SIST EN 300 923 V7.0.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); Description of Charge Advice Information (CAI) (GSM 02.24 version 7.0.1 Release 1998)
- Abstract
Upgrade o Release 1998
- Status
- Published
- Publication Date
- 30-Nov-2003
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 01-Dec-2003
- Due Date
- 01-Dec-2003
- Completion Date
- 01-Dec-2003
SIST EN 300 923 V7.0.1:2003 is the Slovenian adoption of ETSI EN 300 923 Version 7.0.1 for GSM Phase 2+ Release 1998. It specifies Charge Advice Information (CAI) for the Mobile Station (MS) and the Public Land Mobile Network (PLMN), so the MS can estimate call charges in home units during a call and, where supported, present them in a subscriber-chosen currency.
The document is for GSM implementers, operators, and SIM or handset designers who need the charging logic, meter handling, and network signalling rules behind Advice of Charge (AoC).
What does SIST EN 300 923 V7.0.1:2003 specify?
SIST EN 300 923 V7.0.1:2003 specifies how CAI is sent to the MS and how the MS uses it to compute AoC. The scope is functional: it defines the charging behaviour in the PLMN and in the MS, while leaving implementation details open so products can evolve.
The document is organized into these main parts:
- Clause 1 - Scope, references, and definitions
- Clause 2 - Introduction and charging principles
- Clause 3 - CAI
- Clause 4 - Functional operation in the MS
- Clause 5 - Functional operation in the PLMN
- Annex A - Change history
Clause 1 also states that the document describes functionality rather than constraining implementation. That matters in practice because vendors can design different internal solutions as long as the charging behaviour matches the specification.
What are the key requirements of SIST EN 300 923 V7.0.1:2003?
CAI signalling and charge calculation
Clause 3 says the network sends CAI to the MS on a per-call basis over the radio interface, and the MS uses the CAI elements to calculate the charge for that call. The MS starts charging when it receives the CAI message, so the charging point becomes part of the timing logic.
Clause 4 defines the basic calculation for AoC from the CAI elements. In practice, this means the MS must combine a fixed charge, a time-based component, and a data-based component, then apply the scaling to express the result in home units.
Meter handling in the MS
Clause 4.2 defines the Current Call Meter (CCM) and the Accumulated Call Meter (ACM). The CCM tracks the current call, while the ACM keeps a total for the current call and earlier calls and is stored in the SIM.
This matters because the CCM supports live charge advice during a call, while the ACM supports long-term accumulated charging and subscriber limits. The ACM only increases, and resetting it requires PIN2.
Subscriber limits and user display
Clause 4.2.3 defines the ACM Maximum value (ACMmax), which the subscriber can set to cap usage. When ACM reaches or passes ACMmax, the ME terminates chargeable calls after the current chargeable interval, and outgoing calls are blocked except emergency calls.
Clause 4.2.4 defines the Price per Unit and Currency Table (PUCT). This lets the MS present charges in a subscriber-selected currency, but it does not change the charges raised by the home network.
Special processing and updates during a call
Clause 4.3 covers zero values, delayed updates, and radio link failure. Zero values are valid and can disable the relevant charging part, while updates to e1, e2, e5, e6, and e7 are held until the current interval ends.
This is important for implementations because charging parameters can change during a call without breaking the running meter. The MS also suspends timing during radio link failure and resumes it after successful call re-establishment.
Network responsibilities
Clause 5 says the PLMN sends CAI when the called party answers. For outgoing calls, the local PLMN sets the CAI elements according to its own tariff structure, and e3 reflects the relationship between local and home units.
For incoming calls, the HPLMN tariff determines the CAI values. For roaming cases, the VPLMN must be loaded with the HPLMN-derived CAI values for each roaming partner so that incoming charging can be handled consistently.
What terms does SIST EN 300 923 V7.0.1:2003 define?
- Charge Advice Information (CAI) - The signalling information sent to the MS so it can compute call charges.
- Advice of Charge (AoC) - The charge calculated by the MS and expressed in home units.
- Current Call Meter (CCM) - The MS meter that accumulates the charge for the current call.
- Accumulated Call Meter (ACM) - The SIM-stored total of the current and previous call charges.
- ACM Maximum value (ACMmax) - The subscriber-set upper limit for ACM.
- Price per Unit and Currency Table (PUCT) - The SIM-stored table that lets the MS present charges in a chosen currency.
