SIST EN 302 404 V8.0.1:2003
(Main)Digital cellular telecommunications system (Phase 2+) (GSM); GSM Cordless Telephony System (CTS), Phase 1; Lower Layers of the CTS Radio Interface; Stage 2 (GSM 03.52 version 8.0.1 Release 1999)
- Abstract
Upgrade to R99
- 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 302 404 V8.0.1:2003 is the Slovenian adoption of EN 302 404 Version 8.0.1 for the GSM Cordless Telephony System (GSM-CTS), Phase 1. It specifies the lower layers of the CTS radio interface for the CTS Fixed Part (CTS-FP) and CTS Mobile Station (CTS-MS), including radio transmission, logical channels, and radio resource procedures.
What does SIST EN 302 404 V8.0.1:2003 specify?
SIST EN 302 404 V8.0.1:2003 describes how GSM-CTS lower-layer radio operation is organized and controlled. The document is a Stage 2 specification: it covers the system behavior between the fixed network, the CTS-FP, and the CTS-MS, while pointing to other GSM-CTS documents for service description and architecture.
The standard is organized into clauses for references, definitions, radio-interface concepts, transmission and reception, modulation, coding, time structure, bursts, logical channels, lower-layer procedures, and radio resource management. It also includes two informative annexes.
| Annex | What it covers |
|---|---|
| Annex A | GSM backwards compatibility issues and three deployment scenarios |
| Annex B | Document change history |
What are the key requirements of SIST EN 302 404 V8.0.1:2003?
SIST EN 302 404 V8.0.1:2003 centers on interference control, synchronization, channel mapping, and radio resource handling.
- Clause 4 defines the CTS radio-interface concepts: beacon concept, Adaptive Frequency Allocation (AFA), and Total Frequency Hopping (TFH). In practice, this means the CTS-FP uses a periodic beacon channel and frequency management to reduce interference with the surrounding PLMN and other CTS systems.
- Clause 5 ties CTS radio transmission and reception to the GSM radio characteristics for P-GSM900, E-GSM900, DCS1800, and PCS1900. For implementers, the exact characteristics depend on system scenario calculations, so the standard frames CTS as a scenario-driven radio design.
- Clauses 6 to 9 define modulation, raw data rates, channel coding, interleaving, time slots, TDMA frames, and burst formats. The document uses Normal Burst (NB), Frequency Correction Burst (FB), and Synchronisation Burst (SB), and the CTS SB uses a specific training sequence to avoid confusing GSM-MS receivers.
- Clause 10 defines the logical channels: CTSBCH, CTSARCH, CTSAGCH, CTSPCH, SACCH, FACCH, and TCH/F. It also states how each channel is timed and how it maps to the physical channel structure, which is what equipment must follow for attach, paging, signalling, and speech.
- Clause 10 also gives the CTSBCH information fields, including status, CTSPCH presence, timeslot shifting, channel timeslot number, and FPBI. This matters because the beacon tells the CTS-MS whether the CTS-FP is available and where to look next.
- Clause 11 covers lower-layer procedures such as CTSBCH transmission, CTSBCH timeslot shifting, FB detection, SB decoding, DTX, interference measurements, and MS timing offset measurements. These procedures are the practical basis for synchronization and measurement behavior.
- Clause 12 defines RR Idle and RR Active states, initial synchronization, frequency management, alive check, dedicated RR connection establishment, radio link failure detection, RF power control, intracell handover, and channel release. In operation, this is the part that lets the CTS-MS and CTS-FP attach, keep the link up, and recover when quality drops.
What terms does SIST EN 302 404 V8.0.1:2003 define?
- GSM-CTS - A Cordless Telephony System based on GSM.
- CTS-FP - The device that acts as the link between the CTS-MS and the fixed network.
- CTS-MS - A GSM-MS that supports CTS operation.
- GFL - The Generic Frequency List of frequencies allowed for CTS use.
- AFA - Adaptive Frequency Allocation, the ranking method that uses interference measurements to exclude badly interfered frequencies.
- TFH - Total Frequency Hopping, the hopping method used to spread interference across frequencies.
- FPBI - Fixed Part Beacon Identity, the field carried in CTSBCH-SB to identify the CTS-FP.
- CTSMSI - The CTS identity used by signalling procedures such as access requests and paging.
