Gsm呼叫流程（中文）ppt課件

1、目的和內(nèi)容目的和內(nèi)容t目的t引見GSM正常的呼叫流程空中接口、A-bis接口和A接口t引見部分常見的異常中斷的流程t內(nèi)容tGSM網(wǎng)絡(luò)協(xié)議引見tGSM邏輯信道引見t無線鏈路建立流程Radio and Link Establishment ProceduretTCH正常分配流程N(yùn)ormal Assignment Procedure t主叫流程Originating Callt被叫流程Terminating Callt位置更新流程Location Updatingt切換流程Handover Proceduret呼叫釋放流程Call Release Proceduret信道釋放流程Channel Re

2、lease ProcedureGSMGSM協(xié)議協(xié)議層數(shù)層數(shù)無線網(wǎng)絡(luò)優(yōu)化主要關(guān)懷第三層的無線網(wǎng)絡(luò)優(yōu)化主要關(guān)懷第三層的信令信令無線網(wǎng)絡(luò)優(yōu)化主要關(guān)懷無線網(wǎng)絡(luò)優(yōu)化主要關(guān)懷DTAPDTAP、RSLRSL的信令的信令無線網(wǎng)絡(luò)優(yōu)化主要關(guān)懷無線網(wǎng)絡(luò)優(yōu)化主要關(guān)懷DTAPDTAP、BSSMAPBSSMAP和部分和部分SCCPSCCP的信令的信令DTAPRSLOMLGSM網(wǎng)絡(luò)協(xié)議網(wǎng)絡(luò)協(xié)議tLayer 3引見tRR : 無線資源管理Radio Resource Managementt由MS、BTS和BSC控制t功能舉例tPaging管理Paging Managementt加密管理Ciphered Mode Manag

3、ementt頻點(diǎn)分配Frequency Redefinitiont信道分配Dedicated Channel Assignmentt切換Handover Management t丈量和功率控制Measures and Power ControltMM : 挪動性管理Mobility Managementt由MS和MSC / VLR控制t功能舉例t鑒權(quán)和身份識別Authentication / Identification Procedurest位置更新Location UpdatingtIMSI Attach / DetachGSM網(wǎng)絡(luò)協(xié)議網(wǎng)絡(luò)協(xié)議pCC : 呼叫控制Call Controlp

4、由MS和MSC控制p功能舉例p呼叫處置和路由Call processing and routingp雙音多頻DTMF Facilitiesp短音訊效力Short Message Servicep附加效力Supplementary ServiceGSM網(wǎng)絡(luò)協(xié)議網(wǎng)絡(luò)協(xié)議t呼叫流程中常用的邏輯信道tPCHt尋呼信道Paging ChanneltRACHt隨機(jī)接入信道Random Access ChanneltAGCHt接入認(rèn)可信道Access Grant ChanneltSDCCHt獨(dú)立公用控制信道Stand-alone Dedicated Control ChanneltSACCHt慢聯(lián)絡(luò)控制信道

5、Slow Associated ChanneltTCHt話務(wù)信道Traffic ChanneltFACCHt快聯(lián)絡(luò)控制信道Fast Associated Control ChannelGSM呼叫流程中常用的邏輯信道呼叫流程中常用的邏輯信道PCHRACHAGCHSDCCH + SACCHTCH/FACCH + SACCHt定義t手機(jī)與網(wǎng)絡(luò)間建立一個無線鏈路，用于信令傳送t包括以下四個步驟tPaging過程Paging Procedure僅用于被叫流程中t隨機(jī)接入過程Random Access Proceduret立刻分配過程Immediate Assignment ProceduretSCCP聯(lián)

6、接建立過程SCCP Connection Establishment Procedure 當(dāng)手機(jī)需求與網(wǎng)絡(luò)發(fā)生聯(lián)絡(luò)時，必需求當(dāng)手機(jī)需求與網(wǎng)絡(luò)發(fā)生聯(lián)絡(luò)時，必需求先建立無線鏈路和先建立無線鏈路和A A接口的信令銜接接口的信令銜接無線鏈路建立流程無線鏈路建立流程MSBTSBSCMSCChannel RequestChannel RequiredChannel ActivationSDChannel Act Ack SDImmediate AssignmentCommandUI Imm Assignment / Imm Ass ExtST9103ET9103ST3126ET3126ST3101SABM

