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Description / Abstract:
Communication between an ITS Management Center or portable
computer and an Electrical and Lighting Management System (ELMS) is
accomplished by using the NTCIP Application Layer services to
convey requests to access or modify values of ELMS data elements
resident in the device via an NTCIP network. An NTCIP message
consists of a specific Application Layer service and a set of data
elements. An NTCIP message may be conveyed using any NTCIP defined
class of service that has been specified to be compatible with the
Simple Transportation Management Framework (STMF).
The scope of NTCIP 1213 v02 is limited to the functionality
related to ELMS within a transportation environment.
The remainder of NTCIP 1213 v02 includes the following sections,
and each section builds on the previous section(s):
a) Concept of Operations (Section 2)—providing a description of
user needs (needs for features and needs related to the operational
environment) applicable to ELMS devices
b) Requirements (Section 3)—defining the functional requirements
that address the user needs identified in the Concept of
Operations, and including a Protocol Requirements List (PRL) that
defines conformance requirements, thereby allowing users to select
the desired options for a particular project
c) Dialog Specifications (Section 4)—describing how each
functional requirement is fulfilled (the dialogs define the
standardized procedure for a Traffic Management Center to exchange
data with an ELMS device)
d) ELMS Object Definitions (Section 5)—defining the data
exchanged during communications; some of the definitions are
included via reference to another standard.
e) Requirements Traceability Matrix (Annex A)—providing a table
that associates each requirement to a dialog, and its associated
list of data
f) Object Tree (Annex B)-- provides a graphical representation
of the branch and tree tructure for objects and the organization of
the data defined in NTCIP 1213 v02
g) Astronomical Clock Support (Annex C)—including object
definition modifications needed to support Astronomical Clock
NOTE—Test procedures needed for each functional requirement are
not included in NTCIP 1213 v02, although they may be added in a
future version.
Section 2 and Section 3 are presented at a high level and are of
interest to most readers; Section 4 and Section 5 address more
detailed design issues that are of interest to implementers,
integrators, and testers.