Who uses SIST EN 302 404 V8.0.1:2003?
SIST EN 302 404 V8.0.1:2003 is used by engineers who design CTS-MS and CTS-FP equipment, by chipset and protocol developers, and by test labs verifying radio behavior. It is also relevant to network planners and quality managers who need to understand frequency use, interference control, and compatibility when CTS is deployed near a PLMN.
It is especially useful where a cordless system is intended to share spectrum with GSM networks and must manage access, paging, synchronization, and power control in a controlled way.
What changed in SIST EN 302 404 V8.0.1:2003 from the previous edition?
The foreword states that the publication number was changed from 301404 to 302404 because 301404 was reserved and had been allocated accidentally. Annex B records a publication update to version 8.0.1 after version 8.0.0, and it also notes an earlier change to the access request operation in the 7.x line.
Which standards are used with SIST EN 302 404 V8.0.1:2003?
Clause 2 relies on these GSM references:
- GSM01.04 - abbreviations and acronyms
- GSM02.56 - CTS service description, Stage 1
- GSM03.20 - CTS security-related network functions
- GSM03.22 - MS idle mode and group receive mode
- GSM03.56 - CTS architecture description, Stage 2
- GSM04.08 - layer 3 mobile radio interface
- GSM05.02 - multiplexing, multiple access, and frame structure
- GSM05.03 - channel coding and interleaving
- GSM05.04 - modulation
- GSM05.05 - radio transmission and reception
- GSM05.08 - radio subsystem link control
- GSM05.10 - radio subsystem synchronization
What does the SIST EN 302 404 V8.0.1:2003 document contain?
The document contains the channel formats, timing rules, and mapping diagrams for the CTS radio interface. Figures 1 and 2 show the 52-multiframe and 26-multiframe structure, and Figure 3 gives the frequency-management overview.
It also provides the procedures for beacon transmission, access, paging, alive check, synchronization, interference measurement, and dedicated connection handling. Annex A adds a scenario-based study of GSM backward compatibility, and Annex B records the document change history.
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Frequently Asked Questions
SIST EN 302 404 V8.0.1:2003 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Digital cellular telecommunications system (Phase 2+) (GSM); GSM Cordless Telephony System (CTS), Phase 1; Lower Layers of the CTS Radio Interface; Stage 2 (GSM 03.52 version 8.0.1 Release 1999)". This standard covers: Upgrade to R99
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SIST EN 302 404 V8.0.1:2003 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 302 404 V8.0.1:2003 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); GSM Cordless Telephony System (CTS), Phase 1; Lower Layers of the CTS Radio Interface; Stage 2 (GSM 03.52 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 302 404 Version 8.0.1SIST EN 302 404 V8.0.1:2003en01-december-2003SIST EN 302 404 V8.0.1:2003SLOVENSKI
STANDARD
ETSIEN302404V8.0.1(2000-09)EuropeanStandard(Telecommunicationsseries)Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephonySystem(CTS),Phase1;LowerLayersoftheCTSRadioInterface;Stage2(GSM03.52version8.0.1Release1999)GLOBALSYSTEMFORMOBILECOMMUNICATIONSRSIST EN 302 404 V8.0.1:2003
