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Technology Overview

It is common for Railway companies

to deploy and manage their own

communication networks to facilitate

communications between personnel

on board the trains, personnel at train

stations, and for personnel working

along the railway (e.g. shunting teams).

These networks are also used to monitor

and report on the positions of the

trains at all times, and if necessary, to

help manage critical events to keep

operations running smoothly.

A well-adopted approach for Railway

communications is to deploy a GSM

network, where signaling protocol

stacks are customized so that special

needs can be managed. This technology

is typically referred to as GSM-Railways

(GSM-R). A GSM-R network is designed

to provide several applications such as

communications for automatic train

control, communications to and from

the train engineer, communications

between shunting teams and emergency

communications within an area.

SUNRISE TELECOM

GSM-R Network MonitoringAnalysis Suite for GSM-Railways

Application Notes

Sunrise Telecom

GSM-R Monitoring

Platform Solutions

GSM-R also has the potential to add

another revenue source for Railways by

allowing passengers to use the network

during the journey and at the train

stations, much in the same way that

airlines do today.

The Challenge

The most important requirement for

GSM-R networks is that they operate

at 100% availability and at a very

high quality level, as real-time train

operations and train emergencies must

be managed very rapidly.

Another complication lies in GSM-

Rs ability to place group calls. This

‘walkie-talkie’ function allows for

broadcast communications or group

communications, and since the system

only permits one person to talk at a

time (while the others in the group are

forced to listen), call priority must be

carefully managed. Finally, a Railway

network must provide location service

to determine the exact position of

personnel with handsets at any time.

3GMaster

� GSM-R Network Monitor ing

The Sunrise Telecom Solution

Sunrise Telecom has developed a comprehensive set of non-

intrusive analysis and monitoring suites for GSM, GPRS/

EDGE, CDMA, UMTS and IMS/MMD Networks.

The current hardware platforms that support GSM-R moni-

toring are:

• 3GMaster® 1000-DX, 6000-QX, and 9000-QX

GSM-R Monitoring - Results

The GSM-R package provides a unique set of results in real-

time, including:

Trace

All protocol events are decoded in real time as easy-to-

understand mnemonic messages. Frames can be viewed in

Compact, Expanded and Hexadecimal mode and customized

and viewed in a Graphical format (Arrow Diagram).

Call Detail Record

CDRs are provided for each call generated and/or received.

The CDR-to-Frame function automatically recovers all the

related signaling frames and shows the entire call flow in a

graphical format; while the Frame-to-CDR function auto-

matically recovers the CDR related to a selected signaling

message.

Statistics

A complete set of statistics (in tabular and graphical for-

mat) covers all the main protocol events:

• Signaling messages: a statistic is provided for every sig-

naling protocol stack

• Calls: statistics provide information on how many calls/

sessions were originated, terminated, handed, successful

or failed.

• Reasons for disconnect: several statistics show why calls

or sessions were unsuccessful.

Statistics can be saved in HTML, XML and Text-ASCII format

and exported to commercial applications.

Charts

Every statistic is accompanied by its own chart. These charts

can be customized to modify their formatting, and can also

be exported to commercial applications.

Key Features

Multi-protocol & Multi-interface Monitoring

The typical interfaces/protocols involved in a GSM-R en-

vironment are GSM-A, GSM-Abis and ISDN. The system is

able to perform simultaneous monitoring of all interfaces

even if different physical interfaces are involved.

Correlation

‘Group’ calls may involve personnel located across the

entire geography of the train system (e.g. at train stations,

at shunting sites or on board the train where frequent cell

transitions occur). Therefore it is crucial to have an end-to-

end view of the signaling messages exchanged to open the

transmission channels.

The Sunrise solution is able to automatically correlate the

CDRs/TDRs from all of the interfaces under monitor. A

single CDR/TDR is generated with its

own Arrow Diagram so the User can

see all devices involved and which

signaling messages were exchanged,

providing an end-to-end call view.

Statistics & Charts

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Audio Recording Capability: The Unit as a “Black Box”

The Audio Recording function allows the operator to listen

and store the voice signal in .wav files. Audio files are

simply linked to the CDR and can be played with Media

Player. In this way the unit may act as a “Black Box”, able

to keep track of the conversations among personnel during

particular or crucial events. The supported codecs for audio

are: ITU G.711, G.7�9, G7�9a and G.7�3.1.

Analysis Tools:

Filters and Triggers

Filters are available for both Trace and CDRs. Any number

of filters with multiple conditions can be set. Triggers allow

the creation of an advanced trap system that combines

protocol events, counters and timers. Triggers are based on

a Graphical Editor.

Call Tracing

Allows messages related to a specific call to be seen by set-

ting the Called/Calling numbers or IP addresses. A dedicated

real-time trace shows only the frames that match the call.

Applications

The GSM-R package has many applications for Service Pro-

viders, Service Integrators and Railways:

• Maintenance and troubleshooting

• Network traffic analysis

• Network planning and deployment analysis

• Voice recording

Supported Protocols

• GSM-R

- Advanced Speech Call Items (ASCI)

- Voice Group Call Service (VGCS)

- Voice Broadcast Service (VBS)

- Enhanced Multilevel Precedence and Pre-emption

(EMLPP)

- Location Services

• GSM-Abis and Proprietary O&M

• GSM-A

• GSM MAP

• ISDN

• ISUP

Arrow Diagram of a Correlated CDR

© �006 Sunrise Telecom Incorporated. All rights reserved. Specifications subject to change without notice. All product and company names are trademarks of their respective corporations.

Sunrise Telecom San Jose, Modena, and Taiwan facilities are ISO 9001 certified. Do not reproduce, redistribute, or repost without written permission from Sunrise Telecom. REV.�0� July �008

For more information or a directory of sales offices: pre-sales.support@sunrisetelecom.it www.sunrisetelecom.com

Ordering Information

Suites

3GMasterPart Number

Details

3GM-GSM Analysis Suite for GSM phase 2 and 2,5 - updated up to Release 5. Includes complete analysis support for GSM-R ASCI (Advanced Speech Call Items) extensions

3GM-3GPP-GERAN

3GPP GERAN Access Network bundle (Abis, GSM, EDGE, GERAN) updated up to Release 5. Includes complete analysis support for GSM-R ASCI (Advanced Speech Call Items) extensions.

Optional Protocol Packages

3GMasterPart Number

Details

OPT-ISDN Analysis Package for ITU Q.921/931, ETSI EDSS1, Bellcore National 2, and Lucent 4ESS

OPT-MULTI-TRACE

Multiple CDR correlation system to show a call though different protocols and inter-faces over a single screen

OPT-AUDIO-MON

This Feature enables the audio recording and Listening. G.711 codec is included. Others codec support must be purchased separately

OPT-AUDIO-G7231

G.723.1 Codec support

OPT-AUDIO-G729A

G.729 and G.729 Annex A Codec support

OPT-AUDIO-G729B

G.729Annex B Codec suppor

OPT-AUDIO-AMRNB

AMR Narrow Band Codec support

All other Suites, Protocol Packages, Options & Accessories:

Please contact your local Distributor or Sales Representative.