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Draft for review only

Domains of Interest

Each TC204 WG focuses on a specific domain of interest, comprising of multiple key concepts.

ITS Foundational Documents

Documents from various working groups define TC204's foundational documents upon which the remainder of concepts are built.

ARC-IT Foundational Service Packages

ARC-IT presents a multitude of service packages (which are similar to FRAME "solution patterns"). Each service package represents a slice of the architecture that address a specific ITS service (e.g., traffic signal control) and is often visually represented using a physical view diagram that depicts physical objects connected with information flows. Within ARC-IT, each information flow depicted on a physical view diagram is hyperlinked to a communication view, which identifies specific standards that can be used to implement the flow and provides the likely geographic context for each identified solution.

The diagram below shows the ITS Services that ARC-IT classifies as support packages. By interrogating these support service packages, it is possible to identify what this site considers the foundational standards.

ARC-IT Support (Foundational Service Packages)

Foundational Service Packages

Example: SU05: Location and Time

This service package identifies the external systems and interfaces that provide accurate location and time to intelligent transportation system devices and systems. Relevant Regions: Australia, Canada, European Union, and United States

A physical view of the service package is shown below

physical108 SU05

Each information flow on the ARC-IT website is hyperloinked. For example, by clicking on the information flow (1C) time local form between Center and Service Monitor System

(1C) time local form

ARC-IT provides the following definition:

The Communciation solution NTP - UDP/IP 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.

And by clicking on the "Communication Solutions" tab, the user can reveal the communication view diagram as follows:

NTP - UDP_IP