Gsm呼叫流程（中文）ppt课件

1、目的和内容目的和内容t目的t引见GSM正常的呼叫流程空中接口、A-bis接口和A接口t引见部分常见的异常中断的流程t内容tGSM网络协议引见tGSM逻辑信道引见t无线链路建立流程Radio and Link Establishment ProceduretTCH正常分配流程Normal Assignment Procedure t主叫流程Originating Callt被叫流程Terminating Callt位置更新流程Location Updatingt切换流程Handover Proceduret呼叫释放流程Call Release Proceduret信道释放流程Channel Re

2、lease ProcedureGSMGSM协议协议层数层数无线网络优化主要关怀第三层的无线网络优化主要关怀第三层的信令信令无线网络优化主要关怀无线网络优化主要关怀DTAPDTAP、RSLRSL的信令的信令无线网络优化主要关怀无线网络优化主要关怀DTAPDTAP、BSSMAPBSSMAP和部分和部分SCCPSCCP的信令的信令DTAPRSLOMLGSM网络协议网络协议tLayer 3引见tRR : 无线资源管理Radio Resource Managementt由MS、BTS和BSC控制t功能举例tPaging管理Paging Managementt加密管理Ciphered Mode Manag

3、ementt频点分配Frequency Redefinitiont信道分配Dedicated Channel Assignmentt切换Handover Management t丈量和功率控制Measures and Power ControltMM : 挪动性管理Mobility Managementt由MS和MSC / VLR控制t功能举例t鉴权和身份识别Authentication / Identification Procedurest位置更新Location UpdatingtIMSI Attach / DetachGSM网络协议网络协议pCC : 呼叫控制Call Controlp

4、由MS和MSC控制p功能举例p呼叫处置和路由Call processing and routingp双音多频DTMF Facilitiesp短音讯效力Short Message Servicep附加效力Supplementary ServiceGSM网络协议网络协议t呼叫流程中常用的逻辑信道tPCHt寻呼信道Paging ChanneltRACHt随机接入信道Random Access ChanneltAGCHt接入认可信道Access Grant ChanneltSDCCHt独立公用控制信道Stand-alone Dedicated Control ChanneltSACCHt慢联络控制信道

5、Slow Associated ChanneltTCHt话务信道Traffic ChanneltFACCHt快联络控制信道Fast Associated Control ChannelGSM呼叫流程中常用的逻辑信道呼叫流程中常用的逻辑信道PCHRACHAGCHSDCCH + SACCHTCH/FACCH + SACCHt定义t手机与网络间建立一个无线链路，用于信令传送t包括以下四个步骤tPaging过程Paging Procedure仅用于被叫流程中t随机接入过程Random Access Proceduret立刻分配过程Immediate Assignment ProceduretSCCP联

6、接建立过程SCCP Connection Establishment Procedure 当手机需求与网络发生联络时，必需求当手机需求与网络发生联络时，必需求先建立无线链路和先建立无线链路和A A接口的信令衔接接口的信令衔接无线链路建立流程无线链路建立流程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信令音讯信令音讯空中接口空中接口AbisAbis接口接口A A接口接口Rnd Nbr，TDMA Frame Nbr，Ch

8、an ，TAAGCH同时对两个同时对两个MSMS分配分配SDCCHSDCCHSDCCHBSCBSC开场对开场对MSMS发出的上行发出的上行DTAPDTAP音讯排音讯排队如队如CM Serv AbortCM Serv Abort音讯。假设音讯。假设收到收到MSMS发出的发出的Classmark ChangeClassmark Change音音讯，讯，BSCBSC会在会在SCCPSCCP衔接完成后发衔接完成后发Classmark UpdateClassmark Update音讯给交换机音讯给交换机如如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。在任何新信道登陆时均会何新信道登陆时均会有有SABMSABM过程过程Unnumbered AckUnnumbered Ack无线链路建立流程无线链路建立流程无线链路建立流程无线链路建立流程AbistAbis信令tChannel Required无线链路建立流程无线链路建立流程AbistChannel Activation无线链路建立流程无线链路建立流程AbistImmediately Assignment无线链路建立流程无线链路建立流

10、程异常情况异常情况对不同的呼叫类型有不同的等待时间：对不同的呼叫类型有不同的等待时间：WI_EC/CR/OC/OP.(OPWI_EC/CR/OC/OP.(OP主要指主要指LU,LU,被叫没有相应等待时间被叫没有相应等待时间) )tSDCCH拥塞t假设BSC在收到Channel Required时，相应小区没有空闲的SDCCH，BSC将会t假设小区参数En_Imm_Ass_Rej=“True，那么发Immediately Assignment Rejectt否那么忽略Channel Required音讯tT9103超时tBSC发RF Channel Release音讯到BTStBSC收到Chan

