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1、2023/7/6,GPRS信令流程概览,1,GPRS信令流程概览,2023/7/6,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,2023/7/6,GPRS信令流程概览,3,GPRS网络结构实体图,2023/7/6,GPRS信令流程概览,4,GPRS网络信令结构图,2023/7/6,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）,2023/7/6,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/
2、删除用户数据位置删除短消息的发送,2023/7/6,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,2023/7/6,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,2023/7/6,GPRS信令流程概览,9,参数概念,APN:Access Point NameQoS:Quality of ServiceAddr:手机IP地址（静态/动态）,2023/7/6,GPRS信令流程概览,10,GPRS ATTACH,2023/7/6,GPRS
3、信令流程概览,11,Gb消息（Fr/NS）,Frame:118 Captured at:+05:51.639Length:69 From:User Status:OkFrame Relay:Type:User-Data Frame Relay:FCS:0 x581DFrame Relay:Frame-Relay Header:6353 Frame Relay:000110.1101.DLCI:109Frame Relay:.0.C/RFrame Relay:.0.EA1Frame Relay:.0.FECNFrame Relay:.0.BECNFrame Relay:.0.DEFrame Re
4、lay:.1 EA2NS:PDU Type:0-NS-UNITDATA NS:Spare Octet:0 NS:BVCI:508,2023/7/6,GPRS信令流程概览,12,Gb消息（BSSGP）,BSSGP:PDU Type:1-UL-UNITDATA BSSGP:TLLI:0 x7F430E5F BSSGP:QoS ProfileBSSGP:Bit Rate:0 x 100 bits/sec BSSGP:Precedence:0-High Priority BSSGP:.1.-Radio Interface Uses RLC/MAC-UNITDATA Functionality BSSG
5、P:.0.-The SDU Contains Signalling BSSGP:0011.-ReservedBSSGP:Information Element Type:8-Cell Identifier BSSGP:IE Length:8 BSSGP:MCC Digits:460 BSSGP:MNC Digits:00 BSSGP:Location Area Code(LAC):12638 BSSGP:RAC:1 BSSGP:Cell Identity(CI)Value:341 BSSGP:Information Element Type:0-Alignment Octets BSSGP:I
6、E Length:0 BSSGP:Information Element Type:14-LLC-SDU BSSGP:IE Length:39,2023/7/6,兰州移动 GPRS信令流程概览,13,Gb消息（LLC/GSM L3）,LLC(GPRS):Frame Check Sequence Field:0 x93093A LLC(GPRS):SAPI:1-GPRS Mobility Management(GMM)LLC(GPRS):.0.-C/R(Command/Response)LLC(GPRS):0.-Protocol DiscriminatorLLC(GPRS):.00.-Spare
7、LLC(GPRS):110.-UI Format LLC(GPRS):.00.-ReservedLLC(GPRS):Unconfirmed Sequence Number N(U):0LLC(GPRS):.0.-No Encryption LLC(GPRS):.1-Protected Mode BitGSM L3:Protocol Discriminator:Mobility Management Messages for GPRS GSM L3:TI Flag:The Message is sent from the side that originates the TI GSM L3:Tr
8、ansaction ID:0,2023/7/6,GPRS信令流程概览,14,Gb消息（GMM/SM）,GMM/SM:Message Type:1-Attach Request GMM/SM:IE Type:MS network capabilityGMM/SM:Length:1 GMM/SM:MS value:244 GMM/SM:1.:GEA1:Encryption algorithm GEA/1 available GMM/SM:.1.:SM capabilities via dedicated channels:Supported GMM/SM:.1.:SM capabilities v
9、ia GPRS channels:Supported GMM/SM:.1.:UCS2 support:No preference between the default alphabet and the UCS2 GMM/SM:.01.:SS Screening Indicator:capability of handling of ellipsis notation and phase 2 error handlingGMM/SM:.0.:SoLSA Capability:The ME does not support SoLSA GMM/SM:.0:Padding bitGMM/SM:IE
