gsm-r network evolution network... · gsm-r network evolution era ccrcc ... 10 ... bss gsm-r...
TRANSCRIPT
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INDUSTRY GROUP
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GSM-R Network
Evolution ERA CCRCC
Lille 12-13 Nov 2013
Ola BERGMAN Head of GSM-R Standardisation
NSN
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Agenda
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Network Redundancy
Towards IP
Rel 4 Core Architecture
How GSM-R Infra can help mitigate Interference
Compatibility Testing to ensure Interoperability
Very brief look into long term future
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A GSM-R Network
Sub-systems make up the network
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Sub-system redundancy
A major difference to Public Operators
• An outage of a radio base station (BTS) in a Public Network hurts
• In GSM-R it can impact train operation - so very critical
• Sub-systems in GSM-R are fully redundant
Some measures to improve Availability
• redundant power modules
• redundant cooling units
• redundant interfaces
• …
• uninterrupted operation at module exchange
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Site Geo-redundancy
Two geographically distant GSM-R Core Sub-systems to protect against Disasters
GSM-R Core on Location A GSM-R Core on Location B
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Current circuit-switched GSM-R systems …
GSM-R Fixed Terminal Subsystem
GSM-R Infrastructure / Network
GSM-R Mobiles
ETCS OBU
Line-side Phones
PSTN / PABX
ISDN PRI
ISDN PRI
QSIG
ISDN PRI
QSIG
Circuit
Switched
Circuit
Switched
SS7 ISUP
ISDN BRI
NSS
BSS
ISDN PRI
ETCS RBC
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… evolve to IP based ones
GSM-R Fixed Terminal Subsystem
GSM-R Infrastructure / Network
Line-side Phones
PSTN / PABX
ISDN PRI
QSIG
ISDN PRI
QSIG
Packet
Switched
Circuit
Switched
LAN / WAN
BSS
NSS
ETCS RBC
GSM-R Mobiles
ETCS OBU
ISDN PRI
SS7 ISUP
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IP based applications and sub-systems
• Applications and services evolving to IP
– ETCS
– Voice Recording
– Fixed-line voice communication
• Sub-systems evolving to IP
– GSM-R Infrastructure / Network“ Release 4“, “GPRS/EDGE“
– GSM-R Fixed Terminal Subsystem “IP based“
– GSM-R Mobiles “GPRS/EDGE“
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Release 4 Core
Upcoming GSM-R Core Network is the evolution of
legacy TDM based Core to Packet Based Core –
from Release 99 to Release 4
The Bearer Independent Core Network architecture is
defined by 3GPP in Release 4 specifications and since long widely deployed in public mobile
networks around the world
‘Layered Architecture’ :
Separation of the control and signalling plane (Call
Server) from the bearer plane (Media Gateway)
Release 4 is fully compliant with GSM-R baselines
and EIRENE specifactions
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3GPP R4 / BICN Network Components
ETCS
PDN
PSTN
Other Eirene
Dispatcher
VRS
SMS-C / VMS OAM
SGSN / GGSN
Provisioning & Monitoring
PCU
BSC / TCU
BSC / TCU
BTS
BTS Cab/EDOR /Handhelds
Media Gateway MSC
Server
HLR SCP / EIR
RPM / OTA
Media Gateway
Base Station Subsystem (BSS)
x
Network SubSystem (NSS)
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Interference Mitigation - improved GSM-R
coverage
Interferences mitigated by improved radio coverage
• For spurious emissions from outside of the R-GSM band improved radio
coverage will improve C/I (carrier over interferer ratio)
Implementation
• Increased power levels on existing radio sites can, to a certain extent,
improve radio coverage
– However some radio sites already emitting at max power
– Cab radios could be saturated by too high power
• New radio sites (BTS) to be inserted in addition to existing ones
– Requires revised radio design
• Improved antenna (e.g. narrower beam / higher gain) can improve C/I
– Useful in some cases
12.11.2013
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Interference Mitigation – Tuning of radio
engineering parameters
• Example: If interference is disturbing some operation such as a
handover HO, this HO can be advanced/delayed by adjustment of the
system parameters of the concerned radio cells
• Requires careful study by radio engineering expert in each case
• Since radio environment changes over time, continuous performance
observation and, when no longer satisfactory, required adjustments
12.11.2013
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GSM-R IOT 2014 co-financed by the European Commission
MSC/VLR/HLR/…
MSC/VLR/HLR/…
BSS
GSM-R
Network
GSM-R
Network
BSS
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GSM-R IOT 2014 co-financed by the European Commission
MSC/VLR/HLR/…
MSC/VLR/HLR/…
BSS
GSM-R
Network
GSM-R
Network
BSS
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CAB
radio
MSC/VLR/HLR/…
BSS
GSM-R Network
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GSM-R IOT 2014 co-financed by the European Commission
Interoperability of on-board GSM-R Cab radio with
track-side GSM-R network
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MSC/VLR/HLR/…
BSS
1.
