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Track 5: On-Board ITS in Rail Transit
Rail Conference – Baltimore, MD June 2002
IEEE 1473-L
Communications Protocol
Experience in Rail &Transit
Tom Sullivan
Transportation Systems Design, Inc.
Oakland, CA
5/25/2017
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Topics
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IEEE 1473-L Review
Recent Transit Experience
Where we may be headed…
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Track 5: On-Board ITS in Rail Transit
Rail Conference – Baltimore, MD June 2002
What is IEEE 1473-L?
Rail Transit Vehicle Interface Standard
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IEEE 1473-L
Based upon
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ANSI/EIA 709.1 – Communications Protocol
ANSI/EIA 709.3 – Physical Layer 1
LonWorks
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Open, Control Network Protocol
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Portable to any microprocessor
Millions of “Neuron” nodes deployed
ISO OSI 7-Layer Model
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CAN Vs LonWorks
CAN
LonTalk
User must develop
Application
Presentation
Authentication
Session
Transport
Network
Data Link
Physical
User must develop
User must develop
User must develop
User must develop
Physical Media
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LonWorks Neuron Nodes
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1 Uniform Architecture
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Simple & Powerful
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MAC
WHEN() => ACTION
Standardized
Interoperable
2 Silicon Sources
3 Internal CPUs
FIRMWARE
Protocol
NET
Scheduler
I/O
Applications
Library
APP
Unique 48 Bit
Serial Number
ROM
Communications
Port
RAM
EEPROM
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Interoperability - NYCT
NYCT IEEE 1473-L Propulsion Trainline
Kawasaki
Bombardier
LonWorks
LonWorks
E1
LonWorks Tunnels through E1
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Interoperability - RTVISC
IEEE 1473-L Trainline
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LonMark Profiles
Hardware Outputs
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Network “Object”
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Open Standard
Open Interfaces
Communication via
Standard Network
Variable Types
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SNVTs
Object Name & Number
Input
network
variables
Mandatory
Network Variables
Optional
Network Variables
Output
network
variables
Configuration
Properties
Manufacturer Specific
Network Variables
Hardware Inputs
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SNVTs
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Standard Network Variable Types
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Many predefined
Engineering Units
SNVT Examples
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Simple Types
 Current, Temperature, “HVAC_Mode”
Complex Types
 TimeStamp
 Earth Position (GPS)
SNVT Master List
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Track 5: On-Board ITS in Rail Transit
Rail Conference – Baltimore, MD June 2002
Where IEEE 1473-L is Used
Trains, Planes & Automobiles…
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Vehicle Applications
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US Navy
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Trucks, Buses & Autos
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Attack Helicopters
Warships
Bus Transit, Traffic & ITS
Rail Vehicles
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Freight, Commuter Rail
Heavy & Light Rail & APMs
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Track 5: On-Board ITS in Rail Transit
Rail Conference – Baltimore, MD June 2002
What’s Next?
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IEEE 1473-L Future…
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Advanced Networking
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Interoperation with other Standards
Open Wireless Networking
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Increased Safety & Security
Real-Time Diagnostics
Powerline Transceivers
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ANSI/EIA Standard
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AAR: > 3 mile long trainlines
Vehicle Retrofits
Other Advanced Transit Applications
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E.g., “Single Wire Switch Machine”
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Wireless Networking Today
Control Center
Wireless
Transceiver
Wireless
Transceiver
Proprietary
Wireless Data Network
IEEE 1473-L - Trainline Network
IEEE 1473-L - Trainline Network
Typical Architecture
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Open IEEE System Network
Control Center
IEEE 802.3u (100BaseT)
Wireless
Transceiver
IEEE 802.17
Resilient Packet Ring
Wireless
Transceiver
Open IEEE 802.11
Wireless Data Network
IEEE 1473-L - Trainline Network
IEEE 1473-L - Trainline Network
Open Network Architecture
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Benefits of IEEE Standards
Control Center
IEEE 802.3u - 100BaseT LAN
Wireless
Transceiver
Wireless
Transceiver
Wireless
Transceiver
Wireless
Transceiver
Wireless
Transceiver
IEEE 802.11
Wireless Data Networks
IEEE 1473-L - Trainline Network
IEEE 1473-L - Trainline Network
Frequent Inexpensive Wireless Nodes
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IEEE 1473-L Summary
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Standard
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Open
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Protocol, Profiles & SNVTs
Interoperable
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De Jure & De Facto (U.S.)
Tunnel  IP/Ethernet, T1, T3, etc.
IEEE-1473-T - Gateway (or Tunnel)
IEEE WG9 – New Rail Transit Vehicle Profiles
Robust, Safe & Secure
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Track 5: On-Board ITS in Rail Transit
Rail Conference – Baltimore, MD June 2002
For More Information
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