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Presented to TexITE at the Summer Meeting in Midland, TX – June, 2001

John Black, ITS Manager / Systems EngineerNaztec Inc., 820 Park Two Dr. Sugar Land, Texas

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NTCIP - What Is IT?

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NTCIP - A Win Win For Users & Manufacturers

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NTCIP - Where Did It Come From?

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The National ITS Architecture – An Analogy

SDO (Standards Developing Organizations)NEMA, FHWA, ITE, AASHTO, IEEE, SAE, etc.

Traffic ManagementTransit Management

Freight & Fleet ManagementToll Administration

Emergency Management

ISP

Field Device

Musical Notation is a Protocol

Orchestra Section

Title of Musical Score

Composer

Musical notation is a protocol that governs the data exchange between the musician and the musical instrument.

NTCIP Standard Documents Are Protocols

ITS Regional CenterNTCIP Standard Document Composer

An NTCIP standard document is a protocol that governs the exchange of data objects between the ITS Center and the Field Devices.

FieldDevice

NTCIP Working Groups Are The Composers

NTCIP: Transportation Sensor Systems WGTSS

NTCIP: Signal Control and Prioritization WGSCP

NTCIP: Ramp Metering WGRMC

NTCIP: Profiles WGPRO

NTCIP: Joint Cmte on the NTCIP WGSTRGRP

NTCIP: Global Objects WGGOWG

NTCIP: Data Collection and Monitoring WGDCM

NTCIP: Closed Circuit TV WGCCTV

NTCIP: Center-to-center Profiles WGC2C

NTCIP: Base Standards and Protocols WGBSP

NTCIP: Actuated Signal Control WGASC

SDO: Working GroupAbbreviation

The Builder’s Craft

The master craftsman builds each instrument to exact specifications so the musician can perform the function intended by the conductor.

Manufacturers craftITS field devices that conform with ITS and NTCIP standards toachieve the designintended by the SDO

NTCIP Allows YOU to Play in the ITS Orchestra

NTCIP Protocol – How It Works

NTCIP is a PROTOCOL that governs the data exchange between ITS devices and regional centers over a communications network.

Works just like WonkaVision!!

Data Objects

Data Dictionary

Network

The Open Systems Interconnect (OSI) Model

Information Level

Application Level

Transport Level

Sub-Network Level

Object LevelData Objects

Data Dictionary

Physical LayerPhysical Layer

Data Link LayerData Link Layer

Network LayerNetwork Layer

Transport LayerTransport Layer

Session LayerSession Layer

PresentationPresentation

Application LayerApplication Layer NTCIP 1101 - STMFSimple TransportationManagement Framework

NTCIP 2001 – Class B

NTCIP 2002 – Class A & C(withdrawn)

Object Level

Data Objects

Data Dictionary

Physical LayerPhysical Layer

Data Link LayerData Link Layer

Network LayerNetwork Layer

Transport LayerTransport Layer

Session LayerSession Layer

PresentationPresentation

Application LayerApplication Layer

The Object Layer defines the database in the field device in terms of optional and mandatory objects (conformance groups).

The required NTCIP documents defining objects for Actuated Signal Control (ASC) are:

•NTCIP 1201 – Global Object Definitions

•NTCIP 1202 – Actuated Signal Controller (ASC)

The NEMA Working Group on “Field Management Stations” is currently developing NTCIP 1210 – “NTCIP Objects for Signal System Masters” – 1st draft available in third quarter of this year.

Sub-Network Level

Data Objects

Data Dictionary

Physical LayerPhysical Layer

Data Link LayerData Link Layer

Network LayerNetwork Layer

Transport LayerTransport Layer

Session LayerSession Layer

PresentationPresentation

Application LayerApplication Layer

The Physical Layer transmits raw data bits over a communication channel (the “interconnect”)

The Data Link Layer guarantees to the network layer that there are no transmission errors by breaking the input data stream up into frames and sending back acknowledgement frames

NTCIP 2101/2102 – Subnet Profiles is required to implement this level for ASC.

Optional NTCIP documents related to this layer are:

•NTCIP 2101 - SP-PMPP/RS232

•NTCIP 2102 - SP-PMPP/FSK

•NTCIP 2102 - SP-PPP/RS232

•NTCIP 2104 - SP-Ethernet

Transport Level

Data Objects

Data Dictionary

Physical LayerPhysical Layer

Data Link LayerData Link Layer

Network LayerNetwork Layer

Transport LayerTransport Layer

Session LayerSession Layer

PresentationPresentation

Application LayerApplication Layer

The Network Layer uses TCP/IP to send the data packets from a source to a destination.

•NTCIP (Class A) supports “routing” as used by the Internet to pass data between sub-networks.

•NTCIP (Class B) is designed for a single network.

The Transport Layer splits up data from the session layer to ensures that all the pieces arrive correctly after they pass over the network.

The required NTCIP standard supporting this level is:

•NTCIP 2201/2202 – Transport Profiles

This specification is built upon the same RFC standards that define TCP/IP and the Internet

Application Level

Data Objects

Data Dictionary

Physical LayerPhysical Layer

Data Link LayerData Link Layer

Network LayerNetwork Layer

Transport LayerTransport Layer

Session LayerSession Layer

PresentationPresentation

Application LayerApplication Layer

The Application Level defines the syntax, or grammar of the protocol. A good analogy is the way we used sentence diagramming in grade school to study the underlying framework of the English language.

NTCIP 2301 - AP-STMF (Simple Transportation Management Framework) is required and defines:

•SNMP – Simple Network Management Protocol

•STMP – Simple Transportation Management Protocol

Optional NTCIP documents related to this layer are:

•NTCIP 2302 - AP-TFTP

•NTCIP 2301 - AP-FTP

•NTCIP 2301 - AP-DATEX-ASN

•NTCIP 2301 - AP-CORBA

Information Level

Data Objects

Data Dictionary

Physical LayerPhysical Layer

Data Link LayerData Link Layer

Network LayerNetwork Layer

Transport LayerTransport Layer

Session LayerSession Layer

PresentationPresentation

Application LayerApplication Layer

ITE, FHWA and AAHSTO are working together to develop a comprehensive database for ITS called the Traffic Management Data Dictionary (TMDD).

The TMDD includes all the object definitions for the field devices. The following documents are used to define an Actuated Signal Controller (ASC) in the TMDD:

•NTCIP 1201 – Global Object Definitions

•NTCIP 1202 – Actuated Signal Controller (ASC)

Visit the following site to get more information on the TMDD. You can also download Microsoft Access databases and view html files for each dictionary.

http://www.ite.org/tmdd

ITS Framework Example

Recommended Reading

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Conclusions

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