7、 L3 InfoEst Ind L3 InfoSCCP Con Rqrd L3SCCP Conn ConfirmET3101ST9105ET9105UA L3 InfoRACHEst Cause，Rnd NbrEst Cause，Rnd Nbr，TARACH_TA_FilteringRACH_TA_FilteringTA，BS/MS_TxPwr -Max，ChannTimerTimer；S - StartS - Start；E - EndE - EndEntityEntity信令音訊信令音訊空中接口空中接口AbisAbis接口接口A A接口接口Rnd Nbr，TDMA Frame Nbr，Ch

8、an ，TAAGCH同時對兩個同時對兩個MSMS分配分配SDCCHSDCCHSDCCHBSCBSC開場對開場對MSMS發(fā)出的上行發(fā)出的上行DTAPDTAP音訊排音訊排隊(duì)如隊(duì)如CM Serv AbortCM Serv Abort音訊。假設(shè)音訊。假設(shè)收到收到MSMS發(fā)出的發(fā)出的Classmark ChangeClassmark Change音音訊，訊，BSCBSC會在會在SCCPSCCP銜接完成后發(fā)銜接完成后發(fā)Classmark UpdateClassmark Update音訊給交換機(jī)音訊給交換機(jī)如如CM Serv ReqCM Serv Req，Pag ResPag Res，Loc Update

9、ReqLoc Update Req等等Set Asynchronous Set Asynchronous Balance ModeBalance Mode。在任。在任何新信道登陸時均會何新信道登陸時均會有有SABMSABM過程過程Unnumbered AckUnnumbered Ack無線鏈路建立流程無線鏈路建立流程無線鏈路建立流程無線鏈路建立流程AbistAbis信令tChannel Required無線鏈路建立流程無線鏈路建立流程AbistChannel Activation無線鏈路建立流程無線鏈路建立流程AbistImmediately Assignment無線鏈路建立流程無線鏈路建立流

10、程異常情況異常情況對不同的呼叫類型有不同的等待時間：對不同的呼叫類型有不同的等待時間：WI_EC/CR/OC/OP.(OPWI_EC/CR/OC/OP.(OP主要指主要指LU,LU,被叫沒有相應(yīng)等待時間被叫沒有相應(yīng)等待時間) )tSDCCH擁塞t假設(shè)BSC在收到Channel Required時，相應(yīng)小區(qū)沒有空閑的SDCCH，BSC將會t假設(shè)小區(qū)參數(shù)En_Imm_Ass_Rej=“True，那么發(fā)Immediately Assignment Rejectt否那么忽略Channel Required音訊tT9103超時tBSC發(fā)RF Channel Release音訊到BTStBSC收到Chan

11、nel Activation NAck音訊tBSC內(nèi)部釋放BTS的相應(yīng)無線信道 (沒有任何音訊在Abis接口上傳送) tT3101超時tLayer 3無法建立 tBSC發(fā)RF Channel Release到BTStT9105超時tBSC經(jīng)過呼叫釋放過程 Call Release Procedure釋放原先建立的SDCCH銜接t在A接口，BSC向MSC發(fā)SCCP釋放懇求 t在RF部分，BSC向手機(jī)和BTS發(fā)信道釋放音訊 僅在僅在BSCBSC內(nèi)部資源表中釋放，在內(nèi)部資源表中釋放，在AbisAbis上沒有信令傳送上沒有信令傳送當(dāng)信道激活不勝利當(dāng)信道激活不勝利時觸發(fā)的時觸發(fā)的BTS RF Chan

12、Rel不包含不包含Phys Cont Req過程過程tBSC收到Establish Indication音訊，但音訊中不含Layer 3 InformationtBSC向手機(jī)和BTS發(fā)信道釋放音訊tAbis上的其它異常中斷音訊的處置tBSC收到Error IndicationtCause為 : t“T200 Expiry : 監(jiān)視SABM和UA過程t“Unsolicited DM Response (發(fā)生在Disconnect過程中t“Sequence Errort釋放：tA接口上，BSC發(fā)Clear Request “Radio Interface Failure到交換機(jī)tBSC向手機(jī)和BT

13、S發(fā)信道釋放音訊tBSC收到Connection Failure indication (Cause : Radio Link Failure)t在A接口上，BSC發(fā)Clear Request “Radio Interface Failure到交換機(jī)tBSC向BTS發(fā)RF Channel Release音訊tBSC收到Release Indicationt當(dāng)收到手機(jī)發(fā)出的DISC音訊tA接口上，BSC發(fā)Clear Request “Radio Interface Failure到交換機(jī)tBSC向手機(jī)和BTS發(fā)信道釋放音訊無線鏈路建立流程無線鏈路建立流程異常情況異常情況MSBTSBSCMSCAu