- Local PLMN (LPLMN) - The PLMN with which the MS is currently interworking over the radio interface.
Who uses SIST EN 300 923 V7.0.1:2003?
Mobile network operators use this standard to define when and how charging advice is sent for outgoing and incoming calls. SIM and Mobile Station designers use it to implement metering, charge display, ACM storage, ACMmax limits, and PUCT handling.
It is also relevant to roaming and tariff teams, because clause 5 describes how local and home network tariffs interact. Test and conformance engineers use it to verify call charging behaviour, call re-establishment handling, multiple-call handling, and the response to CAI messages.
What changed in SIST EN 300 923 V7.0.1:2003 from the previous edition?
Annex A records successive updates to the specification, including changes for the Accumulated Call Meter, clarifications, the introduction of PUCT, acknowledgement behaviour for CAI messages, support for multiple calls, increased ACM capacity, call handling with AoC, fault-condition behaviour, and upgrades to Phase 2+, Release 1997, and Release 1998.
The history also records the publication update to version 7.0.1.
Which standards are used with SIST EN 300 923 V7.0.1:2003?
- GSM01.04 - Provides abbreviations and acronyms used in the document.
- GSM02.86 - Defines the Advice of Charge supplementary service at Stage 1 and gives the service context for CAI.
- GSM11.11 - Defines the SIM-ME interface, including storage and control of ACM, ACMmax, and PUCT.
These references are Release 1998 versions for this document.
What does the SIST EN 300 923 V7.0.1:2003 document contain?
The document contains a CAI data model with seven information elements, their roles in charging, and the way the MS combines them into AoC. It also includes the calculation structure for time-related, fixed, and data-related charging, plus the special handling needed for zero values, interval changes, and multiple calls.
Clause 4 gives the metering logic for CCM, ACM, ACMmax, and PUCT, and clause 5 gives the PLMN rules for outgoing and incoming calls, including roaming treatment. Annex A provides the change history used to trace the specification’s evolution.
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Frequently Asked Questions
SIST EN 300 923 V7.0.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); Description of Charge Advice Information (CAI) (GSM 02.24 version 7.0.1 Release 1998)". This standard covers: Upgrade o Release 1998
Upgrade o Release 1998
SIST EN 300 923 V7.0.1:2003 is classified under the following ICS (International Classification for Standards) categories: 33.070.50 - Global System for Mobile Communication (GSM). The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 300 923 V7.0.1:2003 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); Description of Charge Advice Information (CAI) (GSM 02.24 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 300 923 Version 7.0.1SIST EN 300 923 V7.0.1:2003en01-december-2003SIST EN 300 923 V7.0.1:2003SLOVENSKI
STANDARD
ETSIEN300923V7.0.1(2000-01)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);DescriptionofChargeAdviceInformation(CAI)(GSM02.24version7.0.1Release1998)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 300 923 V7.0.1:2003
ETSIETSIEN300923V7.0.1(2000-01)2(GSM02.24version7.0.1Release1998)ReferenceREN/SMG-010224Q7KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM)ETSIPostaladdressF-06921SophiaAntipolisCedex-FRANCEOfficeaddress650RoutedesLucioles-SophiaAntipolisValbonne-FRANCETel.:+33492944200Fax:+33493654716SiretN°34862356200017-NAF742CAssociationàbutnonlucratifenregistréeàlaSous-PréfecturedeGrasse(06)N°7803/88Internetsecretariat@etsi.frIndividualcopiesofthisETSIdeliverablecanbedownloadedfromhttp://www.etsi.orgIfyoufinderrorsinthepresentdocument,sendyourcommentto:editor@etsi.frImportantnoticeThisETSIdeliverablemaybemadeavailableinmorethanoneelectronicversionorinprint.Inanycaseofexistingorperceiveddifferenceincontentsbetweensuchversions,thereferenceversionisthePortableDocumentFormat(PDF).Incaseofdispute,thereferenceshallbetheprintingonETSIprintersofthePDFversionkeptonaspecificnetworkdrivewithinETSISecretariat.CopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 300 923 V7.0.1:2003
