ETSI TS 103 418 V1.1.1 (2017-02)

ETSI TS 103 418 V1.1.1 (2017-02)






TECHNICAL SPECIFICATION
Railway Telecommunications (RT);
SMS to Railway numbering plan in roaming environment

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2 ETSI TS 103 418 V1.1.1 (2017-02)



Reference
DTS/RT-0042
Keywords
GSM-R, railways, SMS
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3 ETSI TS 103 418 V1.1.1 (2017-02)
Contents
Intellectual Property Rights . 4
Foreword . 4
Modal verbs terminology . 4
Introduction . 4
1 Scope . 5
2 References . 5
2.1 Normative references . 5
2.2 Informative references . 6
3 Definitions and abbreviations . 6
3.1 Definitions . 6
3.2 Abbreviations . 7
4 General description. 8
4.1 Requirements . 8
4.2 Reference architecture . 8
5 Functional concept . 9
5.1 Features and Signalling . 9
5.2 Addressing . 10
5.3 Location inquiry and routing . 10
5.4 Functionality of the SMS-SC . 10
5.4.1 SMS processing from foreign GSM-R subscribers . 10
5.4.2 Enhancements required for presentation of originating FN . 10
5.4.3 Delivery report . 10
5.5 Recording . 11
6 Protocol elements, Signalling and numbering plan translation . 11
6.1 USSD message format . 11
6.2 CAMEL SMS-MO information elements . 12
6.3 SMPP Protocol . 13
6.4 FN/MSISDN translation . 13
7 Scenarios and message flows . 13
7.1 Scenarios covered . 13
7.2 SMS FN to CT1 (Mobile Terminating) . 14
7.2.1 Message flow . 14
7.3 SMS FN to CT1 (Fix Terminating) . 16
7.3.1 Message flow . 16
7.4 SMS FN to all CT (except CT1 and CT5) . 18
7.4.1 Message flow - Terminating subscriber in visited network . 18
7.4.2 Message flow - Terminating subscriber in home network . 20
7.5 Dispatcher originated SMS. 21
7.5.1 Message flow . 21
7.6 Scenarios not covered . 22
Annex A (informative): Bibliography . 23
History . 24

