ETSI ETS 300 524 ed.1 (1994-09)

European digital cellular telecommunications system (Phase 2); Signalling requirements relating to routeing of calls to mobile subscribers (GSM 03.04)

DE/SMG-030304P

Evropski digitalni celični telekomunikacijski sistem (faza 2) – Signalizacijske zahteve za usmerjanje klicev k mobilnim naročnikom (GSM 03.04)

General Information

• Status: Published
• Publication Date: 12-Sep-1994
• Technical Committee: SMG 3 - Network Aspects
• Current Stage: 12 - Completion
• Due Date: 03-Oct-1994
• Completion Date: 13-Sep-1994
• Ref Project: SIST ETS 300 524 E1:2003 - European digital cellular telecommunications system (Phase 2); Signalling requirements relating to routeing of calls to mobile subscribers (GSM 03.04)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.LJQDOL]DFLMVNHEuropean digital cellular telecommunications system (Phase 2); Signalling requirements relating to routeing of calls to mobile subscribers (GSM 03.04)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:ETS 300 524 Edition 1SIST ETS 300 524 E1:2003en01-december-2003SIST ETS 300 524 E1:2003SLOVENSKI
STANDARD



SIST ETS 300 524 E1:2003



EUROPEANETS 300 524TELECOMMUNICATIONSeptember 1994STANDARDSource: ETSI TC-SMGReference: GSM 03.04ICS:33.060.30Key words:European digital cellular telecommunications system, Global System for Mobile communications(GSM)European digital cellular telecommunications system (Phase 2);Signalling requirements relating to routeing of callsto mobile subscribers(GSM 03.04)ETSIEuropean Telecommunications Standards InstituteETSI SecretariatPostal address: F-06921 Sophia Antipolis CEDEX - FRANCEOffice address: 650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCEX.400: c=fr, a=atlas, p=etsi, s=secretariat - Internet: [e-mail].: [phone] - Fax: [phone]Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and theforegoing restriction extend to reproduction in all media.© European Telecommunications Standards Institute 1994. All rights reserved.SIST ETS 300 524 E1:2003



Page 2ETS 300 524: September 1994 (GSM 03.04 version 4.0.4)ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄWhilst every care has been taken in the preparation and publication of this document, errors in content,typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to"ETSI Editing and Standards Approval Dept." at the address shown on the title page.SIST ETS 300 524 E1:2003



Page 3ETS 300 524:1994 (GSM 03.04 version 4.0.4)ContentsForeword.51Scope.72Normative references.73Definitions and abbreviations.74General routeing rules.75Routeing of a call from a subscriber served by the HPLMN.86Routeing of a call from a subscriber in the same country as the HPLMN but not served by theHPLMN.96.1Interrogation by a Gateway MSC.96.2Interrogation by the Originating LE.117Routeing of a call from a subscriber in a different country from the HPLMN.137.1Interrogation by a Gateway MSC.137.2Interrogation by the Incoming ISC in the Destination Country.167.3Interrogation by the Outgoing ISC in the Originating Country.188Impact of supplementary services.198.1Call Forwarding.198.2Closed User Group.208.3Barring of Incoming Calls.208.4Supplementary Service Incompatibility.209Unsuccessful call setup.209.1Roaming Not Allowed.209.2VPLMN Cannot Support The Required Service.209.3HLR Restart.20History.21SIST ETS 300 524 E1:2003



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Page 5ETS 300 524:1994 (GSM 03.04 version 4.0.4)ForewordThis European Telecommunication Standard (ETS) has been produced by the Special Mobile Group(SMG) Technical Committee (TC) of the European Telecommunications Standards Institute (ETSI).This ETS defines the Signalling requirements relating to routeing of calls to mobile subscribers within theEuropean digital cellular telecommunications system (Phase 2). This ETS corresponds to GSM TechnicalSpecification (GSM-TS) GSM 03.04 version 4.0.4The specification from which this ETS has been derived was originally based on CEPT documentation,hence the presentation of this ETS may not be entirely in accordance with the ETSI/PNE rules.Reference is made within this ETS to GSM-TSs (NOTE).NOTE:TC-SMG has produced documents which give the technical specifications for theimplementation of the European digital cellular telecommunications system.Historically, these documents have been identified as
GSM Technical Specifications(GSM-TSs). These TSs may have subsequently become I-ETSs (Phase 1), or ETSs(Phase 2), whilst others may become ETSI Technical Reports (ETRs). GSM-TSs are,for editorial reasons, still referred to in GSM ETSs.SIST ETS 300 524 E1:2003



