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This material describing Starhome is for general information purposes and may be modified by Starhome at anytime without notice. This material is the proprietary and/or confidential information of Starhome, and may not bedisclosed, copied or transferred to any third party without Starhome's prior express consent. Starhome, its logoand service names are registered trademarks or trademarks of Starhome GmbH. All other marks are the propertyof their respective holders.
© Copyright 2002-2007 Starhome. All rights reserved.
Local Roaming Number for Inbound
Product Description
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Product Description
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Important Notice This document is delivered subject to the following conditions and
restrictions:
* This document contains proprietary and/or confidential informationbelonging to Starhome.
* Any unauthorized reproduction (electronic or mechanical), use, ordisclosure of this material, or any part thereof, is strictly prohibited. Thecontents of this document or any part thereof may be used solely for thepurpose for which they are provided.
* This document is intended solely for the use of entities expresslyauthorized by Starhome.
* Material describing Starhome is for general information purposes andmay be modified by Starhome at any time without notice.
* The text and graphics are for the purpose of illustration and referenceonly. The specifications on which they are based are subject to changewithout notice.
* Corporate and individual names and data used in examples herein arefictitious unless otherwise noted.
* The information disclosed in this document is disclosed on an “as is”basis, and Starhome shall not be liable for the accuracy or completenessthereof.
* The system and the software described in this guide are furnished undera license and may be used or copied only in accordance with the terms of
this license.
Copyright ©2002-2007 Starhome. All rights reserved.
All company and brand products and service names are trademarks orregistered trademarks of their respective holders.
Document name
LRN for Inbound Product Description SHORT V500.doc
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Product Description
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Table of Contents
Glossary of Terms Used .....................................................................................................................4
1. Introduction – Service Overview...........................................................................................5
2. Service Background ..................................................................................................................5
2.1
The Challenge ..............................................................................................................................5
2.2
The Solution.................................................................................................................................5
2.2.1
Visited Operator Benefits ...........................................................................................6
2.2.2
VPMN Service benefits Home Operators ..................................................................6
2.2.3
Roamer Benefits ...........................................................................................................6
3.
Detailed Service Description..................................................................................................7
3.1
Connectivity .................................................................................................................................7
3.1.1
MSC interface ...............................................................................................................7
3.1.2
Probe Interface .............................................................................................................8
3.1.3
Provisioning Interface..................................................................................................8
3.2
Service Initial Stage – Service Activation.................................................................................8
1.1.1
Service Qualification Process .....................................................................................9
3.2.1
Service Announcement SMS ......................................................................................9
3.2.2
Out-of-Service Announcement SMS .......................................................................10
3.3
Mobile Terminated Call Flow ...................................................................................................10
3.3.1
Called Party dialed number Notification ................................................................10
3.4
Mobile Terminated SMS Flow..................................................................................................10
3.5
Mobile Originated Call Flow ....................................................................................................10
3.5.1
Mobile Originated Calls - from Home MSISDN .....................................................10
3.5.2
Mobile Originated Calls - from Local Roaming Number ......................................11
3.6
When Roamer is Not Connected to Network.........................................................................11
3.6.1
Release Call - Status of Local Roaming Number ..................................................11
3.7
Number Allocation Logic ..........................................................................................................11
3.7.1
Local Roaming Number Usage .................................................................................11
3.7.2
Local Roaming Number Lifecycle ............................................................................12
3.7.3
Required Amount of Local Roaming Numbers ......................................................13
3.7.4
End of Reservation Notification ...............................................................................13
3.8
Provisioning................................................................................................................................14
3.8.1
Provisioning for Customer Care ..............................................................................14
3.8.2
Customer Care User Interface .................................................................................15
3.8.3
Self Provisioning User Interface...............................................................................15
3.8.4
External Systems Provisioning Interface ...............................................................16
3.9
Communities..............................................................................................................................16
3.10
Service Reports ..........................................................................................................................16
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List of FiguresFigure 1: System Architecture.............................................................................................................7
Figure 2: Service Announcement SMS example ...............................................................................9
Glossary of Terms Used
Term Meaning
CAMEL Customized Application For Mobile Network Enhanced Logic
CLI Calling Line Identification
GMSC Gateway Mobile Services Switching Center
HLR Home Location Register
HPMN Home Public Mobile Network
IN Intelligent Network
INAP Intelligent Network Application Protocol
IMSI International Mobile Subscriber Identification
ISUP ISDN User Part
LRN Local Roaming Number
MO Mobile Originated (Call)
MSC Mobile Switch Controller
MSISDN Mobile Subscriber ISDN Number
MSRN Mobile Station Roaming Number
MT Mobile Terminated (Call)
SIM Subscriber Identity Module
SMSC Short Message Service Center
SOAP Simple Object Access Protocol
VLR Visitor Location Register
VPMN Visited Public Mobile Network
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1. Introduction – Service Overview
The Local Roaming Number (LRN) service enables VPMNs to provide a localnumber to their inbound roamers. Roamers can receive calls on both theirhome and new local number.
