Network Time Source --> Connected Vehicle Roadside Equipment:
time

Definitions

time (Information Flow): Current time expressed in Universal Time Coordinated (UTC) format from a Stratum-2 time server.

Network Time Source (Source Physical Object): The 'Network Time Source' represents the external time source the Connected Vehicle Service Monitor System uses as the basis for time. This is likely implemented as a Stratum-2 Network Time Server that is 2 steps removed from a basic time source (e.g., atomic clock).

Connected Vehicle Roadside Equipment (Destination Physical Object): 'Connected Vehicle Roadside Equipment' (CV RSE) represents the Connected Vehicle roadside devices (i.e., Roadside Units (RSUs)) equipped with short range wireless (SRW) communications technology, as well as any other supporting equipment that leverage the RSU and are not described by other objects (e.g., a local roadside processor). CVRSE are used to send messages to, and receive messages from, nearby vehicles and personal devices equipped with compatible communications technology. 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:

• SU05: Location and Time

This triple is associated with the following Functional Objects:

• RSE Support Services

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

• fnts-external_source_time

This Triple has the following triple relationships:

Communication Solutions

• NTP - UDP/IP (3)

Selected Solution

NTP - UDP/IP

Solution Description

ITS Application Entity No Standard Needed			Click gap icons for more info.
Mgmt Bundle: NTP Bundle: SNMPv3 MIB	Facilities No Standard Needed	Security (None)
	TransNet IETF RFC 768 IP Alternatives
	Access Internet Subnet Alternatives

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

Security