ETSI2ETSIEN302404V8.0.1(2000-09)(GSM03.52version8.0.1Release1999)ReferenceREN/SMG-020352Q8KeywordsDigitalcellulartelecommunicationssystem,GlobalSystemforMobilecommunications(GSM),GSMCordlessTelephonySystem(CTS)ETSI650RoutedesLuciolesF-06921SophiaAntipolisCedex-FRANCETel.:+33492944200Fax:+33493654716SiretN°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:editor@etsi.frCopyrightNotificationNopartmaybereproducedexceptasauthorizedbywrittenpermission.Thecopyrightandtheforegoingrestrictionextendtoreproductioninallmedia.©EuropeanTelecommunicationsStandardsInstitute2000.Allrightsreserved.SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)3(GSM03.52version8.0.1Release1999)ContentsIntellectualPropertyRights.6Foreword.61Scope.72References.73Definitionsandabbreviations.83.1Definitions.83.2Abbreviations.84MainconceptsoftheCTSradiointerface.84.1Beaconconcept.84.2AdaptiveFrequencyAllocation(AFA)concept.94.3TotalFrequencyHopping(TFH)concept.95RadioTransmissionandReception.95.1FrequencyBandandChannelArrangement.95.2ReceiverCharacteristics.95.2.1CTS-MScharacteristics.95.2.2CTS-FPcharacteristics.95.3TransmitterCharacteristics.105.3.1CTS-MScharacteristics.105.3.2CTS-FPcharacteristics.105.4CTStransmitter/receiverperformance.106ModulationandRawDataRates.107ChannelCodingandInterleaving.108TimeSlotsandTDMA-Frames.109Bursts.1110LogicalChannels.1110.1CTSBeaconChannel(CTSBCH).1110.1.1CTSBCHformat.1110.1.2CTSBCHtiming.1210.1.3CTSBCHradiofrequencychannel.1210.1.4CTSBCH-SBinformation.1210.2CTSAccessRequestChannel(CTSARCH).1210.2.1CTSARCHformat.1210.2.2CTSARCHtiming.1210.2.3CTSARCHradiofrequencychannel.1310.2.4CTSARCHinformation.1310.3CTSAccessGrantChannel(CTSAGCH).1310.3.1CTSAGCHformat.1310.3.2CTSAGCHtiming.1310.3.3CTSAGCHradiofrequencychannel.1310.3.4CTSAGCHinformation.1410.4CTSPagingChannel(CTSPCH).1410.4.1CTSPCHformat.1410.4.2CTSPCHtiming.1410.4.3CTSPCHradiofrequencychannel.1410.4.4CTSPCHinformation.1410.5SACCH.1410.6FACCH.1510.7TCH.1510.8MappingoftheLogicalChannelsontoPhysicalChannels.1510.8.1Mappingintimeofthelogicalchannelsontothephysicalchannels.15SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)4(GSM03.52version8.0.1Release1999)10.8.2Mappinginfrequencyofthelogicalchannelsontothephysicalchannels.1610.8.3PermittedChannelCombinations.1611LowerLayerProcedures.1711.1CTSBCHtransmission.1711.2CTSBCHtimeslotmanagement.1711.3CTSBCH-FBdetection.1711.4CTSBCH-SBdecoding.1711.5Discontinuoustransmission(DTX).1711.6Interferencemeasurements.1711.7MStimingoffsetmeasurements.1812RadioResourceManagementProcedures.1812.1RadioResourcesmanagementstates.1812.2Generalprocedures.1812.2.1InitialsynchronizationofaCTS-MSandCTS-FP.1812.2.2Frequencymanagement.1812.2.2.1Interferencemeasurementsexchange.1912.2.2.2AdaptiveFrequencyAllocation(AFA)algorithm.1912.2.2.3AFA/TFHinterworking.1912.2.2.4CTSBCHfrequencyselection.1912.2.3CTSBCH-SBinformation.2012.2.4ControlofCTS-FPservicerange.2012.2.5CTS-FPselection.2012.3RRIdlestateprocedures.2012.3.1CTSBCHmonitoring.2012.3.2Alivecheck.2012.3.3EstablishmentofadedicatedRRconnection.2012.3.3.1Timeslotassignmentfordedicatedconnection.2012.3.3.2CTS-MSinitiatedRRconnectionestablishment.2112.3.3.2.1Non-hoppingaccessprocedure.2112.3.3.2.2Hoppingaccessprocedure.2112.3.3.3CTS-FPinitiatedRRconnectionestablishment.2112.3.4CTSBCHfailuredetection.2212.4RRActivestateprocedures.2212.4.1Radiolinkfailuredetection.2212.4.2RFpowercontrol.2212.4.3Intracellhandover.2212.4.4Channelrelease.22AnnexA(informative):