interfacing etcs with legacy cc-systems track - side

INTERFACING ETCS WITH LEGACY CC-SYSTEMS
TRACK - SIDE
NEED FOR MIGRATION
•
•
Elimination of National Systems and their replacement
with ETCS
– In most cases coming to the end of their life cycle.
Two different strategies:
– All train first, then trackside straight to ETCS in a big – bang.
– Trackside dual (or triple fitted) as an overlay, then gradual fitting of
trains.
•
• Need to interface to National Systems.
Need to replace or enhance the existing Signalling
Systems
2
MIGRATION STRATEGIES
•
GRADUAL MIGRATION
– Maintain the existing ATP National System
– Trains equipped with ETCS
• STM national system
–
Automatic switch over can be performed (national function)
• Full ATP national system
–
No Automatic switch over. Only under special design of dedicated
interface
GSM-R
Radio
LEVEL 1
LEVEL
2
NAT.
EVC ETCS
EV
N1 + N2
C
BTM
ETCS -MMI
NATIONAL
3
MIGRATION STRATEGIES
• GRADUAL MIGRATION
– It allows progressive ETCS implementation
•
•
On board
Trackside
– ATP national system as a fall back during a period as desired
– It allows a mixed traffic of equipped and non equipped trains
– No need of special interface between ETCS/ATP track side
•
Eurobalises for beginning and end of ETCS territory
ETCS L1 or L2
Existing National System
4
MIGRATION STRATEGIES
•
Spanish experience
– Trains equipped with ETCS L1 and L2 and complete independent
ASFA national system (no STM)
ETCS L2
ETCS L1
ASFA National System
5
INTERFACES
•
•
Interfaces ETCS L1, L2 / existing signalling systems
– Relay type interlockings
– Line side signals
– Electronic interlockings
– CTC
ETCS level 2/Level 1
RBC
Interlocking
LEU
EUROBALISE
LEU
EUROBALISE
6
INTERFACES
ERTMS
Central Control
Balises
LEU 1
System Aid
Maintenance
Local Operation
ERTMS
LEU 1
Balises
LEU N
local operation
Interlocking
LEU N
LEU 15
Balises
LEU 15
LTVs
Compiler
7
ETCS/SIGNALLING INTERFACES
• ETCS level 1 – Relay type interlocking/Track side elements
No LEUs interconnection
Max. speed determined by
line side signals
No centralized TSR´s
•
2
SIGNAL
LAMPS I/F
LEU
LEU
LEU
LEU
LEU
LEU
LEU
LEU
Interlocking
LEU
1
LEU
•
•
•
LEU, discrete Interface with parallel
inputs
• Direct wiring to any interlocking
or signal aspects
• LEUs centralized at relay room
(1)
• LEUs line side installed (2)
Relatively simple interface
LEU
•
8
INTERFACES
•
ETCS level 1 – Relay type Interlocking
– LEU Networked version
• TCP/IP suitable for fibre optic comms. links to interlocking
–
–
and Control Centre
• Temporary Speed Restrictions direct from Control Centre
Remote Maintenance and Diagnosis
Max. speed can be higher
LEU
LEU
LEU
LEU
INTERLOCKING
PARALLEL I/O
LEU
LEU
LEU
LEU
LEU
LEU
LEU
LEUs CONCENTRATOR
TDM
4 Balises / LEU
9
INTERFACES
• ETCS level 1 – Electronic Interlocking
LEU Networked version
Non standard interface
• Manufacturer's owned.
LEU
LEU
LEU
LEU
LEU
LEU
LEU
LEU
LEU
LEU
LEUs CONCENTRATOR
INTERLOCKING
TCP/IP
LEU
–
–
10
INTERFACES
• ETCS level 2 – Relay type Interlocking
•
Safety Interface
• Vital parallel I/O
• Transmission Digital module
• Serial vital comms protocol
• Non standard
• Manufacturer's owned
RBC
TDM
VITAL PARALLEL INPUTS
Interlocking
•
•
Technically feasible
Operationally not advisable
• Maintenance
• Investment
• Lifecycle
11
INTERFACES
ETCS level 2 – Electronic Interlocking
– Serial Interface
– Vital communications protocol
– Non standard interface
• Manufacturer's owned
RBC
INTERLOCKING
•
Signalling
LAN
12
INTERFACES
•
ETCS level 2 – Electronic IL. Spanish experience
– Westrace comms protocol has been implemented into Alcatel´s
RBC in Spanish HS lines:
• La Sagra – Toledo; Segovia – Valladolid; Lérida – Barcelona
– Invensys RBC comms protocol has been implemented into
–
Alcatel´s Intersig interlocking in Córdoba – Málaga HS line
Westrace comms protocol has been implemented into Siemens
CBTC in L9 driverless Barcelona Metro
Interlocking protocol
Interlocking
RBC
RBC protocol
RBC
Interlocking
13
INTERFACES
•
ETCS Level 2 – Level 2. Different manufacturers
– RBC - RBC Safe Communication Interface is being specified within
UNISIG.
UNISIG SUBSET – 039. FIS for RBC - RBC handover.
UNISIG SUBSET – 098. RBC – RBC Safe Comm. Interface.
UNISIG SUBSET – 099. RBC – RBC Test specification for Safe Comm. I/F
RBC
RBC
Signalling
LAN
14
INTERFACES
•
ETCS level 2 – Level 1
– Crossing from Level 2 to Level 1 is performed automatically on
–
board (national function)
Eurobalises marking the border of Levels 1 an 2
ETCS L2
ETCS L1
15
INTERFACES
•
ETCS level 2 – Level 1
– L2 overlapping L1
– L1 used as fallback system
– Automatic switch over as national function
ETCS L2
ETCS L1
16
INTERFACES
• ETCS level 1 / level 2 - CTC
CTC
SIL 2 comms
ETCS
Central Control
ERTMS – CENTRAL EQUIPMENT
ETCS comms
Interface
ETCS comms protocol
Manufacturer's owned
LOCAL
OPERATION
LEVEL 2
JRU
LEU
CLC
hot stand by
RBC
INTERLOCKING
Eurobalises
LEVEL 1
ETCS LEVEL 1 EQUIPMENT
17
CONCLUSIONS
• GRADUAL MIGRATION
– Maintain the existing ATP National System during migration perio d
• ETCS Level 1
– Advantages
•
•
•
•
Overlays existing signalling with minimal change
GSM-R not required
Interoperability now well proven
On-board is compatible with higher levels (add radio)
•
•
•
No capacity improvement (can be negative unless in -fill is fitted)
High Cost (Line side Electronic Unit + in-fill+ cabling)
Trackside does not migrate easily to higher levels
– Disadvantages
• ETCS Level 2 with SIGNALS
– Advantages
•
•
Overlays on existing train protection
Balises become fixed (no trackside electronics)
– Disadvantages
•
•
GSM-R is required
Radio coverage may need to be improved over voice
18
CONCLUSIONS
• ETCS Level 2 WITHOUT SIGNALS
– Advantages
•
•
Cab-signalling system with cost savings
Significant capacity increases through variable train detection sections
– Disadvantages
•
•
All trains need to be fitted
Radio based cab-signalling of this complexity is new to the mainline railway
industry
• Fall back system requested?
–
–
High density traffic lines
Low traffic lines
• Signalling Systems
–
Cost effective solutions/technical feasibility
•
•
Gradual enhancement
Replacement
19