SIST EN 300 523 V4.10.1:2003

• Abstract:

  Upgrade to Edition 3. CR from CN#7

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 33.070.50 - Global System for Mobile Communication (GSM)
• Technical Committee: SS EIT - Technical Board for the electrotechnical, information technology and telecommunications fields
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: ETSI EN 300 523 V4.10.0 (2000-07) - European digital cellular telecommunications system (Phase 2); Numbering, addressing and identification (GSM 03.03 version 4.10.1)

SIST EN 300 523 V4.10.1:2003 is the Slovenian adoption of ETSI EN 300 523 Version 4.10.1, also known as GSM 03.03 version 4.10.1. It specifies the numbering, addressing and identification plans used in the GSM Phase 2 system, for subscribers, mobile stations, location areas, base stations, network entities and equipment identities.

What does SIST EN 300 523 V4.10.1:2003 specify?

SIST EN 300 523 V4.10.1:2003 defines the GSM plans and principles for numbering, addressing and identification. In practice, it tells operators and manufacturers how identities are structured and allocated so that subscribers, devices and network elements can be routed, recognized and managed consistently.

The document is organized into six main clauses plus one informative annex:

Annex	What it covers
Annex A	Colour codes, especially use and planning of the BSIC

The scope covers:

• subscriber identities in the GSM system
• telephone and ISDN numbers for mobile stations
• roaming numbers for visiting mobile stations
• location area and base station identification
• identification of MSCs and location registers
• international mobile equipment identity and software version number
• regional subscription zones

What are the key requirements of SIST EN 300 523 V4.10.1:2003?

SIST EN 300 523 V4.10.1:2003 sets out the core identity structures used in GSM, and those structures matter because they determine how networks route calls, locate subscribers and distinguish equipment.

Subscriber identity

Clause 2 states that each mobile subscriber shall have a unique International Mobile Subscriber Identity (IMSI). The IMSI is built from the Mobile Country Code (MCC), Mobile Network Code (MNC) and Mobile Subscriber Identification Number (MSIN). In practice, this is the permanent subscriber identity used across the GSM system.

Clause 2 also defines the Temporary Mobile Subscriber Identity (TMSI) and Local Mobile Station Identity (LMSI). The TMSI is local to the Visitor Location Register (VLR) area and is allocated in ciphered form for confidentiality; the LMSI is a 4-octet helper identity used to speed subscriber-data search. This lets the network reduce exposure of the IMSI while still finding subscriber records efficiently.

Numbering for mobile stations

Clause 3 defines the numbering plan for mobile stations. The Mobile Station International ISDN Number (MSISDN) is taken from the E.164 numbering plan, and the Mobile Station Roaming Number (MSRN) is used temporarily to route calls to a visited mobile station. This is the basis for dialling a mobile station and for network routing during roaming.

Clause 3 also notes that the Mobile Station International Data Number follows the X.121 data numbering plan, and that the Handover Number is used to establish a circuit between MSCs for an ongoing call. For operators, this means voice, data and handover routing use different number roles.

Location and base-station identity

Clause 4 defines the Location Area Identification (LAI), Cell Identity (CI), Cell Global Identification (CGI), Base Station Identity Code (BSIC), Regional Subscription Zone Identity (RSZI) and Location Number. These identities let the network identify where a mobile is attached, which cell it is in and whether roaming is allowed in a given zone. The BSIC is the local colour code used to distinguish neighbouring cells, which is important for frequency planning and handover decisions.

Network and equipment identity

Clause 5 identifies MSCs and location registers using international PSTN/ISDN numbers and/or signalling point codes. It also allows HLR identification for HLR restoration by leading digits of the IMSI. Clause 6 defines the IMEI and IMEISV structures for mobile equipment. The IMEI and IMEISV use decimal-only fields, and the IMEISV adds a Software Version Number (SVN) so equipment can be identified together with its software version.

What terms does SIST EN 300 523 V4.10.1:2003 define?

