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1、GPRS信令流程概览姜汉荣爱立信技术支持部/Beijing ELS2024/9/251GPRS信令流程概览安排l讨论GPRS概念lGPRS部分参数的含义l描述部分GPRS相关的信令流程l交流讨论2024/9/252GPRS信令流程概览GPRS网络结构实体图 2024/9/253GPRS信令流程概览GPRS网络信令结构图2024/9/254GPRS信令流程概览Gb接口描述l连接BSS/PCU和SGSNl可以同时传输数据和信令（SNDCP/ SM, GMM, SMS ）2024/9/255GPRS信令流程概览Gr接口描述l连接GSN和HLRl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
2、数据位置删除短消息的发送2024/9/256GPRS信令流程概览Gn接口描述lGSN之间的接口l有时也包含Gom/Gp接口l完成功能如下：GTP业务操作维护DNS查询漫游功能2024/9/257GPRS信令流程概览Gi接口描述lGGSN与外部网络(internet)的接口l完全的IP协议l参与手机IP地址的分配2024/9/258GPRS信令流程概览参数概念lAPN: Access Point NamelQoS: Quality of ServicelAddr: 手机IP地址（静态/动态）2024/9/259GPRS信令流程概览GPRS ATTACH2024/9/2510GPRS信令流程概览G
3、b消息（Fr/NS）lFrame: 118 Captured at: +05:51.639lLength: 69 From: User Status: OklFrame Relay: Type: User-Data lFrame Relay: FCS: 0x581DlFrame Relay: Frame - Relay Header: 6353 lFrame Relay: 000110.1101. DLCI: 109lFrame Relay: .0. C/RlFrame Relay: .0. EA1lFrame Relay: .0. FECNlFrame Relay: .0. BECNlFra
4、me Relay: .0. DElFrame Relay: .1 EA2lNS: PDU Type: 0 - NS-UNITDATA lNS: Spare Octet: 0 lNS: BVCI: 508 2024/9/2511GPRS信令流程概览Gb消息（BSSGP）lBSSGP: PDU Type: 1 - UL-UNITDATA lBSSGP: TLLI: 0x7F430E5F lBSSGP: QoS ProfilelBSSGP: Bit Rate: 0 x 100 bits/sec lBSSGP: Precedence: 0 - High Priority lBSSGP: .1. - R
5、adio Interface Uses RLC/MAC-UNITDATA Functionality lBSSGP: .0. - The SDU Contains Signalling lBSSGP: 0011. - ReservedlBSSGP: Information Element Type: 8 - Cell Identifier lBSSGP: IE Length: 8 lBSSGP: MCC Digits: 460 lBSSGP: MNC Digits: 00 lBSSGP: Location Area Code (LAC): 12638 lBSSGP: RAC: 1 lBSSGP
6、: Cell Identity (CI) Value: 341 lBSSGP: Information Element Type: 0 - Alignment Octets lBSSGP: IE Length: 0 lBSSGP: Information Element Type: 14 - LLC-SDU lBSSGP: IE Length: 39 2024/9/2512GPRS信令流程概览Gb消息（LLC/GSM L3）lLLC(GPRS): Frame Check Sequence Field: 0x93093A lLLC(GPRS): SAPI: 1 - GPRS Mobility M
7、anagement (GMM) lLLC(GPRS): .0. - C/R (Command/Response)lLLC(GPRS): 0. - Protocol DiscriminatorlLLC(GPRS): .00. - SparelLLC(GPRS): 110. - UI Format lLLC(GPRS): .00. - ReservedlLLC(GPRS): Unconfirmed Sequence Number N(U): 0lLLC(GPRS): .0. - No Encryption lLLC(GPRS): .1 - Protected Mode BitlGSM L3: Pr
8、otocol Discriminator: Mobility Management Messages for GPRS lGSM L3: TI Flag: The Message is sent from the side that originates the TI lGSM L3: Transaction ID: 02024/9/2513GPRS信令流程概览Gb消息（GMM/SM）lGMM/SM: Message Type: 1 - Attach Request lGMM/SM: IE Type: MS network capabilitylGMM/SM: Length: 1 lGMM/S
