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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
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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/
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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
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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
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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
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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
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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
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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
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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)
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CBTC – PTC Comparison
Automatic Train Supervision (ATS)
Automatic Train Operation (ATO)
Automatic Train Protection (ATP)
CBTC
PTC
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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
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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
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Major CBTC Subsystems
• Central Equipment
• Wayside Equipment
• Train-borne Equipment
• Data Comm Equipment
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Example: Primary ATP Functions
• Determine train location
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Example: Primary ATP Functions
• Determine movement authority based on train location and route status
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Example: Primary ATP Functions
• Determine and enforce ATP profile
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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
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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
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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)
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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”
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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