Post on 06-May-2015
description
UK Rail Telecommunications DevelopmentsAndrea Parker BEng MBA CEng FIET FIRSEHead of Signalling and Control Systems (Australasia) , Network Rail Consulting Pty Ltd
Harvinder Bhatia BEng MBA CEng MIET MIRSEPrincipal Engineer [Communications], Network Rail, UK
© Network Rail Consulting
ContentsFixed Telecoms Network 3
Radio Communications 10
Current Developments 19
© Network Rail Consulting
The contents of this presentation remains the intellectual property of Network Rail Consulting and may be used only in connection with the brief for which it
was submitted. It is specifically forbidden to communicate the contents to any third party without prior permission in writing from Network Rail Consulting, and
all reasonable precautions must be taken to avoid this occurring.
2
Fixed Telecoms Network
© Network Rail Consulting
Fixed Telecoms Network (FTN)What does it carry?
GSM-R
Signalling bearer circuits
Electrification controls
Operational and business telephones
Legacy radio systems
IT wide area network
4
© Network Rail Consulting
Fixed Telecoms Network
SDH transmission node
Cabinet for copper cross-connection or HDSLequipment
Fibre cable
Multipair copper cable
Signal post telephone
Lineside signalling equipment
Copper tail cable
GSM-R Base Station
Key
NTP
NTP
NTP
NTP
NTP Network terminating point
Signaller's Telephone
LDT
Signalling Interlocking
GSM-R Base Station
NTP
GSM-R Base Station
NTP
GSM-R Base Station
LDT
Signalling long distance terminal
RTIS Wide AreaNetwork
Office Telephones
NTP NTP
Telecoms Engineering ControlNTP NTP
NTPCore Network
NTPNTP
NTP
GSM-R Mobile Switching Centre (MSC)
Telephone Concentrator
NTP
NTP
NTP
LDT
LDT
NTP
5
© Network Rail Consulting
Telecoms Engineering Control
6
© Network Rail Consulting
FTN Equipment
REB and tower
Main Distribution Frame
Inside REB (battery rack)
Inside FTN Core Node
7
© Network Rail Consulting
FTNx Core Solution Overview
8
© Network Rail Consulting
FTNx Core network resilience to link failures
EdinburghGlasgow
Birmingham
Bristol
Manchester Doncaster
Kings Cross
Victoria
9
Radio Communications
© Network Rail Consulting
Radio CommunicationSafety Purpose
Advise signaller of dangerous conditions
Warn driver of emergency situation
Emergency connection to ECR
Safety Requirements
Secure communications
Emergency over-ride of lower priority calls
Emergency broadcast when required
Technical Solutions (past and present)
NRN* (National Radio Network)
CSR* (Cab Secure Radio)
RETB* (Radio Electronic Token Block)
GSM-R (GSM for Railways)
*Legacy radio systems being phased out
11
© Network Rail Consulting
Why renew radio systems, and why GSM-R?
Safety recommendations – direct signaller to driver communications
Obsolescence and condition of analogue radio systems – NRN 30 years old, CSR at least 20
Interference (especially digital TV) to NRN/RETB
Why GSM-R?
European interoperability legislation mandating GSM-R on TEN-T routes made it a legal requirement
12
© Network Rail Consulting
What is GSM-R?
• Based on Global System for Mobile communications (GSM) 900 MHz standard
• Addition of special facilities required for railway operations
• Interoperable across European railways
• Provides secure communication between driver & signaller
13
© Network Rail Consulting
What is GSM-R?
GSM-R Rail Specific Features
Railway emergency calls: fast set-up time
Functional addressing (call without knowing number)
Location dependent addressing (connected to appropriate location)
Group and broadcast calls
Priority and pre-emption
14
© Network Rail Consulting
Network Rail’s GSM-R NetworkWhat is involved…
2 Switching centres2,500 trackside base stations500 standalone transmission access nodesNew train radio in 9,000 driving cabsNew radio terminal for every signaller’s positionNew operating rules£1Bn+ investment in infrastructure (incl. FTN)Scheduled completion 2014
Network CoverageComplete coverage of the rail network including tunnels and depotsFor high speed (TEN-T) routes, GSM-R signal strength suitable to support ETCS Level 2 working
-83 dBm (Voice)
-80 dBm
-77 dBm (ETCS L2)
15
© Network Rail Consulting
Train Radio HMI and Signaller Terminal
16
© Network Rail Consulting
GSM-R Network
17
© Network Rail Consulting
Typical GSM-R Radio Site
18
Current Developments
© Network Rail Consulting
GSM-R developmentEU member states have invested heavily in GSM-R networks to support voice and ETCS but
GSM-R has a finite capacity due to limited spectrumImplementation of ETCS increases data demand on GSM-RUse of existing circuit switching for ETCS data is very inefficient
The solution:GPRS is a packet switching bearer that overlays on GSM-R which allows multiple users to share a timeslotGPRS is not new but ETCS over GPRS is
20
© Network Rail Consulting
ETCS National Integration Facility (before)
Stapleford Broadwater
Operational GSM-R BTS
REB
Operational GSM-R BTS
REB
FTN
Stapleford Operational GSM-R Cell (voice)
Broadwater Operational GSM-R Cell (voice)
21½ m 26¼ m
Hertford Test Area
Test Track (Bi-Directional)
Normal Service Track (Bi-Directional)
Operational GSM-R Network
21
© Network Rail Consulting
ENIF GSM-R Coverage with GPRS
Stapleford Broadwater
GPRS enabled GSM-R BTS
REB REB
FTN
Stapleford Operational GSM-R Cell (voice)
Broadwater Operational GSM-R Cell (voice)
21½ m 26¼ m
Hertford Test Area
Test Track (Bi-Directional)
Normal Service Track (Bi-Directional)Reference GSM-R Network
Broomhall Repeater
Reference Cell 1 Reference Cell 4Reference Cell 3Reference Cell 2
GPRS enabled GSM-R BTS
(Ref GSM-R Net’)
22
© Network Rail Consulting
ETCS over GPRS (EoG) Project
Objective of EU led Project is to draft new GPRS/ERTMS specifications and test prototype products against the specificationsHigh level specifications have been drafted with ETCS data traffic model
Testing has occurred in France, UK and Denmark
Specifications to be finalised by Dec 2014 (recommendations)
Specifications to be approved as part of ERTMS second maintenance release in 2015
Signalling compatible GPRS products (e.g. EVC and RBC) expected to be commercially available around 2016
23
© Network Rail Consulting
Current ChallengesDegraded mode management when GPRS is not fully available
Start of Mission
Terminal stations setup
Optional or mandatory GPRS requirements within CCS TSI?
Commercial availability of signalling & telecom products
UK plan for ETCS deployment will implement GPRS when needed and when ready
24
© Network Rail Consulting
The FutureEuropean Rail Agency principles for evolution of railway communications:
Transition strategy to move over time to IP based technologies
Split the application and communication layers for voice and data
Involve telecom operators
Use off the shelf technology
Have common operational requirements and interoperability
Maintain a high level of safety
Evolution to be compatible with GSM-R
25
© Network Rail Consulting
Summary
FTNx will be the bearer for the future to support signalling and other railway applications
Radio communication forms the backbone of modern signalling systems
GSM-R is the chosen European system
GPRS is the next step
26
Thank you
andrea.parker@networkrailconsulting.com
harvinder.bhatia@networkrail.co.uk
Network Rail Consulting Pty Ltd
Level 20 Tower 2 Darling Park
201 Sussex Street
Sydney NSW 2000
www.networkrailconsulting.com