Gsm呼叫流程絕對(duì)經(jīng)典

GSM呼叫流程1整理課件目的和內(nèi)容目的介紹GSM正常的呼叫流程〔空中接口、A-bis接口和A接口〕介紹局部常見的異常中斷的流程內(nèi)容GSM網(wǎng)絡(luò)協(xié)議介紹GSM邏輯信道介紹無線鏈路建立流程〔RadioandLinkEstablishmentProcedure〕TCH正常分配流程〔NormalAssignmentProcedure〕主叫流程〔OriginatingCall〕被叫流程〔TerminatingCall〕位置更新流程〔LocationUpdating〕切換流程〔HandoverProcedure〕呼叫釋放流程〔CallReleaseProcedure〕信道釋放流程〔ChannelReleaseProcedure〕2整理課件GSM協(xié)議層數(shù)無線網(wǎng)絡(luò)優(yōu)化主要關(guān)心第三層的信令無線網(wǎng)絡(luò)優(yōu)化主要關(guān)心DTAP、RSL的信令無線網(wǎng)絡(luò)優(yōu)化主要關(guān)心DTAP、BSSMAP和局部SCCP的信令DTAPRSLOMLGSM網(wǎng)絡(luò)協(xié)議3整理課件Layer3介紹RR:無線資源管理〔RadioResourceManagement〕由MS、BTS和BSC控制功能舉例Paging管理〔PagingManagement〕加密管理〔CipheredModeManagement〕頻點(diǎn)分配〔FrequencyRedefinition〕信道分配〔DedicatedChannelAssignment〕切換〔HandoverManagement〕測量和功率控制〔MeasuresandPowerControl〕MM:移動(dòng)性管理〔MobilityManagement〕由MS和MSC/VLR控制功能舉例鑒權(quán)和身份識(shí)別〔Authentication/IdentificationProcedures〕位置更新〔LocationUpdating〕IMSIAttach/DetachGSM網(wǎng)絡(luò)協(xié)議4整理課件CC:呼叫控制〔CallControl〕由MS和MSC控制功能舉例呼叫處理和路由〔Callprocessingandrouting〕雙音多頻〔DTMFFacilities〕短消息效勞〔ShortMessageService〕附加效勞〔SupplementaryService〕GSM網(wǎng)絡(luò)協(xié)議5整理課件呼叫流程中常用的邏輯信道PCH尋呼信道〔PagingChannel〕RACH隨機(jī)接入信道〔RandomAccessChannel〕AGCH接入認(rèn)可信道〔AccessGrantChannel〕SDCCH獨(dú)立專用控制信道〔Stand-aloneDedicatedControlChannel〕SACCH慢聯(lián)系控制信道〔SlowAssociatedChannel〕TCH話務(wù)信道〔TrafficChannel〕FACCH快聯(lián)系控制信道〔FastAssociatedControlChannel〕GSM呼叫流程中常用的邏輯信道PCHRACHAGCHSDCCH+SACCHTCH/FACCH+SACCH6整理課件定義與網(wǎng)絡(luò)間建立一個(gè)無線鏈路，用于信令傳送包括以下四個(gè)步驟Paging過程〔PagingProcedure〕〔僅用于被叫流程中〕隨機(jī)接入過程〔RandomAccessProcedure〕立即分配過程〔ImmediateAssignmentProcedure〕SCCP聯(lián)接建立過程〔SCCPConnectionEstablishmentProcedure〕當(dāng)需要與網(wǎng)絡(luò)發(fā)生聯(lián)系時(shí)，必須要先建立無線鏈路和A接口的信令連接無線鏈路建立流程7整理課件MSBTSBSCMSCChannelRequestChannelRequiredChannelActivation〔SD〕ChannelActAck〔SD〕ImmediateAssignmentCommandUIImmAssignment/ImmAssExtST9103ET9103ST3126ET3126ST3101SABM[L3Info]EstInd[L3Info]SCCPConRqrd[L3]SCCPConnConfirmET3101ST9105ET9105UA[L3Info]〔RACH〕〔EstCause，RndNbr〕〔EstCause，RndNbr，TA〕RACH_TA_Filtering〔TA，BS/MS_TxPwr-->Max，Chann〕Timer；S--Start；E--EndEntity信令消息空中接口Abis接口A接口〔RndNbr，TDMAFrameNbr，Chan，TA〕〔AGCH〕同時(shí)對(duì)兩個(gè)MS分配SDCCH〔SDCCH〕BSC開始對(duì)MS發(fā)出的上行DTAP消息排隊(duì)〔如CMServAbort消息〕。