14、thentication ReqCiphering Mode CmdAuthentication ReqAuthentication ReqAuthentication RespAuthentication RespAuthentication RespEncryption CommandCiphering Mode CmdCiphering Mode CmpCiphering Mode CmpCiphering Mode CmpTMSI Realloc CmdTMSI Realloc CmdTMSI Realloc CmdTMSI Realloc CmpTMSI Realloc CmpTMS

15、I Realloc CmpAuthenticationCipheringTMSI ReallocST3260ET3260*Authentication Reject*IdentificationIdentification RequestST3270ET3270Identification RequestIdentification RequestIdentification ResponseIdentification RespIdentification ResponseST3250ET3250RANDSRESRANDRAND與與KiKi經(jīng)過經(jīng)過A3A3算法算法得到得到SRESSRES；經(jīng)

16、過；經(jīng)過A8A8算算法得到法得到KcKc比較比較SRESSRESIMSI選擇加密算法選擇加密算法Permitted Alg，Kc預(yù)備解密接納預(yù)備解密接納Alg，KcAlgA5算法算法開場加開場加密發(fā)射密發(fā)射和解密和解密接納接納如正確解密接納，那么下如正確解密接納，那么下條音訊加密發(fā)射條音訊加密發(fā)射已加密的音訊已加密的音訊TMSIVLRVLR從從HLRHLR處得處得到到RAND/SRRAND/SRES/KcES/Kc鑒權(quán)、身份識別、加密、鑒權(quán)、身份識別、加密、TMSI重重新分配過程新分配過程鑒權(quán)、身份識別、加密、鑒權(quán)、身份識別、加密、TMSI重重新分配過程新分配過程A口信令口信令tAuthent

17、ication Request鑒權(quán)、身份識別、加密、鑒權(quán)、身份識別、加密、TMSI重重新分配過程新分配過程A口信令口信令tAuthentication Response鑒權(quán)、身份識別、加密、鑒權(quán)、身份識別、加密、TMSI重重新分配過程新分配過程A口信令口信令tIdentification Responset鑒權(quán)過程中的異常情況t鑒權(quán)失敗t假設(shè)鑒權(quán)過程中運(yùn)用TMSI，網(wǎng)絡(luò)將啟動身份識別過程。假設(shè)手機(jī)送上來的IMSI與VLR中TMSI所對應(yīng)的IMSI不一致，那么重新進(jìn)展鑒權(quán)t假設(shè)鑒權(quán)過程中曾經(jīng)運(yùn)用IMSI，那么網(wǎng)絡(luò)發(fā)Authentication Reject音訊。這個SIM將被以為是無權(quán)的tT32

18、60超時t第一次超時，網(wǎng)絡(luò)將重發(fā)鑒權(quán)懇求；第二次超時，網(wǎng)絡(luò)將釋放該MM銜接t身份識別過程中的異常情況tT3270超時t第一次超時，網(wǎng)絡(luò)將重發(fā)身份識別懇求；第二次超時，網(wǎng)絡(luò)將釋放該MM銜接tTMSI重新分配過程中的異常情況tT3250超時t第一次超時，網(wǎng)絡(luò)將重發(fā)TMSI重新分配懇求；第二次超時，網(wǎng)絡(luò)將釋放該MM銜接鑒權(quán)、身份識別、加密、鑒權(quán)、身份識別、加密、TMSI重重新分配過程新分配過程異常情況異常情況t定義t分配TCH的過程t特殊情況t排隊(duì)Queuingt直接重試Directed RetryTCH分配過程分配過程MSBTSBSCMSCChannel Activation TCHSABM (F

19、ACCH)Channel Activation Ack.Assignment CommandAssignment CommandAssignment RequestPhysical Context RequestPhysical Context ConfirmEstablish IndicationUAAssignment CompleteAssignment CompleteAssignment CmpRF Channel Release (SD)RF Channel Release Ack.STrr1ETrr1ST9108ET9108ST9103ET9103ST3107ET3107Chn