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Page 7ETS 300 524:1994 (GSM 03.04 version 4.0.4)1ScopeWhen a subscriber wants to call a mobile station (MS), the network needs to know the location of thecalled MS in order to route the call to the appropriate Mobile Services Switching Centre (MSC) - seeTechnical Specification GSM 03.12 on location registration. This document describes how the routeingprocess can be performed, and considers the effect on the routeing process of the capabilities of theexchanges involved.This document assumes that the Mobile Station ISDN Number includes a specific National DestinationCode which identifies the Home PLMN (HPLMN) of the called MS (referred to below as 'the HPLMN'). Ifthe numbering plan for MSs is fully integrated into the fixed network numbering plan, the method ofrouteing may be different.In the diagrams in section 6, the originating local exchange is shown as being part of an ISDN. The samerouteing principles apply if the originating local exchange is part of a PSTN.Short Messages are routed in the same way as circuit-switched calls; the SMS Gateway MSC must beable to interrogate the HLR of the MS for which the short message is intended, in order to route the shortmessage to the visited MSC.2Normative referencesThis ETS incorporates by dated and undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this ETS only when incorporated in it by amendment or revision. For undated references, thelatest edition of the publication referred to applies.[1]GSM 01.04 (ETR 100): "European digital cellular telecommunication system(Phase 2); Abreviations and acronyms".[2]GSM 03.07 (prETS 300 525): "European digital cellular telecommunicationsystem (Phase 2); Restoration procedures".[3]GSM 03.12 (prETS 300 530): "European digital cellular telecommunicationsystem (Phase 2); Location registration procedures".[4]GSM 09.02 (prETS 300 599): "European digital cellular telecommunicationsystem (Phase 2); Mobile Application Part (MAP) specification".3Definitions and abbreviationsAbbreviations used in this specification are listed in GSM 01.04.4General routeing rulesThe number dialled by the calling subscriber contains no indication of the location of the called MS. Inorder to route the call to the MS the network must be aware of the location of the MS and the routeingaddress to be used. The routeing address is the Mobile Station Roaming Number (MSRN); the onlynetwork entity which can provide the MSRN is the Home Location Register (HLR) of the HPLMN, hence inorder to route the call to the visited MSC (VMSC) where the called MS is located it is necessary tointerrogate the HLR.The preferred arrangement for interrogation of the HLR is to direct the call to a Gateway MSC (GMSC)which is part of the HPLMN. This simplifies the process of charging the called subscriber correctly if thecall has to be re-routed because the called MS has roamed to a different PLMN or if the call has to beforwarded.SIST ETS 300 524 E1:2003



Page 8ETS 300 524:1994 (GSM 03.04 version 4.0.4)The consequence of this is that the preferred signalling procedure is as follows:i)When a subscriber wants to call an MS he dials the MSISDN of the called MS.ii)The originating local exchange (LE), or a transit exchange, analyses the dialled number andrecognises the NDC which identifies the HPLMN. If the calling subscriber is in a different countryfrom the called MS, this analysis will in general not be performed by the originating LE; when theinternational prefix is recognised, the call is routed to an outgoing International Switching Centre(ISC) without any further analysis, and the incoming ISC in the destination country recognises theNDC of the HPLMN.iii)The call is directed to a GMSC in the HPLMN. The GMSC interrogates the HLR, which returns theMSRN for the called MS. The HLR obtains the MSRN by interrogating the VLR where the called MSis currently registered. This procedure uses the Mobile Application Part of Signalling System CCITTNo 7 - see Technical Specification GSM 09.02.iv)The GMSC uses the MSRN to route the call to the VMSC.Section 5 describes the routeing of a call from a subscriber served by the HPLMN.Section 6 describes the routeing of a call from a subscriber in the same coun
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