Pathway Communications Unit

Overview
Functionality
Triples
Security
Interfaces Diagram
Standards

Overview

The 'Pathway Communications Unit' provides wireless communications between the pathway infrastructure (either indoor or outdoor) and nearby mobile devices; Communications with adjacent field equipment (including other PCUs) and back-office centers that monitor and control the PCU are also supported. The PCU provides basic radio communications supporting the lower layers of the OSI stack (TransNet and SubNet layers of the ARC-IT communications model). Importantly, it can also serve as a reference for mobile devices to determine their position more accurately (e.g., through triangulation or other means).

This physical object is included in the following Service Packages:

Functionality

Functional Object
PCU Communications

Triples

Source	Flow	Destination
ITS Object	local ITS information	Pathway Communications Unit
Other ITS Objects	local ITS information	Pathway Communications Unit
Pathway Communications Unit	local ITS information	ITS Object
Pathway Communications Unit	local ITS information	Other ITS Objects
Pathway Communications Unit	communications signature	Personal Information Device
Pathway Communications Unit	communications signature	Transportation Information Center
Personal Information Device	communications signature	Pathway Communications Unit

Security

This physical object has the following security levels for the associated service packages.

Physical Object Security
Security Class	Confidentiality	Integrity	Availability	Service Package
Class 5	High	High	High	ITS Communications
Class 1	Not Applicable	Moderate	Low	Personal Wayfinding

Interfaces Diagram

Standards

Currently, there are no standards associated with the physical object itself though the interfaces may have standards associated with them. For standards related to interfaces, see the specific information flow triple pages.