The Development and Application of IEEE CBTC

Standards

Dr. Alan F. Rumsey Delcan, Vice President Rail and Transit Systems

Toronto, Ontario, CANADA

APTA 2012 Rail Conference

IEEE Standards Association (IEEE-SA)

IEEE-SA is “a leading consensus building organization that nurtures, develops & advances global technologies”

IEEE standards “fuel the development and implementation of technologies that influence and transform the way we live, work and communicate”

“Anyone can participate in IEEE standards development”

http://standards.ieee.org/

Communications Based Train Control

A Global Technology

A train-borne method of determining a train’s location, length and integrity

A continuous data communications link between the CBTC train-borne equipment and CBTC wayside equipment

Train-borne and wayside vital processors capable of performing automatic train protection (ATP), automatic train operation (ATO) and automatic train supervision (ATS) functions

CBTC Influences

To optimize the utilization of the rail transit infrastructure by providing

Safety of train movements

Maximizing line capacity

Permitting flexible train movements

Providing for high system availability, with degraded modes of operation

To efficiently move people

IEEE Standards Development Lifecycle

Initiating the Project

Mobilizing Working Group

Drafting the Standard

Balloting the Standard

Gaining Final Approval

Maintaining the Standard

http://standards.ieee.org/develop

Rail Transportation Standards Committee

Rail Transportation Standards Committee (RTSC)

Formed in 1996 as a standing committee of the Vehicular Technology Society of the IEEE

Develops standards using ANSI consensus procedures as administered by the IEEE

Develops standards associated with rail passenger vehicles, trains and systems

IEEE RTSC Working Group 2 (WG2)

WG2 is one of RTSC working groups

Specifically focused on CBTC

Open to all interested parties and includes:

• Transit agencies (from North America and Europe)

• Signal suppliers

• Consultants

• Government agencies

IEEE RTSC Working Group 2 (WG2)

WG2 “Guiding Principles”

Any new CBTC standard should add value to the industry

Development of any new CBTC standard should be achievable within a reasonable period of time

Four CBTC standards developed to date

• 51 meetings held

• ~ 10 to 30 participants at each meeting

• > 100 individuals participated over the years

Initiating the Project

Mobilizing Working Group

Drafting the Standard

Balloting the Standard

Gaining Final Approval

Maintaining the Standard

IEEE CBTC Standards

IEEE Std 1474.1TM – 2004 (R2009):

Communications-Based Train Control (CBTC) Performance and Functional Requirements

• First published in 1999; updated in 2004 to incorporate driverless train operations; re-affirmed in 2009 without revisions

• Standard widely used and referenced around the world

• Also referenced in FRA final rule for Positive Train Control (PTC)

CBTC – PTC Comparison

Automatic Train Supervision (ATS)

Automatic Train Operation (ATO)

Automatic Train Protection (ATP)

CBTC

PTC

IEEE CBTC Standards

IEEE Std 1474.2-2003TM (R2008):

User Interface Requirements in Communications-Based Train Control (CBTC) Systems

• Provides for consistent operations-related and maintenance-related user interfaces

• First published in 2003 and re-affirmed in 2008 without revisions

• Also referenced in FRA final rule for PTC

IEEE CBTC Standards

IEEE Std 1474.3TM – 2008:

Recommended Practice for Communications-Based Train Control (CBTC) System Design and Functional Allocations

• Published in September, 2008

• Captures current state-of-the-art and industry best practice in allocating the functional requirements to individual CBTC subsystems

• Also of value in gaining a better understanding of CBTC system architectures/principles of operation

Major CBTC Subsystems

• Central Equipment

• Wayside Equipment

• Train-borne Equipment

• Data Comm Equipment

Example: Primary ATP Functions

• Determine train location

Example: Primary ATP Functions

• Determine movement authority based on train location and route status

Example: Primary ATP Functions

• Determine and enforce ATP profile

IEEE CBTC Standards

IEEE Std1474.4TM - 2011:

Recommended Practice for Functional Testing of a Communications-Based Train Control (CBTC) Systems

• Defines a preferred sequence and

extent of off-site and onsite functional testing for CBTC systems with the objective of maximizing test efficiency and effectiveness

• Published in September, 2011

CBTC Functional Testing

Full Set of CBTC Sub-functions

Field Functional Testing

All CBTC Sub-functions Fully Verified

Sub-functions Not Fully Verified on a

CBTC Test Track

Sub-functions Not Fully Verified in the Factory

Sub-functions Fully Verified in the Factory

Sub-functions Fully Verified on a

CBTC Test Track

Sub-functions Fully Verified in the Field

Factory Functional Testing

Test Track Functional Testing

Relationship between CBTC Standards

CBTC System Functional Requirements

(IEEE Std. 1474.1)

CBTC System Design and Functional Allocation

(IEEE Std. 1474.3)

CBTC Subsystem Design

CBTC Subsystem Manufacture and

Qualification Testing

CBTC Subsystem Testing and Installation

Verification

CBTC System Functional Testing (Factory, CBTC Test

Track and Field) (IEEE Std. 1474.4)

CBTC System Requirements

CBTC System Acceptance (Trial Operations and

Reliability/Availability/ Maintainability Testing)

IEEE RTSC Working Group 2 (WG2)

In 2010, WG2 was awarded the “IEEE-SA Emerging Technology Award” for the group’s “leadership in developing universally adopted consensus standards for communications-based train control technology”

Summary

IEEE RTSC WG2 has developed four consensus standards for CBTC technology

The IEEE CBTC standards are being recognized and referenced around the world

In developing CBTC consensus standards, WG2 depended totally on the support of the transit agencies, signaling suppliers, and other interested parties