11、nel Activation NAck音讯tBSC内部释放BTS的相应无线信道 (没有任何音讯在Abis接口上传送) tT3101超时tLayer 3无法建立 tBSC发RF Channel Release到BTStT9105超时tBSC经过呼叫释放过程 Call Release Procedure释放原先建立的SDCCH衔接t在A接口，BSC向MSC发SCCP释放恳求 t在RF部分，BSC向手机和BTS发信道释放音讯 仅在仅在BSCBSC内部资源表中释放，在内部资源表中释放，在AbisAbis上没有信令传送上没有信令传送当信道激活不胜利当信道激活不胜利时触发的时触发的BTS RF Chan

12、Rel不包含不包含Phys Cont Req过程过程tBSC收到Establish Indication音讯，但音讯中不含Layer 3 InformationtBSC向手机和BTS发信道释放音讯tAbis上的其它异常中断音讯的处置tBSC收到Error IndicationtCause为 : t“T200 Expiry : 监视SABM和UA过程t“Unsolicited DM Response (发生在Disconnect过程中t“Sequence Errort释放：tA接口上，BSC发Clear Request “Radio Interface Failure到交换机tBSC向手机和BT

13、S发信道释放音讯tBSC收到Connection Failure indication (Cause : Radio Link Failure)t在A接口上，BSC发Clear Request “Radio Interface Failure到交换机tBSC向BTS发RF Channel Release音讯tBSC收到Release Indicationt当收到手机发出的DISC音讯tA接口上，BSC发Clear Request “Radio Interface Failure到交换机tBSC向手机和BTS发信道释放音讯无线链路建立流程无线链路建立流程异常情况异常情况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与与KiKi经过经过A3A3算法算法得到得到SRESSRES；经

16、过；经过A8A8算算法得到法得到KcKc比较比较SRESSRESIMSI选择加密算法选择加密算法Permitted Alg，Kc预备解密接纳预备解密接纳Alg，KcAlgA5算法算法开场加开场加密发射密发射和解密和解密接纳接纳如正确解密接纳，那么下如正确解密接纳，那么下条音讯加密发射条音讯加密发射已加密的音讯已加密的音讯TMSIVLRVLR从从HLRHLR处得处得到到RAND/SRRAND/SRES/KcES/Kc鉴权、身份识别、加密、鉴权、身份识别、加密、TMSI重重新分配过程新分配过程鉴权、身份识别、加密、鉴权、身份识别、加密、TMSI重重新分配过程新分配过程A口信令口信令tAuthent

17、ication Request鉴权、身份识别、加密、鉴权、身份识别、加密、TMSI重重新分配过程新分配过程A口信令口信令tAuthentication Response鉴权、身份识别、加密、鉴权、身份识别、加密、TMSI重重新分配过程新分配过程A口信令口信令tIdentification Responset鉴权过程中的异常情况t鉴权失败t假设鉴权过程中运用TMSI，网络将启动身份识别过程。假设手机送上来的IMSI与VLR中TMSI所对应的IMSI不一致，那么重新进展鉴权t假设鉴权过程中曾经运用IMSI，那么网络发Authentication Reject音讯。这个SIM将被以为是无权的tT32

18、60超时t第一次超时，网络将重发鉴权恳求；第二次超时，网络将释放该MM衔接t身份识别过程中的异常情况tT3270超时t第一次超时，网络将重发身份识别恳求；第二次超时，网络将释放该MM衔接tTMSI重新分配过程中的异常情况tT3250超时t第一次超时，网络将重发TMSI重新分配恳求；第二次超时，网络将释放该MM衔接鉴权、身份识别、加密、鉴权、身份识别、加密、TMSI重重新分配过程新分配过程异常情况异常情况t定义t分配TCH的过程t特殊情况t排队Queuingt直接重试Directed RetryTCH分配过程分配过程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时，如需传送信令，那么经过时，如需传送信令，那么经过Stealing FlagStealing Flag将将TCHTCH转换成转换成FACCHFACCH普通情况下，在普通情况下，在RFRF信道释放前都有信道释放前都有Physical Context ReqPhysical Context Req过程过程TCH分配过程分配过程TCH分配过程分配过程A口口tAssignment RequestE