Frequent travelers pay premium rates for using their mobile phones whileroaming. To reduce their costs, they often purchase local prepaid SIM cardsand in this way can be reached at local call costs. This reduces mobileterminated (MT) costs and removes the burden of international call expensesfrom local contacts.
This situation causes travelers to:
* Carry 2 SIM cards or even 2 mobile handsets
* Replace the SIM in their mobile handset (if not SIM locked) - thus missingincoming calls on the inactive SIM.
The LRN service offers the benefits of having 2 numbers without the need topurchase a local prepaid SIM.
2. Service Background
2.1 The Challenge
Mobile phone users expect their roamingexperience to match their mobilelifestyles, with easy access to bothservices and people anywhere, anytime.Yet, dialing and receiving calls in visitednetworks is usually carried out atpremium rates.
The result is that roamers look forcheaper methods of using theirhandsets. Turning OFF the handset isone sure way to lower roaming expensesand rejecting incoming calls is another. Many roamers, traveling frequentlyto specific destinations, buy local prepaid cards for roaming in the visitedcountry. However, when they replace the SIM in their handsets, they becomeunavailable via their home network MSISDN, These roamers tend to utilizetwo handsets, in order to enable both numbers concurrently.
2.2 The Solution
Starhome’s Local Roaming Number™ service provides roamers with all thebenefits of having a local number without the drawbacks of purchasing anadditional SIM.
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Inbound roamers, upon registering in the operator’s network, aredynamically allocated a local number (MSISDN) to be associated with theroamer’s handset while roaming in the network. Roamers can receive calls
both on the original number and on the new local number (free calls).When originating calls, the roamer can select the CLI with which the call willbe identified with. The MO call can be identified with either the local roamingnumber itself or with the home CLI (MSISDN). By adding a prefix before thedestination number, the call is identified with the local roaming number,without the prefix (PBD), all MO calls are identified with the home MSISDN.
This feature enables the roamer to present a ‘local presence’ while he isroaming.
A smart usage-based mechanism reserves the local number for future visits.Alternatively, the pre-set expiration date can be extended via Customer Care.
Note: The service can be offered with the Winback notification service, to notify your
subscribers when they roam to other networks
2.2.1 Visited Operator Benefits
With the Local Roaming Number™ service, operators can offer better tariffsfor inbound roamers, which:
* Attract and retain inbound roamers
* Preserve roaming charges for MO calls
* Encourage more local network traffic
* Offer a competitive advantage in the local market, reducing churn
2.2.2 VPMN Service benefits Home OperatorsThe Local Roaming Number™ service will prevent roamers from removing thehome network SIM with the resulting lost revenue (no MT calls, SMS, GPRS,MMS, VAS, etc.). This service enables roamers to be available on their homeMSISDN and to enjoy all their familiar value added services.
2.2.3 Roamer Benefits
Both local and roaming subscribers will benefit from the following:
* Visitors save money when calling other roaming subscribers via their localMSISDN
* Provides “local presence” for frequent travelers by enabling them to bereached via a local number
* Roamers can make and receive calls via both the home and local numbers
* Avoids the need to separately purchase, maintain and pay for a localnumber
* The local number can be reserved for the roamer’s future visits
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3. Detailed Service Description
This section includes a technical description of the signaling flows for CallControl and SMS traffic, followed by a functional description of other productfeatures including Service Logic, Billing, Reports, Roamers Provisioning andService Counters.
3.1 Connectivity
Figure 1depicts the Local Roaming Number system architecture andinterfaces.
Figure 1: System Architecture
3.1.1 MSC in terface
The Local Roaming Number system, based on the IntelliGate Roaming ServiceDelivery Platform, can be integrated to the operator’s network via the GMSCin one of the following two ways:
* Service Node (ISUP)
* Service Control Function - Intelligent Network (IN)
Based on these two alternative signaling methods, Starhome has developed ageneric technical solution for this service. The final delivered solution <Issue
# from File Properties>must be adjusted to the specific network configuration
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and parameters including the network size and topology, the traffic volume,the INAP vendor’s variant, the CAMEL version - if relevant and the operator’spreferences. All these are usually discussed prior to specifying the final
technical solution. The two signaling options are described below.
