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INDUSTRY GROUP

IP Migration

of GSM-R

Markus Myslivec Head of PT Solutions

ETSI TC RT Vice-Chairman

Frequentis AG

www.gsm-rail.com

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Topics

• WHAT to migrate and to standardize

• WHY to do this

• WHICH work is done by WHOM and WHERE

• HOW this will influence future systems

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We will end up with a revolution …

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IP Transport

WAN / BACKHAUL

IP Transport

AIR

IP Transport

LAN

IP Transport

LAN

IP Transport

LAN

PUBLICMOBILE

LINE-SIDE OPS & DISPATCH

Border Node

Border Node

Border Node

Media Server

Application Server

User Management

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… but go for an evolution, hence migration!

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GSM-R Fixed Terminal Subsystem

GSM-R Infrastructure / Network

Line-side Phones

PSTN / PABX

Packet

Switched

Circuit

Switched BSS

NSS

ETCS RBC

GSM-R Mobiles

ETCS OBU

LAN / WAN

Voice Recorder

BSCBTS

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IP based applications, sub-systems and interfaces

• Applications and services evolving to IP Recording, ETCS

• Sub-systems evolving to IP NSS, FTS, Mobiles

• Interfaces evolving to IP between and within sub-systems

• Future IP based architecture and interfaces

– “all over IP“ as e.g. LTE

• Choosen interface technology SIP, IP

– Basis of future systems

– e.g. LTE IP, IMS SIP

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Motivation and goals for migration

• Apply new technology, IP, where feasible overcome obsolesence

• Follow commercial market and products decrease cost

• Do not change the whole system at once secure investments

Gain from IP benefits but address challenges!

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IP benefits & challenges

• Benefits

– One multi-service network for different types of applications

– Increase of reliability & availability (resilient architecture)

– Efficient use of limited capacity at the interfaces in question

• Challenges

– Quality-of-service

– Security

– “Interconnection and interworking with legacy, already rolled-out systems

– Future proof implementation vs. decreasing life-cycle of off-the-shelf

components

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Standardisation concerning IP migration

• UIC / ERA

– Guidelines

– Change requests and requirements

– FRMCS project to compile requirements for next generation system

• GSM-R TIG

– Review of change requests and requirements

• technical feasibility

• commercial impact

• ETSI Technical Committee for Railway Telecommunication

– Technical specifications

– Dedicated working group for next generation system (NG2R)

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Update on “IP and SIP Interfaces” at ETSI

• Interface between NSS and FTS (ETSI TS 103 389 – v3.0.0)

– NSS/FTS to Voice Recording System

– Supplementary services (in line with EIRENE requirements)

• “A over IP” (NSS – BSS)

– Change requests prepared by TC RT under approval within ETSI and 3GPP

• “A-bis over IP” (BSC – BTS)

– Working on definition of a Technical Report (TR) for “Abis over IP“

• “GRPS/EDGE requirements for ETCS“ (ETSI TS 103 320)

– Define which (already published standards) are applicable to rail

• “AT commands for GPRS/EDGE operation“

– Interface within the On-Board Unit

– Interface to the GSM-R mobile termination changes because of the bearer

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Implementation works and roll-out

• Evolution & migration of GSM-R core network from

“Release 99“ to “Release 4“

– Austria, Germany, Great Britain, Norway, …

• Roll-out of IP based controller equipment (core nodes and terminals)

– Norway, Ireland, Lithuania, …

• Possible implementation of SIP based interface between

NSS and FTS

– Germany, …

• ETCS over GPRS

– Great Britain, …

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Going beyond evolutionary approach for IP

• IP is already defined as basic technology for next generation

communication (by UIC, ERA and industry)

• Current IP evolution enables future path to an IP based railway

communication system will end up in “next generation architecture”

• IP capable user-devices are continuously rolled-out

• Services, including railway specifics, will be accessible independent of

access technology and service distribution

• Other domains support and drive standardisation, e.g. 3GPP MCPTT and

OMA PCPS standards for mission critical services expected 2016

MIGRATION to FRMCS is already on the way and progresses!

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On track!

Thank you.

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