ETSI

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4 ETSI TS 103 418 V1.1.1 (2017-02)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (https://ipr.etsi.org/).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Railway Telecommunications
(RT).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The operation of GSM-R networks comprises the support of Recommendation ITU-T E.164 [i.2] and the EIRENE
numbering plan. Latter one supports the identification of the subscriber based on functional number e.g. train number +
functional code. Only E.164 [i.2] numbering plan is applicable for interworking purposes between the GSM-R network
and other external telecommunication networks. The MSISDN, derived from Recommendation ITU-T E.164 [i.2]
numbering plan, is used to identify the subscriber for routing purposes inside and outside the GSM-R network. To
address the subscriber using both numbering plans simultaneously, mapping between the numbering plans is a standard
functionality of GSM-R networks.
The simultaneous operation of the numbering plans is applicable to voice, circuit switched data services and short
message service. Functional numbers as part of the EIRENE numbering plan can be used simultaneously in different
GSM-R networks. To distinguish between them, the international code "IC" is to be prepended to the national
functional number.
Short message exchange is a store and forward service provided by a Short Message Service Centre (SMS-SC) which is
linked to an E.164 [i.2] numbering plan identity. To enable the SMS exchange based on EIRENE numbering plan, the
numbering plan mapping entity needs to be aware about the alignment between the numbering plans on a subscriber
basis and if the subscriber is in the own network or abroad.
The case of operator network internal SMS exchange originated by own subscribers is already solved with a proprietary
SMS-SC - FFN integration. In the roaming case, a standardized information exchange is needed to align both
numbering plans e.g. functional number to MSISDN between the involved GSM-R networks.
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5 ETSI TS 103 418 V1.1.1 (2017-02)
1 Scope
The present document describes the message flows and the specific messages to be used between GSM-R networks to
enable numbering plan mapping functionality for the exchange of SMS.
In detail:
• Message flows covering the different call types using functional numbers as part of the EIRENE numbering
plan.
• Description of USSD Messages to allow the functional number/E.164 [i.2] mapping between the involved
GSM-R network entities.
• Description of the SMS address field content to allow presentation of the functional number or E.164 number
[i.2] to the terminating party.
Mapping of EIRENE/Recommendation ITU-T E.164 [i.2] numbering plans and the resolution of the functional number
that belongs to the subscribers located in the home network is out of scope of the present document.
NOTE: To minimize standardization and implementation effort, all protocols used to exchange the numbering
plan mapping information are standard 3GPP/ITU protocols and only specific settings are used for the
exchange of the relevant information.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 122 090 (V4.0.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Unstructured Supplementary Service
Data (USSD) - Stage 1 (3GPP TS 22.090 version 4.0.0 Release 4)".
[2] ETSI TS 123 090 (V4.0.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Unstructured Supplementary Service
Data (USSD) - Stage 2 (3GPP TS 23.090 version 4.0.0 Release 4)".
[3] ETSI TS 123 040 (V4.10.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Technical realization of Short Message Service
(SMS) (3GPP TS 23.040 version 4.10.0 Release 4)".
[4] ETSI TS 122 094 (V4.1.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Follow Me Service description; Stage 1
(3GPP TS 22.094 version 4.1.0 Release 4)".
[5] ETSI TS 123 094 (V4.0.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Follow-Me (FM); Stage 2
(3GPP TS 23.094 version 4.0.0 Release 4)".
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6 ETSI TS 103 418 V1.1.1 (2017-02)
[6] ETSI TS 123 078 (10.1.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Customized Applications for Mobile network
Enhanced Logic (CAMEL) Phase 4; Stage 2 (3GPP TS 23.078 version 10.1.0 Release 10)".
[7] ETSI TS 129 002 (4.18.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Mobile Application Part (MAP) specification
(3GPP TS 29.002 version 4.18.0 Release 4)".
[8] Recommendation ITU-T Q.704: "Signalling network functions and messages".
[9] Recommendation ITU-T Q.712: "Definition and function of Signalling connection control part
messages".
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] UIC Project EIRENE System Requirements Specification V16.0.
[i.2] Recommendation ITU-T E.164 (11/2010): "The international public telecommunication
numbering plan".
[i.3] ETSI TR 123 039 (4.0.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Interface protocols for the connection of
Short Message Service Centres (SMSCs) to Short Message Entities (SMEs) (3GPP TR 23.039
version 4.0.0 Release 4)".
3 Definitions and abbreviations
3.1 Definitions
