WCDMA软交换核心网络介绍_图文

1、WCDMA 软交换核心网络介绍 前言l WCDMA版本从R99演进到R4之后网络中会增加什么样的功能实体请看本课程23 课程目标l 了解R4中新增的功能实体的功能以 及新增的协议接口l 了解R4 中典型的呼叫流程 您将能够课程内容从R99到R445SS7网AUC VLRPSTN/ISDN IP 网BSS UTRAN VLR TDM ATMSignalingWAP 网关E1/STM-1E1/STM-1E1/STM-1E1/STM-1E1/STM-1E1/STM-1/STM-4E1E1E1GMSC VMSC VMSCGMLCHLR SCP SGSN 3G R99协议组网3G R4 协议组网 SMS

2、-C SCP MAP CAP MAP MAP GMLC/SMLC HLR/EIR SS7网 SIGTRAN GMSC server BICC MAP H.248 VMSC Server RANAP PSTN / ISDN TDM/G.711 UTRAN BSSAP AAL2 MGW MGW TDM/G.711 GSM / R99 PLMN BSS TDM RTP(AAL2/AMR IP (ATM BackBone IP 网络 6 3GR5 体系结构 Alternative Access Network Applications & Services * SCP R-SGW GGSN O

3、ther PLMN SGSN CAP Gn Gp TE R MT Um ERAN CSCF Legacy mobile signaling Network Mh HSS * Gr EIR Gf SGSN Gn Iu 1 MGW Iu 2 Nb Mc MSC server Gc Gi Cx Ms CSCF Mw Mm Multimedia IP Networks THIS IS MRF Gi T-SGW * Mr MRF Gi GGSN Mg MGCF Mc Gi MGW Mc Iu-ps' Iu TE R 1 MT Uu UTRAN PSTN/ Legacy/External Iu =

4、 Iucs (RTP, AAL2 Iu 2 Nc = Iu (RANAP GMSC server MAP T-SGW * MAP Applications & Services * HSS * Mh R-SGW * * those elements are duplicated for figure layout purpose only, they belong to the same logical element in the reference model Signalling Interface Signalling and Data Transfer Interface 7

5、 R99 R4 R 4 核心网络结构 SCP CAP Over TDM TUP/ISUP TDM HLR MAP Over TDM SCP CAP Over TDM/IP HLR MAP Over TDM/IP MSC MSC MSC Server H.248 TUP/ISUP/BICC MSC Server H.248 C S-M G W TDM/ATM/IP C S-M G W RAN RAN RAN RAN RAN RAN R99 注 R99与R4的分组域无变化 R4 图中未画出 8 R4 本地网组网模式 MSC Server GMSC Server BICC M3UA/SCTP H.2

6、48 H.248 RANAP SG ISUP IP Backbone MG MGW STP MGW UTRAN MGW UTRAN PSTN 9 R4 分组长途网 TMSC Server BICC TMSC Server MSC Server MSC Server IP Backbone H.248 RANAP H.248 RANAP 本地网 1 MGW 本地网 N UTRAN MGW UTRAN 10 R4信令网u MSCSERVER和MGW之间的H.248信令使用IP传输u其他信令MAP可重用SS7信令网与SCP SG有内置和独立两种方式独立S G使用M3U A/S T C P/I P11

7、12R4 R4 增强功能TrFOu TFO 与TrFO 的区别F TFO通过带内信令建立免编解码器的连接用于监视TFO消息中的信令建立后完全不需要编解码器每经过一次编解码会降低话音质量è能减少话音的传输时延F 节省网络设备功率è采用TFO/TrFO时节省网络设备功率新的业务生成机制是3G R4网络的特色n3G网络定义的是业务能力SCP除提供传统智能业务以外还提供OSA开放业务接口供第三方定制和开发各种新业务SCP1314ATM/IP coreAPP Server SCP Soft Switch GSM/WCDMA switchSTPMGW PSTN MGW业务管理业务控制核

8、心交换边缘接入向NGN 演进u灵活的组网方式 可与城域网进行融合可扩展性承载面CS-MGW可分别扩展u u可管理性承载 面CS-MGW分散设置在边缘城市R4控制与承载相分分离15R4 IP 承载分析 uIP 分组统计复用的优势 è分组承载网络 音服务质量 减少语音编解码的次数 提高了语 节省了建网成本 è网络带宽的高效利用 è网络配置 扩容和维护简单 可大幅降低运营成本 减少建设投入 è骨干网和数据网络可以共享 è实现多网融合 提供综合业务 16 3GR4 设备优势分析 大容量 务 高处理能力 n业务个性化多样化和开放的业务平台将产生越来越多的