• International Mobile Subscriber Identity (IMSI) - The permanent unique identity of a mobile subscriber in GSM.
• Temporary Mobile Subscriber Identity (TMSI) - A locally meaningful temporary identity used by the VLR to protect subscriber confidentiality.
• Local Mobile Station Identity (LMSI) - A 4-octet auxiliary identity used to speed subscriber-data retrieval.
• Location Area Identification (LAI) - The code that identifies a location area within a GSM PLMN.
• Base Station Identity Code (BSIC) - The local colour code that helps a mobile distinguish neighbouring base stations.
• Mobile Station Roaming Number (MSRN) - A temporary routing number used to direct calls to a roaming mobile station.
• International Mobile Station Equipment Identity (IMEI) - The unique decimal identity of the mobile equipment.
• International Mobile Station Equipment Identity and Software Version Number (IMEISV) - The IMEI structure extended with a Software Version Number.

Who uses SIST EN 300 523 V4.10.1:2003?

SIST EN 300 523 V4.10.1:2003 is used by GSM network operators, planners and equipment manufacturers. It is relevant to organisations handling subscriber databases, VLR, HLR, MSC and base-station planning, because they must allocate and interpret identities consistently. It also matters to numbering administrators and to teams responsible for roaming, call routing, handover and equipment traceability.

What changed in SIST EN 300 523 V4.10.1:2003 from the previous edition?

SIST EN 300 523 V4.10.1:2003 is an upgrade to Edition 3 and includes a change request from CN#7.

Which standards are used with SIST EN 300 523 V4.10.1:2003?

The document relies on several companion standards and recommendations:

• GSM 01.04 - provides abbreviations and acronyms used in the specification.
• GSM 03.08 - covers organisation of subscriber data, including RSZI and related subscriber information.
• GSM 03.20 - covers security-related network functions, including TMSI handling.
• GSM 03.70 - covers routing of calls to and from Public Data Networks, including X.121 implications.
• GSM 04.08 - provides mobile radio interface layer 3 details that support identity handling.
• GSM 09.03 - covers PSTN/ISDN interworking signalling used for number interpretation and rerouting.
• GSM 11.11 - covers the SIM-ME interface, including how identities are stored.
• CCITT E.164 - provides the ISDN numbering plan used for MSISDN and location numbers.
• CCITT E.212 - provides the land mobile subscriber identification plan used for IMSI.
• CCITT E.213 - provides the mobile station numbering plan used for MSISDN and MSRN.
• CCITT X.121 - provides the international data numbering plan used for mobile station data numbers.

What does the SIST EN 300 523 V4.10.1:2003 document contain?

The document contains identity structures shown in figures for IMSI, MSISDN, LAI, CGI, BSIC, RSZI, IMEI and IMEISV. It also gives allocation principles, such as which body assigns MCC, how operators assign NMSI and how manufacturers assign TAC, FAC, SNR and SVN. Annex A adds planning guidance for BSIC and provides an example set of Network Colour Codes (NCCs) for the European region.

For practical use, the document supports number planning, roaming design, cell planning, subscriber data management and equipment identification. It is the reference a network team uses when they need to know how GSM identities are built and how they are meant to be assigned and interpreted.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.âWHYLOþHQMHEuropean digital cellular telecommunications system (Phase 2); Numbering, addressing and identification (GSM 03.03 version 4.10.1)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 523 Version 4.10.1SIST EN 300 523 V4.10.1:2003en01-december-2003SIST EN 300 523 V4.10.1:2003SLOVENSKI
STANDARD
ETSIEN300523V4.10.1(2000-11)EuropeanStandard(Telecommunicationsseries)Europeandigitalcellulartelecommunicationssystem(Phase2);Numbering,addressingandidentification(GSM03.03version4.10.1)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 523 V4.10.1:2003

