solution overview brochure connected signalling

7/30/2019 Solution Overview Brochure Connected Signalling

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Connected Signalling:

Improve the Utilisation of Your Trackside Networks


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Solution Overview

Railway infrastructuremanagers candeliver more services to a wider variety of customerswhen they

move to an IP architecture in their trackside fibre-optic networks. This solution overview discusseswhy moving from traditional networking technologies to a morecapable IP design opens the door to

cost savings andopportunities to deliver new revenue-generating services.

In this document, youll learn:

Why other industrieshavemoved to an IP architecture

How the IP network is designed tobe resilient and support very high availability of services

AboutConnected Signalling, Ciscos mission-critical network architecture for railway

infrastructure companies

The ChallengesRailway infrastructure managers face threekey challenges:

Maintaining a safe operating environment for personnel and trainmovements

Improving theutilisation of their assets

Increasing theefficiency andproductivity of their operations withina changing technology

environment

The constant focus on safety is necessary to ensure the safemovement of trains, avoid accidents,

and reduce incidents that lead todelays for which penalties are due. Better utilisation of the track

and trackside infrastructure through preventative maintenance and targeted upgrades is necessary

to support the demand for increased train movements, especially in the face of limitedbudgets.

Finally, anygains in theefficiencyof routine operations, for example through a reduction of

complexity or the ability to perform repairs and upgrades in less time, will support the organisations

ability to invest in a new infrastructure that in turn can lead to higher revenues.

TheCiscoConnected Signallingsolution provides railway infrastructure operatorswith concrete

means to improve theutilisation of the tracksidedata networks and reduce complexity, without losing

the focus on safety.

Solution OverviewConnectedSignalling is an architectural blueprint that details how todays trackside fibre-optic

networks canbe upgraded to a highly resilient infrastructure that makes use of dense wavelength-

divisionmultiplexing (DWDM) technology, to support Ethernet and IPMultiprotocol Label Switching

(MPLS), and in turn, help ensure the very high availability of services. It is basedonCiscosMission-

Critical Network Design,whichwasspecifically adapted for the railway environment. TheMission-

CriticalNetworkDesignwas theblueprint for the first all-IPnetwork to support air trafficmanagement.

This IP network supports both radar and voice communications, and has been in reliable use in

Romania sinceMay2008.

TheConnected Signallingarchitecture allows for thesecure segregation of services in thenetwork

so that safety-critical applications such as train control and signalling, as well as standardbusiness

services including video surveillance traffic and telephony canbe supported in a single highly

resilientnetwork. Thecurrent synchronous digital hierarchy (SDH) networks common to railway

infrastructure cannot support thehigh bandwidth requirements for video traffic or other services in a

cost-effectivemanner. Instead, theyprevent the cost-effective deployment of additional applications

that can improve safety, reduce delays, or generate additional revenues. Theupgradeof trackside

fibre-optic networks to a Connected Signalling design allows for improved utilisation of these

network assets.

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Connected Signalling was designedas an open transmissionnetwork as defined in EN50159 and,

properly configured against your service-level requirements, meets the convergence performance

of anSDH network. Convergence times the time required for the network todetermine a newroute

for traffic in the event of a failure are often less than 50milliseconds (ms). Cisco technologies,

includingForwardError Correction (FEC) to enable thedetection and rerouting of trafficwhile a fibre-optic cable is being cut, as well as ResilientEthernet Protocol (REP), support fast convergence.

A rangeofmethodscombined togetherhelp toachieve therequirednetwork resilience,enabling railway

infrastructure operators to reliablydeliver applicationdata and services. Thesemethods include:

Ciscos Mission-Critical Network Design

Redundant links

Redundant installations of network devices

Redundant useof critical components such as fans and power supplies

Use of equipment with a high,measuredmean-time-between-failure (MTBF)

Product

Cisco CRS-1

8-Slot Single-Shelf System

Cisco 7604 Router

Cisco 7606 Router

Cisco ASR 1002 Router

Cisco ME 3400 Ethernet

Access Switch

Cisco Catalyst 3750

Metro Switch

Cisco IE 3000 Industrial

Ethernet Switch

EN 50121-4

Compliant

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Equipment Housing,

per EN 50125-3

Climate-controlled shelter

or building

Climate-controlled shelteror building


or building


or building


or building


or building

Cubicle or non-temperature-

controlled shelter

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The components of the Connected Signalling solution comply with the Europeanelectromagnetic compatibility requirements for railway applications in the signalling or

communications apparatus, EN50121-4, and are listed in the following table.


