Physical Object: Field
Field Time Management
Overview
'Field Time Management' provides foundational time keeping functionality that supports an accurate, synchronized time reference in ITS field equipment. It receives accurate time information from an external source and maintains a local time reference using an internal clock in between time synchronizations.
This functional object is included in the "Field" physical object.
This functional object is included in the following service packages:
This functional object is mapped to the following Functional View PSpecs:
Requirements
| # | Requirement |
|---|---|
| 01 | The roadway field element shall acquire time sync data from an external Stratum-2 time source. |
| 02 | The roadway field element shall obtain time sync data from the System Monitor. |
| 03 | The roadway field element shall obtain time and position data from its local location and time data source. |
Information Flows
| Source | Flow | Destination |
|---|---|---|
| Location and Time Data Source | location and time | Field |
| Network Time Source | time | Field |
| Service Monitor System | time local form | Field |
Standards
Currently, there are no standards associated with the functional object itself though the interfaces may have standards associated with them.