10、 Type:Attach typeGMM/SM:Type of attach:GPRS attach:1,2023/7/6,GPRS信令流程概览,15,Gb消息（GMM/SM）,GMM/SM:IE Type:Ciphering key sequence numberGMM/SM:.111.Key sequence:7 No key is available(MS-network)/Reserved(network-MS)GMM/SM:IE Type:DRX parameterGMM/SM:Split PG Cycle Code:8 GMM/SM:Split on CCCH:Split pg c
11、ycle on CCCH is not supported by the mobile station 0 GMM/SM:Non-DRX timer:Max.4 sec non-DRX mode after transfer state 3GMM/SM:IE Type:Mobile identityGMM/SM:Length:8 GMM/SM:Odd/even indicator:odd number of identity digits GMM/SM:Type of identity:IMSI GMM/SM:Identity digits:460002423301430 GMM/SM:IE
12、Type:Routing area identificationGMM/SM:MCC digits:000 GMM/SM:MNC digits:00 GMM/SM:Location area code:0 GMM/SM:Routing area code:0 GMM/SM:IE Type:MS Radio Access capabilityGMM/SM:Length:10 GMM/SM:Value:0 x14D3823148FFCC81E080,2023/7/6,GPRS信令流程概览,16,Gr消息（MTP）,1.dc:BIB.1011100:BSN 1.e5:FIB.1100101:FSN
13、00.3f:未用.111111:LI=0 x3f.111111 10.83:SIO_SSF.00.:未用.0011:SIO_SI SCCP 消息 00000101 05:DPC 3-FF-5 11111111 ff:DPC 00000011 03:DPC 00000101 05:OPC 1-FF-5 11111111 ff:OPC 00000001 01:OPC 00000100 04:SLS 0 x4,2023/7/6,GPRS信令流程概览,17,Gr消息（SCCP）,00001001 09:单位数据 UDT 00000001 01:连接协议类型 有序的无连接类 10010011 93:被叫
14、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-05 00000110 06:归属位置寄存器(HLR).0001 71:编码设计 BCD,奇数个数字 0111.:编码计划 ISDN/移动编号计划.0100 04:0000100 国际号码 00010010 12: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 10010101 95:服务GRPS
15、支持接点.0010 12:编码设计 BCD,偶数个数字 0001.:编码计划 ISDN/电话编号计划.0100 04:0000100 国际号码 主叫用户 值:8613742106,2023/7/6,GPRS信令流程概览,18,Gr消息(TCAP),=TCAP 部分=01100010 62:开始 01001000 48:起源 ID 起源 ID值:01D644 01101011 6b:TCAP 对话部分 00101000 28:外部 00000110 06:目标识别 10100000 a0:目标识别 01100000 60:对话类型 对话请求 10000000 80:协议版本 协议版本值:0780
16、 10100001 a1:应用上下文名称 00000110 06:目标识别 应用上下文名称值:04000001002003 01101100 6c:TCAP 成分部分,2023/7/6,GPRS信令流程概览,19,Gr消息(MAP),=Map 部分=10100001 a1:成分调用 00000010 02:调用 ID 调用 ID值:01 00000010 02:本地操作码 00010111 17:MAP 操作码 GPRS更新位置 00110000 30:.GPRS更新位置 00000100 04:.IMSI IMSI值:.460003149056077 00000100 04:.SGSN.00
17、01 91:.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:.8613742106 00000100 04:.GSN 地址 GSN 地址:1.2.3.4 EOC值:.0000,2023/7/6,GPRS信令流程概览,20,PDP激活过程,2023/7/6,GPRS信令流程概览,21,Gn消息（IP header),IP:Version=4 IP:IHL=20 BytesIP:Type of Service:0 x00 IP:Routine IP:Normal Delay IP:Normal Throughput IP:Normal Rel
18、iability IP:Total Length=157 IP:Identification=8867 IP:Flags&Fragment Offset:0 x0000 IP:0.ReservedIP:.0.May Fragment IP:.0.Last Fragment IP:Fragment Offset=0 BytesIP:Time to Live=63 Seconds/Hops IP:Protocol:17 UDP IP:Header Checksum=0 xA495 IP:Source Address=211.138.6.129 211.138.6.129 IP:Destinatio
19、n Address=211.138.6.130 211.138.6.130,2023/7/6,兰州移动 GPRS信令流程概览,22,Gn消息(basic GTP),UDP:Source Port=GPRS Tunnelling Protocol(GTP)UDP:Destination Port=GPRS Tunnelling Protocol(GTP)UDP:Length=137 UDP:CheckSum=0 x04CA GTP:000.Version:0 GTP:.1.Protocol Type GTP GTP:.0 SNDCP N-PDU Number Not Present GTP:.1