9、M: MS value: 244 lGMM/SM: 1. :GEA1 :Encryption algorithm GEA/1 available lGMM/SM: .1. :SM capabilities via dedicated channels :Supported lGMM/SM: .1. :SM capabilities via GPRS channels :Supported lGMM/SM: .1. :UCS2 support :No preference between the default alphabet and the UCS2 lGMM/SM: .01. :SS Sc
10、reening Indicator :capability of handling of ellipsis notation l and phase 2 error handlinglGMM/SM: .0. :SoLSA Capability :The ME does not support SoLSA lGMM/SM: .0 :Padding bitlGMM/SM: IE Type: Attach typelGMM/SM: Type of attach: GPRS attach: 1 2024/9/2514GPRS信令流程概览Gb消息（GMM/SM）lGMM/SM: IE Type: Cip
11、hering key sequence numberlGMM/SM: .111. Key sequence: 7 No key is available(MS-network)/Reserved(network-MS) lGMM/SM: IE Type: DRX parameterlGMM/SM: Split PG Cycle Code: 8 lGMM/SM: Split on CCCH: Split pg cycle on CCCH is not supported by the mobile station 0 lGMM/SM: Non-DRX timer: Max. 4 sec non-
12、DRX mode after transfer state 3lGMM/SM: IE Type: Mobile identitylGMM/SM: Length: 8 lGMM/SM: Odd/even indicator: odd number of identity digits lGMM/SM: Type of identity: IMSI lGMM/SM: Identity digits: 4630 lGMM/SM: IE Type: Routing area identificationlGMM/SM: MCC digits: 000 lGMM/SM: MNC digits: 00 l
13、GMM/SM: Location area code: 0 lGMM/SM: Routing area code: 0 lGMM/SM: IE Type: MS Radio Access capabilitylGMM/SM: Length: 10 lGMM/SM: Value: 0x14D3823148FFCC81E080 2024/9/2515GPRS信令流程概览Gr消息（MTP）l 1. dc: BIB l .1011100 : BSN l 1. e5: FIB l .1100101 : FSN l 00. 3f: 未用l .111111 : LI=0x3f .111111l 10. 83
14、: SIO_SSF l .00. : 未用l .0011 : SIO_SI SCCP 消息l 00000101 05: DPC 3-FF- 5l 11111111 ff: DPC l 00000011 03: DPC l 00000101 05: OPC 1-FF- 5l 11111111 ff: OPC l 00000001 01: OPC l 00000100 04: SLS 0x4l 2024/9/2516GPRS信令流程概览Gr消息（SCCP）l 00001001 09: 单位数据 UDT l 00000001 01: 连接协议类型 有序的无连接类 l 10010011 93: 被叫用
15、户地址表示语 l .1 : 信令点表示语包括信令点 l .1. : SSN 表示语包括SSN l .0100. : 全局码翻译类型,编码计划,设计,地址性质 l .0. : 路由表示语GT选路由 l 被叫用户 PC: 01-ff-05l 00000110 06: 归属位置寄存器(HLR) l .0001 71: 编码设计 BCD,奇数个数字 l 0111. : 编码计划 ISDN/移动编号计划 l .0100 04: 0000100 国际号码 l 被叫用户 值 : 8677l 00010010 12: 主叫用户地址表示语 l .0 : 信令点表示语未包括信令点 l .1. : SSN 表示语包
16、括SSN l .0100. : 全局码翻译类型,编码计划,设计,地址性质 l .0. : 路由表示语GT选路由 l 10010101 95: 服务GRPS支持接点 l .0010 12: 编码设计 BCD,偶数个数字 l 0001. : 编码计划 ISDN/电话编号计划 l .0100 04: 0000100 国际号码 l 主叫用户 值 : 8613742106 2024/9/2517GPRS信令流程概览Gr消息(TCAP)l=TCAP 部分=l 01100010 62: 开始 l 01001000 48: 起源 ID l 起源 ID值 : 01D644l 01101011 6b: TCAP
