Basic Vehicle --> ITS Roadway Equipment:
communications signature

Definition
Included In
Communication Solutions
Characteristics
Security

Definitions

communications signature (Information Flow): Communications from vehicle or personal devices that can be monitored by ITS field equipment to uniquely identify the device. This flow represents communications from devices (via Bluetooth or Wi-Fi) that may be monitored by ITS field equipment or any other passive or active communications from the device that can be used to identify the device. This flow specifically covers passive monitoring of device communications.

Basic Vehicle (Source Physical Object): 'Basic Vehicle' represents a complete operating vehicle. It includes the vehicle platform that interfaces with and hosts ITS electronics and all of the driver convenience and entertainment systems, and other non-ITS electronics on-board the vehicle. Interfaces represent both internal on-board interfaces between ITS equipment and other vehicle systems and other passive and active external interfaces or views of the vehicle that support vehicle/traffic monitoring and management. External interfaces may also represent equipment that is carried into the vehicle (e.g., a smartphone that is brought into the vehicle). Internal interfaces are often implemented through a vehicle databus, which is also included in this object. Note that 'Vehicle' represents the general functions and interfaces that are associated with personal automobiles as well as commercial vehicles, emergency vehicles, transit vehicles, and other specialized vehicles.

ITS Roadway Equipment (Destination Physical Object): 'ITS Roadway Equipment' represents the ITS equipment that is distributed on and along the roadway that monitors and controls traffic and monitors and manages the roadway. This physical object includes traffic detectors, environmental sensors, traffic signals, highway advisory radios, dynamic message signs, CCTV cameras and video image processing systems, grade crossing warning systems, and ramp metering systems. Lane management systems and barrier systems that control access to transportation infrastructure such as roadways, bridges and tunnels are also included. This object also provides environmental monitoring including sensors that measure road conditions, surface weather, and vehicle emissions. Work zone systems including work zone surveillance, traffic control, driver warning, and work crew safety systems are also included.

Included In

This Triple is in the following Service Packages:

TM01: Infrastructure-Based Traffic Surveillance

This triple is associated with the following Functional Objects:

Roadway Passive Monitoring

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

fbv-comm_signature

This Triple has the following triple relationships:

None

Communication Solutions

(Data Not Needed) - Bluetooth (0)

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

Selected Solution

(Data Not Needed) - Bluetooth

Solution Description

This solution is used within Australia, Canada, the E.U. and the U.S.. It combines standards associated with (Data Not Needed) with those for Bluetooth. The (Data Not Needed) standards include an empty set of upper-layer standards. The Bluetooth standards include lower-layer standards that support wireless communications over a personal area network of up to roughly 100 meters.

ITS Application Entity No Standard Needed			Click gap icons for more info.
Mgmt (None)	Facilities No Standard Needed	Security (None)
	TransNet No Standard Needed
	Access Bluetooth

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	Recent
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	Low
Basis	Byproduct flow, does contain PII (Bluetooth MAC addresses for example) but already existant and not required.	While the flow here is a byproduct of existing transmissions, if the data contained within is not reliable then the application using this data will generate erroneous results. Integrity is set MODERATE to emphasize to the application developer that they should verify the flows' integrity, or develop methods to minimize integrity's importance, in which case this could be LOW.	This is a by-product flow; taking advantage of existing wireless emissions to measure travel times for example. If this flow is not present then the application might not function, however, the application is not deploying this flow, it already exists.

Security Characteristics	Value
Authenticable	True
Encrypt	False

Basic Vehicle --> ITS Roadway Equipment:communications signature