ETSIETSIEN300523V4.10.1(2000-11)2(GSM03.03version4.10.1)ReferenceREN/TSGN-000303PR2KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88ImportantnoticeIndividualcopiesofthepresentdocumentcanbedownloadedfrom:http://www.etsi.orgThepresentdocumentmaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.Usersofthepresentdocumentshouldbeawarethatthedocumentmaybesubjecttorevisionorchangeofstatus.InformationonthecurrentstatusofthisandotherETSIdocumentsisavailableathttp://www.etsi.org/tb/status/Ifyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]opartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 523 V4.10.1:2003

ETSIETSIEN300523V4.10.1(2000-11)3(GSM03.03version4.10.1)ContentsIntellectualPropertyRights.4Foreword.41Introduction.51.1Scope.51.2References.51.3Definitonsandabbreviations.61.4Generalcommentstoreferences.61.5Conventionsonbitordering.62Identificationofmobilesubscribers.62.1General.62.2CompositionofIMSI.72.3Allocationprinciples.72.4StructureofTMSI.72.5StructureofLMSI.83Numberingplanformobilestations.83.1General.83.2Numberingplanrequirements.83.3StructureofmobilestationinternationalPSTN/ISDNnumber(MSISDN).93.4MobileStationRoamingNumber(MSRN)forPSTN/ISDNrouteing.93.5StructureofMobileStationInternationalDataNumber.103.6HandoverNumber.104Identificationoflocationareasandbasestations.104.1CompositionoftheLocationAreaIdentification(LAI).104.2Basestationidentification.104.2.1CellIdentity(CI)andCellGlobalIdentification(CGI).104.2.2BaseStationIdentifyCode(BSIC).114.3RegionalSubscriptionZoneIdentity(RSZI).114.4LocationNumber.125IdentificationofMSCsandlocationregisters.125.1Identificationforroutingpurpose.125.2IdentificationofHLRforHLRrestorationapplication.126Internationalmobilestationequipmentidentityandsoftwareversionnumber.126.1General.126.2CompositionofIMEIandIMEISV.136.2.1CompositionofIMEI.136.2.2CompositionofIMEISV.136.3Allocationprinciples.14AnnexA(informative):ColourCodes.15A.1UtilisationoftheBSIC.15A.2Guidanceforplanning.15A.3ExampleofPLMNColourCodes(NCCs)fortheEuropeanregion.16History.17SIST EN 300 523 V4.10.1:2003

ETSIETSIEN300523V4.10.1(2000-11)4(GSM03.03version4.10.1)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinETSISR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinETSISR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbyETSITechnicalCommitteeSpecialMobileGroup(SMG).Thepresentdocumentdefinestheplansandprinciplesofnumbering,addressingandidentificationwithintheEuropeandigitalcellulartelecommunicationssystem(Phase2).ThissecondeditionofETS300523correspondstoGSMTechnicalSpecification(GSM-TS)GSM03.03version4.9.0.ThespecificationfromwhichthepresentdocumenthasbeenderivedwasoriginallybasedonCEPTdocumentation,hencethepresentationofthepresentdocumentmaynotbeentirelyinaccordancewiththeETSI/PNErules.ReferenceismadewithinthepresentdocumenttoGSM-TSs(note).NOTE:TC-SMGhasproduceddocumentswhichgivethetechnicalspecificationsfortheimplementationoftheEuropeandigitalcellulartelecommunicationssystem.Historically,thesedocumentshavebeenidentifiedasGSMTechnicalSpecifications(GSM-TSs).TheseTSsmayhavesubsequentlybecomeI-ETSs(Phase1),orETSs(Phase2),whilstothersmaybecomeETSITechnicalReports(ETRs).GSM-TSsare,foreditorialreasons,stillreferredtoinGSMETSs.NationaltranspositiondatesDateofadoptionofthisEN:3November2000DateoflatestannouncementofthisEN(doa):28February2001DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31August2001DateofwithdrawalofanyconflictingNationalStandard(dow):31August2001SIST EN 300 523 V4.10.1:2003