For the purposes of the present document, the following terms and definitions apply:
call type: prefix (part of EIRENE Numbering plan in EIRENE SRS [i.1]) used to identify the User Number dialled
fixed network: network comprising the fixed terminal system and the dispatcher equipment
fixed terminal subsystem: part of the EIRENE [i.1] system that provides access to this network (and services) via
controller equipment (in general referred to as Fixed Terminals)
Follow Me Function Node: register that provides the mapping between the functional number(s) and the MSISDN of
the subscriber
functional addressing/numbering: process of addressing a call using a number representing the function a user is
performing, rather than a number identifying the user’s terminal equipment
functional number: full number used within the functional addressing scheme to contact an end user/system by
function or role
location dependent addressing: process of addressing a particular function (typically a controller) based on the current
location of the user (typically a train)
short dialling code: dialling code used to trigger the process of location dependent
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7 ETSI TS 103 418 V1.1.1 (2017-02)
3.2 Abbreviations
For the purposes of the present document, the following abbreviations apply:
CAMEL Customized Applications for Mobile network Enhanced Logic
CC Country Code
CGI Cell Global Identifier
CID Cell IDentity
CT Call Type
DN Destination Number
DP Detection Point
EIRENE European Integrated Radio Enhanced Network
FFN Follow Me function Node
FFN-A Follow Me Function Node-A
FFN-B Follow Me Function Node-B
FN Functional Number
FTS Fixed Terminal Subsystem
GPS Global Positioning System
GSM-R Global System Mobile Railway
HLR Home Location Register
HLR-A Home Location Register-A
HLR-B Home Location Register-B
IC International Code
IEBOC International EIRENE BreakOut Code
IMSI International Mobile Station Identifier
IP Internet Protocol
ISDN Integrated Services Digital Network Number
LAC Location Area Code
LDA Location Dependent Addressing
MAP Mobile Application Part
MCC Mobile Country Code
MNC Mobile Network Code
MO Mobile Originated
MS Mobile Station (user equipment)
MSC Mobile Switching Centre
MSISDN Mobile Station Integrated Services Digital Network Number
NDC National Destination Code
NEN National EIRENE Number
NI Network Initiated
NPI Numbering Plane Indicator
PDU Packet Data Unit
SC Service Center
SCCP Signalling Connection Control Part
SDC Short Dialling Code
SIM Subscriber Identity Module
SM Short Message
SME Short Message Entities
SMPP Short Message Peer to Peer
SMS Short Message Service
SMS-MO Short Message Service-Mobile Originated
SMS-SC Short Message Service - Service Centre
SN Subscriber Number
SRS System Requirement Specification
TON Type of Number
UMTS Universal Mobile Telecommunications System
USSD Unstructured Supplementary Service Data
VMSC Visited MSC
VMSC-A Visited MSC-A
VMSC-B Visited MSC-B
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8 ETSI TS 103 418 V1.1.1 (2017-02)
4 General description
4.1 Requirements
The following requirements shall be fulfilled:
1) Signalling System No.7 based protocol(s) for information exchange of functional number/MSISDN
association.
2) No need of additional standardization for Mobile Station functionality.
3) All specified SMS-message classes 0, 1, 2 and 3 shall be supported:
- Class 0: This type of SMS message is displayed on the mobile screen without being saved in the message
store or on the SIM card; unless explicitly saved by the mobile user.
- Class 1: The short message is to be stored in the device memory or the SIM card (depending on memory
availability).
4) Overwrite originator MSISDN by originator Functional Number to present Functional Number.
5) Provide SMS delivery status report and SMS delivery information.
6) SMS related information including Calling Functional Number, Called Functional Number, Calling-MSISDN,
Called-MSISDN are available for recording purposes (e.g. SMS CDRs).
7) FTS (e.g. Dispatcher/Controller) is able to originate or receive SMS by using standardized interfaces
e.g. IP/SMPP.
8) There are no restrictions regarding the use of R99 or R4 circuit switched core network environment.
Exception handling:
• If a SMS is addressed to an EIRENE Functional Number having no MSISDN association, SMS shall be
discarded.
• If a SMS is addressed to an invalid Functional Number, SMS shall be discarded.
• If the originating subscriber is not registered to a Functional Number, MSISDN of the SMS originator shall be
presented to the recipient of the SMS.
Limitation:
• The present document is only applicable for the use inside the circuit switched core network encompassing
3GPP Release 99 and 3GPP release 4.
• The present document provides the methodology of the numbering plan transformation while the message
content remains unchanged.
4.2 Reference architecture
Functional Number based SMS exchange reuses existing GSM-R network elements and their related functions. Figure 1
illustrates the applicable high level network architecture.
Interworking between GSM-R networks enables subscriber roaming and the exchange of SMS between subscribers.
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9 ETSI TS 103 418 V1.1.1 (2017-02)