3.1.1.1 ISUP
In particular cases, such as non-IN network environment and/or relativelylow inbound roaming traffic, call control is performed using ISUP signaling.
The IntelliGate is connected to the MSC, as call control does not requireconnecting the IntelliGate to the network via voice channels, SS7 signalinglinks are only used to convey the ISUP signaling. This inter-connection isachieved by utilizing a ‘Loop-Around’ technique on the MSC.
Loop-Around: With Loop-Around, every call requires two ports on the MSC. These ports are connected together (that is the loop) via a cable, to ensurethat there is always a voice path between them. The IntelliGate uses theISUP signaling to control the looped-around ports using standard ISUPmessages.
3.1.1.2 Intelligent Network
The IntelliGate controls MO and MT calls delivered to inbound roamersbased on IN architecture. This solution suits networks that are IN-readyand/or networks that experience relatively high inbound roaming traffic.
Using INAP, call control is performed with a combination of Trigger Detection
Points and Event Detection points.
3.1.2 Probe Interface
Using its SS7 Mobility Probe, the IntelliGate is connected to the operator’sinternational SCCP signaling links in a completely passive mode.
This interface is used to obtain the relevant roamer’s information and acts asa triggering point for service activation.
3.1.3 Provision ing Interface
The provisioning interface enables the operator to configure the behavior ofthe service, set roamers’ qualification rules and view basic service statusparameters
3.2 Service Initial Stage – Service Activation
The initial state of the service is responsible for the roamers’ registration andactivation process to the service. This stage includes the following activities:
* Monitoring roamer’s update location
* Obtaining subscriber information
* Service qualification process for each roamer
* Announcing service to roamers
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* Monitoring roamer’s cancel location and purge messages
1.1.1 Service Qualification Process
After the IntelliGate has detected a Location Update by an inbound roamer,the qualification process needs to decide whether the inbound roamer isentitled to the service.
The qualification process will decide if the roamer is allowed to originate andreceive calls on the local number by testing values in the MAP_ISD message.
3.2.1 Service Announcement SMS
Figure 2: Service Announcement SMS example
The Service Announcement SMS promotes the service to inbound roamersand supplies information about the service. An example of such an
announcement is presented below:
The following capabilities are configurable by the operator:
1. The announcement message can be delayed for a specified amount of timeafter registration to the visited network, values are provided in minutes.
2. The announcement supports multiple languages and provides automaticbest- match logic between the home country and the supportedlanguages, in cases of no match, a default language is activated.
3. The message can include parameter fields that can be replaced withactual values before sending the message such as:
* Local Roaming Number – the allocated LRN
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3.2.2 Out-of-Service Announcement SMS
The Out-of-Service Announcement SMS enables the operator to alertinbound roamers, who switched to another network (within the samecountry), about the loss of the Local Roaming Number™ service. The messagemay notify the roamers how to switch back to this visited network.
3.3 Mobile Terminated Call Flow
For Mobile-Terminated calls the roamer is available on both MSISDNs, thehome MSISDN and the Local Roaming Number.
Mobile-Terminated calls received on the home MSISDN shall start in thehome network thus charged as normal roaming MT call. On the other hand,calls received on the local MSISDN (Local Roaming Number) are started in
the visited network (like any other call to a local destination within thevisited network) and thus charged as a local MT within the network. In mostmobile networks (except in North America, Russia and other specificregions), local mobile terminated calls are free of charge.
3.3.1 Called Party dialed number Notif ication
The service allows B-Party to know if the caller has used B-Party’s LocalRoaming Number for this call or the home MSISDN prior to the call.
NOTE: This feature requires specific network capabilities in order to besupported
3.4 Mobi le Terminated SMS Flow
The service allows the roamer to receive SMS (Mobile Terminated SMS) onboth MSISDNs (home MSISDN and Local Roaming Number).
Mobile-Terminated SMS received on the home MSISDN is charged via regularroaming charges for MT SMS while roaming. No charges apply for Mobile-
Terminated SMS on the Local Roaming Number (in case no MT SMS chargesapply within the visited network).
3.5 Mobile Originated Call Flow
This section presents the call flow for mobile originated calls. The caller(inbound roamer) may choose the CLI to be used in the next call, by adding aprefix to the dialed number.