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Solution Overview

TheConnected Signallingarchitecture wasdeveloped tomeet the required technical performance

specification (Subset 041, Version2.1.0) to support theEuropean Rail TrafficManagement System

(ERTMS) and its two sub-systems, GSM-R and theEuropean Train Control System(ETCS). The

response times anddelay limits specified for ERTMS-ETCS are well within the limits of network

designs Cisco hasdelivered for other mission-critical andhigh-availability implementations, forexample, in utilities substation environments.

With the increasing availability of IP interfaces in interlockingsystems and trackside equipment such

as point heaters, traindetection systems, etc, from a variety ofmanufacturers, integrationof these

components in an IPMPLSnetwork is rapidly becoming easier and less complex.

Figure 1 shows how Cisco Connected Signalling components connect safety-critical components

(SIL 1 through 4) to the network, reliably making data available to central control centres.

Figure1 Connected Signalling Solution Example Architecture

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Because of its very high capacity and ability to segregate service types, the Connected Signalling

solution can support additional services such as video surveillance traffic, public address, and more

(Figure 2).

Figure 2 Additional Services Supported by the Connected Signalling Solution

Business BenefitsUpgrading the trackside fibre-optic network infrastructurewith theCisco Connected Signalling

solution enables railway infrastructure companies to, in effect, become virtual service providers.

Theupgradeallows for the continued, highly reliabledelivery of train control and signalling

communications across theentire network. In doing so, thesecompanies canachieve considerable

savings in operational expenses.

All of theworlds largest service providers have upgraded their fibre-optic networks fromSDHto an

IPMPLSdesign, in order to achieve such savings. A study from Infonetics Research indicates that 69

percent of the service providers surveyedexpect to achieve savings from11percent tomore than

50 percent in their operational expenses. The same study also indicates that55 percent of the

service providers will no longer invest in SDHtechnologies after 2010.

With the major buyers ofSDH equipment having decided that this technologyhas reached the end

of its usefulness, itmust be assumedthatcosts for spare parts andsupport for this equipmentwill

rise. This fact will adversely impact railway infrastructure companies whodelay theirmove toward an

all-IP architecture.

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Solution Overview

TheConnected Signalling solution alsoenables railway infrastructure companies to deliver

additional services to train operators, into stations, andeven to third parties, and thereby access

new sources of revenue.Most applications in stations have already adopted IP as the standard for

communications, with video surveillance andpublic address systems being notable examples.

Thecentralised viewing andmanagement of video surveillancematerial from all stations provides acompellingbusiness case to improve the security postureof stations.

A highly resilient IP network architecture enables railway infrastructure companies to change theway

they dobusiness.With their extensive, nationwide fibre-optic networks, they could alsodeliver new

value-added passenger information services that use rich media to train operators, or even offer

broadbandconnectivity to consumers.

Why Cisco?Ciscos leadership in IP networkingand20-year historyof successfully building high-availability,

carrier-gradenetworks for service providers worldwide make us an ideal choice for railway

infrastructure managers who want to upgrade their networks. Our consistently high customer

satisfaction ratings, coupledwith our architectural approach to addressing the specific needs ofrailway infrastructure companies, provide further justification forchoosing theCisco Connected

Signallingsolution.

Ideal for Railway Infrastructure CompaniesIP has become the new standard for connecting any and all devices to the network. The Cisco

ConnectedSignalling solution enables railway infrastructureoperators to upgrade the capacity of

their networks to a converged, highly resilient IP architecture that supports train control and

signalling applications as well as standardbusiness services like systemwide video surveillance

traffic and rich-media passenger-service applications.

Ciscos solutions allow you to utiliseyour current fibre-optic assets in a cost-effectivemanner to

deliver new revenue-generating services. Railway infrastructure companies canbenefit from Ciscosextensive experience in buildingmodern, high-capacity networks for service providers, and a range

of proven carrier-gradeproducts for your upgradeproject.

For More InformationFor further information, please contact your sales representative, or FelixGerdes,

[email protected], tel. +4940 3767 4404.

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solution overview brochure connected signalling

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