20、Type，Priority，CIC，DL DTX，Queuing FlagTA，MS/BS_TxPwrSDCCHTA，MS/BS_TxPwrMA，TS，HSN，MAIO，MS_TxPwr占用占用TCHTCH時，如需傳送信令，那么經(jīng)過時，如需傳送信令，那么經(jīng)過Stealing FlagStealing Flag將將TCHTCH轉(zhuǎn)換成轉(zhuǎn)換成FACCHFACCH普通情況下，在普通情況下，在RFRF信道釋放前都有信道釋放前都有Physical Context ReqPhysical Context Req過程過程TCH分配過程分配過程TCH分配過程分配過程A口口tAssignment RequestE

21、FRQueuingTCH分配過程分配過程AbistAbis信令TCH分配過程分配過程AbistPhysical Context ComfirmTCH分配過程分配過程AbistSystem Information Type 5BA ListTCH分配過程分配過程AbistSystem Information Type 6LAC/CITCH分配過程分配過程AbistAssignment CommandFrequency EncodingBitmap 0TCH分配過程分配過程AbistFrequency Encodingt頻段分配tFrequency Encoding 主要有三種方式tFixed B

22、itmap Bitmap 0 只能表現(xiàn)1124頻點(diǎn)TCH分配過程分配過程AbisRecursive Dichotomy Algorithm 遞歸二分法Variable BitmapMSBTSBSCMSCSABM (FACCH)Channel ActivationHO CMDAssignment RequestPhysical Con ReqChan. Act. Ack.HO DetectionUAPhys. InfoAssignment CmpST11ST3103Queuing IndicationET11At this time, a TCH become freeTCH擁塞和排隊(duì)Assig

23、nment RequestST11Queuing IndicationET11A Handover alarm is raised. A target BTS is selectedHO CMDHO AccessST9103ET9103TTSTTEstablish IndicationTTHO CMPTHO CMPST3124ET3124ET3103直接重試假設(shè)假設(shè)Queuing Ind=TrueQueuing Ind=True或或Queuing_Anyway=TrueQueuing_Anyway=True。當(dāng)。當(dāng)Queuing _AnywayQueuing _Anyway時時T11_Forc

24、edT11_Forced取代取代T11T11TCH分配過程分配過程排隊(duì)和直接重試排隊(duì)和直接重試tTCH擁塞情況t不允許排隊(duì)或隊(duì)列已滿t在A接口BSC發(fā)Assignment Failure No Radio Resource Availablet呼叫進(jìn)入隊(duì)列，但T11時間內(nèi)沒有TCH空出t在A接口BSC發(fā)Clear Request No Radio Resource Availablet呼叫被優(yōu)先級更高的呼叫擠出隊(duì)列t在A接口BSC發(fā)Assignment Failure No Radio Resource AvailabletT9108超時 : BTS對physical context requ

25、est沒有呼應(yīng)t之后的Channel Activation音訊中將不帶TA和手機(jī)及BTS的發(fā)射功率信息tT9103超時 : Channel Activation沒有回應(yīng)tA接口上BSC發(fā)Assignment Failure Radio Interface FailuretBSC向BTS發(fā)RF Channel Release音訊TCH分配過程分配過程異常情況異常情況tBSC收到Channel Activation Negative Acknowledge音訊tChannel Activation Negative Acknowledge有以下幾種緣由 :tChannel Already Acti

26、vated (CAA): BSC向手機(jī)和BTS發(fā)信道釋放音訊tRadio Resource Not Available (RRNA) - Protocol error (PE) : BSC內(nèi)部釋放tRequested transcoding rate not supported (RTRNS) : BSC內(nèi)部釋放tEncryption algorithm not implemented (EANI) : BSC內(nèi)部釋放tO&M Intervention (OI) : BSC內(nèi)部釋放t在A接口上發(fā)Assignment Failure音訊t對于收到Chnav Neg Ack緣由為EANI的情況，A

27、ssignment Failure的cause為Ciphering Algorithm not supportedt其它情況， Assignment Failure的cause為Radio Interface FailureTCH分配過程分配過程異常情況異常情況t在原來的信道上如SDCCH信道收到Assignment Failure音訊 t手機(jī)收到Assignment Command后，在新信道上發(fā)SABM音訊，BTS收到后向手機(jī)發(fā)UA音訊。但能夠由于空中接口緣由，手機(jī)沒有收到UA音訊。手機(jī)嘗試N200次均未勝利。t手機(jī)將會回到原來的信道。t并發(fā)Assignment Failure音訊tBSC

