04/22/23 1

04/22/23 2

GSM roaming brokerage allows

integration of Carribean’s fragmented

mobile markets

CANTO Congress St. Kitts & Nevis, 21.06.2005

22/04/23 2

04/22/23 3

Roaming traffic scenario (voice)

Bilateral Roaming Agreement (IRA)

HLR

SMSC

MSC

GW MSC

STPSTP

SS7(MAP)

VLR

SMSC

MSC

GW MSC

SwitchSwitch

HPMN VPMN

Voice(ISUP)

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PMN PMNBuying / Selling

Layers of the roaming businessC

om

mer

cial

En

ablin

gT

ran

spo

rt ISUP

IP

Voice Voice

GRX GRX

Roaming Coordination

SS7 (MAP)

Roaming Coordination

TAP / RAP

Invoicing/Settlement

Signalling

Clearing(DC/FC)

Signalling

Clearing(DC/FC)

Contracting, activation & administration

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List of activities

Establish SS7 Links

Perform IREG Tests

Data in Test MSCData in Billing system

Register VPLMN SIMIREG completion certificate

Generate TAP Testfile

Perform incoming TAP

Validation incoming TAPSending Test SIM‘s

Control SS7 LinksProduce IO invoice

Check out-going TAPRAP File

Fraud Control

04/22/23 6

Spaghetti roaming

Signalling

Co

sts

PMN A

Clearing

Roaming Coordination

PMN B PMN C

04/22/23 7

Roaming efforts & costs increasing in two dimensions

Voice Roaming

Early 90ties

20-40

Mid 90ties

50-100

2002

~400

End 90ties

100-200

Around2000

~300

Today

~500Number of

GSM Networks

SMS Roaming

Prepaid Roaming

GPRS roaming

SMS Interworking

Tomorrow

~700-1000

MMS roaming/ IW

3G roaming/ IW

Roaming Service Features

The actual GSM Roaming framework is elaborated by dominant operators, based on high traffic projections. Small networks and GSM-newcomers must be selective, or find innovative solutions.

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The goals of the GSMA RB TF (Roaming Broker Task Force)

Key2roam

04/22/23 9

GSMA Roaming Broker Task Force – guidelines

“Roaming broker guidelines “ issued August 2001

•“Definition: A ‘Roaming Broker’ is an entity, which enables a mobile network operators subscribers to roam on one or more mobile networks where the mobile network operators have no direct contractual.”•“Obligations of a Roaming Broker: The following guidelines describe the obligations of a ‘Roaming Broker’ in different fields of operation towards the standard GSM operators.”

HomeNetwork

RoamingBroker

VisitedNetwork

Contract(Roaming Agreement)

Contract(Roaming Agreement)

Signalling Signalling

IOT(Billing)

IOT(Billing)

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The concept of the automatic signalling testing

SIM-Cards of Community Members

Customers Network

ComfoneComfone Internet

SIM-Card Server

GSM850 / 900 / 1800 / 1900

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ComfoneKey2roam

MGTPMN Code

ISPC

41 799CHERB2-061-62-061-7

Signalling Flow scheme of Key2roam – General Layout

MCC MNCMGT

PMN Code

123 0272 76

ABCK9

MCC MNCMGT

PMN Code

321 0152 44

XYZK9

MSC

GT routing tableconfiguration:

321 01 41 799DPC 2-061-6

Broker agreement Broker agreement

MSC

GT routing tableconfiguration:

123 02 41 799DPC 2-061-6

SignallingSignalling

PMNPMN

04/22/23 12

ComfoneKey2roam

TDIRQATLIEK900001

Sender

Recipient

TAP Flow scheme of Key2roam – General Layout

H’PMNLIEK9

DCH

Inc.TAPFiles

Conv.& Clearing

Process

TDIRQK9LIEVE00001

Sender

Recipient

V’PMNIRQK9

DCH

Outg.TAPFiles

VPMN

Atheer, Irak

PMN code: IRQATBroker code: IRQK9

DCH

HPMN

Orange Liechtenstein

PMN code: LIEVEBroker code: LIEK9

DCH

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Roaming Broker Invoicing Example

Inter PMN invoice -grouped or ungrouped

PMN XA 100B 50C 20

PMN YA 200B 30

Inter PMN invoice -grouped

Clearing

Clearing

Clearing

ComfoneKey2roam

PMN A

BC

PMN X

YZ

C 45PMN ZPMN C

PMN B

PMN A

A

IOT

Comfone IOT = 300

B

IOT

Comfone IOT = 80

C

IOT

Comfone IOT = 65

A B C

IOT

IOT = 170

A

BIOT

IOT

IOT = 230

C

IOT

IOT = 45

04/22/23 14

Standard lead time for activation of Key2roam relations

ID Task Name DurationWeek

72 653 4 8 9

1 0dDecision to establish Key2roam

2 20dExecution of the Key2roam Service Agreement and its Annexes

3 0dKey2roam Service Agreement and its Annexes signed

4 0dSignalling, DC and FC operational

5 10dSet up Network and Billing System

6 5dOne-time IREG- and TADIG Tests

7 0dKey2roam enabled

8 0dKey2roam Test Unit operational

9 10dActivation of Key2roam Relations

10 0dKey2roam Relations operational

1

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Thank you for your attention !

For further information on the topic:

Helmut BösigerSales Director Latin AmericaAv. Niemeyer 915-1401 Rio de JaneiroTel: +55 21 3204 6866Fax: +55 21 3204 6914Mobile: +55 21 8855 6866Mobile: +41 79 788 11 18helmut.boesiger@comfone.com

Or

Sales & Sales Support Team:

Tel: +41 31 341 1172Fax: +41 31 341 1011sales.support@comfone.com