GPRS上网流程概述课件

1、GPRSGPRS上网流程概述上网流程概述第一部分 PS域核心网架构第二部分 GPRS上网原理概述第三部分 测试实例目录2PS域核心网架构无线侧无线侧23SCCPSCCPGrSGSNHLRTCAPMAPTCAPMAPSignallingBearerSignallingBearer控制面协议栈 UDP L2 L1 IP L2 L1 IP UDP Gn SGSN GTP-C GTP-C GGSN BSSGPRelayGMM/SMLLCRLCMACGSM RFGMM/SMLLCBSSGPL1bisUmGbMSBSSSGSNNetworkServiceRLCMACGSM RFL1bisNetworkSe

2、rvice RLC RRC L1 G MM / SM / SMS RRC MAC L1 RANAP L2 Relay L1 L2 SGSN RNS MS Iu-Ps Uu RLC SCCP Signalling Bearer MAC L1 Sig nalling Bearer RANAP SCCP G MM / SM / SMS 4用户面协议栈 L1 RLC PDCP MAC E.g. , IP , PPP Application L1 RLC PDCP MAC L1 UDP/IP GTP - U L2 Relay L1 UDP/IP L2 GTP - U E .g. , IP , PPP 3

3、G - SGSN UTRAN MS Iu-PS Uu Gn Gi 3G - GGSN L1 UDP/IP GTP -U L2 L1 UDP/IP GTP - U L2 Relay 5手机如何上网？第一部分 PS域核心网架构第二部分 GPRS上网原理概述第三部分 测试实例目录7上网第一步：GPRS附着MM上下文存储在存储在MS和和SGSN中中, HLR中也有部分内容中也有部分内容包括用户状态、位置数据、终端能力等包括用户状态、位置数据、终端能力等是移动性管理的基础是移动性管理的基础一个用户对应一个一个用户对应一个MM上下文上下文一个一个MM上下文可对应多个上下文可对应多个PDP上下文上下文9以保

4、存在SGSN中的MM上下文为例，MS中保存的MM上下文略有不同。MM上下文内容10A/Gb Mode MM StateIDLEGPRS AttachPDU TransmissionREADY Timer ExpiredOrForce to STANDBYREADYSTANDBYGPRS DETACHMS MM StatesSGSN MM StatesIDLEGPRS AttachPDU TransmissionREADYSTANDBY CancellocationOrImplicit DetachREADY Timer ExpiredOrForce to STANDBYOrAbnormal R

5、LC ConditionGPRS DETACHOrCancel locationIdle状态：用户未附着。MS 和SGSN无有效的位置信息和路由信息。此时无法PS寻呼到用户。Standby状态：用户已附着。SGSN中对MS的位置信息精确到路由区。SGSN若有下行信令或数据，需要下发寻呼。Ready状态：用户已附着。 SGSN中对MS的位置信息精确到小区。SGSN向MS直接发送下行信令或数据，不需要寻呼。11Iu Mode MM StatePS AttachPS SignallingConnection ReleasePS SignallingConnection EstablishPS Det

6、achDetach,PS Attach Reject,RAU RejectSGSN MM StatesPMM-IDLESM-ACTIVE orINACTIVEPMM-CONNECTEDPMM-DETACHEDServing RNCrelocationPS AttachPS SignallingConnection ReleasePS SignallingConnection EstablishPS DetachDetach,PS Attach Reject,RAU RejectMS MM StatesPMM-IDLEPMM-CONNECTEDPMM-DETACHEDPMM-DETACHED状态

7、：MS 和SGSN无有效的位置信息和路由信息。此时无法PS寻呼不到用户。 SGSN的MM上下文中无有效的信息PMM-IDLE状态：SGSN上MS的位置信息精确到路由区，若要下发数据或信息，需要先进行寻呼。 SGSN与MS间不存在信令连接.PMM-CONNECTED状态：SGSN上MS的位置信息精确到Serving RNC。 SGSN与MS存在信令连接.为什么在PS域定义多种业务状态？连接建立连接释放p CS域的业务特点：时间小时秒p PS域的业务特点：突发性MSNew SGSNAttach RequestAttach AcceptOld SGSNIdentification RequestId

8、entification ResponseIdentity ResponseIdentity RequestGGSNHLRAuthentication Delete PDP Context RequestDelete PDP Context ResponseUpdate GPRS LocationUpdate GPRS Location ACKCancel LocationInsert Subscriber DataCancel Location ACKInsert Subscriber Data ACKAttach CompleteGPRS附着流程Delete PDP Context Req

9、uestDelete PDP Context ResponseGPRS附着流程MSNew SGSNAttach RequestAttach AcceptHLRAuthentication Update GPRS LocationUpdate GPRS Location ACKInsert Subscriber DataInsert Subscriber Data ACKAttach Complete场景：用户首次附着，使用IMSI发起附着。Attach TypeIMSIOld RAIGPRS CKSNMS network capabilityMS Radio Access capabiltyD

10、RX parameterRequested READY timerIMSISGSN addressSGSN numberGPRS enhancements support indicatorIMSIMSISDNODB Regional Subscription DataNAMGPRS Subscription DataSubscribed Charging CharacteristicsAccess Restriction DataAttach resultRAIForce to standbyPeriodic RA update timerRadio priority for SMSRadi