21、FRQueuingTCH分配过程分配过程AbistAbis信令TCH分配过程分配过程AbistPhysical Context ComfirmTCH分配过程分配过程AbistSystem Information Type 5BA ListTCH分配过程分配过程AbistSystem Information Type 6LAC/CITCH分配过程分配过程AbistAssignment CommandFrequency EncodingBitmap 0TCH分配过程分配过程AbistFrequency Encodingt频段分配tFrequency Encoding 主要有三种方式tFixed B

22、itmap Bitmap 0 只能表现1124频点TCH分配过程分配过程AbisRecursive Dichotomy Algorithm 递归二分法Variable BitmapMSBTSBSCMSCSABM (FACCH)Channel ActivationHO CMDAssignment RequestPhysical Con ReqChan. Act. Ack.HO DetectionUAPhys. InfoAssignment CmpST11ST3103Queuing IndicationET11At this time, a TCH become freeTCH拥塞和排队Assig

23、nment RequestST11Queuing IndicationET11A Handover alarm is raised. A target BTS is selectedHO CMDHO AccessST9103ET9103TTSTTEstablish IndicationTTHO CMPTHO CMPST3124ET3124ET3103直接重试假设假设Queuing Ind=TrueQueuing Ind=True或或Queuing_Anyway=TrueQueuing_Anyway=True。当。当Queuing _AnywayQueuing _Anyway时时T11_Forc

24、edT11_Forced取代取代T11T11TCH分配过程分配过程排队和直接重试排队和直接重试tTCH拥塞情况t不允许排队或队列已满t在A接口BSC发Assignment Failure No Radio Resource Availablet呼叫进入队列，但T11时间内没有TCH空出t在A接口BSC发Clear Request No Radio Resource Availablet呼叫被优先级更高的呼叫挤出队列t在A接口BSC发Assignment Failure No Radio Resource AvailabletT9108超时 : BTS对physical context requ

25、est没有呼应t之后的Channel Activation音讯中将不带TA和手机及BTS的发射功率信息tT9103超时 : Channel Activation没有回应tA接口上BSC发Assignment Failure Radio Interface FailuretBSC向BTS发RF Channel Release音讯TCH分配过程分配过程异常情况异常情况tBSC收到Channel Activation Negative Acknowledge音讯tChannel Activation Negative Acknowledge有以下几种缘由 :tChannel Already Acti

26、vated (CAA): BSC向手机和BTS发信道释放音讯tRadio Resource Not Available (RRNA) - Protocol error (PE) : BSC内部释放tRequested transcoding rate not supported (RTRNS) : BSC内部释放tEncryption algorithm not implemented (EANI) : BSC内部释放tO&M Intervention (OI) : BSC内部释放t在A接口上发Assignment Failure音讯t对于收到Chnav Neg Ack缘由为EANI的情况，A

27、ssignment Failure的cause为Ciphering Algorithm not supportedt其它情况， Assignment Failure的cause为Radio Interface FailureTCH分配过程分配过程异常情况异常情况t在原来的信道上如SDCCH信道收到Assignment Failure音讯 t手机收到Assignment Command后，在新信道上发SABM音讯，BTS收到后向手机发UA音讯。但能够由于空中接口缘由，手机没有收到UA音讯。手机尝试N200次均未胜利。t手机将会回到原来的信道。t并发Assignment Failure音讯tBSC

28、收到该音讯后在A接口发Assignment Failure Reversion to Old ChanneltBSC向BTS发RF Channel Release音讯，释放新信道tAssignment Command的内容有误t手机发现Assignment Command音讯中内容有误，手机发Assignment Failure音讯到BSCtBSC收到该音讯后在A接口发Assignment Failure Reversion to Old ChanneltBSC向BTS发RF Channel Release音讯，释放新信道tT3107超时tBSC在A接口发Assignment Failure

29、“Radio Interface Message Failure，并开场T9110计时tBSC向BTS发RF Channel Release音讯，释放新老信道tMSC向BSC发Clear Command音讯呼叫释放，并停顿T9110普通情况下，交换机收到该音普通情况下，交换机收到该音讯后发讯后发DISCDISCtemp failtemp failTCH分配过程分配过程异常情况异常情况t直接重试中的异常情况t没有Candidate celltBSC在A接口发Assignment Failure “No Radio Resource AvailabletChannel Activation过程中T

30、9103超时 tBSC在A接口发Assignment Failure “Radio Interface FailuretBSC向BTS发RF Channel Release音讯tBSC收到Channel Activation Negative Acknowledge音讯tChannel Activation Negative Acknowledge有以下几种缘由 :tChannel Already Activated (CAA): BSC向手机和BTS发信道释放音讯tRadio Resource Not Available (RRNA) - Protocol error (PE) : BSC内

