SIST EN 300 924 V6.1.1:2003

• Abstract:

  Upgrade from Phase 2+ to Release 1997

• 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 V6.1.1 (1999-12) - Digital cellular telecommunications system (Phase 2+) (GSM); enhanced Multi-Level Precedence and Pre-emption service (eMLPP) - Stage 1 (GSM 02.67 version 6.1.1 Release 1997)

Overview

SIST EN 300 924 V6.1.1:2003 specifies the Stage 1 description of the enhanced Multi-Level Precedence and Pre-emption service (eMLPP) for the digital cellular telecommunications system (GSM Phase 2+), aligned with Release 1997. This European Standard, identical to EN 300 924 V6.1.1, defines business and functional requirements from the user's perspective, providing a crucial upgrade from earlier GSM phases to support advanced priority call handling.

The eMLPP supplementary service is designed to prioritize call set-up and maintain call continuity by managing resource access in situations of network congestion. It empowers network operators to offer differentiated services, essential for sectors requiring urgent and prioritized communications, such as emergency, government, and military domains.

Key Topics

• Precedence and Pre-emption:

  • Precedence assigns a priority level to a call, enabling expedited call set-up for critical communications.
  • Pre-emption allows higher-priority calls to seize resources currently used by lower-priority calls, or to disconnect such calls when essential.

• Priority Levels:

  • Seven levels are defined; two are reserved for internal network operations, such as emergency communications, while five are available for subscriber allocation.
  • Priority levels determine call handling and network resource allocation, especially during congestion.

• Service Provision:

  • eMLPP can be implemented across an entire network or within defined domains.
  • Service subscribers receive a maximum authorized precedence level, managed by the provider.
  • Subscribers can select the appropriate precedence for each call within their authorized range.

• Call Handling:

  • Automatic answering and call hold/pre-emption mechanisms are triggered for incoming high-priority calls.
  • Network ensures quick call set-up (1-2 seconds for highest priorities, up to 10 seconds for the lowest).
  • Pre-emption events provide clear indications to affected users.

• Interworking and Interactions:

  • eMLPP interworks with ISDN MLPP services, ensuring consistency across heterogeneous networks.
  • The standard details interactions with common supplementary services like Call Waiting, Call Forwarding, and Barring of Calls, preserving priority where required.

Applications

Enhanced Multi-Level Precedence and Pre-emption (eMLPP) provides practical value in scenarios that demand robust, prioritized communications:

• Emergency Services: Ensures that emergency calls have priority access to network resources, even under heavy load.
• Public Safety and Government: Supports organizations requiring guaranteed communications during crisis or mission-critical situations.
• Transport and Utilities: Facilitates prioritized group or broadcast calls for field teams and operations centers.
• Enterprise and Critical Infrastructure: Enables internal prioritization policies and seamless priority handling in interconnected networks.

By implementing eMLPP, network operators can guarantee that urgent communications take precedence over routine traffic, thereby improving reliability for critical users.

Related Standards

• GSM 01.04: Digital cellular telecommunications system (GSM); Abbreviations and acronyms.
• GSM 02.04: General on supplementary services.
• GSM 02.68: Voice Group Call Service (VGCS) - Stage 1.
• GSM 02.69: Voice Broadcast Service (VBS) - Stage 1.
• ITU-T Recommendation I.255.3: ISDN Multi-Level Precedence and Pre-emption (MLPP) stage 1.
• GSM 03.05: Technical performance objectives.
• GSM 02.24: Description of Charge Advice Information (CAI).
• GSM 02.40: Procedures for call progress indications.

SIST EN 300 924 V6.1.1:2003 is a key reference for GSM network operators, service providers, and application developers who require robust and standardized support for priority communications in digital cellular networks. By complying with this standard, organizations ensure compatibility and interoperability with pan-European and international mobile telecommunications services.

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 6.1.1 Release 1997)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 6.1.1SIST EN 300 924 V6.1.1:2003en01-december-2003SIST EN 300 924 V6.1.1:2003SLOVENSKI
STANDARD
ETSIEN300924V6.1.1(1999-12)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);enhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP)-Stage1(GSM02.67version6.1.1Release1997)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 924 V6.1.1:2003

ETSIETSIEN300924V6.1.1(1999-12)2(GSM02.67version6.1.1Release1997)ReferenceREN/SMG-010267Q6R1KeywordsDigitalcellulartelecommunicationssystem,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 V6.1.1:2003

ETSIETSIEN300924V6.1.1(1999-12)3(GSM02.67version6.1.1Release1997)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 V6.1.1:2003

ETSIETSIEN300924V6.1.1(1999-12)4(GSM02.67version6.1.1Release1997)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:Version6.x.ywhere:6GSMPhase2+Release1997;xtheseconddigitisincrementedforchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.;ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:17December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 300 924 V6.1.1:2003

ETSIETSIEN300924V6.1.1(1999-12)5(GSM02.67version6.1.1Release1997)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.•ForthisRelease1997document,referencestoGSMdocumentsareforRelease1997versions(version6.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 V6.1.1:2003

ETSIETSIEN300924V6.1.1(1999-12)6(GSM02.67version6.1.1Release1997)[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,thefollowingtermsanddefinitionsapply.callingsubscriber:ServicesubscriberwhichinvokestheeMLPPservice.networkoperator:EntitywhichprovidesthenetworkoperatingelementsandresourcesfortheexecutionoftheenhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP).precedence:Precedenceisthepriorityassociatedwithacall.serviceprovider:EntitywhichofferstheeMLPPserviceforsubscription.Thenetworkoperatormaybetheserviceprovider.servicesubscriber:MobilesubscriberwhichsubscribestotheeMLPPservice.Inprinciple,ifanetworkprovideseMLPPservice,allusersareabletosubscribetothisservice.3.2AbbreviationsForthepurposesofthepresentdocument,thefollowingabbreviationapplies,inadditiontothoselistedinGSM01.04:eMLPPenhancedMulti-LevelPrecedenceandPre-emption4Descriptiona)TheenhancedMulti-LevelPrecedenceandPre-emptionservice(eMLPP)providesdifferentlevelsofprecedenceforcallset-upandforcallcontinuityincaseofhandover.eMLPPshallbeapplicablealsoincaseofroamingifsupportedbytherelatednetworks.Themaximumprecedencelevelofasubscriberissetatthesubscriptiontimebytheserviceprovider,basedonthesubscriber'sneed.Thesubscribermayselectaprecedenceleveluptoandincludingthemaximumprecedencelevelsubscribedto,onapercallbasis.Thereareatmaximum7prioritylevels
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