28、收到該音訊后在A接口發(fā)Assignment Failure Reversion to Old ChanneltBSC向BTS發(fā)RF Channel Release音訊，釋放新信道tAssignment Command的內(nèi)容有誤t手機(jī)發(fā)現(xiàn)Assignment Command音訊中內(nèi)容有誤，手機(jī)發(fā)Assignment Failure音訊到BSCtBSC收到該音訊后在A接口發(fā)Assignment Failure Reversion to Old ChanneltBSC向BTS發(fā)RF Channel Release音訊，釋放新信道tT3107超時tBSC在A接口發(fā)Assignment Failure

29、“Radio Interface Message Failure，并開場T9110計(jì)時tBSC向BTS發(fā)RF Channel Release音訊，釋放新老信道tMSC向BSC發(fā)Clear Command音訊呼叫釋放，并停頓T9110普通情況下，交換機(jī)收到該音普通情況下，交換機(jī)收到該音訊后發(fā)訊后發(fā)DISCDISCtemp failtemp failTCH分配過程分配過程異常情況異常情況t直接重試中的異常情況t沒有Candidate celltBSC在A接口發(fā)Assignment Failure “No Radio Resource AvailabletChannel Activation過程中T

30、9103超時 tBSC在A接口發(fā)Assignment Failure “Radio Interface FailuretBSC向BTS發(fā)RF Channel Release音訊tBSC收到Channel Activation Negative Acknowledge音訊tChannel Activation Negative Acknowledge有以下幾種緣由 :tChannel Already Activated (CAA): BSC向手機(jī)和BTS發(fā)信道釋放音訊tRadio Resource Not Available (RRNA) - Protocol error (PE) : BSC內(nèi)

31、部釋放tRequested transcoding rate not supported (RTRNS) : BSC內(nèi)部釋放tEncryption algorithm not implemented (EANI) : BSC內(nèi)部釋放tO&M Intervention (OI) : BSC內(nèi)部釋放t在A接口上發(fā)Assignment Failure音訊t對于收到Chnav Neg Ack緣由為EANI的情況，Assignment Failure的cause為Ciphering Algorithm not supportedt其它情況， Assignment Failure的cause為Radio

32、Interface FailureTCH分配過程分配過程異常情況異常情況pT3103超時 : 沒有收到HO Failure或HO Complete音訊pBSC在A接口發(fā)Assignment Failure “Radio Interface message FailurepBSC向手機(jī)和BTS發(fā)信道釋放音訊，釋放新老信道p收到手機(jī)發(fā)來的HO Failure音訊pBSC在A接口發(fā)Assignment Failure “Reversion to Old Channel音訊pBSC向BTS發(fā)RF Channel Release音訊，釋放新信道pAbis上的其它異常中斷音訊的處置pBSC收到Connec

33、tion Failure Indicaiton音訊pCause為 : p“Radio Interface Failure : 無線鏈路超時引起的釋放p釋放：pA接口上，BSC發(fā)Clear Request “Radio Interface Failure到交換機(jī)pBSC向BTS發(fā)RF Channel Release音訊pBSC收到Error Report音訊pBSC收到Error Indication音訊pBSC收到Release Indication音訊pA中繼信道擁塞或不可用情況TCH分配過程分配過程異常情況異常情況主叫過程非主叫過程非OACSU情況情況MSBTSBSCMSCCall Pro

34、ceedingESTIN (CM_Serv_Req)RR Connection EstablishmentRR Connection EstablishmentRR Connection EstablishmentAuthentication ProcedureAuthentication ProcedureAuthentication ProcedureCiphering ProcedureCiphering ProcedureCiphering ProcedureTMSI Realloc ProcedureTMSI Realloc ProcedureTMSI Realloc Procedu

35、reSETUPSETUPSETUPCall ProceedingCall ProceedingAssignment ProcedureAssignment ProcedureAssignment ProcedureAlertingAlertingAlertingConnectConnectConnectConnect Ack.Connect Ack.Connect Ack.SpeechCM_Serv_ReqOff Air Call SetupOff Air Call Setupcalled party nbr先建立先建立TCHTCH，再，再接通接通B B側(cè)信道。側(cè)信道。AlertingAler