3.5.1 Mobile Orig inated Calls - from Home MSISDN
Mobile originated calls from the Home MSISDN have a regular MO call flowwith no changes. The call is first handled by the serving MSC and is thenrouted by the dialed number
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3.5.2 Mobile Originated Calls - from Local Roaming Number
Roamers may want to originate calls and to be identified via their Localroaming number. In order to present a “local CLI” to the called party,roamers may add a predefined prefix before the dialed number and the LocalRoaming Number service shall replace the original home MSISDN number inthe caller ID field to the new local roaming number. No changes to regularroaming charges are applied to this type of call.
3.6 When Roamer is Not Connected to Network
This section focuses on the service when an inbound roamer is notconnected to the visited network and the allocated number is in the“Reservation Period”. The various options outlined below will enhance boththe caller experience and the service to inbound roamers when absent.
3.6.1 Release Call - Status o f Local Roaming Number
The network can provide the caller with accurate notification about thestatus of the roamer with a local roaming number. If the network fails topage the roamer, the following will apply:
* During visit and reservation period, the service will release the call with a“subscriber is not available” notification release cause.
* During cooling period, the service will release the call with a “number isinvalid” notification release cause.
3.7 Number Allocation Logic
3.7.1 Local Roaming Number Usage
The system can define different logics (time thresholds) based on theroamer’s usage figures. The figures are calculated as average calls (both MOand MT) per “visit-day”.
If the local number wasn’t used even once, then both reservation and coolingperiod values are 0 (zero) and the number is immediately returned to thepool.
The calculation of usage upper value is based on the following formula:
* Accumulated Number of Calls: the accumulated figure of all callsreceived and originated with the local roaming number on all visits untilnow
* Accumulated Visit Period: the accumulated figure for the total numberof days of all previous visits until now
d VisitPerio
lls NumberOfCa
∑∑
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Type Usage upper
value
Reservation Period
(days)
Cooling Period
(days)
Send “end-of-
reservation”Notification
Newcomer 0-0.1 0 0 No
Minimal >0.1-1 60 45 No
Silver >1-5 60 60 No
Gold >5-10 90 60 Yes
Platinum >10 90 90 Yes
NOTE: The table includes sample values that are configurable via service
provisioning
3.7.2 Local Roaming Number Lifecycle
Roamers who have used the local roaming number will be entitled to longerreservation and cooling periods than roamers who haven’t used theirnumber at all.
As the allocation of local numbers is dynamic, the system may encounter lowavailability of local roaming numbers for allocation. In this case, thefollowing handling method is applied:
1. Yellow alarm will be triggered at 80% allocation
2. Red alarm will be triggered at 100% allocation
3. The system will start reusing numbers in “Cooling Period” from “oldest” to“newest”
4. After all numbers in “Cooling Period” have been reused – no new numberswill be allocated and assigned to arriving inbound roamers
3.7.2.1 Visit Period
The visit period is calculated from the first update location monitored withinthe visited network until expiration of “day after end-of-visit” parameter (seeSection 3.7.1).
3.7.2.2 Reservation Period
The reservation period is calculated from “end-of-visit” until the defined
period of time (in days) for the roamer’s type (see Section 3.7.1)
t
Visit Period
Number allocated
Reservation Period
until revisit
Cooling Period until
reallocation
Number
reallocated
Network Announcement:
“Subscriber Unavailable”
Network Announcement:
“Invalid Number”
Local Calls Divertedto Roamer
tt
Visit Period
Number allocated
Reservation Period
until revisit
Cooling Period until
reallocation
Number
reallocated
Network Announcement:
“Subscriber Unavailable”
Network Announcement:
“Invalid Number”
Local Calls Divertedto Roamer
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3.7.2.3 Cooling Period
The cooling period is calculated from the end of the reservation period untilthe defined period of time (in days) for the roamer’s type (see Section 3.7.1)
3.7.3 Required Amount of Local Roaming Numbers
This section explains how to calculate the required amount of local roamingnumbers in a network as a function of the number of inbound roamers:
Parameter Name Meaning
CIR Number of concurrent inbound roamers
AVD Average visit duration in days
DUE Days until end-of-visit – number of days since last update-location until the systemdecides that the roamer has ended the visit
ULR Used LRN rate – the percentage of roamer who have used (MO or MT) their Local
Roaming Number
RSP Reservation Period
CLP Cooling Period
Number of local roaming numbers for first visit periods:
( ) ( ) DUE AVD DUE CIR +×/
Number of allocated local roaming numbers for reservation and coolingperiods:
( )( ) ( )CLP RSPULR DUE CIR +××/
Total required Local Roaming Numbers:
( ) ( ) DUE AVD DUE CIR +×/ + ( )( ) ( )CLP RSPULR DUE CIR +××/
Below is a simplified example for the calculation of maximum allocation(all platinum roamers):
* CIR =10,000 concurrent roamers
* AVD = 4 days
* DUE = 2 days* ULR = 0.05 (5%)
* RSP = 90 days
* CLP = 90 days
( ) ( )244/10000 +× + ( )( ) ( )909005.04/10000 +××
= 37,500 local roaming numbers required
3.7.4 End of Reservation Notification
the operator sends an automated notification to a former inbound roamer
notifying about the reservation period expiration. The message may include
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instructions to call Customer Care and extend the reservation period orinstructions for self provisioning of the reservation period.
3.8 Provisioning
The service provisioning interface enables service configuration and selfprovisioning for inbound roamers.
3.8.1 Provision ing fo r Customer Care
This section presents the provisioning capabilities available to CustomerCare representatives
3.8.1.1 Local Roaming Number recovery
This function retrieves the last roaming number for a roamer.
The response returns details such as:
1. Last allocation date (or last date in-use)
2. The home MSISDN the number was last allocated to
3. Number current allocation status: in-use, reserved, cooling and free
4. Days until end of current status period (free=unlimited)
5. Number was used by roamer: Yes/No
3.8.1.2 Reservation Period Query This function retrieves the number of days until end of reservation period bythe roamer’s Home MSISDN or Local Roaming Number. The function alsoreturns the number of days in the cooling period for the roamer. Both values- reservation and cooling - are based on the roamer’s type (see Section 3.7.1)
3.8.1.3 Reservation Period Extension
This function enables Customer Care representatives to extend thereservation period for a roamer.
The extension values are provided in days. A (-1) value represents an
unlimited extension and this is effectively a permanent allocation of a localroaming number to an inbound roamer.
3.8.1.4 Exclusion of Roamer from Service
An inbound roamer may contact Customer Care and ask to be permanentlyexcluded from the service or for the current visit.
3.8.1.5 View List of Roamers Excluded from Service
This function provides a list of all the excluded-by-request roamers.
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3.8.1.6 Renew Local Roaming Number for Roamer
This function allocates a new local roaming number for a roamer throughthe home MSISDN.
This function can be used after a roamer has requested to be excluded fromthe service (remove the roamer from excluded list).
This function can be used when the roamer requests that the current localroaming number be replaced. The previous local roaming number, if used,starts a “Cooling period” before being returned to the available pool. If theprevious local roaming number was not used, then it can immediately bereturned to the available local roaming number pool.
3.8.2 Customer Care User Interface
This is a web-based interface that enables Customer Care personnel to
control the provisioning functions, (see Section 3.8.1).
3.8.2.1 Local Roaming Number Recovery
This function enables inbound roamers to recover the last local roamingnumber allocated for the home MSISDN.
3.8.2.2 Reservation Period Query
This function enables inbound roamers to query how many days are left fortheir reservation period.
NOTE: Roamers may query their reservation period from any network (not only fromthe VPMN)
3.8.3 Self Provision ing User Interface
This section presents the possibilities of self provisioning for the roamerwithout the need to contact the local Customer Care representatives.
This interface can be WAP or Web-based for self provisioning that will enableroamers to set all their settings.
The authentication is performed via a username (home MSISDN) andpassword login.
The password is provided, on-the-fly, via SMS to the home MSISDN.
The WAP user interface may be integrated into Starhome’s Roaming Mateservice for inbound roamers.
Note: Starhome can offer SMS and USSD interfaces for the self provisioninginterface to address market segments where these access methods aredeemed more acceptable.
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3.8.4 External Systems Provis ioning Interface
This is a Simple Object Access Protocol (SOAP) based interface that allowsconnectivity of the service to existing CRM systems and other provisioningsystems.
3.9 Communities
As the service is provided to inbound roamers, the system does not have anyprior information about the roamers. Inbound roamers are categorized intoautomatic communities by their roaming profile.
An example of such automatic communities may be: specific HPMNcommunity, CAMEL subscriber community, IMSI range community, etc.
3.10 Service Reports
The service accumulates traffic data and details that can be used to analyzethe service behavior and usage.
The data provided by the service supports generating reports like: usagereports by usage type (silver, gold, etc.) or distribution of usage betweenHPMNs, etc.