ETSIETSIEN300923V7.0.1(2000-01)3(GSM02.24version7.0.1Release1998)ContentsIntellectualPropertyRights.4Foreword.41Scope.51.1References.51.2Definitionsandabbreviations.52Introduction.63ChargeAdviceInformation.74FunctionaloperationinMS.84.1HandlingoftheCAIelements.84.2Handlingofcallmeters.94.2.1TheCurrentCallMeter(CCM).94.2.2TheAccumulatedCallMeter(ACM).104.2.3TheACMMaximumValue(ACMmax).104.2.4ThePriceperUnitandCurrencyTable(PUCT).104.3Specialprocessing.105FunctionaloperationinPLMN.115.1Outgoingcalls.115.2Incomingcalls.11AnnexA(informative):Changehistory.13History.14SIST EN 300 923 V7.0.1:2003
ETSIETSIEN300923V7.0.1(2000-01)4(GSM02.24version7.0.1Release1998)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).ThepresentdocumentdescribestheoverallviewofhowthesupplementaryserviceofChargeAdviceInformation(CAI)operateswithinthedigitalcellulartelecommunicationssystem.ThecontentsofthepresentdocumentmaybesubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillthenbere-submittedforformalapprovalproceduresbyETSIwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version7.x.ywhere:7 GSM Phase 2+ Release 1998;xtheseconddigitisincrementedforchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.;ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:31December1999DateoflatestannouncementofthisEN(doa):31March2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):30September2000DateofwithdrawalofanyconflictingNationalStandard(dow):30September2000SIST EN 300 923 V7.0.1:2003
ETSIETSIEN300923V7.0.1(2000-01)5(GSM02.24version7.0.1Release1998)1ScopeThechargingsupplementaryserviceisdescribedinGSM02.86[2]andtherelevantchargingprinciplesaregivenintherelevantGSMMoUAssociationdocuments.Theseservicesaredesignedtosupplytoamobileusersufficientinformationtoallowareal-timeestimatetobemadeofthebillwhichwilleventuallybeleviedinthehomePLMNontheMobileStation(MS)subscriber.InthecaseofcertainMSuses,forexampleamobilepayphone,thisestimatecouldbesubjecttofurtherprocessing(e.g.topresentthechargesincurrency,ratherthanunits,thismayincludeanadditionalmarkup).ThisadditionalprocessingisnotdescribedinthepresentdocumentinordertoavoidconstrainingtheevolutionoftheMSproductinthisarea.ThepresentdocumentgivesanoverallviewofhowthissupplementaryserviceshalloperatebothinthePLMNandwithintheMS.Textgiveninthepresentdocumentisrequiredtodefinefunctionalityandisnotintendedtoconstrainimplementation.1.1ReferencesThefollowingdocumentscontainprovisionswhich,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]GSM02.86:"Digitalcellulartelecommunicationsystem(Phase2+);AdviceofCharge(AoC)SupplementaryServices-Stage1".[3]GSM11.11:"Digitalcellulartelecommunicationsystem(Phase2+);SpecificationoftheSubscriberIdentityModule-MobileEquipment(SIM-ME)interface".1.2DefinitionsandabbreviationsInadditiontothefollowing,abbreviationsusedinthepresentdocumentarelistedinGSM01.04[1].Markup(MU):Anincreaseoverthebasicchargee.g.toprovideextrarevenueortocoveradditionalcosts.ServiceProvider(SP):TheorganizationthroughwhichthesubscriberobtainsGSMtelecommunicationservices.Thismaybethenetworkoperatororpossiblyaseparatebody.HomeUnits(HU):ThepublishedbasictelecommunicationunitaspublishedbytheHPLMN.ThishasapublishedvalueexpressedinthecurrencyoftheHomecountry.SIST EN 300 923 V7.0.1:2003