31、部释放tRequested transcoding rate not supported (RTRNS) : BSC内部释放tEncryption algorithm not implemented (EANI) : BSC内部释放tO&M Intervention (OI) : BSC内部释放t在A接口上发Assignment Failure音讯t对于收到Chnav Neg Ack缘由为EANI的情况，Assignment Failure的cause为Ciphering Algorithm not supportedt其它情况， Assignment Failure的cause为Radio

32、Interface FailureTCH分配过程分配过程异常情况异常情况pT3103超时 : 没有收到HO Failure或HO Complete音讯pBSC在A接口发Assignment Failure “Radio Interface message FailurepBSC向手机和BTS发信道释放音讯，释放新老信道p收到手机发来的HO Failure音讯pBSC在A接口发Assignment Failure “Reversion to Old Channel音讯pBSC向BTS发RF Channel Release音讯，释放新信道pAbis上的其它异常中断音讯的处置pBSC收到Connec

33、tion Failure Indicaiton音讯pCause为 : p“Radio Interface Failure : 无线链路超时引起的释放p释放：pA接口上，BSC发Clear Request “Radio Interface Failure到交换机pBSC向BTS发RF Channel Release音讯pBSC收到Error Report音讯pBSC收到Error Indication音讯pBSC收到Release Indication音讯pA中继信道拥塞或不可用情况TCH分配过程分配过程异常情况异常情况主叫过程非主叫过程非OACSU情况情况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侧信道。侧信道。AlertingAler

36、ting在在TCHTCH上发送上发送CM Serv Type，Mobile ID，Classmark2，Priority，SDCCHTCH主叫过程主叫过程 A口口tA口信令两次两次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下发下发Classmark Enquiry引起引起主叫过程主叫过程 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 手机的修正版本tMS Ciphering Capability 手机支持的加密算法tMS Frequency Capability 手机支持的频段tMS RF Power Capability in Each Band 手机在各频段支持的发射功率主叫过程主叫过程 A口口tCLASSMARK主叫过程主叫过程 A口口tSetup主叫过程主叫过程 A口口被叫号码被叫号码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侧信道侧信道，再建立，再建立TCH TCH 。AlertingAlerting在在SDCCHSDCCH上发送上发送主叫过程主叫过程OACSU情况情况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的个数的个数N N：由：由BS_AG_BLKS_RESBS_AG_BLKS_RES和和BS_PA_MFRMSBS

42、_PA_MFRMS决议决议;MS;MS的的Paging Group = (IMSI mod 1000) mod Paging Group = (IMSI mod 1000) mod N;MSN;MS只监听本人对应的只监听本人对应的Paging GroupPaging Group的的Paging ReqPaging Req音讯音讯MS IDTMSI/IMSI，Cell IDLAC/LAC+CIMS IDTMSI/IMSI，Paging GroupMS IDTMSI/IMSI最多可同时发最多可同时发4个个TMSIMobile ID，Classmark2，Priority，calling party

43、 nbr被叫过程被叫过程tA口信令被叫过程被叫过程 A口口tPaging被叫过程被叫过程 A口口IMSI号码，号码，BSC用来计算用来计算Paging GroupTMSI号码，空中接口号码，空中接口Paging时用，比较经济时用，比较经济LAC PagingtA口信令被叫过程被叫过程 A口口tSetup被叫过程被叫过程 A口口主叫号码主叫号码tT3113超时t假设T3113超时，Paging Response音讯没有收到，网络会重发Paging音讯，并重新开场T3113计时。重试的次数在交换机中定义。Paging失败失败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，位置更新过程位置更新过程tA口信令位置更新过程位置更新过程 A口口注：在这段信令中，手机Location Update Request中所带的TMSI不能被VLR识别普通在跨MSC位置更新时，所以MSC发Identification Request

46、，要求手机上发IMSI号码。得到IMSI号码后，MSC到老的VLR中要到鉴权信息，并对手机进展鉴权。全部完成后MSC到老的VLR中做Cancel Location，终了一切过程。tLocation Update Request位置更新过程位置更新过程 A口口位置更新后没有后续的位置更新后没有后续的Follow-on呼叫过程呼叫过程手机原来的手机原来的LAC手机的手机的TMSItLocation Update Accept位置更新过程位置更新过程 A口口新的新的LAC重新分配的重新分配的TMSIt切换分为t小区内切换IntraCell Internal Handover : t切换缘由 (按优先

