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 LEVEL 1 LEVEL - 2 NAT. Radio EVC ETCS N1 + N2 EV 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 ETCS L1, L2 / existing signalling systems Relay type interlockings Line side signals Electronic interlockings CTC ETCS level 2/Level 1 RBC Interlocking EURO- BALISE EURO- BALISE 6

ERTMS Central Control System Aid Maintenance Balises 1 Local Operation ERTMS 1 local operation Interlocking N Balises N LTVs Compiler 15 Balises 15 7

ETCS/SIGNALLING INTERFACES ETCS level 1 Relay type interlocking/track side elements, discrete Interface with parallel inputs Direct wiring to any interlocking or signal aspects s centralized at relay room (1) s line side installed (2) Relatively simple interface No s interconnection Max. speed determined by line side signals No centralized TSR s Interlocking 1 SIGNAL LAMPS I/F 2 8

ETCS level 1 Relay type Interlocking 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 4 Balises / s CONCENTRATOR TDM PARALLEL I/O INTERLOCKING 9

ETCS level 1 Electronic Interlocking Networked version Non standard interface Manufacturer's owned. TCP/IP s CONCENTRATOR INTERLOCKING 10

ETCS level 2 Relay type Interlocking RBC Safety Interface Vital parallel I/O Transmission Digital module Serial vital comms protocol Non standard Manufacturer's owned TDM VITAL PARALLEL INPUTS Interlocking Technically feasible Operationally not advisable Maintenance Investment Lifecycle 11

ETCS level 2 Electronic Interlocking Serial Interface Vital communications protocol Non standard interface Manufacturer's owned RBC INTERLOCKING Signalling LAN 12

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 RBC Interlocking RBC protocol RBC Interlocking 13

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

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

ETCS level 2 Level 1 L2 overlapping L1 L1 used as fallback system Automatic switch over as national function ETCS L2 ETCS L1 16

ETCS level 1 / level 2 - CTC ERTMS CENTRAL EQUIPMENT ETCS Central Control SIL 2 comms CTC ETCS comms protocol Manufacturer's owned ETCS comms Interface LOCAL OPERATION LEVEL 2 JRU 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) Disadvantages 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 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