ETSIETSIEN300923V7.0.1(2000-01)6(GSM02.24version7.0.1Release1998)LocalPLMN(LPLMN):TheLPLMNistheHPLMNorVPLMNdependingonthelocationoftheMSatthetimeandisthePLMNwithwhichtheMSisinterworkingviatheradiointerface.LocalUnits(LU):ThepublishedbasictelecommunicationunitaspublishedbytheLPLMN.Thishasapublishedvalueexpressedinthecurrencyofthelocalcountry.PriceperUnitandCurrencyTable(PUCT):ThePUCTisthevalueoftheHomeunitinacurrencychosenbythesubscriber.ThePUCTisstoredintheSIM.ThevalueofthePUCTcanbesetbythesubscriberandmayexceedthevaluepublishedbytheHPLMN.ThePUCTvaluedoesnothaveanyimpactonthechargesraisedbytheHPLMN.CurrentCallMeter(CCM):TheaccumulatedchargeascomputedbytheMS,expressedintermsofHomeunits.AccumulatedCallMeter(ACM):TheaccumulatedchargeforboththecurrentcallandallprecedingcallsascomputedbytheMS,expressedintermsofHomeunits.TheACMisstoredintheSIM.ACMMaximumvalue(ACMmax):TheACMmaxsetstheupperlimitfortheACM.TheACMmaxisstoredintheSIM.ThevalueoftheACMmaxcanbesetbythesubscriber.Chargingpoint(CHP):Thetimeatwhichchargingcommencesi.e.atthepointwhenthecalledpartyanswersortheequivalent.Endofchargepoint(CEND):Thetimeatwhichthecalling,orcalled,partystopschargingbytheterminationofthecallorbyanequivalentprocedureinvokedbythenetworkorbyfailureoftheradiopath.AdviceofCharge(AOC):ThechargeascomputedbytheMS,expressedintermsofHomeUnits.Segment:AchargingelementasdefinedbyCCITT,inoctets(upto64).2IntroductionTheprincipleofthisserviceisthattheMSshallbecapableofindicatingthecostofacallinhomeunitsasabasicservice.ThisistheAdviceofCharge(AOC).TheabilityfortheMStoperformfurtherprocessingonAOCisnotprecluded.Ifthesubscriberwishes,theMSshallindicatethevalueofCCM,ACM,ACMmaxinthecurrencyshehasindicatedusingthePUCT.Atthechargingpoint,theMSisinformedofthechargingrate.TheMSshallthenuseitsindependentinternalclocktotimethecallfromthechargingpointtotheendofcalli.e.thechargeableduration(CDUR)ismeasuredbytheMS.Inthecaseofmultiplecallsthisappliesseparatelyforeachcall(seesubclause4.3l).ThetimetakenattemptingtoperformcallreestablishmentisnotincludedinCDUR(seesubclause4.3m).Byusingthecalculationsdescribedinclause4,theMSshallbeabletoderivethenumberofhomeunitsused.SIST EN 300 923 V7.0.1:2003
ETSIETSIEN300923V7.0.1(2000-01)7(GSM02.24version7.0.1Release1998)Duetotheindependenceofthecalculatedvalue,anexactone-to-onerelationwiththebillcannotbeguaranteed.ThisdiscrepancyisduetotheshortdelaysinsignallingbetweentheMSandthenetwork,e.g.transmissionofchargingpointandendofcallsignals.Inderivingthepresentdocumentthefollowingprinciplesareassumed:i)Formobileoriginatedcalls,themobileuserpaysfortheconnectiontothediallednumber,asperthepublishedtariffoftheLocalPLMN,plusamark-updefinedbytheHPLMNtocoveradditionaladministrationcosts,whenroaming.ItisassumedthattheMSsubscriberwillnotbechargedfortheforwardedlegifthediallednumberhassetcallforwarding.Ifadditionalchargingisrequiredforthisforwardedleg,thenitisassumedthatsuchchargingwillbeappliedonlytothecalledparty.Thisfollowscurrenttelecommunicationspractice.ii)Formobileterminatedcalls,anychargesetforincomingcallsisthatbasedonthetariffaspublishedbytheHPLMN.Thetariffaspublishedfortheroamingextensionchargesisassumedtobetimeanddateinvariant.Fortheavoidanceofdoubt,thisassumptiondoesnotprecluderoutinetariffchanges.iii)ChargeratesforcallsoriginatingwithinaPLMNvarydependingupon,forexample,location,destination,service,timeofday,typeofdayandanymarkups.iv)TheunitsindicatedintheadviceofchargearealwaysgivenintermsofHomeunits,thevalueofwhichisdefinedandpublishedbytheHPLMN,regardlessofthePLMNinwhichtheywereincurredorthecalldirectionorthetypeofcallincludingsupplementaryserviceanddatacalls.3ChargeAdviceInformationTheMSissuppliedwiththenecessaryChargeAdviceInformation(CAI)atthechargingpointonapercallbasis,inasignallingmessageovertheradiointerface.TheMSusestheCAIelementstocomputetheAOCvaluefortherelevantcall.ThusthesignallingCAInotonlyprovidescharginginformation,butindicatesthechargingpointandhenceinitiatesthetimingofthechargeableduration.TheinformationsenttotheMSfromtheMSCconsistsofsevenelementsasfo
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