SIST EN 302 403 V8.0.1:2003

Digital cellular telecommunications system (Phase 2+) (GSM); GSM Cordless Telephony System (CTS), Phase 1; Service description; Stage 1 (GSM 02.56 version 8.0.1 Release 1999)

8.0.0 Specification upgrade to Release 1999 version 8.0.0

Digitalni celični telekomunikacijski sistem (faza 2+) – GSM sistem brezvrvične telefonije (CTS) – Faza 1 – Opis storitve – Stopnja 1 (GSM 02.56, različica 8.0.1, izdaja 1999)

General Information

• 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 302 403 V8.0.1 (2000-10) - Digital cellular telecommunications system (Phase 2+) (GSM); GSM Cordless Telephony System (CTS), Phase 1; Service description; Stage 1 (GSM 02.56 version 8.0.1 Release 1999)

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Digital cellular telecommunications system (Phase 2+) (GSM); GSM Cordless Telephony System (CTS), Phase 1; Service description; Stage 1 (GSM 02.56 version 8.0.1 Release 1999)33.070.50Globalni sistem za mobilno telekomunikacijo (GSM)Global System for Mobile Communication (GSM)ICS:Ta slovenski standard je istoveten z:EN 302 403 Version 8.0.1SIST EN 302 403 V8.0.1:2003en01-december-2003SIST EN 302 403 V8.0.1:2003SLOVENSKI
STANDARD



SIST EN 302 403 V8.0.1:2003



ETSIEN302403V8.0.1(2000-10)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephonySystem(CTS),Phase1;Servicedescription;Stage1(GSM02.56version8.0.1Release1999)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)2(GSM02.56version8.0.1Release1999)ReferenceREN/SMG-010256Q8KeywordsDigitalcellulartelecommunicationssystem,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 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)3(GSM02.56version8.0.1Release1999)ContentsIntellectualPropertyRights.5Foreword.5Introduction.61Scope.72References.73Definitionsandabbreviations.83.1Definitions.83.2Abbreviations.94Description.94.1Systemoverview.94.2Serviceaspects.104.2.1General.104.2.2Useraspects.114.2.3Subscriptions.114.2.3.1CTS-roamingaspects.114.2.3.2WithdrawalofCTSsubscription.124.2.4GSMcoverage.124.2.5Mobility.124.2.5.1ModeselectionbetweenCTSandPLMN.124.2.5.2AttachmentofthesameCTS-MSwithmultipleCTS-FPs.134.2.5.3AttachmentofmultipleCTS-MSswiththesameCTS-FP.134.2.5.4AttachmentstatusofaCTS-MS.134.2.6CTSapplications.134.2.6.1Tele-services.134.2.6.2Supplementaryservices.144.2.6.3Additionalsupportforfixednetworksupplementaryservices.144.2.6.4ManMachineInterface(MMI).144.2.6.5CTSinternalcalls.144.2.6.6CTSinternalcalltransfer.144.2.6.7CTSinternalcallhold.144.2.6.8Mobilehunting.144.2.6.9SMS-MT.144.2.6.10SMS-MO.154.2.6.11Otherservices.154.3RadiointerfaceandGSMco-existenceaspects.154.3.1Generalprinciples.154.3.2Broadcastchannelfunctionality.154.4Securityrequirements.154.4.1General.154.4.2Enrolment.164.4.3Attachment.164.4.4Protectionofcommunications.164.4.5SecurityParameterStorageRequirements.164.4.6De-activation.175NormalProcedures.175.1EnrolmentofCTS-FP.175.1.1CTSoperatorprocedureforenrolmentofCTS-FP.175.1.2UserprocedureforenrolmentofCTS-FP.175.2EnrolmentofCTS-MSs.185.3De-enrolmentofaCTS-MS.185.4AttachmentofCTS-MS.185.5Callprocedures.195.5.1CTS-MSoriginatedcalls.19SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)4(GSM02.56version8.0.1Release1999)5.5.1.1NumbercompatibilitybetweenGSMformatsandfixednetworkformats.195.5.2CTS-MSterminatedcalls.195.5.3CTSinternalcalls(