如果收到MS發(fā)出的ClassmarkChange消息，BSC會(huì)在SCCP連接完成后發(fā)ClassmarkUpdate消息給交換機(jī)如CMServReq，PagRes，LocUpdateReq等SetAsynchronousBalanceMode。在任何新信道登陸時(shí)均會(huì)有SABM過程UnnumberedAck無線鏈路建立流程8整理課件無線鏈路建立流程——異常情況對(duì)不同的呼叫類型有不同的等待時(shí)間：WI_EC/CR/OC/OP.(OP主要指LU,被叫沒有相應(yīng)等待時(shí)間)SDCCH擁塞如果BSC在收到ChannelRequired時(shí)，相應(yīng)小區(qū)沒有空閑的SDCCH，BSC將會(huì)如果小區(qū)參數(shù)En_Imm_Ass_Rej=“True〞，那么發(fā)ImmediatelyAssignmentReject否那么忽略ChannelRequired消息T9103超時(shí)BSC發(fā)RFChannelRelease消息到BTSBSC收到ChannelActivationNAck消息BSC內(nèi)部釋放BTS的相應(yīng)無線信道(沒有任何消息在Abis接口上傳送)T3101超時(shí)Layer3無法建立BSC發(fā)RFChannelRelease到BTST9105超時(shí)BSC通過呼叫釋放過程〔CallReleaseProcedure〕釋放原先建立的SDCCH連接在A接口，BSC向MSC發(fā)SCCP釋放請求在RF局部，BSC向和BTS發(fā)信道釋放消息

僅在BSC內(nèi)部資源表中釋放，在Abis上沒有信令傳送當(dāng)信道激活不成功時(shí)觸發(fā)的BTSRFChanRel不包含PhysContReq過程9整理課件BSC收到EstablishIndication消息，但消息中不含Layer3InformationBSC向和BTS發(fā)信道釋放消息Abis上的其它異常中斷消息的處理BSC收到ErrorIndicationCause為:“T200Expiry〞:監(jiān)視SABM和UA過程“UnsolicitedDMResponse〞(發(fā)生在Disconnect過程中〕“SequenceError〞釋放：A接口上，BSC發(fā)ClearRequest“RadioInterfaceFailure〞到交換機(jī)BSC向和BTS發(fā)信道釋放消息BSC收到ConnectionFailureindication(Cause:RadioLinkFailure)在A接口上，BSC發(fā)ClearRequest“RadioInterfaceFailure〞到交換機(jī)BSC向BTS發(fā)RFChannelRelease消息BSC收到ReleaseIndication當(dāng)收到發(fā)出的DISC消息A接口上，BSC發(fā)ClearRequest“RadioInterfaceFailure〞到交換機(jī)BSC向和BTS發(fā)信道釋放消息無線鏈路建立流程——異常情況10整理課件MSBTSBSCMSCAuthenticationReqCipheringModeCmdAuthenticationReqAuthenticationReqAuthenticationRespAuthenticationRespAuthenticationRespEncryptionCommandCipheringModeCmdCipheringModeCmpCipheringModeCmpCipheringModeCmpTMSIReallocCmdTMSIReallocCmdTMSIReallocCmdTMSIReallocCmpTMSIReallocCmpTMSIReallocCmpAuthenticationCipheringTMSIReallocST3260ET3260*AuthenticationReject*IdentificationIdentificationRequestST3270ET3270IdentificationRequestIdentificationRequestIdentificationResponseIdentificationRespIdentificationResponseST3250ET3250〔RAND〕〔SRES〕RAND與Ki經(jīng)過A3算法得到SRES；經(jīng)過A8算法得到Kc比較SRES〔IMSI〕選擇加密算法〔PermittedAlg，Kc〕準(zhǔn)備解密接收〔Alg，Kc〕〔Alg〔A5算法〕〕開始加密發(fā)射和解密接收如正確解密接收，那么下條消息加密發(fā)射已加密的消息〔TMSI〕VLR從HLR處得到RAND/SRES/Kc鑒權(quán)、身份識(shí)別、加密、TMSI重新分配過程11整理課件鑒權(quán)過程中的異常情況鑒權(quán)失敗如果鑒權(quán)過程中使用TMSI，網(wǎng)絡(luò)將啟動(dòng)身份識(shí)別過程。如果送上來的IMSI與VLR中TMSI所對(duì)應(yīng)的IMSI不一致，那么重新進(jìn)行鑒權(quán)如果鑒權(quán)過程中已經(jīng)使用IMSI，那么網(wǎng)絡(luò)發(fā)AuthenticationReject消息。