17、对话部分 l 00101000 28: 外部 l 00000110 06: 目标识别 l 非结构化对话值: 001l 10100000 a0: 目标识别 l 01100000 60: 对话类型 对话请求 l 10000000 80: 协议版本 l 协议版本值 : 0780l 10100001 a1: 应用上下文名称 l 00000110 06: 目标识别 l 应用上下文名称值: 003l 01101100 6c: TCAP 成分部分 l 2024/9/2518GPRS信令流程概览Gr消息(MAP)l=Map 部分=l 10100001 a1: 成分调用 l 00000010 02: 调用 ID
18、 l 调用 ID值 : 01l 00000010 02: 本地操作码 l 00010111 17: MAP 操作码 GPRS更新位置 l 00110000 30: .GPRS更新位置 l 00000100 04: .IMSI l IMSI值 : .4677l 00000100 04: .SGSN l .0001 91: .编码方案 ISDN/电话方案 l .001. : .地址性质 国际号码 l 1. : .扩展表示语 无扩展 l SGSN值 : .8613742106l 00000100 04: .GSN 地址 l GSN 地址 : 1. 2. 3. 4 l EOC值 : .00002024
19、/9/2519GPRS信令流程概览PDP激活过程2024/9/2520GPRS信令流程概览Gn消息（IP header)lIP: Version = 4 lIP: IHL = 20 ByteslIP: Type of Service: 0x00 lIP: Routine lIP: Normal Delay lIP: Normal Throughput lIP: Normal Reliability lIP: Total Length = 157 lIP: Identification = 8867 lIP: Flags & Fragment Offset: 0x0000 lIP: 0. Res
20、ervedlIP: .0. May Fragment lIP: .0. Last Fragment lIP: Fragment Offset = 0 ByteslIP: Time to Live = 63 Seconds/Hops lIP: Protocol: 17 UDP lIP: Header Checksum = 0xA495 lIP: Source Address = 211.138.6.129 211.138.6.129 lIP: Destination Address = 211.138.6.130 211.138.6.130 2024/9/2521GPRS信令流程概览Gn消息(b
21、asic GTP)lUDP: Source Port = GPRS Tunnelling Protocol (GTP) lUDP: Destination Port = GPRS Tunnelling Protocol (GTP) lUDP: Length = 137 lUDP: CheckSum = 0x04CA lGTP: 000. Version: 0 lGTP: .1. Protocol Type GTP lGTP: .0 SNDCP N-PDU Number Not Present lGTP: .1111. ReservedlGTP: Message Type: 16 - Creat
22、e PDP Context Request lGTP: Message Length: 109 lGTP: Sequence Number: 1 lGTP: Flow Label: 0 lGTP: SNDCP N-PDULLC Number: 255 - Not Used lGTP: Reserved: 16777215 lGTP: Tunnel Identifier (TID)lGTP: MCC Digits: 460 lGTP: MNC Digits: 00 lGTP: MSIN Digits: 4046000002 lGTP: NSAPI: 52024/9/2522GPRS信令流程概览G
23、n消息(QoS)lGTP: IE Type: 6 - Quality of Service (QoS) lGTP: Quality of Service (QoS): lGTP: Delay class: Delay class 4 (best effort) lGTP: Reliability class: Unacknowledged GTP and LLC; Acknowledged RLC, Protected data lGTP: Peak throughput: Up to 128000 octet/s lGTP: Precedence class: Normal priority
24、 lGTP: Mean throughput: Best effort lGTP: IE Type: 14 - Recovery lGTP: Restart Counter: 0 lGTP: IE Type: 15 - Selection Mode lGTP: Selection Mode Value: 1 - MS Provided APN, Subscription Not Verified lGTP: IE Type: 16 - Flow Label Data I lGTP: Flow Label Data: 0 lGTP: IE Type: 17 - Flow Label Signal