optional).205.5.4CTSinternalcalltransfer(optional).205.6Maintenance.206CTSde-activation.216.1CTS-FPde-activationbytheCTSoperator.216.2CTS-FPde-activationbytheuser.216.3CTS-FPde-activationbyselfcontrollingfeatures.216.4CTS-MSde-activationbytheCTSoperator.217Exceptionalprocedures.218Chargingaspects.219CrossPhaseCompatibility.22AnnexA(informative):LaterphasesofCTS.23AnnexB(informative):Changehistory.24History.25SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)5(GSM02.56version8.0.1Release1999)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).Thepresentdocumentspecifiesthestage1descriptionfortheCordlessTelephonySystem(CTS)withinthedigitalcellulartelecommunicationssystem.ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocument,itwillbere-releasedbySMGwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version8.x.ywhere:8IndicatesGSMPhase2+Release1999;xtheseconddigitisincrementedfortechnicalenhancements,corrections,updates,etcythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthepresentdocument:29September2000Dateoflatestannouncementofthepresentdocument(doa):31December2000DateoflatestpublicationofnewNationalStandardorendorsementofthepresentdocument(dop/e):30June2001DateofwithdrawalofanyconflictingNationalStandard(dow):30June2001SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)6(GSM02.56version8.0.1Release1999)IntroductionToday,thereexistsacleardistinctionbetweenthepublicmobiletelephonesystemsforwideareacoverageontheonehand,andprivatecordlesstelephonesystemsforlocalareacoverageontheotherhand.Recently,attemptshavebeenmadetointegratethewideareacellularandthelocalareacordlessfunctionintooneandthesameMobileEquipment(ME).However,becauseoftheincompatibilitybetweentheexistingcellularandcordlessstandards,thisresultsinMEimplementationswithratherlowcost-efficiency.TheintentionoftheGSMCordlessTelephonySystem(CTS)isthereforetoprovidecordlessfunctionalitytoastandardGSMMobileStation(MS)withminimumimpactontheMS.TheimpactwouldideallybelimitedtoanupgradeoftheMEandSIMsoftware.Thiscanonlybeaccomplishediftheradiointerfaceofthecordlesssystemisidentical,orverysimilar,tothestandardGSMradiointerface.SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)7(GSM02.56version8.0.1Release1999)1ScopeThescopeofthepresentdocumentistodescribetheServiceaspectsofaGSMCordlessTelephonySystem(CTS),whichprovidesthepossibilityforusersofGSMterminalstohavecordlessaccesstoafixednetwork,suchasPSTN/ISDNoraradionetworksuchasGSM.Duetothetimeconstraintstohaveafirstspecificationreadyformarketneeds,aphasedapproachisnecessary.Thefirstphaseaimsprimarilyatanapplicationsupportingthespeechteleservice(includingDTMFsupport)inaresidentialsinglecellenvironment.Thefocusisontherequirementsnecessarytoelaboratetheradiointerfaceandthesecurityaspectsforsuchanapplication.TonotpreventorimpedetheevolutionofCTStoadditionalservicesandfunctions,laterphasesmayhavetobeconsideredwhennowdefiningthemeanstofulfiltheabovementionedrequirementsforthefirstphaseofCTS.Therefore,additionalsupportontheCTSradiointerfaceforlaterphaseservices(e.g.SMS,subscriberauthenticationandGSMsupplementaryservices),isincludedalreadyinCTSPhase1,providedthatsuchservicesareclearlydefined.OtherexpectedservicesandfunctionsinlaterphasesareincludedinannexA.ThestandardisationofthephysicallayersoftheGSM-CTSfixednetworkinterfaceisnotinthescopeofthepresentdocument.However,considerationmayneedtobegiventocommunicationofapplicationdatabetweenCTSandPLMNviathefixednetwork.2ReferencesThefollowingdocumentscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthepresentdocument.• Referencesareeitherspecific(identifiedbydateofpublication,editionnumber,versionnumber,etc.)ornon-specific.• Foraspecificreference,subsequentrevisionsdonotapply.• Foranon-specificreference,thelatestversionapplies.• Anon-specificreferencetoanETSshallalsobetakentorefertolaterversionspublishedasanENwiththesamenumber.• ForthisRelease1999document,referencestoGSMdocumentsareforRelease1999versions(version8.x.y).[1]GSM01.04:"Digitalcellulartelecommunicationsystem(Phase2+);Abbreviationsandacronyms".[2]GSM02.07:"Digitalcellulartelecommunicationssystem(Phase2+);MobileStations(MS)features".[3]GSM02.09:"Digitalcellulartelecommunicationssystem(Phase2+);Securityaspects".[4]GSM02.81:"Digitalcellulartelecommunicationsystem(Phase2+);LineidentificationSupplementaryServices-Stage1".[5]GSM02.96:"Digitalcellulartelecommunicationsystem(Phase2+);NameidentificationSupplementaryServices-Stage1".[6]GSM03.40:"Digitalcellulartelecommunicationssystem(Phase2+);ShortMessageService(SMS)".[7]ETS300111(1992):"IntegratedServicesDigitalNetwork(ISDN);Telephony3,1kHzteleservice,servicedescription".[8]ETS300109(1992):"IntegratedServicesDigitalNetwork(ISDN);Circuit-mode64kbit/s8kHzstructuredbearerservicecategoryusableforspeechinformationtransfer,servicedescription".SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)8(GSM02.56version8.0.1Release1999)[9]ETS300110(1992):"IntegratedServicesDigitalNetwork(ISDN);Circuit-mode64kbit/s8kHzstructuredbearerservicecategoryusablefor3,1kHzaudioinformationtransfer,servicedescription".[10]EN301144-1(V1.1):"TheSignallingapplicationforthemobilitymanagementserviceonthealphainterface;Part1:Protocolspecification".[11]GSM02.30:"Digitalcellulartelecommunicationsystem(Phase2+);ManMachineInterface(MMI)oftheMobileStation(MS)".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:FPEnrolment:procedurewhereaCTS-FPisloadedwithdatanecessarytoobtainCTSoperation.AfterthisprocedureCTSoperationmaycommence.MSEnrolment:procedurewhereaCTS-MSisassociatedforthefirsttimewithaCTS-FP.AfterthisprocedureCTS-MShasaccesstothisCTS-FP.Attachment:procedurewhereanMSattachestoacertainCTS-FP.Whenattached,itispossibletomakeandreceivecallsviatheCTS-FP.TheCTS-MSmusthavebeeninitialisedcorrectlytotheCTS-FPbeforeattachmentcantakepart.GenericFrequencyList(GFL):GenericFrequencyList(GFL)containsallabsoluteradiofrequencychannelnumbers(ARFCN),asdefinedinGSM05.05,onwhichtheCTS-FPisallowedtooperate.TheCTS-FPwillneverusefrequencieswhicharenotlistedintheGFL.CTSMobileStation:GSMMSwithCTScapability.CTSFixedPart:CTS-FPisadevicewhichoffersapersonnalcordlesscoverageandactsasalinkbetweentheCTS-MSandthefixednetworkortheGSMnetwork.GSMOperator:GSMoperatoristheoperatorwhoprovidesGSMcellularservicetotheMS.CTSlicenceexemptfrequencies:frequencybandthatmaybeallocatedbynationalregulatortoCTSusageoutsideofaGSMlicenceallocatedtoaGSMoperator.CTSoperator:CTSoperatoristheoperatorwhoprovidestheGFLtotheCTS-FP.TheCTSoperatormaybethesamethantheGSMoperator.FP-SIM:FP-SIMistheSIMcardinsertedintheCTS-FP,whichmaterialisedtheCTSsubscription.TheFP-SIMbelongstotheCTSoperator.CTSsubscription:whenaGSMlicensedbandisused,therighttouseaCTSoperator'sfrequencyspectrumforcommunicationbetweenaCTS-FPandCTS-MS(s).CTS-FPowner:personwhohastheCTS-FPcontrolandmayauthoriseMSEnrolment.CTSuser:personwhohasaCTS-MSwhichisallowedtodoCTSoperations.CTS-MSlocalnumber:numberintherangeof0-99optionallyassignedtotheCTS-MSatenrolment.ThisnumberisusedforCTSinternalcalls.CTS-Roaming:rightforanadditionalCTS-MStobeenrolledtoaCTS-FPwhichisinitialisedtoanoperatorotherthantheHPLMNoperatoroftheadditionalCTS-MS.SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)9(GSM02.56version8.0.1Release1999)3.2AbbreviationsInadditiontothosebelow,abbreviationsusedinthepresentdocumentarelistedinGSM01.04.CTSCordlessTelephonySystemCTS-FPCordlessTelephonySystem-FixedPartCTS-MSCordlessTelephonySystem-MobileStationFP–SIMFixedPart–SubscriberIdentityModuleGFLGenericFrequencyListIFPEIInternationalFixedPartEquipmentIdentityISDNIntegratedServicesDigitalNetworkMSMobileStationPSTNPublicSwitchedTelephoneNetworkSMS-MOShortMessageService-MobileOriginatedSMS-MTShortMessageService-MobileTerminated4Description4.1SystemoverviewTheGSMCordlessTelephoneSystem(GSM-CTS)describedinthepresentdocumentisaradiocommunicationssystembasedonaGSM-compatiblecellularinterfacebetweenaprivateradiobasestationcalledCTSFixedPart(CTS-FP)andaCTSmobilestation(CTS-MS).TheCTS-FPisconnectedeitherviaawirelinetothePSTN/ISDNnetworkorviaaradioconnectiontoaGSMnetwork.Whenconnectedtothefixednetwork,theCTS-FPwillbecompliantwiththeexistingfixednetworkstandards(e.g.supportthetelephony3,1kHzteleservice(see[7]),thespeechbearerservice(see[8])andthe3,1kHzaudiobearerservice(see[9]incaseofanISDNCTS-FPandtherelevantnationalstandardsincaseofPSTNCTS-FP).ThereisnodirectradiocommunicationbetweendifferentCTS-FPs.However,thisdoesnotprecludeindirectcommunication,e.g.viathefixednetworkorviatheMS.WhenconnectedtoaGSMnetwork,theCTS-FPiscompliantwiththeexistingETSIstandardsapplicabletoaGSMmobile.FromtheGSMnetworkpointofview,theCTS-FPisseenasastandardGSMmobileincludingastandardGSMSIMcard.(i.e.theCTS-FPmayinclude2SIMcards:onefortheGSMsubscriptionandonefortheCTSsubscription).AnillustrationoftheCTSconceptisshowninfigure1.DuetothelowtransmitpoweroftheCTS-FP,thecoverageareaisrestrictedandlimited.WhentheCTS-MScomesinrangeoftheCTS-FP,itmayattachtotheCTS.Whenconnectedtothefixednetwork,fromthenon,theusercanmakeandacceptcallsdirectlyviathePSTNwithouttheinterventionofthepubliccellularnetwork.Whenattached,theMScheckswhetheritisstillinrangeoftheCTSandwhetheritispaged.Asanoption,theMSmaysimultaneouslyworkinboththecellularandthecordlessmode,inasocalledparallelmode,i.e.beattachedbothintheGSMPLMNandtheCTS.WhentheMScomesoutofrangeoftheCTSitmayswitchtotheGSMmode.Thisswitchshallbeindicatedtotheuser.WhentheCTS-MSisineitherCTSmodeorGSMmodeandissearchingforapotentialchanneltoattachwithintheothermode,itshallbeabletorespondtopagingmessagesfromthemodeinwhichitiscurrentlyattached.TheradiointerfacebetweentheCTS-FPandtheCTS-MSisamodifiedGSMinterface.Thecarrierfrequenciesusedarethesameasassignedforcellularservice.Thesecarrierfrequenciescanbepartofalicenceexemptbandoralicensedband.WhenCTS-FPoperatesinalicencedband:-thesefrequenciescanbereservedbytheoperatorforGSM-CTSusage,orcanbesharedwiththecellularsystem.Ineverycase,however,theGSMoperatorcontrols,onanareaandtimebasis,onwhichfrequenciestheCTSisallowedtooperate.Incaseofco-existenceinthesameoperatingarea,aprocedureshallbedeployedtominimiseinterferencebetweenGSMPLMNandCTSusers.NOTE:ThefrequenciesusedforCTScouldbeinanyfrequencybanddefinedforGSM,i.e.GSM900,DCS1800orPCS1900.ThisappliesbothtotheCTS-FPandtheCTS-MS.SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)10(GSM02.56version8.0.1Release1999)Thequalityofservice(e.g.serviceaccessibility,callset-uptime,bitratefordataservices)ofthe'GSMonly'subscribersshallremainunaffectedbytheintroductionofCTS.MeanstoguaranteethatthequalityofserviceofGSMsubscribersdoesnotdegradeduetoCTSintroductionhavetobedefined.SincetheMSusesthesamefrequencyspectrumbothforthecellularmodeandthecordlessmode,theMEhardwarecanbereused.TheintentionisthathardwaremodificationsintheradiotransceiverofastandardGSMMEshouldnotbenecessary.ItisalsoarequirementthattheintroductionofCTSshallnotdestabiliseanyexistingGSMmobileequipmentordegradethemobileequipment'sdedicated(e.g.incall)oridlemodeperformance.Whenalicensedbandisused:-theCTSoperatorcanadministerallCTS-FPsandthecorrespondingCTS.WhentheCTSisinitialised,therequiredoperationparametersaredownloadedintotheCTS.ThiscaneitherbedoneviathefixednetworkorviatheGSMradiointerface.CTSFixedPartGSMPLMNGSMCTSGSMBTSFigure1:ConceptfortheGSMCTSfunctionalitywhenconnectedtothePSTN4.2Serviceaspects4.2.1GeneralInthefirstphaseofCTSanapplicationforresidentialenvironmentservingonecellisintended.Theservicesandfeaturestobesupportedrelatetothisassumption.SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)11(GSM02.56version8.0.1Release1999)4.2.2UseraspectsTheuseroftheCTSshallberequiredtoperformasimpleinstallationprocessinordertoinitialisetheCTSoperation.Thisprocessshallinclude:• connectionoftheCTS-FPtothepowersupplyandtoeitherthefixednetworkortheGSMnetworkinterface;• enrolmentoftheCTS-FP(CTS-FPenrolment).AstheCTS-FPshallnotbeGSMoperatorspecific,ithastobeenrolledwithoperationspecificdata,e.g.alistofallowedfrequencies(GenericFrequencyListGFL);• enrolmentofoneorseveralCTS-MSswiththeCTS-FP(CTS-MSenrolment).Onceinitialised,CTSoperationshallnotrequireanyspecificactionoftheusertomaintaintheoperationaslongastheCTS-FPisnotde-activated(seeclause6).TohaveservicegrantedbytheCTS-FP,aCTS-MSshallattachattheCTS-FP.Inordertoattach,aCTS-MShastobeenrolledwiththeCTS-FP,theuserhastobringtheCTS-MSinrangeoftheCTS-FPandtheappropriateoperationmodehastobeselected(seesubclause4.2.5.1).4.2.3SubscriptionsTheCTS-FPownershallhaveavalidCTSsubscriptionfromaCTSoperator.ThissubscriptionismaterialisedbyanFP-SIM.ItgivestherighttotheCTS-FPownertoinitialisetheCTS-FPandenrollCTS-MSsunderconditionsdefinedbytheCTSoperator.InexchangeofasubscriptiontoaCTSoperator,theCTS-FPownerwillreceiveaCTS-GFLintheCTS-FP.TheuseroftheGSMCTSserviceshallhaveasubscriptionwithaGSMoperator,whichallowsCTSservice.ThisCTSauthorisationmaybegiventoalltheCTS-MSsofaPLMNormaybelinkedtoaspecificservicesubscriptiongivenbytheGSMoperator.BydefaulttheCTS-MSarenotallowedtodoCTSoperations.TheuseofaGSMsubscriptionfor'CTSonly'serviceisnotprecluded.CorrespondinginformationmaybestoredintheSIM.InordertobeabletousetheCTSserviceonthefixednetwork,asubscriptiontothefixednetworkisalsorequired.WhenconnectedtotheGSMnetwork,thefixednetworksubscriptionisreplacedbyaGSMsubscriptionandtheCTS-FPshallincludeaGSMSIMcardcorrespondingtothisGSMsubscription.Thefixednetwork,GSMandCTSsubscriptionsmaybeindependentofeachother.HoweveratCTS-FPenrolment(seesubclause5.1)theCTS-FPmayobtainoperationdataspecifictotheCTSoperator,theuseroftheCTSservicehassubscribedto,thustheCTS-FPoperationmaybetiedtoaspecificGSMoperator.TheCTS-FPisnormallynotsubscribedto,itistheusers'property.AftertheCTSservicesubscriptiontooneoperatoriscancelled,itshallbepossibletousethesameCTS-FPforaCTSservicesubscriptiontoanotheroperator.4.2.3.1CTS-roamingaspectsACTS-FPownermayonlyhaveoneCTSsubscriptiontoasingleCTSoperator.ThisoperatordefineswhichCTS-MSsareallowedtoenrollontoaparticularCTS-FP.SeveralcontrollevelsareofferedbytheCTS:-uncontrolledroaming:allCTS-MSfromanyGSMoperatorareallowedtoenrolontheCTS-FPwithoutCTS-operatorcontrol;-noroaming:theCTS-operatorandtheGSMoperatorarethesameandonlytheCTS-MSsfromtheCTSoperatorareallowedtoattachontheCTS-FP;-controlroaming:onacasebycasebasis,theCTS-operatorcontrolsCTS-MSenrolmentusingCTS-MSIMSI.Inanycases,theCTS-FPownerauthorisationismandatoryforCTS-MSenrolment.NOTE:CTS-roaminghasnoimpactonCTS-FPoperationalmodedefinedbytheCTS-operator(e.g.frequencymanagement).SIST EN 302 403 V8.0.1:2003



ETSIETSIEN302403V8.0.1(2000-10)12(GSM02.56version8.0.1Release1999)4.2.3.2WithdrawalofCTSsubscriptionWhenusedwithinalicensedband:-iftheCTSsubscriptioniswithdrawn,theuserloosestherighttouseaCTS-operator'sfrequencyspectrumforCTSusageandCTSoperationshallstop.AstheCTSserviceisnotobtaineddirectlyfromtheGSMnetworklikeotherGSMservices(e.g.SMS),meansofsubscriptioncontrolhavetobedefined.4.2.4GSMcoverageTheconceptshouldallowCTSoperationduringallGSMcoveragescenarios,e.g.thefollowing:• areawithnoGSMcoverage;• areawithGSMcoverageoftheHPLMNoperator;• areawithnoHPLMNcoverage,butcoverageofotherPLMNoperator(s).Dependingontheenrolmentconceptbeingused(seesubclause5.1),alimitationmaybethattheMSneedtobeinHPLMN(oratleastPLMN)coverageonce,beforetheCTS-FPcanbecorrectlyinitialised(iftheGSMradiointerfaceisusedforenrolmentdatadownload).InthecaseofaCTS-FPconnectedtoaPLMN,aGSMcoverageisnecessaryforCTSoperations.4.2.5Mobility4.2.5.1ModeselectionbetweenCTSandPLMNTheCTS-MSmayoperateinoneofsixdifferentoperationmodes.ItisnotrequiredthattheCTS-MSsupportallthemodes.Itshallbepossiblefortheusertoselectbetweenthesupportedmodesatanytime,exceptduringanactivecall.a)Manualmode:GSMonly,i.e.thenormalGSMoperation.b)Manualmode:CTSonly,i.e.callscanonlybeoriginatedorreceivedviatheCTS-FP.TheMSisnotattachedtotheGSMPLMN.c)AutomaticmodewithCTSpreferred:TheMSattachestoCTS,wheninrange,andthenautomaticallytriestoattachwithGSMPLMN,whenoutofCTSrange.AnMSattachedwithaGSMPLMNandcominginrangeoftheCTSshallnotattachtoCTSifaconnectionintheGSMPLMNisactive.InthatcasetheMSshallwaituntiltheconnectionisfinished.d)AutomaticmodewithGSMpreferred:theMSattachestoGSMPLMN,wheninrange,andthenautomaticallytriestoattachwithCTS,whenoutofGSMPLMNrange.AMSattachedwithCTSandcominginrangeofaGSMPLMNshallnotattachtotheGSMPLMN,ifaconnectionintheCTSisactive.InthatcasetheMSshallwaituntiltheconnectionisfinished.e)Parallelmode-singleactivemode:theMStriestoattachwithbothGSMPLMNandCTS.IfaCTS-MSisattachedtobothCTS-FPandGSM,itshallofferdoubleserviceinidlemode(i.e.fullserviceonbothsystemsinidlemode),andatleastsingleserviceinactivemode(i.e.wheninvolvedinanactivecallononesystem,noserviceisrequiredontheothersystem).TechniquesshallavoidexcessivesignallingloadontheG
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