9、业 也对设备提出了更高处理能力需求 提出了大容 n分级化建设和组网使得设备越来越集中设置 量建设的需求 n核心网络分组化使信令传输和内部交换带宽得到了质的提 高 n控制和承载分离和网络构件化 使得各个业务实体分工明 17 确并且可以分别针对不同的技术方向发展 双归属 R DUAL HOMING OSA iManager 3rd party . SCP LCS Soft Switch 1 Soft Switch 2 SoftSwitch Legacy GSM/GPRS IP Backbone Radio Access Network ar ul BSS l l / Ce NS R MGW Net

10、Engine MGW PSTN/ISDN Signalling Channel for Soft Switch 1 Signalling Channel for Soft Switch 2 Bearer Channel Heart beat Network management center 18 本章小结 l 本章主要介绍了从R99演进到R4 R5后 新增的各类功能 实体 以及R4/R5的优势 19 3G R4 MSC SREVER功能n继承了R99MSC的所有电路域控制面功能由MGW以多种承载方式实现n集成了R99VLR功能n对电路域基本业务及补充业务涉及的MGW中承载终端及媒体流的控制n

11、 与其他MSCserver间通过BICC信令实现承载无关的局间呼叫控制并可要求MGW主动上报其终端特性21n由GMSC的呼叫控制和移动控制组成n具有查询位置信息的功能网络如不能查询该用户所属的HLR然后将呼叫转接到目前登记的MSCserver中n 支持BICC与ISUP的协议互通223GR4 MGW功能n MGW是3GR4核心网的用户承载面的网关交换设备UTRAN/BSS PSTN/ISDN是Iu接口以及分组网媒体流的终结点n MGW可以支持媒体转换如GSM/UMTS各类语音编解码器IWF会议桥n MGW可通过H.248信令n 支持电路域业务在多种传输媒介或基于RTP/UDP/IP上的实现23

12、3GR4 SG功能n 信令网关在基于TDM的窄带SS7信令网络与基于IP 的宽带信令网络之间n SGW在物理实现上可与(GMSCserver或MGW合一24本章小结l本章对R4中的新增组件的功能进行了介绍25课程内容从R99到R426n(GMSCserver与MGW间的标准接口 及针对3GPP特殊需求的H.248扩展事务及包定义IP/ATM/TDM 包括终端属性底层传输机制将 采用MTP3B 或SCTP为其提供协议承载27终端1RTP业务流 *终端2TDM信道终端3TDM信道终端4上下文1TDM信道*终端5TDM信道上下文2媒体网关28H.248协议基本概念n在R4网络连接模型中主要通过“上下

13、文”和“终端”2个抽象概念来描述一个终端由一系列特征属性来描述每个终端都拥有一个唯一的标识符(TerminationID具有紧密关联的终端属性被封装在“描述符”内n上下文(Context:一个上下文是一组终端的关联的抽象则该上下文描述了终端间的拓扑关系29呼叫控制接口(Nc接口n(GMSCserver间的标准接口为UMTS/GSM 的窄带电路域业务提供独立于用户面承载技术及控制面信令传输技术的局间呼叫控制能力n BICC新增的“应用信息传输”»úÖÆʹµÃNc½Ó¿Ú

14、93;½¶ËµÄºô½Ð¿ØÖƽڵã¼ä¿ÉÒԽн»»¥³ÐÔØÏà¹ØµÄÐÅÏ¢Á¬½Ó²Î

15、91;¼Array³ÐÔؽ¨Á¢·½Ê½¼°Ö§³ÖµÄCodecÁбíµÈ30n前向承载建立方式下 Setup在发起承载Setup前n后向承载建立方式下 Setup后继局发起后向承载Setup的依据是前向IAM消息中携带的承载地址与标识信息前向承载与后向承载建立31n MGW间的Nb接口用来在R4核心网内承载用户业务流释放

16、与维护IP或TDM作为物理承载方式AAL2SAR-传输网络用户面业务流的协议栈为n对于IP承载承载控制信令的协议栈为Q.1970/SCTP/IPn Nb UP协议在承载面MGW间提供业务数据流的组帧速率匹配及定时控制等功能支持压缩语音32物理承载协议类型IP ATM TDMIu接口RANAP SCCP/MTP3B/SSCF-NNI/SSCOP/AAL5/ATM-SSCF-NNI/SSCOP/AAL5/ATMMTP3/MTP2/MTP15/ATM-C/D/E/F/G接口MAP TCAP/SCCP/M3UA/SCTP/IP-TCAP/SCCP/MTP3/MTP2/MTP1CAP TCAP/SCCP