2.
CAB
radio GSM-R Network
Handheld radios
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GSM-R IOT 2014 co-financed by the European Commission
Interoperability of Operational & Shunting Handhelds with
GSM-R network
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Integration of Train Controller Systems
(Dispatcher Systems)
MSC/VLR/HLR/…
BSS
1.
2.
CAB
radio GSM-R Network
Handheld radios
Train Controller
3.
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GSM-R IOT 2014 co-financed by the European Commission
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Global IOT
Phase 1&2 > Nortel and NSN -
NSS/ NSS & NSS/ BSS EIRENE
5/13
> Static roaming
functionality
> GSM services > Advanced Rail
services
IOT Phase 3 Initial &
Regression > NSN and Nortel - NSS/ NSS
& NSS/ BSS EIRENE 5/13
> Inter PLMN connections
tested
> Additional features tested
Global IOT &
Field Phase
4.1 > Nortel BSS to NSN
NSS EIRENE 6/14
Global IOT
Phase 4.2 > Nortel NSS
to NSN BSS EIRENE 6/14
IOT Phase 3 extension > Focus on additional features (late entry,
eMLPP, Call barring and Access Matrix,
Class of Registration, …)
Global IOT
Phase 9.3
> KCC BSS
to NSN NSS EIRENE
7/15
Global IOT
Phase 9.2
> KCC NSS
to NSN BSS EIRENE
7/15
Global IOT
Phase 9.1
> KCC NSS
to NSN EIRENE
7/15NSS
2013 - 14
Global IOT
Phase X > GSM-R NSS/ NSS &
NSS/ BSS & E to E > GSM-R – ETCS L2
CSD updates
> GSM-R – ETCS L2 PD
>QoS
>Validation of Test Specs
EIRENE
5/13 Issued 2000
EIRENE
6/14 Issued 2003
EIRENE
7/15 Issued 2006
EIRENE
7.4.0/15.4.0
2002 Q2/ Q4 2004 Q1/ Q4 2005 Q1 2011 Q2 2011 Q3 2011 Q1 2007
GSM-R IOT 2002 - 2014 co-financed by the European Commission
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4G - LTE, LTE-A, … , 5G,…
GSM-R
Next Gen
2G – GSM, GPRS, EDGE
Pilot, IOT
NG Specifications UIC, ERA, GSM-R IG, UNISIG, 3GPP
R&D
Why consider a Next Generation System?
～10 years
～10 years
???
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Today’s activities towards Next Generation
• GSM-R Core architecture Rel 4 is introduced
• Stepwise introduction of IP …
• …now available on several interfaces interconnecting GSM-R subsystems,
e.g. Train Controller system
• ETCS over GPRS (i.e. over Packet Switching PS) is a stepping stone for…
• …much better utilisation of radio resources
• …making ETCS bearer independent
• ER-GSM, enhancement of the European UIC Frequency Band for GSM-R
by 3MHz, i.e. 75%
• GSM-R Industry Group committed to support all activities to specify the
Next Generation … • …with special focus on Seamless Migration from GSM-R to NG
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Thank you!
the Future of Rail
Communication –
a Joint Enterprise