《GPRS信令流程概览》PPT课件

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1、GPRS信令流程概览姜汉荣爱立信技术支持部/BeijingELS2021/7/151兰州移动GPRS信令流程概览安排讨论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2021/7/152兰州移动GPRS信令流程概览GPRS网络结构实体图2021/7/153兰州移动GPRS信令流程概览GPRS网络信令结构图2021/7/154兰州移动GPRS信令流程概览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）2021/7/155兰州移动GP

2、RS信令流程概览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2021/7/156兰州移动GPRS信令流程概览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2021/7/157兰州移动GPRS信令流程概览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2021/7/158兰州移动GPRS信令流程概览参数概念APN:AccessPointNam

3、eQoS:QualityofServiceAddr:手机IP地址（静态/动态）2021/7/159兰州移动GPRS信令流程概览GPRSATTACH2021/7/1510兰州移动GPRS信令流程概览Gb消息（Fr/NS）Frame:118Capturedat:+05:51.639Length:69From:UserStatus:OkFrameRelay:Type:User-DataFrameRelay:FCS:0x581DFrameRelay:Frame-RelayHeader:6353<18D1>Fram

4、eRelay:000110..1101....DLCI:109FrameRelay:......0.........C/RFrameRelay:.......0........EA1FrameRelay:............0...FECNFrameRelay:.............0..BECNFrameRelay:..............0.DEFrameRelay:...............1EA2NS:PDUType:0-NS-UNITDATA<00>NS:SpareOctet:0

5、<00>NS:BVCI:508<01FC>2021/7/1511兰州移动GPRS信令流程概览Gb消息（BSSGP）BSSGP:PDUType:1-UL-UNITDATA<01>BSSGP:TLLI:0x7F430E5F<7F430E5F>BSSGP:QoSProfileBSSGP:BitRate:0x100bits/sec<0000>BSSGP:Precedence:0-HighPriority<34>BSSGP:.....1..-RadioInterfaceUsesRLC/MAC-UNITDATAFun

6、ctionalityBSSGP:....0...-TheSDUContainsSignallingBSSGP:0011....-ReservedBSSGP:InformationElementType:8-CellIdentifier<08>BSSGP:IELength:8<88>BSSGP:MCCDigits:460<64F0>BSSGP:MNCDigits:00<00>BSSGP:LocationAreaCode(LAC):12638<315E>BSSGP:RAC:1<01>BSSGP:CellIde

7、ntity(CI)Value:341<0155>BSSGP:InformationElementType:0-AlignmentOctets<00>BSSGP:IELength:0<80>BSSGP:InformationElementType:14-LLC-SDU<0E>BSSGP:IELength:392021/7/1512兰州移动GPRS信令流程概览Gb消息（LLC/GSML3）LLC(GPRS):FrameCheckSequenceField:0x93093A<93093A>LLC(GPR

8、S):SAPI:1-GPRSMobilityManagement(GMM)<01>LLC(GPRS):.0......-C/R(Command/Response)LLC(GPRS):0.......-ProtocolDiscriminatorLLC(GPRS):..00....-SpareLLC(GPRS):110.............-UIFormatLLC(GPRS):...00...........-Re