20、111.ReservedGTP:Message Type:16-Create PDP Context Request GTP:Message Length:109 GTP:Sequence Number:1 GTP:Flow Label:0 GTP:SNDCP N-PDULLC Number:255-Not Used GTP:Reserved:16777215 GTP:Tunnel Identifier(TID)GTP:MCC Digits:460 GTP:MNC Digits:00 GTP:MSIN Digits:4046000002 GTP:NSAPI:5,2023/7/6,GPRS信令流
21、程概览,23,Gn消息(QoS),GTP:IE Type:6-Quality of Service(QoS)GTP:Quality of Service(QoS):GTP:Delay class:Delay class 4(best effort)GTP:Reliability class:Unacknowledged GTP and LLC;Acknowledged RLC,Protected data GTP:Peak throughput:Up to 128000 octet/s GTP:Precedence class:Normal priority GTP:Mean throughp
22、ut:Best effort GTP:IE Type:14-Recovery GTP:Restart Counter:0 GTP:IE Type:15-Selection Mode GTP:Selection Mode Value:1-MS Provided APN,Subscription Not Verified GTP:IE Type:16-Flow Label Data I GTP:Flow Label Data:0 GTP:IE Type:17-Flow Label Signalling GTP:Flow Label Signalling:0 GTP:IE Type:128-End
23、User Address GTP:IE Length:2,2023/7/6,GPRS信令流程概览,24,Gn消息(APN),GTP:PDP Type Organization:1-IETF GTP:PDP Type Number:33-IPv4 GTP:IE Type:131-Access Point Name GTP:IE Length:6 GTP:APN Value:.cmnet GTP:IE Type:132-Protocol Configuration Options GTP:IE Length:53 GTP:Configuration protocol:PPP for use wit
24、h IP PDP type GTP:Protocol ID:PAP GTP:Length of protocol ID:6 PAP:Code=1 Authenticate Request PAP:Identifier=1 PAP:Length=6 PAP:Peer ID Length=0 PAP:Peer ID=PAP:Password Length=0 PAP:Password=GTP:Protocol ID:IPCP GTP:Length of protocol ID:40,2023/7/6,GPRS信令流程概览,25,Gn消息(IP控制协议）,IPCP:Code=Configure-Re
25、quest IPCP:Identifier=1 IPCP:Length=40 IPCP:IPCP:Option Type=2 IP Compression Protocol IPCP:Length=6 IPCP:Protocol=Van Jacobson Compressed TCP/IP IPCP:Max-Slot-ID=15 IPCP:Comp-Slot-ID=1 Slot Identifier May Be Compressed IPCP:IPCP:Option Type=3 IP Address IPCP:Length=6 IPCP:IP Address=0.0.0.0(Peer Pr
26、ovide The IP Address Info.)IPCP:,2023/7/6,兰州移动 GPRS信令流程概览,26,Gn消息(DNS),IPCP:Option Type=129 Primary DNS Server Address IPCP:Length=6 IPCP:Primery DNS Address:0.0.0.0 IPCP:IPCP:Option Type=130 Primary NBNS Server Address IPCP:Length=6 IPCP:Primery NBNS Address:0.0.0.0 IPCP:IPCP:Option Type=131 Second
27、ary DNS Server Address IPCP:Length=6 IPCP:Primery DNS Address:0.0.0.0 IPCP:IPCP:Option Type=132 Secondary NBNS Server Address IPCP:Length=6 IPCP:Primery DNS Address:0.0.0.0,2023/7/6,GPRS信令流程概览,27,Gn消息(计费部分）,GTP:IE Type:133-GSN Address GTP:IE Length:4 GTP:GSN Address:211.138.6.129 GTP:IE Type:133-GSN
28、 Address GTP:IE Length:4 GTP:GSN Address:211.138.6.129 GTP:IE Type:134-MSISDN GTP:IE Length:8 GTP:MSISDN number:GTP:1.No Extension GTP:.001.Nature Of Address:International Number GTP:.0001 Numbering Plan Indicator:ISDN/Telephony Numbering Plan,2023/7/6,兰州移动 GPRS信令流程概览,28,总结,GPRS实体/信令结构各个接口功能ATTACH 过程PDP 激活过程,2023/7/6,GPRS信令流程概览,29,课程资料,GPRS System SurveyGPRS CSS OperationGPRS BSS Operation,
