课件说明教案

移动通信 LTE/GSMCSFB技术研广2013-03-fid 移动通信 内CSFBCSFBfid 移动通信

FastReturnorFastRe-fid 移动通 CSFB性能比移动通信 内CSFBEPC/LTE简CSFBfid 移动通信 缩略CSFB：CircuitSwitchFall-BackforVoice,即:LTE语音业fid 移动通信 LTE+fid 移动通信 LTE系统节fid S1-E-Operator'sIP(e.g.IMS,PSSIP连fid

CSFB系统构EPSarchitectureforCSfallbackoverAfid

fid

fid 移动通 PDNDataData

SRBSRBSRB

CCCH:RRCconnectionDCCH:L1/L2andmeasurementconfigurationPaggybackNAS

fid 移动通信 LTEUE移动性管理和主要状态EMMAlways

RRC––––GPRSPDPcontextfid www：LTE–trackingTAI=PLMNid+GSM–LocationLAI=PLMNGPRS–RoutingRAI=PLMNfid 移动通信 UE2/3G2/3Gfid

LTE基本消息和信RRC-RadioResource系统消无线资源连接建立、释无线层L1/L2的配无线测量管NAS–NonAccessStratum移动管理会话管理fid 移动通信 系统广播消SIB1,小区识别信SIB2,本小区接入信SIB3,小区重选设SIB4,同频4G邻区信SIB5,异频4G邻区信SIB6,TDS邻区信SIB7,GSM邻区信。。

SIB1本小区频点SIB3,小区识别信息LAC/CI,区选择控制，接入信息fid 移动通信 GSMSIB1：本小区频format_id=2format_id_2=1format_id_3=3 =621 7=42(02a)' )•15=33(0x21)•23=0(0x0)•31=0(0x0)•39=0(0x0)•47=0(0x0)•55=0(0x0)•63=0(0x0)•71=0(0x0)•79=0(0x0)•87=0(0x0)•95=0(0x0)•03=0(0x0) max_retrans=2tx_int=14cell_barr_access=0re=1ac=0padding_bits_L=0Bandspare_padding0=0fid 移动通信 GSMSIB3：LAC/ID,接入信chan_type=1l2_pseudo_len=18msg_type=27cell_ident_val=19617mcc_1=4mcc_2=6mcc_3=0mnc_3=15mnc_1=0mnc_2=0loc_area_code=22457mscr=1att=1bs_ag_blks_res=2ccch_conf=2cbq3=0bs_pa_mfrms=0t_3212_timeout=20pwrc=1dtx=1radio_link_timeout=7cell_reselect_hys=5acs=0neci=1rxlev_access_min=10max_retrans=2tx_int=12cell_barr_access=0re=1ac=0OptionalSelection

fid 移动通信 GSMSIB2Quater：3/4G邻……SI2quater_INDEX=3SI2quater_COUNT=3……const_1=1const_1=1 =38000const_1=1 =38950const_0=0const_0=0const_0=0const_0=0_3g_csg_description_present=0padding_bits_L=0spare_padding0=

fid 移动通信 RRC：配置UE-eNB接入协fid

RRC建

SRBTM,SRconfig,SRB

e.g.NAS:AttachorMO

SRBRRCSecurityModeRRCSecurityModeCommand SRBfid

连接建立RespondtoaCSpageCSFBPSDLNetworkinitiatedNASUEinitiatedNASESR:CSFB

SRB2:DRB: fid 移动通信 RRC：承载控制信UE->eNB:RRCconnection由业务触发，例如ESR或RRCconnection配置SRB1,MAC和物理RRCconnectionPiggybackNAS：Attach，MOCSFB配置SRB2和SRB2用来直传NAS消息DL/ULInformationfid whr _fid wr

___ fid

NAS消移动性管IdentitySecurity移动连接管ServiceNAStransport会话管PDNEPSbearer

移动性管IdentitySecurityCallGMMGMMPS会话管PDPPDPcontextfid ES.rtcec Attach Attach Authentication Authentication Authentication Authentication Identity Identity Securitymode Securitymode

Trackingareaupdateaccept Trackingareaupdatecomplete Trackingareaupdatereject Trackingareaupdate Service Service Extendedservice Detach Detach CSservice Securitymodereject SecurityprotectedNAS DownlinkNAS UplinkNAS

