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)
General Information
- 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
Overview
SIST EN 302 404 V8.0.1:2003 specifies the lower layers of the radio interface for the GSM Cordless Telephony System (CTS), as part of GSM Phase 2+ (Release 1999). Adopted by the Slovenski inštitut za standardizacijo (SIST), this standard is harmonized with EN 302 404 (published by ETSI). It provides the technical basis for the implementation of cordless telephony services built on GSM technology, defining requirements for both fixed and mobile parts of a cordless system. The specification covers signaling, channel structure, frequency allocation, and radio resource management for integrated cordless operation within GSM networks.
Adhering to this standard ensures interoperability, optimized radio performance, and minimal interference with public GSM networks, supporting reliable deployment of private cordless GSM telephony.
Key Topics
CTS Radio Interface Structure
- Description of lower radio layers in the CTS, ensuring compatibility with GSM architecture.
- Definition of logical and physical channels for communication between CTS Fixed Part (FP) and CTS Mobile Station (MS).
Main Concepts
- Beacon Concept: Use of CTS Beacon Channel (CTSBCH) enables mobile stations to synchronize with a private base station only as needed, minimizing unnecessary signaling.
- Adaptive Frequency Allocation (AFA): Dynamic frequency management to avoid interference-based on local environment measurements.
- Total Frequency Hopping (TFH): Frequency selection and hopping strategies that average and minimize interference to neighboring GSM systems.
Channel and Frame Structure
- Definition of various logical channels, including traffic and control channels (TCH, SACCH, FACCH, CTSARCH, CTSAGCH, CTSPCH), and their mapping onto physical resources.
- Specification of multiframe and TDMA frame organizations tailored for GSM-CTS.
Transmission and Reception
- Alignment of CTS radio specifications with existing GSM standards, with adaptations for lower power output and reversed frequency bands for fixed and mobile parts.
Radio Resource Management
- Procedures for synchronization, frequency planning, interference measurement, and handover support.
- Mechanisms for idle and active state handling to optimize resource use.
Applications
This standard is vital for:
Private GSM Cordless Telephony
- Deployment of home or office cordless telephony systems fully interoperable with the public GSM network.
- Integration of GSM-based cordless phones for seamless, cost-effective communication.
Network Operator Services
- Allowing telecom operators to extend GSM services into private environments without compromising public network stability.
- Enabling flexible spectrum use and improved subscriber mobility management.
Device and Infrastructure Development
- Facilitates development of GSM-based fixed parts (base stations) and handsets that comply with standardized radio layer protocols.
- Supports manufacturers in ensuring compatibility with GSM Release 1999 features.
Interference Mitigation
- Reduces radio interference with overlaying GSM public land mobile networks (PLMN) and between nearby CTS installations through adaptive allocation and frequency hopping.
Related Standards
To support full implementation and interoperability, the following standards are referenced or related:
- GSM 01.04: Abbreviations and Acronyms
- GSM 02.56: CTS Service Description (Stage 1)
- GSM 03.22: Functions related to MS in idle and group receive mode
- GSM 03.20: CTS Security related network functions
- GSM 03.56: CTS Architecture Description (Stage 2)
- GSM 04.08: GSM Radio Interface Layer 3 Specification
- GSM 05.02: Multiplexing and multiple access
- GSM 05.03: Channel coding
- GSM 05.04: Modulation
- GSM 05.05: Radio transmission and reception
- GSM 05.08: Radio subsystem link control
- GSM 05.10: Subsystem synchronization
By aligning with these GSM standards, SIST EN 302 404 V8.0.1:2003 provides a robust framework for the deployment and development of GSM-compatible cordless telephony systems in both private and public environments.
Keywords: GSM, Cordless Telephony System (CTS), radio interface, adaptive frequency allocation, frequency hopping, TDMA, private network, interference management.
Get Certified
Connect with accredited certification bodies for this standard
ANCE
Mexican certification and testing association.
Intertek Slovenia
Intertek testing, inspection, and certification services in Slovenia.
LNE (Laboratoire National de Métrologie et d'Essais)
French national laboratory for metrology and testing.
Sponsored listings
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
Upgrade to R99
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
...