SIST EN 300 924 V7.0.1:2003

• Abstract:

  Upgrade to Release 1998

• 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
• Mandate: UIC
• Ref Project: ETSI EN 300 924 V7.0.1 (2000-01) - Digital cellular telecommunications system (Phase 2+) (GSM); enhanced Multi-Level Precedence and Pre-emption service (eMLPP) - Stage 1 (GSM 02.67 version 7.0.1 Release 1998)

Overview

SIST EN 300 924 V7.0.1:2003 specifies the stage 1 description of the enhanced Multi-Level Precedence and Pre-emption service (eMLPP) for digital cellular telecommunications systems (GSM Phase 2+), as upgraded for Release 1998. This European standard, fully aligned with EN 300 924 Version 7.0.1 and maintained by the Slovenski inštitut za standardizacijo (SIST), outlines the user-oriented requirements and operational procedures for the eMLPP supplementary service in GSM networks.

The eMLPP service supports mission-critical communication by assigning priority levels to calls, allowing high-priority calls to pre-empt lower-priority ones when network resources are limited. This standard is crucial for sectors that rely on assured communications, such as public safety, emergency services, railways, and other critical infrastructure domains.

Key Topics

The standard addresses the following key areas:

• Precedence Levels: Definition and usage of up to seven priority levels, with the highest reserved for network emergencies.
• Pre-emption Mechanisms: Procedures for resource allocation when network congestion occurs, ensuring high-priority calls are set up or maintained.
• Service Applicability: eMLPP as a supplementary service available to GSM subscribers across all basic and bearer services.
• Call Scenarios: Rules for handling mobile-originated, mobile-terminated, and mobile-to-mobile calls including roaming.
• Operator Controls: Capabilities for operators to configure which priority levels allow pre-emption and the relationship to network planning.
• User Experience: How subscribers can select priority levels (within authorized limits), automatic answering for urgent calls, and indications given to users affected by pre-emption.
• Interaction with Other Services: Detailed interactions and precedence with supplementary GSM services such as call forwarding, call hold, call waiting, and barring services.
• Interworking: Rules for integration with other networks following ITU-T Recommendation I.255.3, preserving priority mapping during inter-network calls.

Applications

SIST EN 300 924 V7.0.1:2003 is highly relevant in scenarios such as:

• Emergency Communication: Ensures that critical emergency and command communications receive necessary priority, overriding less important traffic when network resources are scarce.
• Public Safety Networks: Supports police, fire, ambulance, and disaster recovery teams needing guaranteed mobile communication access.
• Mission-Critical Rail and Industrial Operations: Enables prioritized voice group calls and broadcast services for operational safety and efficiency.
• Commercial and Government Networks: Permits entities requiring escalating levels of call priority to structure communications according to operational urgency.

By implementing eMLPP, GSM network operators can offer graded call priority services for subscribers, fulfilling regulatory requirements and service-level agreements in high-stakes environments.

Related Standards

To ensure full compatibility and best practices in deployment, several related standards are referenced or should be considered alongside SIST EN 300 924 V7.0.1:2003:

• GSM 01.04: Abbreviations and acronyms for GSM systems
• GSM 02.04: General description of supplementary services
• GSM 02.24: Charge Advice Information
• GSM 02.40: Procedures for call progress indications
• GSM 02.68 / GSM 03.68: Voice Group Call Service (VGCS)
• GSM 02.69 / GSM 03.69: Voice Broadcast Service (VBS)
• ITU-T Recommendation I.255.3: ISDN Multi-Level Precedence and Pre-emption (MLPP)

Keywords: digital cellular telecommunications, GSM, eMLPP, multi-level precedence, pre-emption, emergency communication, public safety, network priority services, critical infrastructure, Release 1998

By following this standard, network designers and operators can guarantee that their GSM infrastructures provide robust, prioritized communication paths for essential services, supporting national and organizational resilience.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); enhanced Multi-Level Precedence and Pre-emption service (eMLPP) - Stage 1 (GSM 02.67 version 7.0.1 Release 1998)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 300 924 Version 7.0.1SIST EN 300 924 V7.0.1:2003en01-december-2003SIST EN 300 924 V7.0.1:2003SLOVENSKI
STANDARD
ETSIEN300924V7.0.1(2000-01)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);enhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP)-Stage1(GSM02.67version7.0.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 924 V7.0.1:2003