36、ting在在TCHTCH上發(fā)送上發(fā)送CM Serv Type，Mobile ID，Classmark2，Priority，SDCCHTCH主叫過程主叫過程 A口口tA口信令兩次兩次Classmark Update。前一次由于前一次由于Early Classmark Sending引起；引起；后者由于后者由于BSC下發(fā)下發(fā)Classmark Enquiry引起引起主叫過程主叫過程 A口口tCM Service Request主叫：主叫：MOC est/pkt mode con estab短信：短信：Short message service附加效力：附加效力：Suppl service acti

37、vationCLASSMARKtCLASSMARKt包含以下信息tMS Revision Level 手機(jī)的修正版本tMS Ciphering Capability 手機(jī)支持的加密算法tMS Frequency Capability 手機(jī)支持的頻段tMS RF Power Capability in Each Band 手機(jī)在各頻段支持的發(fā)射功率主叫過程主叫過程 A口口tCLASSMARK主叫過程主叫過程 A口口tSetup主叫過程主叫過程 A口口被叫號碼被叫號碼MSBTSBSCMSCCall ProceedingESTIN (CM_Serv_Req)RR Connection Establi

38、shmentRR Connection EstablishmentRR Connection EstablishmentAuthentication ProcedureAuthentication ProcedureAuthentication ProcedureCiphering ProcedureCiphering ProcedureCiphering ProcedureTMSI Realloc ProcedureTMSI Realloc ProcedureTMSI Realloc ProcedureSETUPSETUPSETUPCall ProceedingCall Proceeding

39、Assignment ProcedureAssignment ProcedureAssignment ProcedureAlertingAlertingAlertingConnectConnectConnectConnect Ack.Connect Ack.Connect Ack.SpeechCM_Serv_ReqSDCCHTCH先接通先接通B B側(cè)信道側(cè)信道，再建立，再建立TCH TCH 。AlertingAlerting在在SDCCHSDCCH上發(fā)送上發(fā)送主叫過程主叫過程OACSU情況情況MSBTSBSCMSCCall ConfirmedESTIN (Paging Resp)RR Conn

40、ection EstablishmentRR Connection EstablishmentRR Connection EstablishmentAuthentication ProcedureAuthentication ProcedureAuthentication ProcedureCiphering ProcedureCiphering ProcedureCiphering ProcedureTMSI Realloc ProcedureTMSI Realloc ProcedureTMSI Realloc ProcedureSETUPSETUPSETUPCall ConfirmedCa

41、ll ConfirmedAssignment ProcedureAssignment ProcedureAssignment ProcedureAlertingAlertingAlertingConnectConnectConnectConnect Ack.Connect Ack.Connect Ack.SpeechPaging ResponsePagingPaging CommandPaging RequestST3113ET3113Paging GroupPaging Group的個數(shù)的個數(shù)N N：由：由BS_AG_BLKS_RESBS_AG_BLKS_RES和和BS_PA_MFRMSBS

42、_PA_MFRMS決議決議;MS;MS的的Paging Group = (IMSI mod 1000) mod Paging Group = (IMSI mod 1000) mod N;MSN;MS只監(jiān)聽本人對應(yīng)的只監(jiān)聽本人對應(yīng)的Paging GroupPaging Group的的Paging ReqPaging Req音訊音訊MS IDTMSI/IMSI，Cell IDLAC/LAC+CIMS IDTMSI/IMSI，Paging GroupMS IDTMSI/IMSI最多可同時發(fā)最多可同時發(fā)4個個TMSIMobile ID，Classmark2，Priority，calling party

43、 nbr被叫過程被叫過程tA口信令被叫過程被叫過程 A口口tPaging被叫過程被叫過程 A口口IMSI號碼，號碼，BSC用來計(jì)算用來計(jì)算Paging GroupTMSI號碼，空中接口號碼，空中接口Paging時用，比較經(jīng)濟(jì)時用，比較經(jīng)濟(jì)LAC PagingtA口信令被叫過程被叫過程 A口口tSetup被叫過程被叫過程 A口口主叫號碼主叫號碼tT3113超時t假設(shè)T3113超時，Paging Response音訊沒有收到，網(wǎng)絡(luò)會重發(fā)Paging音訊，并重新開場T3113計(jì)時。重試的次數(shù)在交換機(jī)中定義。Paging失敗失敗MSBTSBSCMSCClear CMDESTIN (Loc Up Req

44、)RR Connection EstablishmentRR Connection EstablishmentRR Connection EstablishmentAuthentication ProcedureAuthentication ProcedureAuthentication ProcedureCiphering ProcedureCiphering ProcedureCiphering ProcedureTMSI Realloc ProcedureTMSI Realloc ProcedureTMSI Realloc ProcedureLoc Up AcceptChannel Re