ETSIETSIEN300523V4.10.1(2000-11)5(GSM03.03version4.10.1)1Introduction1.1ScopeThepresentdocumentdefines:a)anidentificationplanformobilesubscribersintheGSMsystem;b)principlesofassigningtelephoneandISDNnumberstomobilestationsinthecountryofregistrationofthemobilestation;c)principlesofassigningmobilestationroamingnumberstovisitingmobilestations;d)anidentificationplanforlocationareasandbasestationsintheGSMsystem;e)anidentificationplanforMSCsandlocationregistersintheGSMsystem;f)principlesofassigninginternationalmobileequipmentidentities;g)principlesofassigningzonesforregionalsubscription.1.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.[1]GSM01.04(ETR100):"Europeandigitalcellulartelecommunicationssystem(Phase2);Abbreviationsandacronyms".[2]GSM03.08(ETS300526):"Europeandigitalcellulartelecommunicationssystem(Phase2);Organisationofsubscriberdata".[3]GSM03.20(ETS300534):"Europeandigitalcellulartelecommunicationssystem(Phase2);Securityrelatednetworkfunctions".[4]GSM03.70(ETS300541):"Europeandigitalcellulartelecommunicationssystem(Phase2);Routeingofcallsto/fromPublicDataNetworks(PDN)".[5]GSM04.08(ETS300557):"Europeandigitalcellulartelecommunicationssystem(Phase2);Mobileradiointerfacelayer3specification".[6]GSM09.03(ETS300600):"Europeandigitalcellulartelecommunicationssystem(Phase2);SignallingrequirementsoninterworkingbetweentheIntegratedServicesDigitalNetwork(ISDN)orPublicSwitchedTelephoneNetwork(PSTN)andthePublicLandMobileNetwork(PLMN)".[7]GSM11.11(ETS300608):"Europeandigitalcellulartelecommunicationssystem(Phase2);SpecificationoftheSubscriberIdentityModule-MobileEquipment(SIM-ME)interface".[8]CCITTRecommendationE.164:"NumberingplanfortheISDNera".[9]CCITTRecommendationE.212:"Identificationplanforlandmobilestations".SIST EN 300 523 V4.10.1:2003

ETSIETSIEN300523V4.10.1(2000-11)6(GSM03.03version4.10.1)[10]CCITTRecommendationE.213:"TelephoneandISDNnumberingplanforlandmobilestationsinpubliclandmobilenetworks(PLMN)".[11]CCITTRecommendationX.121:"Internationalnumberingplanforpublicdatanetworks".1.3DefinitonsandabbreviationsAbbreviationsusedinthisspecificationarelistedinGSM01.04.1.4GeneralcommentstoreferencesTheidentificationplanformobilesubscribersdefinedbelowisthatdefinedinCCITTRecommendationE.212.TheISDNnumberingplanformobilestationsandtheallocationofmobilestationroamingnumbersisthatdefinedinCCITTRecommendationE.213.OnlyoneoftheprinciplesforallocatingISDNnumbersisproposedforGSMPLMNs.OnlythemethodforallocatingmobilestationroamingnumberscontainedinthemaintextofCCITTRecommendationE.213isrecommendedforuseinGSMPLMNs.IfthereisanydifferencebetweenthisTechnicalSpecificationandtheCCITTRecommendations,theformershallprevail.Forterminology,seealsoCCITTRecommendationsE.164andX.121.1.5ConventionsonbitorderingThefollowingconventionsholdforthecodingofthedifferentidentitiesappearinginthisTechnicalSpecificationandinotherGSMTechnicalSpecificationsifnotindicatedotherwise:-thedifferentpartsofanidentityareshowninthefiguresinorderofsignificance;-themostsignificantpartofanidentityisontheleftpartofthefigureandtheleastsignificantontheright.WhenanidentityappearsinotherTechnicalSpecifications,thefollowingconventionsholdifnotindicatedotherwise:-digitsarenumberedbyorderofsignificance,withdigit1beingthemostsignificant;-bitsarenumberedbyorderofsignificance,withthelowestbitnumbercorrespondingtotheleastsignificantbit.2Identificationofmobilesubscribers2.1GeneralAuniqueInternationalMobileSubscriberIdentity(IMSI)shallbeallocatedtoeachmobilesubscriberintheGSMsystem.NOTE:ThisIMSIistheconceptreferredtobyCCITTas"InternationalMobileStationIdentity".InordertosupportthesubscriberidentityconfidentialityservicetheVLRsmayallocateauniqueTemporaryMobileSubscriberIdentity(TMSI)tovisitingmobilesubscribers.TheVLRmustbecapableofcorrelatingtheIMSIofanMSandthecurrentTMSIforthatMS.InordertospeedupthesearchforsubscriberdataintheVLRasupplementaryLocalMobileStationIdentity(LMSI)isdefined.TheLMSImaybeallocatedbytheVLRatlocationupdatingandissenttotheHLRtogetherwiththeIMSI.TheHLRmakesnouseofitbutincludesittogetherwiththeIMSIinallmessagessenttotheVLRconcerningthatMS.SIST EN 300 523 V4.10.1:2003