GSMbackwardscompatibilityissues.23A.1ReasonsforpossibleimpactofaCTS-FPonaGSM-MSinthePLMN.23A.1.1PowermeasurementofBCCHcarrier.23A.1.1.1PoweronCTS-FPbeaconfrequencyseenbytheGSM-MSincellselection.23A.1.1.2PoweronCTS-FPhoppingfrequenciesseenbytheGSM-MSincellselection.24A.1.2SynchronisationofaGSM-MS.24A.2Scenario1:PLMNandCTS-GFLhavenocommonfrequencyinwholecoveragearea.24A.2.1CellSelection.24A.2.1.1GSM-MShasnoBAliststoredontheSIM.24A.2.1.2GSM-MShasastoredBAlistontheSIM(optional).24A.2.2Cellreselection.25A.2.3Handover.25A.3Scenario2:PLMNandCTS-GFLhavelocallynocommonfrequency.25A.3.1CellSelection.25A.3.1.1GSM-MShasnoBAliststoredontheSIM.25A.3.1.2GSM-MShasastoredBAlistontheSIM(optional).25A.3.2Cellreselection.25A.3.2.1GSM-MScampingonitshomePLMN.25A.3.2.2GSM-MScampingonavisitedPLMNinhomecountry.26A.3.3Handover.26SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)5(GSM03.52version8.0.1Release1999)A.4Scenario3:PLMNandCTS-GFLhavelocallysomecommonfrequencies.26A.4.1Cellselection.26A.4.2Cellreselection.26A.4.3Handover.27A.5Conclusion.27AnnexB(informative):Documentchangehistory.28History.29SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)6(GSM03.52version8.0.1Release1999)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).ThepresentdocumentwassubmittedtoOne-stepApprovalwiththeETSInumber301404.Forpublicationthenumberwaschangedto302404becausethenumber301404isreservedandwasallocatedaccidentally.ThepresentdocumentgivesanoveralldescriptionofthelowerlayersoftheradiointerfaceforGSMbasedCordlessTelephonySystems.ThecontentsofthepresentdocumentissubjecttocontinuingworkwithinSMGandmaychangefollowingformalSMGapproval.ShouldSMGmodifythecontentsofthepresentdocumentitwillbere-releasedwithanidentifyingchangeofreleasedateandanincreaseinversionnumberasfollows:Version8.x.ywhere:8indicatesRelease1999ofGSMPhase2+.xtheseconddigitisincrementedforallchangesofsubstance,i.e.technicalenhancements,corrections,updates,etc.ythethirddigitisincrementedwheneditorialonlychangeshavebeenincorporatedinthespecification.NationaltranspositiondatesDateofadoptionofthisEN:25August2000DateoflatestannouncementofthisEN(doa):30November2000DateoflatestpublicationofnewNationalStandardorendorsementofthisEN(dop/e):31May2001DateofwithdrawalofanyconflictingNationalStandard(dow):31May2001SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)7(GSM03.52version8.0.1Release1999)1ScopeThepresentdocumentgivesanoveralldescriptionofthelowerlayersoftheradiointerfaceforGSMbasedCordlessTelephonySystems(GSM-CTS).TheGSM-CTSsystemisintendedtoprovideacordlessconnectionbetweenthefixednetworkandGSM-basedCTSMobileStations(CTS-MS)viaaprivateCTSFixedPart(CTS-FP).Stage1isanoveralldescription,fromtheservicesubscribersanduser'sstandpoint,thatviewthenetworkasasingleentitywhichprovidesservicetotheuser.GSM02.56containstheCTSStage1servicedescription.GSM03.56isaStage2documentthatdescribesthesystemarchitectureoftheGSMCordlessTelephoneSystems(GSM-CTS),i.e.thesystemelements,thesysteminterfacesandthefunctionalcapabilities.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:"Digitalcellulartelecommunicationssystem(Phase2+);AbbreviationsandAcronyms".[2]GSM02.56:"Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephoneSystem(CTS);ServiceDescription;Stage1".[3]GSM03.22:"Digitalcellulartelecommunicationssystem(Phase2+);FunctionsrelatedtoMobileStation(MS)inidlemodeandgroupreceivemode".