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RAILWAY INDUSTRY DRIVERS
• End of life for 2G incl. GSM-R
(GSM-R IG support commitment until 2030)
• Non-EU countries interested in ETCS, but not
tied up to GSMR
MOBILE INDUSTRY TRENDS
• 4G/LTE as a natural successor to 2G/GSM-R
• 4G air interface “preserved” through 5G
• 4G/LTE is now a mature technology
PROFESSIONAL RADIO STANDARDS
• 3GPP/TCCA & Mission Critical Voice features
part of standardization (Rel.12, 13, 14)
TRADITIONAL SERVICES
• Support the mandatory services of the current
GSM-R / ERTMS systems.
• Satisfy UIC URS specification
• Interoperate with former ERTMS systems
• Offer border crossing capabilities
NEW SERVICES
• On-board passenger video surveillance
• Track & platform look-ahead from drivers
• Remote video of level crossings
• Real time train performance monitoring
• On-board tele-medicine ( future EC rules )
• Value Added Services for Passenger
• Sensors
UIC/ERA/ETSI TC RT (NG2R)/Shift2Rail,..involvement of UIC,ERA, Industry
Ongoing evaluation of aspects as successor technology (following 3GPP evolution),
spectrum, system architecture
GSM-R
2G/3G, WIFI
S&C(*) (ETCS)
Passenger Info
Traffic Regulation
Maintenance
2G/3G/4G,
Satellite, WIFI Passenger Info
Internet Access
GSM-R
or TETRA Operational Voice
(*) Signalling & Control
GSM-R ,
Tetra, DMR
On-Board CCTV, Platform CCTV
RAILWAYS FREIGTH METRO
LTE
S&C(*) (ETCS, CBTC)
Passenger Info
Traffic Regulation
Maintenance
Internet Access
Operational Voice
CCTV
WiFi (propr.) S&C(*) (CBTC)
SINGLE LTE RADIO INTERFACE WITH DIFFERENTIATED QoS
E2E LTE Network
Application Enablers
Location
Presence QoS
Comms
Guest Services
API Platform
Context
Control
Content
Multimedia
Expose network intelligence to
applications & device ecosystem
Service aware network
API Platform API Exposure Suite (AES)
Business Suite
Application Developers
Suite
Application Prototyping
Suite
Application Publishing Suite
API Provider Suite Enables secure
exposure of
differentiating
service capabilities
such as enriched
communications,
content delivery,
service control and
context awareness
Application
Enablers
Railways Applications Safety-critical data communications
Safety-critical voice communications
Safety-related telecoms (e.g. CCTV, PA, …)
Other communications
Public Safety Apps Mission critical data
Mission critical voice (PTT)
Location Based Services
Mission critical CCTV
E2E LTE = 4G RAN + IPMPLS BACKHAUL
GSMR LTE
Voice group call service (VGCS) LTE IMS-based VoIP (VoLTE) + IMS-based Push-to-talk over Cellular (PoC); This
will be realized with 3GPP Rel12,13,14 (GCSE, MCPTT)
Voice broadcast calls (VBS) VoLTE + PoC: IP multicast of voice and video services;
This will be realized with 3GPP Rel12,13,14 (GCSE, MCPTT)
Priority and preemption (eMLPP) Access class barring mechanisms + policy control rules +
Quality of Services (QoS) mechanisms
Functional addressing (FN) Session Initiation Protocol (SIP) addressing
Location-dependent addressing
(LDA, eLDA)
Functional addressing (FN)
Localization services in LTE (Release 10)
Railway emergency calls
(REC, e-REC)
Emergency and critical safety voice services over IMS in LTE (see VGCS)
Fast call set up Very low latency of LTE to support fast exchange of signaling
(e.g., IMS-based PoC) + Access class barring
Data exchange
(SMS, shunting)
IMS-based SMS service
Use Signaling Gateway (SG) interface between Mobility Management Entity
(MME) and Mobility Switching Center (MSC) server
MME-based Short Message Service (SMS) service
LTE CAPABLE OF MEETING KEY REQUIREMENT,
WHILE BRINGING THE POTENTIAL OF BROADBAND
• Several Industry Associations, Regulators and Standardization
bodies investigating the “market feasibility”
• Research projects & pilots proving the “technical feasibility”
http://tecrail.lcc.uma.es
http://systuf.ifsttar.fr/index-en.php
MASSIVE GROUP COMMUNICATIONS
• One to many communications per group
• 10s to 1,000s members per group
• 10s of groups per cell
• Fast call set and floor control
• Pre-emption and Emergency calls
FALLBACK MODE
• Base station continues to offer services to users
under the coverage area even if disconnected from the
network
LTE
Core Network
DIRECT MODE OPERATIONS
• Direct communication btw terminals in group mode
• Relay mode
• Out-of coverage operations
• Special mode of operations
GCSE (3GPP Rel-12) ProSe (3GPP Rel-12 and Rel-13)
IOPS (3GPP Rel-13)
PUSH TO TALK (PTT)
• Primary mode of communications mission and business
critical users
• Emergency calls, late entry…
MCPTToLTE (3GPP Rel-13, 14)
GCSE – Group Communications System Enablers
ProSe – Proximity Services
IOPS – Isolated E-UTRAN Operations
MCPTToLTE – Mission Critical PTT over LTE
3G
PP
evo
luti
on
R
ailw
ays
1995 2000 2005 2010 2015 2020 2025
NG for Railways
2G: GSM, GPRS, EDGE
Standardization & Verification
Pilot, IOT
New EIRENE , BI-ETCS, UIC, ERA, GSM-R IG, UNISIG, 3GPP
Development
GSM-R based on mature GSM products & technology
ETCS over IP
Leveraging the 3GPP ecosystem!!! to continuously benefit from public network evolution, guarantee interworking and roaming
1995 2000 2005 2010 2015 2020 2025
LTE/LTE-A LTA-A-Pro Rel.14
‘16 ‘17
3G – UMTS, HSPA (skipped for railways)
‘16 ‘17
NG backbone (PDH/SDH to IP-MPLS + DWDM) for Railways
tbc
2030
2030
• Key topic to solve is spectrum (e.g. re-farming, new bands, sharing)
• Start with overlay, then smooth migration
All services over LTE
Railway layer over IMS
Multiple user communities (ISP, MSP, Rail, Public safety)
Mission critical voice & ETCS L2 over GSM-R
High speed data pipe over LTE
Full LTE for Rail
GSM-R + LTE pure Data Overlay
Mission critical voice over GSM-R
ETCS applications over GSM-R
Multimedia data over LTE (incl. voice, video, maintenance applications)
GSM-R / LTE InterOpTest for PTT
GSM-R + LTE Multimedia Overlay
(*) In countries where
spectrum is available
and cross-border
interoperability not
mandatory, full LTE
scenarios could be an option
# of subs
traffic
/sub/m
onth
2G
Mobile voice, traffic
scaling proportional
to number of subs.
3G
Start of mobile
broadband. Usage
per subscriber
increasing.
4G
Mobile entertainment, total traffic
driven by average data usage instead
of by number of subscribers.
5G
The rise of new low latency services
along with ultra-narrowband M2M
traffic and device numbers causes
diverging requirements, both technical
and economical. 4G is maintained for
macro layer and coupled with5G for
ultra-dense coverage. 5G aspects as
cloud in Ran/Core, Mobile Edge
Computing or virtualization can be
considered as implementation options
for railways
TRENDS: RAN “PRESERVED” & CORE “BACKWARDS COMPATIBLE”
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