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GNSS for Train Control and Management Systems: Challenges and Opportunities for a Global Service

Ninth Meeting of the International Committee on Global Navigation Satellite Systems Applications and Experts Seminar

Prague, Czech Republic 10 November 2014

Francesco Rispoli

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Satellite-based solutions for Train Control Systems

Exploit new technologies

Ensure compatibility with signaling systems

market driven

GNSS Assets •  Multii Constellation •  Wide Augmentation Networks •  Local Augmentation Networks

Train Control Needs •  Train positioning •  Track occupancy •  Train integrity

Making investments more

attractive

Space technology Rail applications

Reduce track-circuitry

GNSS & Rail

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A Global challenge

3

SHIFT2RAIL IP2

Advanced Traffic Management and Control System

IP2 TD4

Fail-safe train positioning

2012 2015 2013 2022

Next Generation Train Control - WP7

European GNSS Agency

UNISIG WG Satellite

USA

China

Europe Stake-holder’s Roadmap

Ref: BEIJING JIAO TONG UNIVERSITY

Ref: CRS Report for Congress

Ref: NGTC

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4

Specific applications

heavy haul freight low traffic

urban nodes

v  lower operational costs v  increase capacity v  increase safety

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ERTMS-ETCS System

5

virtual balyse

The aim is to reduce cost of ETCS trackside by reducing the number of (real) balises in the track, which would also increase availability, reduce exposure to theft, vandalism etc. To minimize the impact on ETCS the concept of “virtual balises” was developed, in which a GNSS based positioning system shall confirm train position at defined reference points This also allows handling of gaps in coverage, compared to a solution which requires permanent coverage

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n 1 2

THR: 3e-8/1 h

CI ~ 14 m

THR: 1.4e-10/1 h

CI ~ 3 m (pt)

THR: 3e-8/1 h CI: 20 – 100 m

Ref. 3InSat project Safety case (Ales Filip, AZD)

Approaching Dangerous point

Start of Mission

Normal operation

GNSS Target Performance: ETCS Level 2

pt

ETCS «linking»

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Virtual Track Circuit Protection Level

Train Integrity

ION 2014, Tampa

~ 40-60% + capacity

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Reference architecture

 

Radio  Block  Center    (RBC)

TALS

RS 1 RS 2 RS n …  

Track  Area  Augmenta/on  Network  

LDS & Train Integrity

Wide Area Augmentation Networks

QoS

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Dependability

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availability

reliability

safety

maintanability

dependability RAMS

Railways signalling QoS

GNSS performance

continuity

availability

Integrity

accuracy

GNSS QoS

“Dependability” is the capability of a system to deliver the correct service with an acceptable trust, specially in presence of faults, either due to internal or external causes.

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Harsh railway environment

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MOPs for Rail Applications ?

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3InSat

ERSAT ERTMS-ETCS Test Site

2012 2013 2014 2015

Shift2Rail

2016 2017 2018

Development & Test satellite technologies for rail signalling applications: Ø  Sat-com

Ø  Geo-localization http://artes-apps.esa.int/projects/3insat

Integrated Test-Bed Ø  EGNOS + Local Au-Networks

Ø  Multi-bearer TLC

Ø  Signalling

Joint Undertaking for innovation in rail sector Ø  IP-2: Innovative train control systems http://www.shift2rail.org

Satellite-based projects roadmap

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ERSAT: Test Bed for Integrated Tests on field

50 km

IP-based TLC

L2 Virtual balyse

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GNSS adoption for train control is a global challenge

•  Tecnology:

•  Validation of GNSS technology developed for other applications

•  Dependability of GNSS parameters

•  QoS for interfacing Augmentation networks

•  Procedures:

•  Adaptation of certifications released by other sectors (ie aviation)

•  Updating of existing reference norms

•  Contractual:

•  Liability

•  Global coverage

Conclusion

THANK YOU FOR YOUR ATTENTION

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