【正文】 ution IndChosen Encryption Algorithm(Serving)Configuration Envolution IndicationSMI:Subsequent Modification Indication,whether modification is allowed or notClassmark Information 1Phase1/Phase2 MSControlled Early Classmark Sending RF Power CapabilityA5/1 Classmark Information 3Multibands supported,EGSM/DCS1800/RGSMRF Power Capability for each bandA5/4,A5/5,A5/6,A5/7UCS2Handover FailureRR CauseCircuit PoolHandover Required RejectHandover Request ACKLayer3 InformationChosen ChannelChosen Encryption AlgorithmCircuit PoolCircuit Identity CodeHandover CommandCell IdentifierMS BSS MSCHANDOVER REQUIREDHANDOVER REQUIED(1)T7HANDOVER COMMANDHANDOVER REQUIRED REJECTHANDOVER REQUESTBSSHANDOVER FAILUREHANDOVER REQUEST ACKT8HANDOVER COMMANDHANDOVER ACCESSHANDOVER DETECTHANDOVER COMPLETEHANDOVER COMPLETECLEAR COMMANDCLEAR COMPLETECLEAR REQUESTHANDOVER FAILURE CLEAR COMMANDCLEAR COMPLETEHANDOVER FAILUREHandover DetectNo information element except for message typeHandover CompleteRR Cause15A接口信令Handover PerformedCauseCell IdentifierChosen ChannelChosen Encryption AlgorithmSpeech Version(Chosen)MS BSS MSCT8HANDOVER COMMANDCLEAR COMMANDCLEAR COMPLETECLEAR REQUESTHANDOVER FAILUREHANDOVER ACCESSHANDOVER COMPLETE HANDOVER PERFORMEDCauseUplink Quality Uplink StrengthDownlink Quality Downlink StrengthDistance Better CellTraffic Directed RetrySwitch Circuit Pool PreemptionOM Intervention16A接口信令Handover PerformedCauseCell IdentifierChosen ChannelChosen Encryption AlgorithmSpeech Version(Chosen)MS BSS MSCT10ASSIGNMENT COMMANDCLEAR COMMANDCLEAR COMPLETECLEAR REQUESTASSIGNMENT FAILUREASSIGNMENT COMPLETE HANDOVER PERFORMEDCauseUplink Quality Uplink StrengthDownlink Quality Downlink StrengthSwitch Circuit Pool OM Intervention17A接口信令MS BSS MSCPagingIMSITMSICell Identifier ListChannel NeededCell Identifier ListCell Identification discrimination:+CI Cell Cells on the BSSPAGINGPAGING REQUEST TYPE 1/2/3Channel NeededAny channel(default)SDCCHTCH/FTCH/H or TCH/F18A接口信令MS BSS MSCCM SERVICE REQUESTPAGING RESPONSECOMPLETE LAYER 3 INFORMATIONComplete Layer 3 InformationCell IdentifierLayer 3 InformationChosen ChannelCM REESTABLISHMENT REQUESTLOCATION UPDATING REQUESTIMSI DETACHExtract classmark information19A接口信令MS BSS MSCClassmark updateClassmark Information 2Classmark Information 3CLASSMARK REQUESTCLASSMARK ENQUIRYCLASSMARK CHANGE CLASSMARK UPDATE(option suppress or delay)CLASSMARK UPDATE(handover)20A接口信令MS BSS MSCCipher Mode CommandEncryption InformationCipher Response ModeCIPHER MODE COMMANDCIPHERING MODE COMMANDCIPHERING MODE COMPLETECIPHER MODE COMPLETECIPHER MODE REJECTEncryption InformationPermitted algorithm:A5/1,A5/2, A5/3,A5/4, A5/5,A5/6, A5/7KeyCipher response ModeIMSI must (not) be included by MSCipher Mode RejectCauseCauseCiphering algorithm not supportedInvalid message contentsCipher Mode CompleteLayer 3 message contentsChosen Encryption Algorithm21A接口信令BSS MSCASSIGNMENT REQUESTASSIGNMENT FAILUREQUEUING INDICATIONQueuing Indicationonly Message typeASSIGNMENT COMPLETECLEAR REQUEST(?)T11BSS MSCHANDOVER REQUESTHANDOVER FAILUREQUEUING INDICATIONHANDOVER REQUEST ACKHANDOVER FAILURETqho22A接口信令MS BSS MSCBLOCK/UNBLOCKBLOCKCircuit Identity CodeCauseConnection Release RequestedCauseNo radio resource availableOM intervention Equipment failureT1BLOCK/UNBLOCK ACKBLOCK/UNBLOCK ACKBLOCK/UNBLOCKT1Notify to OMBLOCK/UNBLOCK ACKNOWLEDGEUNBLOCK23A接口信令MS BSS MSCCIRCUIT GROUP BLOCK/UNBLOCKCIRCUIT GROUP BLOCKCauseCircuit Identity CodeCircuit Identity Code ListCauseNo radio resource availableOM intervention Equipment failureT20CIRCUIT GROUP BLOCK/UNBLOCK ACKCIRCUIT GROUP BLOCK/UNBLOCK ACKCIRCUIT GROUP BLOCK/UNBLOCKT20Notify to OMCIRCUIT GROUP BLOCK/UNBLOCK ACKNOWLEDGECircuit Identity CodeCircuit Identity Code ListCIRCUIT GROUP UNBLOCKCircuit Identity CodeCircuit Identity Code ListCircuit Identity Code ListRange,Max 255,from CIC to CIC+255Status,no indication/block 24A接口信令MS BSS MSCBLOCK/UNBLOCKBLOCKCircuit Identity CodeCauseConnection Release RequestedCauseNo radio resource availableOM intervention Equipment failureT21BLOCK/UNBLOCK ACKBLOCK/UNBLOCK ACKBLOCK/UNBLOCKT21Notify to OMBLOCK/UNBLOCK ACKNOWLEDGEUNBLOCK25A接口信令MS BSS MSCCIRCUIT GROUP BLOCK/UNBLOCKCIRCUIT GROUP BLOCKCauseCircuit Identity CodeCircuit Identity Code ListCauseNo radio resource availableOM intervention Equipment failureT22CIRCUIT GROUP BLOCK/UNBLOCK ACKCIRCUIT GROUP BLOCK/UNBLOCK ACKCIRCUIT GROUP BLOCK/UNBLOCKT22Notify to OMCIRCUIT GROUP BLOCK/UNBLOCK ACKNOWLEDGECircuit Identity CodeCircuit Identity Code ListCIRCUIT GROUP UNBLOCKCircuit Identity CodeCircuit Identity Code ListCircuit Identity Code ListRange,Max 255,from CIC to CIC+255Status,no indication/block 26A接口信令MS BSS MSCRESOURCE REQUESTPeriodicity100ms~25500msRESOURCE INDICATION(1/2/3/4)RESOURCE INDICATION(3)RESOURCE INDICATION(1) condition metPeriodResource RequestPeriodicityResource Indication MethodCell IdentifierExtended Resource IndicationResource Indication Method1:Spontaneous resource information expected 2:One single resource infoprmation expected3:Periodic resource information expected4: No resource information expectedExtended Resource IndicationSM:Subsequent Mode(only valid forRIM=2)0Method 41if RIM of before is 1 or 3, no changed。 otherwise, 4 TARR:Total Accessible Resource RequestedResource AvaliableBand1~Band5, number of idle FR/HRResource IndicationResource Indication MethodResource Avaliable