45、leaseDeactivate SACCHDISCRelease IndicationUARF Ch ReleaseLoc Up ReqLoc Up AcceptLoc Up AcceptChannel ReleaseRF Ch Release AckClear CMPST3210ET3210LU Type，MS ID，LAI，Classmark1，位置更新過程位置更新過程tA口信令位置更新過程位置更新過程 A口口注：在這段信令中，手機(jī)Location Update Request中所帶的TMSI不能被VLR識別普通在跨MSC位置更新時，所以MSC發(fā)Identification Request

46、，要求手機(jī)上發(fā)IMSI號碼。得到IMSI號碼后，MSC到老的VLR中要到鑒權(quán)信息，并對手機(jī)進(jìn)展鑒權(quán)。全部完成后MSC到老的VLR中做Cancel Location，終了一切過程。tLocation Update Request位置更新過程位置更新過程 A口口位置更新后沒有后續(xù)的位置更新后沒有后續(xù)的Follow-on呼叫過程呼叫過程手機(jī)原來的手機(jī)原來的LAC手機(jī)的手機(jī)的TMSItLocation Update Accept位置更新過程位置更新過程 A口口新的新的LAC重新分配的重新分配的TMSIt切換分為t小區(qū)內(nèi)切換IntraCell Internal Handover : t切換緣由 (按優(yōu)先

47、級排序)tCause 15 & 16 干擾切換(High level interference on UL or DL).tCause 10 & 11 : 同心圓內(nèi)圓電平過低而向外園切換Too low level, inner zone (inner to outer zone HO, concentric cell) (UL & DL)tCause 13 : 同心圓外圓電平較高時向內(nèi)圓切換Too high level on the UL and DL, outer zone (outer to inner zone HO, concentric cell)tBSC內(nèi)部小區(qū)間切換Interce

48、ll Internal Handovert切換緣由 (按優(yōu)先級排序)tCause 7 : 微小區(qū)BadSACCH切換Several consecutive Bad SACCH frames received (rescue microcell HO)tCause 17 & 18 : 微小區(qū)高門限切換Too low level in a microcell compared to a high threshold (UL & DL)tCause 2 & 4 : 質(zhì)量切換Too Low Quality (UL & DL)tCause 3 & 5 : 電平切換Too Low Level (UL &

49、DL)tCause 6 : 太長間隔且換Too long MS-BS distancetCause 22: 擴(kuò)站小區(qū)外小區(qū)太短間隔切換Too short MS-BS distancetCause20: 強(qiáng)迫直接重試Forced Direct RetrytCause25: GPRS重定向GPRS Redirection 切換過程切換過程 Cause 21: Preferred Band切換High level in neighbor cell in the preferred band Cause 14: 宏小區(qū)到微小區(qū)切換High level in a neighbor microcell f

50、or macrocell to microcell HO. Cause 12: PBGT切換Power Budget (Better Cell HO) Cause 23: 話務(wù)切換Traffic HO Cause 24: 綜合捕捉切換General Capture HO同步切換 Intra Cell切換部分Internal Inter Cell切換異步切換切換過程切換過程MSBTSBSCMSCMeasurement RepMeasurement ResIntra cell切換Phys Context ReqOCOCPhys Context ConfOC : Old ChannelNC : Ne

51、w ChannelNCNCChannel Activation AckChannel Activation Assignment CommandAssignment CommandOCSABMEstablish IndicationUAOCNCNCNCAssignment CompleteNCAssignment CompleteHandover PerformedRF Channel RelOCRF Channel Rel Ack.OCST9108ET9108ST9103ET9103ST3107ET3107ST_RCR_ACKET_RCR_ACK原信道上的原信道上的TATA、MS/BS_Tx

52、PwrMS/BS_TxPwr被沿用到被沿用到了新的信道上了新的信道上IntraCell HOIntraCell HO總是用總是用AssignmentAssignment的過程來完的過程來完成成HO Cause，Cell ID，Chn TypeIntra Cell切換過程切換過程tAbis信令I(lǐng)ntra Cell切換過程切換過程 AbistAssignment CommandIntra Cell切換過程切換過程 Abis原來的原來的TCH信道信道新分配的新分配的TCH信道信道頻點(diǎn)頻點(diǎn)84tTCH擁塞tIntra Cell切換將不會發(fā)生tT9108超時 : BTS對physical context