11、o priority for TOM8P-TMSI signatureAllocated P-TMSINegotiated READY timerCell NotificationGPRS附着流程MSNew SGSNAttach RequestAttach AcceptHLRAuthentication Attach Complete场景二：用户在本SGSN上附着过，其SGSN上已经建立的MM上下文还存在。Attach TypeP-TMSIP-TMSI signatureOld RAIGPRS CKSNMS network capabilityMS Radio Access capabilty

12、DRX parameterRequested READY timerGPRS附着流程MSNew SGSNAttach RequestAttach AcceptIdentity RequestIdentity ResponseGGSNHLRAuthentication Update GPRS LocationUpdate GPRS Location ACKInsert Subscriber DataInsert Subscriber Data ACKAttach Complete场景三：用户在本SGSN上附着过，但SGSN上的MM上下文已不存在。Attach TypeP-TMSIP-TMSI s

13、ignatureOld RAIGPRS CKSNMS network capabilityMS Radio Access capabiltyDRX parameterRequested READY timerIdentity typeForce to standyMobile identityDelete PDP Context RequestGPRS附着流程MSNew SGSNAttach RequestAttach AcceptOld SGSNIdentification RequestIdentification ResponseIdentity RequestIdentity Resp

14、onseGGSNHLRAuthentication Delete PDP Context RequestDelete PDP Context ResponseUpdate GPRS LocationUpdate GPRS Location ACKCancel LocationInsert Subscriber DataDelete PDP Context ResponseCancel Location ACKInsert Subscriber Data ACKAttach Complete场景三：用户在其他SGSN上附着过上网第二步： MS发起的PDP激活过程191919会话管理的核心PDP上

15、下文PDP：Packet Data Protocol 分组数据协议PDP上下文：一组与PDP相关的信息PDP上下文的定义21以保存在SGSNSGSN中的PDP上下文为例：PDP上下文的内容22INACTIVEACTIVEDeactivate PDP ContextMM State change to IDLE(Gb mode) or PMM-DETACHED(Iu mode)Activate PDP ContextPDP上下文的状态MSSGSNGGSNActivate PDP Context RequestDNSCreate PDP Context RequestStandard QueryS

16、tandard Query AckCreate PDP Context ResponseOCSCCR(I)CCA(I)RNCRAB Assignment ReqeuastRAB Assignment ResponseActivate PDP Context AcceptMS发起的PDP上下文激活流程MSSGSNGGSNActivate PDP Context RequestDNSCreate PDP Context RequestCreate PDP Context ResponseOCSBSCActivate PDP Context AcceptMS发起的PDP上下文激活（Gb模式）场景一：

17、MS从2G发起PDP激活GTP headerIMSIMSISDNEnd User AddressAccess Point NameNSAPISGSN Address for signalingSGSN Address for user trafficTEID Data ITEID Control PlaneCharging CharacteristicsQoS profileTFTRAT TypeUser Location InformationIMEI(SV）Negotiated LLC SAPINegotiated QoSRadio priorityPDP AddressProtocol

18、configuration optionsRequested NSAPIRequested LLC SAPIRequested QoSRequested PDP AddressAccess Point NameGTP headerCauseTEID Data ITEID Control PlaneCharging IDEnd User AddressGGSN Address for Control PlaneGGSN Address for user trafficMSSGSNGGSNActivate PDP Context RequestDNSCreate PDP Context Reque

19、stCreate PDP Context ResponseOCSRNCRAB Assignment ReqeuastRAB Assignment ResponseActivate PDP Context AcceptMS发起的PDP上下文激活（Iu模式）场景二：MS从3G发起PDP激活26PDP上下文其他场景27APN-Access Point NameAPN：GPRS网络到其他计算机的网关名网络标示 运营商标示构成： 示例： uninet. mnc001.mcc460. gprs3gnet /3gwap /uninet /uniwap用户向网络侧提供APN用于SGSN选择接入哪个GGSN用于

20、GGSN选择接入哪个外部网络28APN扩展功能网络标示 运营商标示构成： 示例： MSISDN: 8618601102531 uninet. 1860110. mnc001.mcc460. gprsAPN扩展：network id.*.mnc.mcc.gprsSGSN可以对特定的用户上报的APN进行特定扩展处理：第一部分 PS域核心网架构第二部分 GPRS上网原理概述第三部分 测试实例目录30Attach Request(使用IMSI)Attach TypeIMSIOld RAIGPRS CKSNMS network capabilityMS Radio Access capabiltyDRX

21、 parameterRequested READY timer31Update GPRS InformationIMSISGSN addressSGSN numberGPRS enhancements support indicator32Insert Subscriber DataIMSIMSISDNODB Regional Subscription DataNAMGPRS Subscription DataSubscribed Charging CharacteristicsAccess Restriction Data33Attach AcceptAttach resultRAIForc

22、e to standbyPeriodic RA update timerRadio priority for SMSRadio priority for TOM8P-TMSI signatureAllocated P-TMSINegotiated READY timerCell Notification34Attach Complete若SGSN为MS重分配了P-TMSI，则MS要向SGSN发送Attach Complete消息予以确认35Requested NSAPIRequested LLC SAPIRequested QoSRequested PDP AddressAccess Point NameActive PDP Context Request36GTP headerIMSIMSISDNEnd User AddressAccess Point NameNSAPISGSN Address for