ETSIETSIEN300924V7.0.1(2000-01)2(GSM02.67version7.0.1Release1998)ReferenceREN/SMG-010267Q7KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:[phone]Fax:[phone]SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/[e-mail]ETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:[e-mail]Ideliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute1999.Allrightsreserved.SIST EN 300 924 V7.0.1:2003

ETSIETSIEN300924V7.0.1(2000-01)3(GSM02.67version7.0.1Release1998)ContentsIntellectualPropertyRights.4Foreword.41Scope.52References.53Definitionsandabbreviations.63.1Definitions.63.2Abbreviations.64Description.64.1Applicabilitytotelecommunicationservices.95Normaloperationwithsuccessfuloutcome.95.1Provision.95.2Withdrawal.95.3Registration.95.4Erasure.105.5Networkrelatedserviceconfiguration.105.6Activation.105.7Deactivation.105.8Invocation.105.9Normaloperation.105.10Interrogation.115.11Chargingrequirements.116Exceptionalproceduresorunsuccessfuloutcome.117Alternateprocedures.118Interactionwithothersupplementaryservices.118.1CallingLineIdentificationPresentation(CLIP).118.2CallingLineIdentificationRestriction(CLIR).118.3ConnectedLineIdentificationPresentation(COLP).118.4ConnectedLineIdentificationRestriction(COLR).118.5CallForwardingUnconditional(CFU).118.6CallForwardingonmobilesubscriberbusy(CFB).128.7CallForwardingonNoReply(CFNRy).128.8CallForwardingonmobilesubscriberNotReachable(CFNRc).128.9CallWaiting(CW).128.10CallHold.128.11Multi-partyService(MPTY).128.12ClosedUserGroup(CUG).128.13AdviceofCharge(AoC).128.14BarringofOutgoingCalls(BAOC).128.15BarringofOutgoingInternationalCalls(BOIC).138.16BarringofOutgoingInternationalCallsexceptthosetotheHomePLMNcountry(BOIC-exHC).138.17BarringofAllIncomingCalls(BAIC).138.18BarringofIncomingCallswhenRoamingoutsidethehomePLMNcountry(BIC-Roam).138.19CallTransfer(ECT).139Interworkingconsiderations.13AnnexA(informative):StatusofTechnicalSpecificationGSM02.67.14History.15SIST EN 300 924 V7.0.1:2003

ETSIETSIEN300924V7.0.1(2000-01)4(GSM02.67version7.0.1Release1998)IntellectualPropertyRightsIPRsessentialorpotentiallyessentialtothepresentdocumentmayhavebeendeclaredtoETSI.TheinformationpertainingtotheseessentialIPRs,ifany,ispubliclyavailableforETSImembersandnon-members,andcanbefoundinSR000314:"IntellectualPropertyRights(IPRs);Essential,orpotentiallyEssential,IPRsnotifiedtoETSIinrespectofETSIstandards",whichisavailablefromtheETSISecretariat.LatestupdatesareavailableontheETSIWebserver(http://www.etsi.org/ipr).PursuanttotheETSIIPRPolicy,noinvestigation,includingIPRsearches,hasbeencarriedoutbyETSI.NoguaranteecanbegivenastotheexistenceofotherIPRsnotreferencedinSR000314(ortheupdatesontheETSIWebserver)whichare,ormaybe,ormaybecome,essentialtothepresentdocument.ForewordThisEuropeanStandard(Telecommunicationsseries)hasbeenproducedbytheSpecialMobileGroup(SMG).Thepresentdocumentspecifiesthestage1descriptionoftheenhancedMulti-LevelPrecedenceandPre-emptionService(eMLPP)withinthedigitalcellulartelecommunicationssystem.ThecontentsofthepresentdocumentmaybesubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillthenbere-submittedforformalapprovalproceduresbyETSIwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7GSMPhase2+Release1998;xtheseconddigitisincrementedforchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.;ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:31December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 300 924 V7.0.1:2003