53、 request沒有呼應(yīng)t之后的Channel Activation音訊中將不帶TA和手機(jī)及BTS的發(fā)射功率信息tT9103超時 : Channel Activation沒有回應(yīng)tIntra Cell切換過程將終止tA接口上不會有任何音訊傳送tBSC向BTS發(fā)RF Channel Release音訊，釋放新信道tBSC收到Channel Activation Negative Acknowledge音訊tIntra Cell切換過程將終止tChannel Activation Negative Acknowledge有以下幾種緣由 :tChannel Already Activated (CA

54、A): BSC向手機(jī)和BTS發(fā)信道釋放音訊tRadio Resource Not Available (RRNA) - Protocol error (PE) : BSC內(nèi)部釋放tRequested transcoding rate not supported (RTRNS) : BSC內(nèi)部釋放tEncryption algorithm not implemented (EANI) : BSC內(nèi)部釋放tO&M Intervention (OI) : BSC內(nèi)部釋放tA接口上不會有任何音訊傳送Intra Cell切換過程切換過程異常情況異常情況t在原來的信道上如SDCCH信道收到Assignme

55、nt Failure音訊 tIntra Cell切換過程將終止tA接口上不會有任何音訊傳送tBSC向BTS發(fā)RF Channel Release音訊，釋放新信道tAssignment Command的內(nèi)容有誤，手機(jī)發(fā)Assignment Failure音訊到BSCtIntra Cell切換過程將終止tA接口上不會有任何音訊傳送tBSC向BTS發(fā)RF Channel Release音訊，釋放新信道tT3107超時tBSC在A接口發(fā)Clear Request “Radio Interface Message FailuretBSC向BTS發(fā)RF Channel Release音訊，釋放新老信道t構(gòu)

56、成切換掉話t其它異常中斷音訊tError ReporttConnection Failure IndicationtRelease IndicationtError IndicationIntra Cell切換過程切換過程異常情況異常情況MSBTSservingBSCMSCBTStargetMeas ReportMeas ResultHO Alarm & Candidate CellPhys Context ReqPhys Context ConfChannel ActivationChannel Act Ack.HO CommandHO CommandHO AccessHO Detectio

57、nSABMEstablish IndUAHandover CompleteHandover CompleteHandover PerformedRF Channel ReleaseRF Channel Rel. Ack.ST9108ET9108ST9103ET9103ST3103ST3103ST3106ET3106ST_RCR_ACKET_RCR_ACKST200ET200原信道上的原信道上的TATA、被沿用、被沿用到了新的信道上，而到了新的信道上，而MS/BS_TxPwrMS/BS_TxPwr將用最大將用最大功率在新的信道上發(fā)射功率在新的信道上發(fā)射AB，DCHCell，MA，MAIO，HSN

58、，TS，TATA被采用被采用Internal Inter Cell切換過程切換過程同同步切換步切換MSBTSservingBSCMSCBTStargetHO Alarm & Candidate CellChannel ActivationChannel Act Ack.HO CommandHO CommandHO AccessHO DetectionSABMEstablish IndUAHandover CompleteHandover CompleteHandover PerformedRF Channel ReleaseRF Channel Rel. Ack.ST9103ET9103ST3

59、103ST3103ST3105ET3105Physical InfoST3124ET3124ST200ET200ST_RCR_ACKET_RCR_ACKPhys Context ReqPhys Context ConfST9108ET9108Meas ReportMeas Result沒有沒有Physical Cont Physical Cont ReqReq過程，原信道上的過程，原信道上的TATA不能被沿用到新的信不能被沿用到新的信道上道上丈量丈量TATATATA被采用被采用在在RFRF信道釋放前，有信道釋放前，有Physical Physical Context ReqContext Re

60、q過程過程Internal Inter Cell切換過程切換過程異異步切換步切換Internal Inter Cell切換過程切換過程A口口tHO Performed切換緣由切換緣由目的小區(qū)目的小區(qū)tTCH擁塞tInternal Inter Cell切換將不會發(fā)生tT9108超時同步切換t同Intra Cell情況tT9103超時t同Intra Cell情況tBSC收到Channel Activation Negative Acknowledge音訊t同Intra Cell情況Internal Inter Cell切換過程切換過程異異常情況常情況t在原來的信道上如SDCCH信道收到HO Fai