EMMEMMGUTIreallocationGUTIreallocationfid (Spec ActivatededicatedEPSbearercontextaccept ActivatededicatedEPSbearercontextreject ActivatededicatedEPSbearercontextrequest ActivatedefaultEPSbearercontextaccept ActivatedefaultEPSbearercontextreject ActivatedefaultEPSbearercontextrequest ModifyEPSbearercontextaccept ModifyEPSbearercontextreject ModifyEPSbearercontextrequest Bearerresourceallocationreject Bearerresourceallocationrequest Bearerresourcemodificationreject Bearerresource ESM fid 移动通信 内CSFBCSFB关键信令/CSFBfid 移动通信 CSFB信令流程-CSFB主叫流回归fid 联fid 移动通信 CSFB–CombinedMMEtofigureoutaVLRforCSservice,theMSC/VLRcreateSGinterfaceto1.1.Attach2.Step3tostep16oftheAttachprocedurespecifiedinTSDeriveVLRLocationUpdateCreateSGs6.6.Locationupdatein8.Step8.Step17tostep26oftheAttachprocedurespecifiedinTSfid Attach

Serving

PDN

4.IdentityIdentity

3.Identification5a.Authentication/5b.Identity6.CipheredOptions6.CipheredOptions

5b.MEIdentity7.DeleteSesion7.DeleteSession

7.PCEFInitiatedIP-CANSessionTerminationUpdateLocation9.CancelLocation

10.DeleteSession10.DeleteSession

PCEFInitiatedIP-CANSessionTerminationUpdateLocationCreateSessionCreateSessionPCEFInitiatedIP-CANCreateSessionInitialContextSetupRequest/AttachRRCConnectionRRCConnectionReconfigurationInitialContextSetupDirect

CreateSessionFirstDownlinkData(ifnot

FirstUplink

mPrivilege 23ModifyBearer移动通信 联Attach voice__pref_for_EUTRAN=2(0x2)(CSVoicepreferred,IMSPSVoiceassecondary)UE_usage_setting=0(0x0)(Voicefid 移动通信 联 被接Attachattach_result=2(0x2)(combEPS/IMSIqci=8(0x8)fid 移动通 CSFB–MOcallflow,connected

1a.NASExtendedService1a.NASExtendedService

equestwithCSFallback1c.S1-APUEContextModificationResponse3a. .3b,3cRRCconnection4S1-AP:S1UEContextReleaseMME4S1-AP:S1UEContextReleaseS1UEContextUEchangesRATthenLAUpdateorRAUpdateorLAUandRAU7a.Suspend(see23.060)9.CMService

9.A/Iu-csmessage(withCMService10a.Serviceis10c.CSis10c.CSMOUEaccess2G/3GforCS

Ifthefid 移动通

连接可以省 RRCreleasewith{{rrc-TransactionIdentifier{releaseCauseredirectedCarrierInfogeran{s s{}}}}}fid 移动通 R9RRCreleasewithSIvalueDL-DCCH-Message{messagec1:rrcConnectionRelease{{releaseCause{s s{}{{{{physCellId-{networkColourCodecarrierFreq-{systemInformation-{ }{physCellId-{

fid (idle)R8redirection+fid 移动通信 CSFB信令流程-CSFB被叫流TAU区更fid 移动通 CSFBMTcallflow-connected

1A.CSSERVICE

1A.PAGINGPagingrequestfromMSCvia

1A.SERVICE1A.SERVICE1b.NASExtendedService 1c.CSPaging2.OptionalMeasurement3a. 3b,3c.Signallingconnection4.S1-AP:3a. 3b,3c.Signallingconnection4.S1-AP:S1UECONTEXTRELEASERE

5.S1UECONTEXT6.UEchangesRATthen,LAUORRAUPDATEORLAUAND7a.Suspend(seeTS9.PagingUEaccess2G/3GforCS

7b.SuspendRequest/Update9a.EstablishCS9b.Signalling9b.SignallingConnection 9b.CONNECTION9c.LocationAreaUpdateorCombinedRA/LAfid

移动通信 FastReturn–RRchannelInformationType/RRProtocolProtocolMVSkipMVChannelMessageMessageMV1RRRRCauseMV1BAO6-GroupChannelGroupChannelO(note5-GroupCipherKeyGroupCipherKeyNumberC1GPRSGPRSResumptionO1BAListBAListO3-UTRANFreqUTRANFreqListO3-CellChannelCellChannelDescriptionOCellselectionindicatorreleaseofallTCHandCellselectionindicatorreleaseofallTCHandSDCCHO4-EnhancedDTMCSEnhancedDTMCSO1VGCSCipheringVGCSCipheringO3-GroupChannelDescriptionGroupChannelDescription2O(noteTalkerTalkerIdentityO3-TalkerPriorityTalkerPriority 才 3tVGCSAMRVGCSAMRO3移动通信 2012Dec1505:25:42.173[00]0x512FGSMRRSignalingMessage-Channel……cell_select_ind_incl=1(0x1)length_of_cell_selection_indicator=3const_011=3(0x3)struct3_count=1(0x1)const_1=1E-UTRAN=39250not_allowed_cells_present=0(0x0)target_pcid_present=0(0x0) fid 移动通信 CSFB–MTcallflow-idlefid A