47、级排序)tCause 15 & 16 干扰切换(High level interference on UL or DL).tCause 10 & 11 : 同心圆内圆电平过低而向外园切换Too low level, inner zone (inner to outer zone HO, concentric cell) (UL & DL)tCause 13 : 同心圆外圆电平较高时向内圆切换Too high level on the UL and DL, outer zone (outer to inner zone HO, concentric cell)tBSC内部小区间切换Interce

48、ll Internal Handovert切换缘由 (按优先级排序)tCause 7 : 微小区BadSACCH切换Several consecutive Bad SACCH frames received (rescue microcell HO)tCause 17 & 18 : 微小区高门限切换Too low level in a microcell compared to a high threshold (UL & DL)tCause 2 & 4 : 质量切换Too Low Quality (UL & DL)tCause 3 & 5 : 电平切换Too Low Level (UL &

49、DL)tCause 6 : 太长间隔且换Too long MS-BS distancetCause 22: 扩站小区外小区太短间隔切换Too short MS-BS distancetCause20: 强迫直接重试Forced Direct RetrytCause25: GPRS重定向GPRS Redirection 切换过程切换过程 Cause 21: Preferred Band切换High level in neighbor cell in the preferred band Cause 14: 宏小区到微小区切换High level in a neighbor microcell f

50、or macrocell to microcell HO. Cause 12: PBGT切换Power Budget (Better Cell HO) Cause 23: 话务切换Traffic HO Cause 24: 综合捕捉切换General Capture HO同步切换 Intra Cell切换部分Internal Inter Cell切换异步切换切换过程切换过程MSBTSBSCMSCMeasurement RepMeasurement ResIntra cell切换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总是用总是用AssignmentAssignment的过程来完的过程来完成成HO Cause，Cell ID，Chn TypeIntra Cell切换过程切换过程tAbis信令Intra Cell切换过程切换过程 AbistAssignment CommandIntra Cell切换过程切换过程 Abis原来的原来的TCH信道信道新分配的新分配的TCH信道信道频点频点84tTCH拥塞tIntra Cell切换将不会发生tT9108超时 : BTS对physical context

53、 request没有呼应t之后的Channel Activation音讯中将不带TA和手机及BTS的发射功率信息tT9103超时 : Channel Activation没有回应tIntra Cell切换过程将终止tA接口上不会有任何音讯传送tBSC向BTS发RF Channel Release音讯，释放新信道tBSC收到Channel Activation Negative Acknowledge音讯tIntra Cell切换过程将终止tChannel Activation Negative Acknowledge有以下几种缘由 :tChannel Already Activated (CA

54、A): BSC向手机和BTS发信道释放音讯tRadio Resource Not Available (RRNA) - Protocol error (PE) : BSC内部释放tRequested transcoding rate not supported (RTRNS) : BSC内部释放tEncryption algorithm not implemented (EANI) : BSC内部释放tO&M Intervention (OI) : BSC内部释放tA接口上不会有任何音讯传送Intra Cell切换过程切换过程异常情况异常情况t在原来的信道上如SDCCH信道收到Assignme

55、nt Failure音讯 tIntra Cell切换过程将终止tA接口上不会有任何音讯传送tBSC向BTS发RF Channel Release音讯，释放新信道tAssignment Command的内容有误，手机发Assignment Failure音讯到BSCtIntra Cell切换过程将终止tA接口上不会有任何音讯传送tBSC向BTS发RF Channel Release音讯，释放新信道tT3107超时tBSC在A接口发Clear Request “Radio Interface Message FailuretBSC向BTS发RF Channel Release音讯，释放新老信道t构

56、成切换掉话t其它异常中断音讯tError ReporttConnection Failure IndicationtRelease IndicationtError IndicationIntra Cell切换过程切换过程异常情况异常情况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将用最大将用最大功率在新的信道上发射功率在新的信道上发射AB，DCHCell，MA，MAIO，HSN

58、，TS，TATA被采用被采用Internal Inter Cell切换过程切换过程同同步切换步切换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没有没有Physical Cont Physical Cont ReqReq过程，原信道上的过程，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信道释放前，有信道释放前，有Physical Physical Context ReqContext Re

60、q过程过程Internal Inter Cell切换过程切换过程异异步切换步切换Internal Inter Cell切换过程切换过程A口口tHO Performed切换缘由切换缘由目的小区目的小区tTCH拥塞tInternal Inter Cell切换将不会发生tT9108超时同步切换t同Intra Cell情况tT9103超时t同Intra Cell情况tBSC收到Channel Activation Negative Acknowledge音讯t同Intra Cell情况Internal Inter Cell切换过程切换过程异异常情况常情况t在原来的信道上如SDCCH信道收到HO Fai