Service Monitor System --> Center:
time local form

Definitions

time local form (Information Flow): Time local form includes UTC time synchronized with the external source in a format usable by connected vehicle center functions.

Service Monitor System (Source Physical Object): The 'Service Monitor System' represents one or more center-based systems that provide monitoring, management and control services necessary to other applications and/or devices operating within the Connected Vehicle Environment. These support services enable other applications to provide transportation services.

Center (Destination Physical Object): This general physical object is used to model core capabilities that are common to any center.

Included In

This Triple is in the following Service Packages:

This triple is associated with the following Functional Objects:

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

This Triple has the following triple relationships:

None

Communication Solutions

  • NTP - UDP/IP (3)
Solutions are sorted in ascending Gap Severity order. The Gap Severity is the parenthetical number at the end of the solution.

Selected Solution

NTP - UDP/IP

Solution Description

This solution is used within Australia, Canada, the E.U. and the U.S.. It combines standards associated with NTP with those for I-I: UDP/IP. The NTP standards include standards required to reliably set time information in a subsystem. The I-I: UDP/IP standards include lower-layer standards that support the Network Time Protocol that allows NTP servers to provide time synchronization services to other NTP servers and clients.

ITS Application Entity

No Standard Needed
Click gap icons for more info.
Mgmt
Facilities

No Standard Needed
Security
Mind the gap

(None)
TransNet

IETF RFC 768
IP Alternatives
Access

Internet Subnet Alternatives
TransNet TransNet

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Mgmt Mgmt

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Facility Facility

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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 Regional
Acknowledgement True
Cardinality Unicast
Initiator Destination
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 High Moderate
Basis Time reference is intended to be univerally available. Time must be highly coordinated for some applications. This support function must meet the highest requirement. Time coordination must always be in place, but local mechanisms for tracking time should suffice to avoid catastrophic failures for known use cases, thus MODERATE.


Security Characteristics Value
Authenticable True
Encrypt False