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1、GPRS信令流程潘沖2003-2-21GPRS系統(tǒng)結(jié)構(gòu)傳輸平面GSMRFMACRLCLLCSNDCPIP/X.25ApplicationGSMRFMACRLCL1bisNetworkServiceBSSGPRelayL1bisNetworkServiceBSSGPL1L2IPL1L2IPUDP/TCPGTPIP/X.25LLCSNDCPUDP/TCPGTPRelayMSBSS/PCUSGSNGGSNUmGbGnGi信令平面MS-SGSNSGSN-HLR/EIR/SMSSGSN-MSC/VLRGSN-GS
2、NGPRS信道52復(fù)幀結(jié)構(gòu)52TDMAFramesB0B1B2TB3B4B5IB6B7B8TB9B10B11ITDMAframeRLCBlockB0-B11為RLCBlock,包括PBCCH,PCCCH(PAGCH,PPCH,andPRACH),PACCH,PDTCH,T代表PTCCH,每個52-Multifrme中有兩個PTCCHFrame.I代表IdleFrame1個52-Multifrme可被看成2個26-Multiframe.分組邏輯信道GroupNameDirectionFunctionPBCCH
3、PBCCHDLBroadcastPDTCHUL&DLDataPACCHUL&DLAssociatedcontrolPTCHPRACHULRandomaccessPPCHDLPagingPAGCHDLAccessgrantPNCHDLMulticastPCCCHGPRS移動性管理(GMM)GMM中MS的狀態(tài)IDLE:用戶沒有附著(Attach)在GPRS網(wǎng)絡(luò)上,MS和SGSN上下文(Context)中沒有該用戶的路由信息,也不會進(jìn)行相關(guān)的GPRS移動性管理過程。在該狀態(tài)下MS無法進(jìn)行數(shù)據(jù)傳輸,也不能接收GPR
4、S尋呼消息。STANDBY:用戶已附著在GPRS網(wǎng)絡(luò)上,MS和SGSN上已經(jīng)建立對于該用戶IMSI的移動管理上下文,MS可以接收來自網(wǎng)絡(luò)方的GPRS尋呼消息,但不能傳輸數(shù)據(jù)。READY:該狀態(tài)下與STANDBY狀態(tài)相比,在SGSN移動管理上下文中用戶的信息已定位在cell級,MS會將所選cell報告給SGSN。在該狀態(tài)下,MS可以進(jìn)行數(shù)據(jù)傳送。GPRS移動性管理Idle/Standby/Ready狀態(tài)轉(zhuǎn)換Attach信令流程7d.CancelLocationAck7c.CancelLocation7b.Up
5、dateLocation7g.UpdateLocationAck7e.InsertSubscriberData7f.InsertSubscriberDataAck6d.InsertSubscriberData6c.CancelLocationAck6b.CancelLocation3.IdentityResponse2.IdentificationResponse2.IdentificationRequest1.AttachRequest5.IMEICheck3.IdentityRequest4.Authe
6、ntication6a.UpdateLocation7a.LocationUpdatingRequest7h.LocationUpdatingAccept6f.UpdateLocationAck6e.InsertSubscriberDataAckMSBSSnewSGSNoldSGSNGGSNHLREIRoldMSC/VLRnewMSC/VLR9.AttachComplete8.AttachAccept10.TMSIReallocationCompleteDetach信令流程3.IMSIDetachIndic
7、ation2.DeletePDPContextResponse1.DetachRequest2.DeletePDPContextRequest5.DetachAcceptMSBSSGGSNSGSNMSC/VLR4.GPRSDetachIndication2.DeletePDPContextResponse1.DetachRequest2.DeletePDPContextRequest4.DetachAcceptMSBSSGGSNSGSNMSC/VLR3.GPRSDetachIndicationHLRMSBS
8、SGGSNSGSNMSC/VLR3.DeletePDPContextRequest1.CancelLocation4.GPRSDetachIndication2.DetachRequest6.CancelLocationAck3.DeletePDPContextResponse5.DetachRequest手機(jī)發(fā)起SGSN發(fā)起HLR發(fā)起GPRS移動性管理路由區(qū)更新(RAU)LA≥RA≥CELLRAI=MCC+M