25、ling lGTP: Flow Label Signalling: 0 lGTP: IE Type: 128 - End User Address lGTP: IE Length: 2 2024/9/2523GPRS信令流程概览Gn消息(APN)lGTP: PDP Type Organization: 1 - IETF lGTP: PDP Type Number: 33 - IPv4 lGTP: IE Type: 131 - Access Point Name lGTP: IE Length: 6 lGTP: APN Value: .cmnet lGTP: IE Type: 132 - Pro
26、tocol Configuration Options lGTP: IE Length: 53 lGTP: Configuration protocol: PPP for use with IP PDP type lGTP: Protocol ID: PAP lGTP: Length of protocol ID: 6 lPAP: Code = 1 Authenticate Request lPAP: Identifier = 1 lPAP: Length = 6 lPAP: Peer ID Length = 0 lPAP: Peer ID = lPAP: Password Length =
27、0 lPAP: Password = lGTP: Protocol ID: IPCP lGTP: Length of protocol ID: 40 2024/9/2524GPRS信令流程概览Gn消息(IP控制协议）lIPCP: Code = Configure-Request lIPCP: Identifier = 1 lIPCP: Length = 40 lIPCP: lIPCP: Option Type = 2 IP Compression Protocol lIPCP: Length = 6 lIPCP: Protocol = Van Jacobson Compressed TCP/I
28、P lIPCP: Max-Slot-ID = 15 lIPCP: Comp-Slot-ID = 1 Slot Identifier May Be Compressed lIPCP: lIPCP: Option Type = 3 IP Address lIPCP: Length = 6 lIPCP: IP Address = 0.0.0.0 (Peer Provide The IP Address Info.) lIPCP: 2024/9/2525GPRS信令流程概览Gn消息(DNS)lIPCP: Option Type = 129 Primary DNS Server Address lIPC
29、P: Length = 6 lIPCP: Primery DNS Address: 0.0.0.0 lIPCP: lIPCP: Option Type = 130 Primary NBNS Server Address lIPCP: Length = 6 lIPCP: Primery NBNS Address: 0.0.0.0 lIPCP: lIPCP: Option Type = 131 Secondary DNS Server Address lIPCP: Length = 6 lIPCP: Primery DNS Address: 0.0.0.0 lIPCP: lIPCP: Option
30、 Type = 132 Secondary NBNS Server Address lIPCP: Length = 6 lIPCP: Primery DNS Address: 0.0.0.0 2024/9/2526GPRS信令流程概览Gn消息(计费部分）lGTP: IE Type: 133 - GSN Address lGTP: IE Length: 4 lGTP: GSN Address: 211.138.6.129 lGTP: IE Type: 133 - GSN Address lGTP: IE Length: 4 lGTP: GSN Address: 211.138.6.129 lGT
31、P: IE Type: 134 - MSISDN lGTP: IE Length: 8 lGTP: MSISDN number: lGTP: 1. No Extension lGTP: .001. Nature Of Address: International Number lGTP: .0001 Numbering Plan Indicator: ISDN/Telephony Numbering Plan lGTP: Number: 86 2024/9/2527GPRS信令流程概览总结lGPRS实体/信令结构l各个接口功能lATTACH 过程lPDP 激活过程2024/9/2528GPRS信令流程概览课程资料lGPRS System SurveylGPRS CSS OperationlGPRS BSS Operationl北京ELS(Ericsson Local Support)lHotline: lEmail: gs-2024/9/2529GPRS信令流程概览谢谢 ！ ！ ！讨论开始2024/9/2530GPRS信令流程概览