[4]GSM03.20:"Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephoneSystem(CTS);Securityrelatednetworkfunctions;Stage2".[5]GSM03.56:"Digitalcellulartelecommunicationssystem(Phase2+);GSMCordlessTelephonySystem(CTS);CTSArchitectureDescription;Stage2".[6]GSM04.08:"Europeandigitalcellulartelecommunicationssystem(Phase2+);Mobileradiointerfacelayer3specification".[7]GSM05.02(V6.3):"Digitalcellulartelecommunicationssystem(Phase2+);Multiplexingandmultipleaccessontheradiopath".[8]GSM05.03(V6.1):"Digitalcellulartelecommunicationssystem(Phase2+);Channelcoding".[9]GSM05.04:"Digitalcellulartelecommunicationssystem(Phase2+);Modulation".[10]GSM05.05:"Digitalcellulartelecommunicationssystem(Phase2+);Radiotransmissionandreception".[11]GSM05.08:"Digitalcellulartelecommunicationssystem(Phase2+);Radiosubsystemlinkcontrol".SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)8(GSM03.52version8.0.1Release1999)[12]GSM05.10:"Digitalcellulartelecommunicationssystem(Phase2+);Radiosubsystemsynchronization".3Definitionsandabbreviations3.1DefinitionsForthepurposesofthepresentdocument,thefollowingtermsanddefinitionsapply:CTSMobileStation:GSM-MSsupportingCTS.CTSFixedPart:CTS-FPisadevicewhichactsasalinkbetweentheCTS-MSandthefixednetwork.GSM-CTS:CordlessTelephonySystembasedonGSM.3.2AbbreviationsThefollowinglistdescribestheabbreviationsandacronymsusedinthepresentdocument.TheGSMabbreviationsexplainedinGSM01.04[1]arenotincludedbelow.AFAAdaptiveFrequencyAllocationCTSCordlessTelephonySystemCTSAGCHCTSAccessGrantCHannelCTSARCHCTSAccessRequestCHannelCTSBCHCTSBeaconCHannelCTS-FPCTSFixedPartCTS-MSCTSMobileStationCTSMSICTSMobileSubscriberIdentityCTSPCHCTSPagingCHannelDPLMNDonorPublicLandMobileNetworkFPBIFixedPartBeaconIdentityGFLGenericFrequencyListRXReceiveTFHTotalFrequencyHoppingTXTransmit4MainconceptsoftheCTSradiointerfaceThemainassumptionbehindtheCTSworkitemandinparticulartheCTSradiointerface,isthatamodifiedsingletimeslotstateoftheartGSM-MSchipsetcouldbeusedforahomebasestation,i.e.asaCTS-FP.TheCTSradiointerfacehasbeendesignedtomeetarequirementoflowgeneratedinterference,eitherfromtheCTStoexistingoverlayingPLMNS,eitherfromaCTStoanotherCTS.Thisrequirementisachievedbythecombinedusageofthethreeconcepts:beaconconcept,AFAconceptandTFHconcept.4.1BeaconconceptAlimitednumberofCTS-MSshallbeservedbyoneCTS-FP(seeGSM02.56).Therefore,abroadcastchannelcontinuouslytransmittedsuchastheBCCHinGSMisnotneededforCTS.AchannelcalledCTSbeaconchannel(CTSBCH)isproposedwiththefollowingmaincharacteristics:itistransmittedbytheCTS-FPevery26framesina52-multiframepattern,andallowstheCTS-MStosynchronisewiththeCTS-FP.MinimumsignallingisalsosupportedbytheCTSBCH,sothatitistheonlylogicalchannelaCTS-FPshallperiodicallytransmitontheCTSradiointerface.Everyotherlogicalchannelisonlytransmitted"ondemand".SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)9(GSM03.52version8.0.1Release1999)4.2AdaptiveFrequencyAllocation(AFA)conceptApreciseradiofrequencyplanningcannotbeappliedtotheCTS-FP/MSpair,astheCTSisintendedtobedeployedbytheend-user.Therefore,alistoffrequencies(theGFL)onwhichitisallowedtooperateisgiventotheCTS.WiththeAFA,interferencemeasurementswillbeperformedonthefrequenciesintheGFLtoprovidearankingintheAFAtable,inordertoexcludeunacceptablyinterferedfrequenciesfromtheusageinCTS.4.3TotalFrequencyHopping(TFH)conceptTheremainingfrequenciesareusedbytheTotalFrequencyHoppingalgorithminordertoreducetheinterferenceoftheCTSwiththeoverlayingPLMNandotherCTS-FP/MSpairs.WithTFHtheinterferencecausedbytheCTSlinkisspreadacrossmultipleGSMlinks(interferenceaveraging)andtheco-channelinterferenceisduetodifferentusersatdifferentlocations(interferencediversity).AnewhoppingalgorithmwhichisespeciallytailoredforuseinCTSwithimprovedperformancecomparedtotheGSMhoppingalgorithmsshallbeused.5RadioTransmissionandReceptionTheCTS-FPandCTS-MSshallinPhase1GSM-CTSconformtothetransmissionandreceptionspecificationsofatleastoneormoreofthefollowingcellularstandards:-P-GSM900;-E-GSM900;-DCS1800;-PCS1900.Thefinalchoiceofcharacteristicsandperformancerequirementsdependsonsystemscenariocalculations.5.1FrequencyBandandChannelArrangementThefrequencybandandchannelarrangementfortheGSM-CTSareasspecifiedinGSM05.05clause2.5.2ReceiverCharacteristics5.2.1CTS-MScharacteristicsItistheintentiontokeeptheCTS-MScharacteristicsinlinewiththeGSM-MScharacteristicsasspecifiedinGSM05.05clause5,butthefinaldecisiondependsonsystemscenariocalculations.5.2.2CTS-FPcharacteristicsItistheintentiontokeeptheCTS-FPcharacteristicsinlinewiththeGSM-MScharacteristicsasspecifiedinGSM05.05clause5,butwithreversedfrequencybands.Thefinaldecisiondependsonsystemscenariocalculations.SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)10(GSM03.52version8.0.1Release1999)5.3TransmitterCharacteristics5.3.1CTS-MScharacteristicsItistheintentiontokeeptheCTS-MScharacteristicsasfaraspossibleinlinewiththeGSM-MScharacteristicsasspecifiedinGSM05.05clause4,butthefinaldecisiondependsonsystemscenariocalculations.Inaddition,itisintendedtolowerthemaximumnominaloutputpowerandthelowestnominaloutputpowertovalueswhichshallbedeterminedbysystemscenariocalculations.BothvaluescouldbebelowthenominaloutputpowersspecifiedinGSM05.05subclause4.1.1.5.3.2CTS-FPcharacteristicsItistheintentiontokeeptheCTS-FPcharacteristicsasfaraspossibleinlinewiththeGSM-MScharacteristicsasspecifiedinGSM05.05subclause4,butwithreversedfrequencybands.Thefinaldecisiondependsonsystemscenariocalculations.Inaddition,itisintendedtolowerthemaximumnominaloutputpowerandthelowestnominaloutputpowertovalueswhichshallbedeterminedbysystemscenariocalculations.BothvaluescouldbebelowthenominaloutputpowersspecifiedinGSM05.05subclause4.1.1.5.4CTStransmitter/receiverperformanceItistheintentiontokeeptheCTStransmitter/receiverperformanceinlinewiththeGSMtransmitter/receiverperformanceasspecifiedinGSM05.05clause6.TheGSMrequirementonreceiverperformanceforfrequencyhoppingwherefrequenciesareinterferedshallbefulfilledbyboththeCTS-MSandCTS-FP.6ModulationandRawDataRatesThemodulationtechniqueandrawdataratesareasspecifiedinGSM05.04.7ChannelCodingandInterleavingThechannelcodingalgorithmandinterleavingschemesofexistingGSMchannelsusedintheGSMCTSradiointerfaceareasspecifiedinGSM05.03.Channelcodingalgorithmsandinterleavingschemesfornewlogicalchannelsaredefinedinclause10.8TimeSlotsandTDMA-FramesThetimeslotorganisationisasspecifiedinGSM05.02subclause4.3.1.TheTDMAframesareorganisedinmultiframes,superframes,andhyperframes.Thehyperframeisthelongestrecurrenttimeperiodandconsistsof26x51x2048TDMAframes.TheTDMAframesarenumberedmodulothishyperframe,whichmeansthattheframenumberFNrangesfrom0toFN_MAX=(26x51x211)-1=2715647.TheCTS-FPkeepstrackoftheframenumberingonceinitialised.TwotypesofmultiframesexistintheGSM-CTSsystem:-a26-multiframewithadurationof120ms,comprising26TDMAframes.ThismultiframeisusedtocarryTCH,SACCH,andFACCH(seeclause