple should be implemented consistently within the geopolitical region through which movement is essentially free (e.g., the United States, the European Union).

Security

Information Flow Security
	Confidentiality	Integrity	Availability
Rating	Not Applicable	Moderate	Moderate
Basis	This data is intentionally transmitted to everyone via a broadcast. Much of its information content can also be determined via other visual indicators	Incorrect information could lead to the system not operating properly. If the system does not properly know where the emergency vehicle is coming from and where it is heading, the system could incorrectly route traffic in an attempt to speed up the emergency vehicle. If it is making logic decisions based on incorrect data, this could prevent the emergency vehicle from navigating through the intersection quickly.	This data is required for the Emergency Vehicle Preemption to operate properly. If this data is not available, the emergency vehicle may not be able to travel through the intersection quickly enough. If an emergency vehicle is not able to get through the intersection quickly enough, it could prevent them from responding to the emergency in a timely manner. As discussed above, the difference between success and failure of this application is not catastrophic, but it is significant, so a moderate availability rating seems appropriate.

Security Characteristics	Value
Authenticable	True
Encrypt	False

Emergency Vehicle OBE --> Connected Vehicle Roadside Equipment:vehicle location and motion