ETSIETSIEN300523V4.10.1(2000-11)7(GSM03.03version4.10.1)2.2CompositionofIMSIIMSIiscomposedasshowninfigure1.Notmorethan15digits<>3digits2digits<><>MCCMNCMSINNMSI<>IMSI<>Figure1:StructureofIMSIIMSIiscomposedofthreeparts:i)MobileCountryCode(MCC)consistingofthreedigits.TheMCCidentifiesuniquelythecountryofdomicileofthemobilesubscriber;ii)MobileNetworkCode(MNC)consistingoftwodigitsforGSMapplications.TheMNCidentifiesthehomeGSMPLMNofthemobilesubscriber;iii)MobileSubscriberIdentificationNumber(MSIN)identifyingthemobilesubscriberwithinaGSMPLMN.TheNationalMobileSubscriberIdentity(NMSI)consistsoftheMobileNetworkCodeandtheMobileSubscriberIdentificationNumber.2.3AllocationprinciplesIMSIshallconsistofnumericalcharacters(Othrough9)only.TheoverallnumberofdigitsinIMSIshallnotexceed15digits.TheallocationofMobileCountryCodes(MCCs)isadministeredbytheCCITTandisgiveninAnnexAtoCCITTBlueBookRecommendationE.212.TheallocationofNationalMobileSubscriberIdentity(NMSI)istheresponsibilityofeachadministration.IfmorethanoneGSMPLMNexistinacountry,auniqueMobileNetworkCodeshouldbeassignedtoeachofthem.TheallocationofIMSIsshouldbesuchthatnotmorethanthedigitsMCC+MNCoftheIMSIhavetobeanalysedinaforeignGSMPLMNforinformationtransfer.2.4StructureofTMSISincetheTMSIhasonlylocalsignificance(i.e.withintheVLRandtheareacontrolledbytheVLR),thestructureandcodingofitcanbechosenbyagreementbetweenoperatorandmanufacturerinordertomeetlocalneeds.TheTMSIconsistsof4octets.Itcanbecodedusingafullhexadecimalrepresentation.InordertoavoiddoubleallocationofTMSIsafterarestartofaVLR,somepartoftheTMSImayberelatedtothetimewhenitwasallocatedorcontainabitfieldwhichischangedwhentheVLRhasrecoveredfromtherestart.TheTMSIshallonlybeallocatedincipheredform.SeealsoTechnicalSpecificationGSM03.20.ThenewtworkshallnotallocateaTMSIwithall32bitsequalto1(thisisbecausetheTMSImustbestoredintheSIM,andtheSIMuses4octetswithallbitsequalto1forindicatingthatnovalidTMSIisavailable.SIST EN 300 523 V4.10.1:2003

ETSIETSIEN300523V4.10.1(2000-11)8(GSM03
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