這個(gè)SIM將被認(rèn)為是無權(quán)的T3260超時(shí)第一次超時(shí)，網(wǎng)絡(luò)將重發(fā)鑒權(quán)請求；第二次超時(shí)，網(wǎng)絡(luò)將釋放該MM連接身份識(shí)別過程中的異常情況T3270超時(shí)第一次超時(shí)，網(wǎng)絡(luò)將重發(fā)身份識(shí)別請求；第二次超時(shí)，網(wǎng)絡(luò)將釋放該MM連接TMSI重新分配過程中的異常情況T3250超時(shí)第一次超時(shí)，網(wǎng)絡(luò)將重發(fā)TMSI重新分配請求；第二次超時(shí)，網(wǎng)絡(luò)將釋放該MM連接鑒權(quán)、身份識(shí)別、加密、TMSI重新分配過程——異常情況12整理課件定義分配TCH的過程特殊情況排隊(duì)〔Queuing〕直接重試〔DirectedRetry〕TCH分配過程13整理課件MSBTSBSCMSCChannelActivationTCHSABM(FACCH)ChannelActivationAck.AssignmentCommandAssignmentCommandAssignmentRequestPhysicalContextRequestPhysicalContextConfirmEstablishIndicationUAAssignmentCompleteAssignmentCompleteAssignmentCmpRFChannelRelease(SD)RFChannelReleaseAck.STrr1ETrr1ST9108ET9108ST9103ET9103ST3107ET3107〔ChnType，Priority，CIC，DLDTX，QueuingFlag〕〔TA，MS/BS_TxPwr〕〔SDCCH〕〔TA，MS/BS_TxPwr〕〔MA，TS，HSN，MAIO，MS_TxPwr〕占用TCH時(shí)，如需傳送信令，那么通過StealingFlag將TCH轉(zhuǎn)換成FACCH一般情況下，在RF信道釋放前都有PhysicalContextReq過程TCH分配過程14整理課件MSBTSBSCMSCSABM(FACCH)ChannelActivationHOCMDAssignmentRequestPhysicalConReqChan.Act.Ack.HODetectionUAPhys.InfoAssignmentCmpST11ST3103QueuingIndicationET11Atthistime,aTCHbecomefreeTCH擁塞和排隊(duì)AssignmentRequestST11QueuingIndicationET11AHandoveralarmisraised.AtargetBTSisselectedHOCMDHOAccessST9103ET9103TTSTTEstablishIndicationTTHOCMPTHOCMPST3124ET3124ET3103直接重試如果QueuingInd=True或Queuing_Anyway=True?！伯?dāng)Queuing_Anyway時(shí)T11_Forced取代T11TCH分配過程——排隊(duì)和直接重試15整理課件TCH擁塞情況不允許排隊(duì)或隊(duì)列已滿在A接口BSC發(fā)AssignmentFailure"NoRadioResourceAvailable"呼叫進(jìn)入隊(duì)列，但T11時(shí)間內(nèi)沒有TCH空出在A接口BSC發(fā)ClearRequest"NoRadioResourceAvailable"呼叫被優(yōu)先級(jí)更高的呼叫擠出隊(duì)列在A接口BSC發(fā)AssignmentFailure"NoRadioResourceAvailable〞T9108超時(shí):BTS對(duì)physicalcontextrequest沒有響應(yīng)之后的ChannelActivation消息中將不帶TA和及BTS的發(fā)射功率信息T9103超時(shí):ChannelActivation沒有回應(yīng)A接口上BSC發(fā)AssignmentFailure"RadioInterfaceFailure"BSC向BTS發(fā)RFChannelRelease消息TCH分配過程——異常情況16整理課件BSC收到ChannelActivationNegativeAcknowledge消息ChannelActivationNegativeAcknowledge有以下幾種原因:ChannelAlreadyActivated(CAA):BSC向和BTS發(fā)信道釋放消息RadioResourceNotAvailable(RRNA)-Protocolerror(PE):BSC內(nèi)部釋放Requestedtranscodingratenotsupported(RTRNS):BSC內(nèi)部釋放Encryptionalgorithmnotimplemented(EANI):BSC內(nèi)部釋放O&MIntervention(OI):BSC內(nèi)部釋放在A接口上發(fā)AssignmentFailure消息對(duì)于收到ChnavNegAck原因?yàn)镋ANI的情況，AssignmentFailure的cause為"CipheringAlgorithmnotsupported"其它情況，AssignmentFailure的cause為"RadioInterfaceFailure"TCH分配過程——異常情況17整理課件在原來的信道上〔如SDCCH信道〕收到AssignmentFailure消息收到AssignmentCommand后，在新信道上發(fā)SABM消息，BTS收到后向發(fā)UA消息。