GPRS信令流程概览

2020/5/6,GPRS信令流程概览,1,GPRS信令流程概览,2020/5/6,GPRS信令流程概览,2,安排,讨论GPRS概念GPRS部分参数的含义描述部分GPRS相关的信令流程交流讨论,2020/5/6,GPRS信令流程概览,3,GPRS网络结构实体图,2020/5/6,GPRS信令流程概览,4,GPRS网络信令结构图,2020/5/6,GPRS信令流程概览,5,Gb接口描述,连接BSS/PCU和SGSN可以同时传输数据和信令（SNDCP/SM,GMM,SMS）,2020/5/6,GPRS信令流程概览,6,Gr接口描述,连接GSN和HLR与电路交换系统中功能相同参数的发送位置更新插入/删除用户数据位置删除短消息的发送,2020/5/6,GPRS信令流程概览,7,Gn接口描述,GSN之间的接口有时也包含Gom/Gp接口完成功能如下：GTP业务操作维护DNS查询漫游功能,2020/5/6,GPRS信令流程概览,8,Gi接口描述,GGSN与外部网络(internet)的接口完全的IP协议参与手机IP地址的分配,2020/5/6,GPRS信令流程概览,9,参数概念,APN:AccessPointNameQoS:QualityofServiceAddr:手机IP地址（静态/动态）,2020/5/6,GPRS信令流程概览,10,GPRSATTACH,2020/5/6,GPRS信令流程概览,11,Gb消息（Fr/NS）,Frame:118Capturedat:+05:51.639Length:69From:UserStatus:OkFrameRelay:Type:User-DataFrameRelay:FCS:0 x581DFrameRelay:Frame-RelayHeader:6353FrameRelay:000110.1101.DLCI:109FrameRelay:.0.C/RFrameRelay:.0.EA1FrameRelay:.0.FECNFrameRelay:.0.BECNFrameRelay:.0.DEFrameRelay:.1EA2NS:PDUType:0-NS-UNITDATANS:SpareOctet:0NS:BVCI:508,2020/5/6,GPRS信令流程概览,12,Gb消息（BSSGP）,BSSGP:PDUType:1-UL-UNITDATABSSGP:TLLI:0 x7F430E5FBSSGP:QoSProfileBSSGP:BitRate:0 x100bits/secBSSGP:Precedence:0-HighPriorityBSSGP:.1.-RadioInterfaceUsesRLC/MAC-UNITDATAFunctionalityBSSGP:.0.-TheSDUContainsSignallingBSSGP:0011.-ReservedBSSGP:InformationElementType:8-CellIdentifierBSSGP:IELength:8BSSGP:MCCDigits:460BSSGP:MNCDigits:00BSSGP:LocationAreaCode(LAC):12638BSSGP:RAC:1BSSGP:CellIdentity(CI)Value:341BSSGP:InformationElementType:0-AlignmentOctetsBSSGP:IELength:0BSSGP:InformationElementType:14-LLC-SDUBSSGP:IELength:39,2020/5/6,兰州移动GPRS信令流程概览,13,Gb消息（LLC/GSML3）,LLC(GPRS):FrameCheckSequenceField:0 x93093ALLC(GPRS):SAPI:1-GPRSMobilityManagement(GMM)LLC(GPRS):.0.-C/R(Command/Response)LLC(GPRS):0.-ProtocolDiscriminatorLLC(GPRS):.00.-SpareLLC(GPRS):110.-UIFormatLLC(GPRS):.00.-ReservedLLC(GPRS):UnconfirmedSequenceNumberN(U):0LLC(GPRS):.0.-NoEncryptionLLC(GPRS):.1-ProtectedModeBitGSML3:ProtocolDiscriminator:MobilityManagementMessagesforGPRSGSML3:TIFlag:TheMessageissentfromthesidethatoriginatestheTIGSML3:TransactionID:0,2020/5/6,GPRS信令流程概览,14,Gb消息（GMM/SM）,GMM/SM:MessageType:1-AttachRequestGMM/SM:IEType:MSnetworkcapabilityGMM/SM:Length:1GMM/SM:MSvalue:244GMM/SM:1.:GEA1:EncryptionalgorithmGEA/1availableGMM/SM:.1.:SMcapabilitiesviadedicatedchannels:SupportedGMM/SM:.1.:SMcapabilitiesviaGPRSchannels:SupportedGMM/SM:.1.:UCS2support:NopreferencebetweenthedefaultalphabetandtheUCS2GMM/SM:.01.:SSScreeningIndicator:capabilityofhandlingofellipsisnotationandphase2errorhandlingGMM/SM:.0.:SoLSACapability:TheMEdoesnotsupportSoLSAGMM/SM:.0:PaddingbitGMM/SM:IEType:AttachtypeGMM/SM:Typeofattach:GPRSattach:1,2020/5/6,GPRS信令流程概览,15,Gb消息（GMM/SM）,GMM/SM:IEType:CipheringkeysequencenumberGMM/SM:.111.Keysequence:7Nokeyisavailable(MS-network)/Reserved(network-MS)GMM/SM:IEType:DRXparameterGMM/SM:SplitPGCycleCode:8GMM/SM:SplitonCCCH:SplitpgcycleonCCCHisnotsupportedbythemobilestation0GMM/SM:Non-DRXtimer:Max.4secnon-DRXmodeaftertransferstate3GMM/SM:IEType:MobileidentityGMM/SM:Length:8GMM/SM:Odd/evenindicator:oddnumberofidentitydigitsGMM/SM:Typeofidentity:IMSIGMM/SM:Identitydigits:460002423301430GMM/SM:IEType:RoutingareaidentificationGMM/SM:MCCdigits:000GMM/SM:MNCdigits:00GMM/SM:Locationareacode:0GMM/SM:Routingareacode:0GMM/SM:IEType:MSRadioAccesscapabilityGMM/SM:Length:10GMM/SM:Value:0 