Figure 1: General GSM-R network architecture for Functional Number based SMS interworking
5 Functional concept
5.1 Features and Signalling
The use of EIRENE numbering plan for SMS delivery when abroad refers to several features of existing ETSI
specifications. For the relevant features and the necessary signalling information to exchange information between the
GSM-R networks, the following specifications shall be applied:
• Unstructured Supplementary Service Data described in ETSI TS 122 090 [1] and ETSI TS 123 090 [2].
• Short Message Service described in ETSI TS 123 040 [3].
• Follow Me Service described in ETSI TS 122 094 [4] and ETSI TS 123 094 [5].
• CAMEL Phase 3 commands: initial DP "MO SMS" and corresponding responses "connect SMS" and "release
SMS" described in ETSI TS 123 078 [6].
• Mobile Application Part described in ETSI 129 002 [7].
• Signalling System No. 7 - Message transfer part described in Recommendation ITU-T Q.704 [8].
• Signalling System No. 7 - Signalling connection control part described in Recommendation ITU-T Q.712 [9].
• SMPP for SC to SME interface protocols described in ETSI TR 123 039 [i.3].
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10 ETSI TS 103 418 V1.1.1 (2017-02)
5.2 Addressing
Any exchange of short message is based on addressing the target subscriber using the associated MSISDN. The
SMS-Service Centre is used to receive the message, store it until the location of the target subscriber has been derived
and forward the message. SMS-SC addressing is based on E.164 [i.2] numbering plan, which is used by the subscriber
as SMS Service Centre address.
When using functional number to exchange SMS, Recommendation ITU-T E.164 [i.2] SMS-SC address is applicable.
To be able to route the SMS towards the recipient, the present functional number shall be resolved into the applicable
MSISDN - Recommendation ITU-T E.164 [i.2] number format.
5.3 Location inquiry and routing
Routing and addressing within and between GSM-R Core Networks shall comprise E.164 [i.2] number format. The
EIRENE functional numbering scheme is reused in every GSM-R network. To distinct between the functional
number(s) and the associated MSISDN, the international code as part of the EIRENE numbering plan shall be always
prepended to the functional number.
The SMS processing shall be determined by the functional registration status of the SMS-recipient. Based on the
international code as part of EIRENE numbering plan, the processing SMS-SC shall be identified. In case IC is absent,
the SMS-SC address of the network the originator is attached shall be used. The visited MSC/MSC-Server shall inquire
the applicable SMS-SC E.164 [i.2] address from the FFN of the SMS-originator. If the SMS originator FFN is unaware
about the registration status of the SMS recipient, it shall determine the registration status of the SMS recipient by
inquiring the recipient FFN. To identify the applicable FFN, the international code of the SMS recipient functional
number shall be used. In case IC is absent, the FFN of the network the originator of the SMS is attached shall be
interrogated. The FFN response shall contain the association between Recommendation ITU-T E.164 [i.2] and EIRENE
numbering plan of the SMS recipient in international numbering format. Based on the SMS recipient network
registration status, the SMS shall be forwarded by the visited MSC/MSC-Server to the applicable recipient SMS-SC for
further processing.
5.4 Functionality of the SMS-SC
5.4.1 SMS processing from foreign GSM-R subscribers
In order to allow the redirection of SMS to the SMS-SC of the visited network, the SMS-SC of the visited network shall
accept mobile originated SMS of roaming subscribers.
NOTE: To prevent unauthorized usage of the SMS service, an SMS-SC normally only accepts mobile originated
SMS of home subscribers.
5.4.2 Enhancements required for presentation of originating FN
The presentation of Functional Number is not intended for SMS. To provide this functionality without modifications of
the Mobile/Cab Radio, the field "Origination Address" shall be used to inform about the originating functional number.
As a consequence of overwriting, the MSISDN of the originator is not available to the recipient of the SMS. To ensure
that SMS originator functional number can be properly used e.g. reply SMS, the following format shall be applied:
• NPI: Recommendation ITU-T E.164 [i.2].
• TON: Unknown.
• Digits: .
5.4.3 Delivery report
If required, the delivery report shall be sent back to the originator of the SMS. To present the SMS originator functional
number to the recipient of the SMS, the MSISDN of the SMS originator was replaced by the functional number. To
route the SMS delivery report, the SMS-SC shall recognize about the initial MSISDN of the SMS originator or shall
interrogate the MSISDN of the SMS originator from FFN.
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11 ETSI TS 103 418 V1.1.1 (2017-02)
5.5 Recording
All information required for the recording are available at the SMS-SC of the terminating network. SMS recording will
be done on the Voice/SMS Recording system associated with that SMS-SC. The recording interface itself is out of
scope of the present document.
6 Protocol elements, Signalling and numbering plan
translation
6.1 USSD message format
Network initiated USSD as defined in ETSI TS 122 090 [1] and ETSI TS 123 090 [2] shall be used to exchange the
numbering plan association between the home-FFN and the local-FFN. In particular, UnstructuredSSRequest
(Op Code 60) shall be used for the MAP USSD information exchange. SCCP Called Party Address and the
destinationReference in map-open shall contain the GT-address of the visited FFN. SCCP Calling Party Address and the
originationReference in map-open shall contain the GT-address of the home FFN.
For the resolution of Short Dialing Code (SDC - CT-1 EIRENE numbering plan), the MAP based USSD information
exchange shall contain Cell Global Identifier (CGI) information of the visited GSM-R network.
USSD Request:
USSD Data Coding Scheme:
• The Alphabet indicator shall be set to "SMS Default Alphabet".
• Language indicator shall contain "language unspecified".
Content of the USSD String in the EIRENE numbering plan according to EIRENE SRS [i.1] resolution request:
1) operation code "*#";
2) SC for Follow Me service "214";
3) "*" character;
4) functional number (EIRENE numbering plan international format, CT-1 SDC only);
5) to support FN as well as DN queries, the indication "FN:/DN:" is added:
a) FN:digits/DN:digits: Following format shall be applied:
i) If CT-1   FN:< SDC>
ii) If CT-2, 3, 4, 5, 6, 7, 9 FN:
iii) If CT-8   DN:
6) "*" character;
7) "*" character;
8) "*" character;
9) tag "CGI" to indicate location information applying the following format: MCC,MNC,LAC,CID all in
hexadecimal format separated by "," character. The hexadecimal digits A-F shall only be used in upperc
...