但可能由于空中接口原因，沒有收到UA消息。嘗試N200次均未成功。將會(huì)回到原來的信道。并發(fā)AssignmentFailure消息BSC收到該消息后在A接口發(fā)AssignmentFailure"ReversiontoOldChannel"BSC向BTS發(fā)RFChannelRelease消息，釋放新信道AssignmentCommand的內(nèi)容有誤發(fā)現(xiàn)AssignmentCommand消息中內(nèi)容有誤，發(fā)AssignmentFailure消息到BSCBSC收到該消息后在A接口發(fā)AssignmentFailure"ReversiontoOldChannel"BSC向BTS發(fā)RFChannelRelease消息，釋放新信道T3107超時(shí)BSC在A接口發(fā)AssignmentFailure“RadioInterfaceMessageFailure〞，并開始T9110計(jì)時(shí)BSC向BTS發(fā)RFChannelRelease消息，釋放新老信道MSC向BSC發(fā)ClearCommand消息〔呼叫釋放〕，并停止T9110一般情況下，交換機(jī)收到該消息后發(fā)DISC〔tempfail〕TCH分配過程——異常情況18整理課件直接重試中的異常情況沒有CandidatecellBSC在A接口發(fā)AssignmentFailure“NoRadioResourceAvailable〞ChannelActivation過程中T9103超時(shí)BSC在A接口發(fā)AssignmentFailure“RadioInterfaceFailure〞BSC向BTS發(fā)RFChannelRelease消息BSC收到ChannelActivationNegativeAcknowledge消息ChannelActivationNegativeAcknowledge有以下幾種原因:ChannelAlreadyActivated(CAA):BSC向和BTS發(fā)信道釋放消息RadioResourceNotAvailable(RRNA)-Protocolerror(PE):BSC內(nèi)部釋放Requestedtranscodingratenotsupported(RTRNS):BSC內(nèi)部釋放Encryptionalgorithmnotimplemented(EANI):BSC內(nèi)部釋放O&MIntervention(OI):BSC內(nèi)部釋放在A接口上發(fā)AssignmentFailure消息對(duì)于收到ChnavNegAck原因?yàn)镋ANI的情況，AssignmentFailure的cause為"CipheringAlgorithmnotsupported"其它情況，AssignmentFailure的cause為"RadioInterfaceFailure"TCH分配過程——異常情況19整理課件T3103超時(shí):沒有收到HOFailure或HOComplete消息BSC在A接口發(fā)AssignmentFailure“RadioInterfacemessageFailure〞BSC向和BTS發(fā)信道釋放消息，釋放新老信道收到發(fā)來的HOFailure消息BSC在A接口發(fā)AssignmentFailure“ReversiontoOldChannel〞消息BSC向BTS發(fā)RFChannelRelease消息，釋放新信道Abis上的其它異常中斷消息的處理BSC收到ConnectionFailureIndicaiton消息Cause為:“RadioInterfaceFailure〞:無線鏈路超時(shí)引起的釋放釋放：A接口上，BSC發(fā)ClearRequest“RadioInterfaceFailure〞到交換機(jī)BSC向BTS發(fā)RFChannelRelease消息BSC收到ErrorReport消息BSC收到ErrorIndication消息BSC收到ReleaseIndication消息A中繼信道擁塞或不可用情況TCH分配過程——異常情況20整理課件主叫過程〔非OACSU情況〕MSBTSBSCMSCCallProceedingESTIN(CM_Serv_Req)RRConnectionEstablishmentRRConnectionEstablishmentRRConnectionEstablishmentAuthenticationProcedureAuthenticationProcedureAuthenticationProcedureCipheringProcedureCipheringProcedureCipheringProcedureTMSIReallocProcedureTMSIReallocProcedureTMSIReallocProcedureSETUPSETUPSETUPCallProceedingCallProceedingAssignmentProcedureAssignmentProcedureAssignmentProcedureAlertingAlertingAlertingConnectConnectConnectConnectAck.ConnectAck.ConnectAck.SpeechCM_Serv_ReqOffAirCallSetup〔calledpartynbr〕先建立TCH，再接通B側(cè)信道。Alerting在TCH上發(fā)送〔CMServType，MobileID，Classmark2，Priority，〕SDCCHTCH21整理課件MSBTSBSCMSCCallProceedingESTIN(CM_Serv_Req)RRConnectionEstablishmentRRConnectionEstablishmentRRConnectionEstablishmentAuthenticationProcedureAuthenticationProcedureAuthenticationProcedureCipheringProcedureCipheringProcedureCipheringProcedureTMSIReallocProcedureTMSIReallocProcedureTMSIReallocProcedureSETUPSETUPSETUPCallProceedingCallProceedingAssignmentProcedureAssignmentProcedureAssignmentProcedureAlertingAlertingAlertingConnectConnectConnectConnectAck.ConnectAck.ConnectAck.SpeechCM_Serv_ReqSDCCHTCH先接通B側(cè)信道，再建立TCH。Alerting在SDCCH上發(fā)送主叫過程〔OACSU情況〕22整理課件MSBTSBSCMSCCallConfirmedESTIN(PagingResp)RRConnectionEstablishmentRRConnectionEstablishmentRRConnectionEstablishmentAuthenticationProcedureAuthenticationProcedureAuthenticationProcedureCipheringProcedureCipheringProcedureCipheringProcedureTMSIReallocProcedureTMSIReallocProcedureTMSIReallocProcedureSETUPSETUPSETUPCallConfirmedCallConfirmedAssignmentProcedureAssignmentProcedureAssignmentProcedureAlertingAlertingAlertingConnectConnectConnectConnectAck.ConnectAck.ConnectAck.SpeechPagingResponsePagingPagingCommandPagingRequestST3113ET3113PagingGroup的個(gè)數(shù)〔N〕：由BS_AG_BLKS_RES和BS_PA_MFRMS決定;MS的PagingGroup=(IMSImod1000)modN;MS只監(jiān)聽自己對(duì)應(yīng)的PagingGroup的PagingReq消息〔MSID〔TMSI/IMSI〕，CellID〔LAC/LAC+CI〕〕〔MSID〔TMSI/IMSI〕，PagingGroup〕〔MSID〔TMSI/IMSI〕〕〔最多可同時(shí)發(fā)4個(gè)TMSI〕〔MobileID，Classmark2，Priority，〕〔callingpartynbr〕被叫過程23整理課件Paging失敗T3113超時(shí)如果T3113超時(shí)，PagingResponse消息沒有收到，網(wǎng)絡(luò)會(huì)重發(fā)Paging消息，并重新開始T3113計(jì)時(shí)。重試的次數(shù)在交換機(jī)中定義。