x14D3823148FFCC81E080,2020/5/6,GPRS信令流程概览,16,Gr消息（MTP）,1.dc:BIB.1011100:BSN1.e5:FIB.1100101:FSN00.3f:未用.111111:LI=0 x3f.11111110.83:SIO_SSF.00.:未用.0011:SIO_SISCCP消息0000010105:DPC3-FF-511111111ff:DPC0000001103:DPC0000010105:OPC1-FF-511111111ff:OPC0000000101:OPC0000010004:SLS0 x4,2020/5/6,GPRS信令流程概览,17,Gr消息（SCCP）,0000100109:单位数据UDT0000000101:连接协议类型有序的无连接类1001001193:被叫用户地址表示语.1:信令点表示语包括信令点.1.:SSN表示语包括SSN.0100.:全局码翻译类型,编码计划,设计,地址性质.0.:路由表示语GT选路由被叫用户PC:01-ff-050000011006:归属位置寄存器(HLR).000171:编码设计BCD,奇数个数字0111.:编码计划ISDN/移动编号计划.010004:0000100国际号码被叫用户值:8613931490560770001001012:主叫用户地址表示语.0:信令点表示语未包括信令点.1.:SSN表示语包括SSN.0100.:全局码翻译类型,编码计划,设计,地址性质.0.:路由表示语GT选路由1001010195:服务GRPS支持接点.001012:编码设计BCD,偶数个数字0001.:编码计划ISDN/电话编号计划.010004:0000100国际号码主叫用户值:8613742106,2020/5/6,GPRS信令流程概览,18,Gr消息(TCAP),=TCAP部分=0110001062:开始0100100048:起源ID起源ID值:01D644011010116b:TCAP对话部分0010100028:外部0000011006:目标识别非结构化对话值:0011860501010110100000a0:目标识别0110000060:对话类型对话请求1000000080:协议版本协议版本值:078010100001a1:应用上下文名称0000011006:目标识别应用上下文名称值:04000001002003011011006c:TCAP成分部分,2020/5/6,GPRS信令流程概览,19,Gr消息(MAP),=Map部分=10100001a1:成分调用0000001002:调用ID调用ID值:010000001002:本地操作码0001011117:MAP操作码GPRS更新位置0011000030:.GPRS更新位置0000010004:.IMSIIMSI值:.4600031490560770000010004:.SGSN.000191:.编码方案ISDN/电话方案.001.:.地址性质国际号码1.:.扩展表示语无扩展SGSN值:.86137421060000010004:.GSN地址GSN地址:1.2.3.4EOC值:.0000,2020/5/6,GPRS信令流程概览,20,PDP激活过程,2020/5/6,GPRS信令流程概览,21,Gn消息（IPheader),IP:Version=4IP:IHL=20BytesIP:TypeofService:0 x00IP:RoutineIP:NormalDelayIP:NormalThroughputIP:NormalReliabilityIP:TotalLength=157IP:Identification=8867IP:FlagsAcknowledgedRLC,ProtecteddataGTP:Peakthroughput:Upto128000octet/sGTP:Precedenceclass:NormalpriorityGTP:Meanthroughput:BesteffortGTP:IEType:14-RecoveryGTP:RestartCounter:0GTP:IEType:15-SelectionModeGTP:SelectionModeValue:1-MSProvidedAPN,SubscriptionNotVerifiedGTP:IEType:16-FlowLabelDataIGTP:FlowLabelData:0GTP:IEType:17-FlowLabelSignallingGTP:FlowLabelSignalling:0GTP:IEType:128-EndUserAddressGTP:IELength:2,2020/5/6,GPRS信令流程概览,24,Gn消息(APN),GTP:PDPTypeOrganization:1-IETFGTP:PDPTypeNumber:33-IPv4GTP:IEType:131-AccessPointNameGTP:IELength:6GTP:APNValue:.cmnetGTP:IEType:132-ProtocolConfigurationOptionsGTP:IELength:53GTP:Configurationprotocol:PPPforusewithIPPDPtypeGTP:ProtocolID:PAPGTP:LengthofprotocolID:6PAP:Code=1AuthenticateRequestPAP:Identifier=1PAP:Length=6PAP:PeerIDLength=0PAP:PeerID=PAP:PasswordLength=0PAP:Password=GTP:ProtocolID:IPCPGTP:LengthofprotocolID:40,2020/5/6,GPRS信令流程概览,25,Gn消息(IP控制协议）,IPCP:Code=Configure-RequestIPCP:Identifier=1IPCP:Length=40IPCP:IPCP:OptionType=2IPCompressionProtocolIPCP:Length=6IPCP:Protocol=VanJacobsonCompressedTCP/IPIPCP:Max-Slot-ID=15IPCP:Comp-Slot-ID=1SlotIdentifierMayBeCompressedIPCP:IPCP:OptionType=3IPAddressIPCP:Length=6IPCP:IPAddress=0.0.0.0(PeerProvideTheIPAddressInfo.)IPCP:,2020/5/6,兰州移动GPRS信令流程概览,26,Gn消息(DNS),IPCP:OptionType=129PrimaryDNSServerAddressIPCP:Length=6IPCP:PrimeryDNSAddress:0.0.0.0IPCP:IPCP:OptionType=130PrimaryNBNSServerAddressIPCP:Length=6IPCP:PrimeryNBNSAddress:0.