ETSIETSIEN300924V7.0.1(2000-01)5(GSM02.67version7.0.1Release1998)1ScopeThepresentdocumentspecifiesthestage1descriptionoftheenhancedMulti-LevelPrecedenceandPre-emptionService(eMLPP).Thisservicehastwoparts:precedenceandpre-emption.Precedenceinvolvesassigningapriorityleveltoacallincombinationwithfastcallset-up.Pre-emptioninvolvestheseizingofresources,whichareinusebyacallofalowerprecedence,byahigherlevelprecedencecallintheabsenceofidleresources.Pre-emptioncanalsoinvolvethedisconnectionofanon-goingcalloflowerprecedencetoacceptanincomingcallofhigherprecedence.TheeMLPPserviceisprovidedasanetworkoperator'soptiontoadomainofanetwork.Thedomaincanbethewholenetworkorasubsetofthenetwork.TheeMLPPserviceappliestoallnetworkresourcesinthedomainthatisincommonuse.TheeMLPPserviceisapplicabletoallmobilestationsinthedomainwithallorsomemobilestationshavingarespectivesubscriptionassigningprecedenceaccordingtotheeMLPPservice.eMLPPisasupplementaryserviceandshallbeprovidedtoasubscriberforallbasicservicessubscribedtoandforwhicheMLPPapplies.NOTE:ItisunderstudywhethernormalGSMPhase2MobileStationswillbeabletobeusedforthisservice.Theserviceisdescribedfromtheservicesubscriber'sanduser'spointofview,inparticular:-theprocedurefornormaloperationwithsuccessfuloutcome;-theactiontobetakeninexceptionalcircumstances;-theinteractionwithotherGSMservicesandfeatures.ThepresentdocumentdoesnotdealwiththeMan-MachineInterface(MMI)requirements,butmakesreferencetotheappropriateGlobalSystemforMobilecommunications(GSM)specifications.Thepresentdocumentisapplicabletoteleservices1xand6xandtoallbearerservicesusedinamobilenetworkaccordingtothedigitalcellulartelecommunicationssystemGSMifeMLPPisprovided.Anyinteractionwithotherservicesand/ornetworksnotdealtwithinclauses8or9areoutsidethescopeofthepresentdocument.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.•Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.•Foraspecificreference,subsequentrevisionsdonotapply.•Foranon-specificreference,thelatestversionapplies.•Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.•ForthisRelease1998document,referencestoGSMdocumentsareforRelease1998versions(version7.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationssystem(Phase2+);Abbreviationsandacronyms".[2]GSM02.04:"Digitalcellulartelecommunicationssystem(Phase2+);Generalonsupplementaryservices".[3]GSM02.24:"Digitalcellulartelecommunicationssystem(Phase2+);DescriptionofChargeAdviceInformation(CAI)".[4]GSM02.40:"Digitalcellulartelecommunicationssystem(Phase2+);Proceduresforcallprogressindications".SIST EN 300 924 V7.0.1:2003

ETSIETSIEN300924V7.0.1(2000-01)6(GSM02.67version7.0.1Release1998)[5]GSM02.68:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceGroupCallService(VGCS)-Stage1".[6]GSM02.69:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceBroadcastService(VBS)-Stage1".[7]GSM03.05:"Digitalcellulartelecommunicationssystem(Phase2+);Technicalperformanceobjectives".[8]GSM03.68:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceGroupCallService(VGCS)-Stage2".[9]GSM03.69:"Digitalcellulartelecommunicationssystem(Phase2+);VoiceBroadcastService(VBS)-Stage2".[10]ITU-TRecommendationI.255.3:"ISDNMulti-LevelPrecedenceandPre-emption(MLPP)stage1".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingdefinitionsapply:callingsubscriber:ServicesubscriberwhichinvokestheeMLPPservice.networkoperator:EntitywhichprovidesthenetworkoperatingelementsandresourcesfortheexecutionoftheenhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP).precedence:Precedenceisthepriorityassociatedwithacall.serviceprovider:EntitywhichofferstheeMLPPserviceforsubscription.Thenetworkoperatormaybetheserviceprovider.servicesubscriber:MobilesubscriberwhichsubscribestotheeMLPPservice.Inprinciple,ifanetworkprovideseMLPPservice,allusersareabletosubscribetothisservice.3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationsapply,inadditiontothoselistedinGSM01.04:eMLPPenhancedMulti-LevelPrecedenceandPre-emption4Descriptiona)TheenhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP)providesdifferentlevelsofprecedenceforcallset-upandforcallcontinuityincaseofhandover.eMLPPshallbeapplicablealsoincaseofroamingifsupportedbytherelatednetworks.Themaximumprecedencelevelofasubscriberissetatthesubscriptiontimebytheserviceprovider,basedonthesubscriber'sneed.Thesubscribermayselectaprecedenceleveluptoandincludingthemaximumprecedencelevelsubscribedto,onapercallbasis.Thereareatmaximum7priorityle
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