24整理課件MSBTSBSCMSCClearCMDESTIN(LocUpReq)RRConnectionEstablishmentRRConnectionEstablishmentRRConnectionEstablishmentAuthenticationProcedureAuthenticationProcedureAuthenticationProcedureCipheringProcedureCipheringProcedureCipheringProcedureTMSIReallocProcedureTMSIReallocProcedureTMSIReallocProcedureLocUpAcceptChannelReleaseDeactivateSACCHDISCReleaseIndicationUARFChReleaseLocUpReqLocUpAcceptLocUpAcceptChannelReleaseRFChReleaseAckClearCMPST3210ET3210〔LUType，MSID，LAI，Classmark1，〕位置更新過程25整理課件切換過程切換分為小區(qū)內(nèi)切換〔IntraCellInternalHandover〕:切換原因(按優(yōu)先級(jí)排序)Cause15&16干擾切換(HighlevelinterferenceonULorDL).Cause10&11:同心圓內(nèi)圓電平過低而向外園切換〔Toolowlevel,innerzone(innertoouterzoneHO,concentriccell)(UL&DL)〕Cause13:同心圓外圓電平較高時(shí)向內(nèi)圓切換〔ToohighlevelontheULandDL,outerzone(outertoinnerzoneHO,concentriccell)〕BSC內(nèi)部小區(qū)間切換〔IntercellInternalHandover〕切換原因(按優(yōu)先級(jí)排序)Cause7:微小區(qū)BadSACCH切換〔SeveralconsecutiveBadSACCHframesreceived(rescuemicrocellHO)〕Cause17&18:微小區(qū)高門限切換〔Toolowlevelinamicrocellcomparedtoahighthreshold(UL&DL)〕Cause2&4:質(zhì)量切換〔TooLowQuality(UL&DL)〕Cause3&5:電平切換〔TooLowLevel(UL&DL)〕Cause6:太長距離且換〔ToolongMS-BSdistance〕Cause22:擴(kuò)站小區(qū)外小區(qū)太短距離切換〔TooshortMS-BSdistance〕Cause20:強(qiáng)制直接重試〔ForcedDirectRetry〕Cause25:GPRS重定向〔GPRSRedirection〕26整理課件Cause21:PreferredBand切換〔Highlevelinneighborcellinthepreferredband〕Cause14:宏小區(qū)到微小區(qū)切換〔HighlevelinaneighbormicrocellformacrocelltomicrocellHO.〕Cause12:PBGT切換〔PowerBudget("BetterCellHO")〕Cause23:話務(wù)切換〔TrafficHO〕Cause24:綜合捕捉切換〔GeneralCaptureHO〕同步切換IntraCell切換局部InternalInterCell切換異步切換切換過程27整理課件MSBTSBSCMSCMeasurementRepMeasurementResIntracell切換PhysContextReqOCOCPhysContextConfOC:OldChannelNC:NewChannelNCNCChannelActivationAckChannelActivationAssignmentCommandAssignmentCommandOCSABMEstablishIndicationUAOCNCNCNCAssignmentCompleteNCAssignmentCompleteHandoverPerformedRFChannelRelOCRFChannelRelAck.OCST9108ET9108ST9103ET9103ST3107ET3107ST_RCR_ACKET_RCR_ACK原信道上的TA、MS/BS_TxPwr被沿用到了新的信道上IntraCellHO總是用Assignment的過程來完成〔HOCause，CellID，ChnType〕IntraCell切換過程28整理課件IntraCell切換過程——異常情況TCH擁塞IntraCell切換將不會(huì)發(fā)生T9108超時(shí):BTS對(duì)physicalcontextrequest沒有響應(yīng)之后的ChannelActivation消息中將不帶TA和及BTS的發(fā)射功率信息T9103超時(shí):ChannelActivation沒有回應(yīng)IntraCell切換過程將終止A接口上不會(huì)有任何消息傳送BSC向BTS發(fā)RFChannelRelease消息，釋放新信道BSC收到ChannelActivationNegativeAcknowledge消息IntraCell切換過程將終止ChannelActivationNegativeAcknowledge有以下幾種原因:ChannelAlreadyActivated(CAA):BSC向和BTS發(fā)信道釋放消息RadioResourceNotAvailable(RRNA)-Protocolerror(PE):BSC內(nèi)部釋放Requestedtranscodingratenotsupported(RTRNS):BSC內(nèi)部釋放Encryptionalgorithmnotimplemented(EANI):BSC內(nèi)部釋放O&MIntervention(OI):BSC內(nèi)部釋放A接口上不會(huì)有任何消息傳送29整理課件IntraCell切換過程——異常情況在原來的信道上〔如SDCCH信道〕收到AssignmentFailure消息IntraCell切換過程將終止A接口上不會(huì)有任何消息傳送BSC向BTS發(fā)RFChannelRelease消息，釋放新信道AssignmentCommand的內(nèi)容有誤，發(fā)AssignmentFailure消息到BSCIntraCell切換過程將終止A接口上不會(huì)有任何消息傳送BSC向BTS發(fā)RFChannelRelease消息，釋放新信道T3107超時(shí)BSC在A接口發(fā)ClearRequest“RadioInterfaceMessageFailure〞BSC向BTS發(fā)RFChannelRelease消息，釋放新老信道形成切換掉話其它異常中斷消息ErrorReportConnectionFailureIndicationReleaseIndicationErrorIndication30整理課件MSBTSservingBSCMSCBTStargetMeasReportMeasResultHOAlarm&CandidateCellPhysContextReqPhysContextConfChannelActivationChannelActAck.HOCommandHOCommandHOAccessHODetectionSABMEstablishIndUAHandoverCompleteHandoverCompleteHandoverPerformedRFChannelReleaseRFChannelRel.Ack.ST9108ET9108ST9103ET9103ST3103ST3103ST3106ET3106ST_RCR_ACKET_RCR_ACKST200ET200原信道上的TA、被沿用到了新的信道上，而MS/BS_TxPwr將用最大功率在新的信道上發(fā)射〔AB，DCH〕〔Cell，MA，MAIO，HSN，TS，TA〕〔TA被采用〕InternalInterCell切換過程——同步切換31整理課件MSBTSservingBSCMSCBTStargetHOAlarm&CandidateCellChannelActivationChannelActAck.HOCommandHOCommandHOAccessHODetectionSABMEstablishIndUAHandoverCompleteHandoverCompleteHandoverPerformedRFChannelReleaseRFChannelRel.Ack.ST9103ET9103ST3103ST3103ST3105ET3105PhysicalInfoST3124ET3124ST200ET200ST_RCR_ACKET_RCR_ACKPhysContextReqPhysContextConfST9108ET9108MeasReportMeasResult沒有PhysicalContReq過程，原信道上的TA不能被沿用到新的信道上測量TA〔TA〕〔TA被采用〕在RF信道釋放前，有PhysicalContextReq過程InternalInterCell切換過程——異步切換32整理課件InternalInterCell切換過程——異常情況TCH擁塞InternalInterCell切換將不會(huì)發(fā)生T9108超時(shí)〔同步切換〕同IntraCell情況T9103超時(shí)同IntraCell情況BSC收到ChannelActivationNegativeAcknowledge消息同IntraCell情況33整理課件InternalInterCell切換過程——異常情況在原來的信道上〔如SDCCH信道〕收到HOFailure消息InternalInterCell切換過程將終止A接口上不會(huì)有任何消息傳送BSC向BTS發(fā)RFChannelRelease消息，釋放新信道HOCommand的內(nèi)容有誤，發(fā)HOFailure消息到BSCInternalInterCell切換過程將終止A接口上不會(huì)有任何消息傳送BSC向BTS發(fā)RFChannelRelease消息，釋放新信道T3103超時(shí)BSC在A接口發(fā)ClearRequest“RadioInterfaceMessageFailure〞BSC向BTS發(fā)RFChannelRelease消息，釋放新老信道形成切換掉話其它異常中斷消息ErrorReportConnectionFailureIndicationReleaseIndicationErrorIndication34整理課件MSBTSservingBSCservingMSCBTStargetMeasReportMeasResultHOAlarm&CandidateCellChannelActivationChannelActAck.HOCommandHOCommandHOAccessHO