10);SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)11(GSM03.52version8.0.1Release1999)-a52-multiframewithadurationof240ms,comprising52TDMAframes.ThismultiframeisusedtocarryCTSBCH,CTSARCH,CTSAGCHandCTSPCH(seeclause10),andisindicatedasCTSBCHmultiframe.NOTE:GSM-CTSusesaschemeslightlydifferentfromtheGSM-basedframestructureinthatinsteadof51-multiframes,52-multiframesareused.ThereasonforthischoiceisthattheburstsoftheCTSBCHhaveaframedistancethatcoincideswiththeidleframesofaTCH/Fconnection;itisthereforepossibletosupportintheCTS-FPaspeechconnectionandtheCTSBCHtransmissioninparallelonthesametimeslot,whichallowstherealisationoftheCTS-FPhardwarewithastateoftheartchipsetforaGSM-MSsupportingonlyasingletimeslot.9BurstsInthephysicallayeroftheGSM-CTSsystem,threetypesofburstformatsareused:-NormalBurst(NB);-FrequencyCorrectionBurst(FB);-SynchronisationBurst(SB).TheyareasspecifiedinGSM05.02subclause5.2,withthedifferencethatthesynchronisationburstsusedinGSM-CTSshallhaveaspecifictrainingsequence,inordertoavoidmisleadingdetectionofaGSM-CTSsynchronisationburstsbyaGSM-MS.10LogicalChannelsFortheGSM-CTSsystem,eightlogicalchannelshavebeenspecified.ThereisonetrafficchannelTCH/F,andtherearesixsignallingchannelsCTSBCH,CTSARCH,CTSAGCH,CTSPCH,SACCH,andFACCH.10.1CTSBeaconChannel(CTSBCH)TheCTSBCHlogicalchannelisusedtoprovidefrequencyandsynchronisationinformationinthedownlinkdirection.FromthisinformationtheCTS-MSisabletosynchroniseandtorecognisetheidentityoftheCTS-FP.ItismadeupofapairofCTSBCH-SBandCTSBCH-FBtransmittedinevery52-multiframe.SignallingmechanismshavebeendefinedinordertoreduceemissionsfrombothCTS-FPandCTS-MS.IncaseswheretheCTS-FPhasnoresourcestohandleaccessesfromaCTS-MS,theCTSBCHshallindicatethatnoCTS-MSshallattempttoaccesstheCTS-FP.InordertoavoidcontinuousbroadcastingoftheCTSPCH,signallingisprovidedontheCTSBCHthatindicatesthepresenceoftheCTSPCH.10.1.1CTSBCHformat-burst:-FrequencyCorrectionBurst(FB)isusedfortheCTSBCH-FB;-SynchronisationBurst(SB)isusedfortheCTSBCH-SB.-channelcodingscheme:CTSBCH-SBusesthesamechannelcodingschemeastheSCH,specifiedinGSM05.03subclause4.7.NochannelcodingisrequiredforCTSBCH-FB.SIST EN 302 404 V8.0.1:2003
ETSIETSIEN302404V8.0.1(2000-09)12(GSM03.52version8.0.1Release1999)10.1.2CTSBCHtimingThetimingoftheCTSBCHisasfollows(seefigure1):-frameposition:-FNmod52=25theCTSBCH-FBistransmitted;-FNmod52=51theCTSBCH-SBistransmitted.-timeslotposition:apairofCTSBCH-SBandCTSBCH-FBshallhavethesametimeslotpositionwithinone52-multiframebutthepositioncanchangefromone52-multiframetoanotheraccordingtotheBeacontimeslotmanagementprocedure(seesubclause11.2).10.1.3CTSBCHradiofrequencychannelTheCTSBCHistransmittedontheCTSBCHfrequencychannel,accordingtotheCTSBCHfrequencyselection,seesubclause12.2.2.10.1.4CTSBCH-SBinformationTheCTSBCH-SBcarries25informationbits.These25bitsshallbedividedintofivefieldsasfollows:-astatusfieldindicatingwhethertheCTS-FPhasanyradioresourceavailable;-aflagindicatingthepresenceoftheCTSPCHinthenext52-multiframe;-aflagindicatingwhethertheCTS-FPiscurrentlyperformingtimeslotshifting(seesubclause11.2)ontheCTSBCH;-afieldindicatingthetimeslotnumberoftheCTSARCH,CTSAGCHandCTSPCH;-theFPBIfieldindicatingtheidentityoftheCTS-FP,insuchawaythatinvalidattachmentattemptsbyCTS-MSwhicharenotenrolled(seeGSM03.56)withthisCTS-FPareminimised.10.2CTSAccessRequestChannel(CTSARCH)TheCTSARCHi
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