GPRS核心网介绍

诺基亚GPRS核心网介绍无线部分SGSNGGSNIntranetGGSNInternetCG计费中心RouterServer企业网络BGInterPLMNNetworkLIGFWDNS骨干网FW业务平台GGSNGPRS网络结构GPRS骨干网的功能•将核心网元连接在一起；•与外部网络或GPRS用户隔离，且不可见的专用IP网络；•在GPRS特定隧道（GTP）中传送用户IP通信；•在GSN之间传送GPRS特定信令；•传送计费数据，从GSN至计费网关；•传输GPRS核心网管理信息；SGSN的功能•鉴权、授权；•至GGSN的GTP隧道；•加密和压缩；•移动性管理；•会话管理；•与HLR、MSC/VLR交互作用；•计费和统计；•NMS接口；GGSN的功能•与外部数据网络的接口；•类似于一个数据网络路由器；•将最终用户数据封装于GTP中，送至正确的SGSN；•将源于移动网络的数据包传送至正确的目的地；•过滤最终用户通信；•收集数据网络使用的计费和统计信息；CG的功能•收集来自相关网元的事件记录•对事件记录进行缓存•处理CDR•将处理后的CDR发送给后期处理系统DNS的功能•在GPRS骨干网网络中（GPRS网内和网间），用于将逻辑名映射至IP地址；•APN至GGSN的IP地址；•RAID至SGSN的IP地址；•每个SGSN应可访问DNS，以进行映射；•SGSN仅需与本地DNS通信；•不同运营者的DNS可直接相连，或者通过“运营商的DNS根目录”相连；SGSN配置实例SG51SGND1PCS2GSGSNNewDelivery2SG001511PCSDisplayControllerVT55102COM01H50031PCSLamppanelsforalarms2SG002362PCSSGSNPlankingplateset2SG004241PCSNMSLinkDigitalG7032SG005201PCSSGSNSG5CabinetsCoaxialInterface2SG0059115PCSET4E-TC,CoaxialInterface2SG005231PCSSG5CapacityExtensionKit2SG001051PCSSGSNSG5SiteDocuments1SGSW1PCS2GSGSNSW/Documents2SG005012PCSSGSNSG5SW(80ksub)2SG500581PCSSGSNSG5NED1CD诺基亚SGSN–主要性能•大容量1,000,000附着用户1,000,000激活用户960,000激活PDP500Mbps吞吐量/2G网络1Gbps吞吐量/3G网络•外部接口3072条64kbps帧中继连接18个以太网接口128条64kbps七号信令链路240个E1接口•运营商级的高可靠性•支持GboverIP，满足未来发展需要•物理性能占地面积：3.36平方米（含运维空间）满配功耗：3.2KW9©NOKIA2GSGSNReliability:5Nines12Months0.999900.999910.999920.999930.999940.999950.999960.999970.999980.999991.00000Sep-04Oct-04Nov-04Dec-04Jan-05Feb-05Mar-05Apr-05May-05Jun-05Jul-05Aug-055Nines12months0.99999530.99999530.99999530.99999690.99999690.99999690.99999650.99999650.99999640.99999790.99999950.9999995Observationline0.999990.999990.999990.999990.999990.999990.999990.999990.999990.999990.999990.99999Sep-04Oct-04Nov-04Dec-04Jan-05Feb-05Mar-05Apr-05May-05Jun-05Jul-05Aug-05诺基亚SGSN－硬件体系结构SGACSGBCCLSUPAPU1PAPU2PAPU9PAPU10GSW0GSW1PAPU3PAPU4MCHU0MCHU1PAPU0ET0(32*ET2E/A)0123456789SDMCHU0SDMCHU1PDFU0PDFU1SDOMU0SDOMU1OMU1OMU0PAPU11PAPU12ET1(28*ET2E/A)PDFU0PDFU1CLBU1PAPU6PAPU7PAPU5PAPU16SMMU0SMMU1SMMU2SMMU3SMMU4PAPU8PAPU13PAPU14PAPU1510CLBU0DX200平台主要功能模块PAPU:数据处理单元共16+1个，每个可处理60000个PDP连接与100000个激活用户SMMU:信令及移动性管理单元共4+1个，每个可处理250000个激活用户MCHU:标记及计费处理单元,2nOMU:操作维护单元,2nCLBU:时钟及告警缓存单元,2nGSW:交换矩阵,2n诺基亚SGSN逻辑结构MessageBusETGSWSMMU(4+1)MCHU(2N)OMU(2N)BSS,HLR,MSC/VLR(E1/T1)RAN(U-plane)HLR,MSC/VLR(SS#7/IP)CGBSS(Gb/IP)PAPU(16+1)IOCP-EA(16+1)RAN(SS#7/IP)GGSN(C/U-plane)MCHU-Markerandcharging(1/2)DOCUMENTTYPETypeUnitOrDepartmentHereTypeYourNameHereTypeDateHere-slot1:PSC6Powersupply-slot2:AS7-A/B-slot3:AC25-AAnalogX.25Interface-slot4:SWCOPSwitchControlProcessor-slot5:MBIF0MessageBusInterface-slot6:MBIF1MessageBusInterface-slot7:CPUCentralProcessingUnitCPUMBIF11234567MBIF0SWCOPAC25AS7DigitalX.25InterfaceCC4C-APSC6DOCUMENTTYPETypeUnitOrDepartmentHereTypeYourNameHereTypeDateHereSGACSGBCCLSUPAPU1PAPU2PAPU9PAPU10GSW0GSW1PAPU3PAPU4MCHU0MCHU1PAPU0ET0(32*ET2E/A)0123456789SDMCHU0SDMCHU1PDFU0PDFU1SDOMU0SDOMU1OMU1OMU0PAPU11PAPU12ET1(28*ET2E/A)PDFU0PDFU1CLBU1PAPU6PAPU7PAPU5PAPU16SMMU0SMMU1SMMU2SMMU3SMMU4PAPU8PAPU13PAPU14PAPU1510CLBU0•MCHU包含两个功能，计费功能与标记功能•计费功能用于收集与储存来自于PAPUs与SMMUs的计费数据，生成CDRs并且通过Ga接口传输到计费网关•收集与储存全系统的统计数据•当使用X.25连接到网管系统时，负责将统计与告警数据发送到网网管系统MCHU-Markerandcharging(2/2)DOCUMENTTYPETypeUnitOrDepartmentHereTypeYourNameHereTypeDateHere-slot1:PSC6Powersupply-slot2:AS7-A/B-slot3:AC25-A/AS7-AAnalog/DigitalX.25Interface-slot4:SWCOPSwitchControlProcessor-slot5:MBIF0MessageBusInterface-slot6:MBIF1MessageBusInterface-slot7:CPUCentralProcessingUnitCPUMBIF11234567MBIF0SWCOPAC25AS7DigitalX.25InterfaceCC4C-APSC6•标记功能用于控制交换矩阵并且建立与释放所有连接，同时维护所有的通过交换矩阵的半永久连接•MCHU也用于为SMMU存储用户数据•为SGSN管理的用户分配PTMSI(Packet-TMSI)•每一个MCHU均包含一个本地存储设备(HardDiskdrive,HDU)与一个磁盘模块(cartridgetapeunit,CTU)SMMU-SignallingandMobilityManagementUnit(1/3)DOCUMENTTYPETypeUnitOrDepartmentHereTypeYourNameHereTypeDateHereSGACSGBCCLSUPAPU1PAPU2PAPU9PAPU10GSW0GSW1PAPU3PAPU4MCHU0MCHU1PAPU0ET0(32*ET2E/A)0123456789SDMCHU0SDMCHU1PDFU0PDFU1SDOMU0SDOMU1OMU1OMU0PAPU11PAPU12ET1(28*ET2E/A)PDFU0PDFU1CLBU1PAPU6PAPU7PAPU5PAPU16SMMU0SMMU1SMMU2SMMU3SMMU4PAPU8PAPU13PAPU14PAPU1510CLBU0•SMMU用于用户移动性管理功能，支持如下接口:•Gr(HLR–SGSN),•Gd(SMS-GMSC–SGSN),•Gs(MSC/VLR–SGSN)•Gf(EIR–SGSN)•SMMU支持MTP,SCCP,TCAP,BSSAP+与MAP2/MAP3DOCUMENTTYPETypeUnitOrDepartmentHereTypeYourNameHereTypeDateHere-slot1:PSC6Powersupply-slot2:-slot3:AS70CCS7InterfaceUnit-slot4:AS71CCS7InterfaceUnit-slot5:MBIF0MessageBusInterface-slot6:MBIF1MessageBusInterface-slot7:CPUCentralProcessingUnitCPUMBIF11234567MBIF0AS71AS70CC4C-APSC6•SMMU管理GPRS访问用户数据库(GSBASE)，同时管理移动性管理相关的七号信令链路。•当使用Gs接口时，SMMU用于控制所有PS/CS联合移动性管理•SMMU用于支持用户鉴权•SMMU用于设备鉴权并且存储最近的终端IMEI号•SMMU用于支持PS域的短信收发SMMU-SignallingandMobilityManagementUnit(2/3)DOCUMENTTYPETypeUnitOrDepartmentHereTypeYourNameHereTypeDateHere-slot1:PSC6Powersupply-slot2:-slot3:AS70CCS7InterfaceUnit-slot4:AS71CCS7InterfaceUnit-slot5:MBIF0MessageBusInterface-slot6:MBIF1MessageBusInterface-slot7:CPUCentralProcessingUnitCPUMBIF11234567MBIF0AS71AS70CC4C-APSC6•SMMU可支持34条七号信令链路•使用N+1冗余备份•一个SGSN最多包括5个SMMU（4＋1）SMMU-SignallingandMobilityManagementUnit(3/3)PacketProcessingUnit-PAPU(1/2)DOCUMENTTYPETypeUnitOrDepartmentHereTypeYourNameHereType