Triggertostart

24.301,

TrackingAreaUpdateTrackingAreaUpdateSGSNContextSecuritySGSNContextAcknowledgeCreateSession

ifyBearer

14.UpdateLocation17.Cancel

FIniiatedIP-CANSessionModficationifyBearerCancelLocation18.IuRelease19.IuRelease

20.CancelLocationTrackingAreaUpdate

21.UpdateLocationTrackingAreaUpdateProcedureasinTS23.401,tepsto7fFigure5.4移动通信 Figure-1:HSSInitiatedSubscribedQoS1.1.InsertSubscriber1a.InsertSubscriberdata2b.ModifyBearer4.PCEFInitiatedIP-Sessionr8.Provision7.Update6.ProcedureasinTS23.401,steps3to10Figure-1orsteps3to8ofFigure5.4.3-5.Update3.Modify.2a.UECtxtPDNfid 移动通信 1.IP-CANSessionUpdateBearerUpdateBearerDownlinkNASDirectDirectUplinkNASUpdateBearern10.IP-CAN9.UpdateBearerPDNServingfid 移动通信 1.IP-CANUpdateBearerUpdateBearerBearerModifyRequest/SessionManagementRequestRRCConnectionRRCConnectionReconfigurationBearerModifyDirectSessionManagementUpdateBearer12.IP-CAN11.UpdateBearerPDNServingfid 移动通 (idle)MTR8redirection+fid 移动通信 fid 移动通信 R8

R8fid 移动通信 MO和MT的CSFB比UE发起ESRCSFBServiceRequest

CSUE响应ESRCSFBfid 移动通信 同LA和跨LA的比同ServiceRequest或

跨UE在GSM发起CMServiceRequest或Pagingresponsefid 移动小区重选和快速重定向的比

通过RRChannelRelease直快速回到需要有能力识别适用fid 移动通信 连接态CSFB的特MT连接态时，用CSServiceNotification而不是PCCH:CSpaging。fid 移动通信 内CSFBCSFBfid 移动通信

fid 移动通信 CSFB过程空口关键步被叫流程paging->ESR(CSFB为了承载NAS信令ESR（CSFBindication/CSterminating读必要的系统消息（例如SIB2包括小区接入信息）并接入小CMServiceRequest/PagingResponse->NAS>Alerting->…->Disconnect->NASrelease->RRfid 移动通信 通话结束，回归重选回LTE读LTESIBTAU->TAU快速定向到fid 移动通信 L2LCSFB端到端流程分fid 移动通信 ExemplaryCSFBCallDeltaDeltainpagingdelayforMTRRCconnectionforsendingNASTuneawaytoGSMSIBAdditionalprocessthannormalGSMNoUEprocessingPCCH:pagingNoUEprocessingPCCH:pagingwithCSDoman TuneawaytoFIRSTSYSTEMINFORMATIONNASNASNASNASNASNASNASNASNASNASNASNASNASNASNAS 网 移动通信 CSMT起始点：NASCSServiceMTfid 移动通信 LTE回归时LTE回归时fid

重选回归不可及时重选LTE回归过程中电路域不可及过程mPrivilegeandConfntial才网 移动通信 重定向回归不可及时重定向回归不可及时联合或联合EPC或LAUfid 移动通信 内CSFBCSFBCSFB性能优fid 移动通信 网络侧性能优化方MSCPTM-fid C

fid 信 No

MSC

LAC- fid GMSC对于失败的寻呼从新发起HLR问时延很LocationCancelation，并使原MSC时延可接fid

SRI

Old

New SRI

PRNACK

LocationIAM Send(MTRFSupported,newMSC/VLRnumbersNonPre-

AuthenticationUpdateLocation(MTRFCancelLocation(MTRFSupportedAndAuthorized,NewMSC/VLRnumbers)CancelLocationAckOldMSCstopspagingtimerInsertSubscrberData(multiple)IfHLRauthorisesMTRFthenusenewMSC/VLRnumberstotriggersendingofPRNReqPRN(MTRFIndicator,OldMSCnumber)InsertSubscriberData(continued)UpdateLocationAfterUpdateLocationAckisreceived,thenewVLRreturnsMSRN’totheoldVLR.PRNACKIAM

Furtherproceduresrelatedtolocationupdate.E.g.ciphering,IMEIchecking,TMSINewVMSC/VLRdelayssetupuntillocationupdateprocedurefinishes.LocationUpdateAcceptTMSIReallocCmplt

Normal

SRI

LR

MS/LLR

MS/LLRMMUpdateLocation(MTRFCancelLocation(MTRFSupportedAndAuthorized,newMSC/VLRnumbers)CancelLo