17、/M3UA/SCTP/IP -TCAP/SCCP/MTP3/MTP2/MTP1R4主要信令接口承载及协议栈33本章小结l本章对R4中出现的新协议接口功能进行了介绍34课程内容从R99到R43536BSC-ORNC-OHLR-OMSC SERVER-OMGW-OMGW-GRANAPMAPBICCBSSAP H.248AAL2TDMRTP(AAL2/AMR IP (ATM BackBoneGMSC SERVERMGW-TBSC-TRNC-TRTP(AAL2/AMRIP (ATM BackBoneRANAPTDMBSSAPAAL2MAP运营商A运营商B假定一个移动用户O从运营商A的网络呼叫移动用户T

18、其中RNC-O MSCSERVER-O 对应RNC-T等其它设备为运营商B的网络设备R4呼叫流程举例37MS-ORNC/BSC-OMSC server-OMGW-O GMSC server.CM_Service_Req(Initial UEIMSI/TMSI,CM_Serv_TypeAuth_Req(DTAuth_Rsp(DTCKSN,RAND,AUTN/CKSN,RANDRES/SRESSecurity_Mode_Control / Cipher_Mode_SettingIK,EK,IPA,EA/Kc,CipherModeSecurity_Mode_Complete / Cipher_Mod

19、e_Complete Chosen IPA,EA/Chosen,CipherModeSetup(DTCalled Party BCD,Supported Codecs,PLMN_BC, Facility,LLC,HLCCall Proceeding(DTPLMN_BC,Progress_Ind,FacilityQuery VLR For Access Data Query VLR For Subscription Check38MSC server-OMGW-OGMSC server.Number and Route Analysis => Addr of GMSC (DPC or IP

20、IAMCIC,Called Address = Called MSISDN,Calling Address,Continuity,USI BICC_DataAction Indicatior=Forward,BNC Char, Bearer Tunnel Infor,HLRNumber Analysis => MSISDN.MSC server-TMAP_SRI_ReqMAP_PRN_ReqMAP_PRN_RspMSISDN,ISDN_BCIMSI,GSM_BCMSRNMSRNMAP_SRI_Rsp MGW selection andIncoming Side Bearer Estb m

21、aybe here39GMSC server .MSC server-TNumber and Route Analysis=> Addr of MSC-TMGW-TRNC/BSC-TMS_TIAM CIC,Called Address = MSRN, Calling Address,Continuity,USIBICC_DataAction Indicatior=Forward,BNC Char, Bearer Tunnel InfoNumber Analysis =>Local MSRN Query VLR =>IMSI/TMSI Page_Req IMSI/TMSIPag

22、e_Rsp CM_ServType,IMSISubscription CheckPage Chan ReqImm assgn Page resp40Auth_Req(DTAuth_Rsp(DTCKSN,RAND,AUTN/CKSN,RANDRES/SRESSecurity_Mode_Control / Cipher_Mode_SettingIK,EK,IPA,EA/Kc,CipherModeSecurity_Mode_Complete / Cipher_Mode_Complete Chosen IPA,EA/Chosen,CipherModeGMSC serverMSC sever-TRNC/

23、BSC-TMS_TMGW-TCalled Party BCD, Codecs,PLMN_BC, Facility,LLC,HLC,Calling Party BCDSetup (DTCall Confirm (DTPLMN_BC,Facility,Supported CodecsMGW selection.Query VLR For Access Data41TerminationID = ?,ContextID=?, BNC-id = ?,BIWF_Addr=?, BC_Char/Codec, BNC_Char ,NotifyRequested, UPmode, UPVersion, Int

24、erface = Nb,InitDirect =Incoming,Cut_Through_Direction = Both (Codec selected when TrFOGMSC server MSC sever-T RNC/BSC-T MS-TMGW-T ADD.req ADD.rspTerminationID = T1,ContextID=C1,BNC-ID = bearer1,BIWF_Addr = MGW-TAPM BICC_Data(BNC-ID = bearer1,BIWF_Addr = MGW-T Prepare Bearer MGW-G ADD.req Terminatio

25、nID = ?,ContextID=?, BNC-id = bearer1 ,BIWF_Addr=MGW-T , BC_Char/Codec, BNC_Char ,NotifyRequested, UPmode, UPVersion, Interface = Nb,InitDirect =Incoming,Cut_Through_Direction = BothMGW selection .Establish Bearer (Outcoming Side(Network Side 42GMSC server MSC sever-TRNC/BSC-T MS-TMGW-T MGW-G ADD.rs

26、p.TerminationID = T2,ContextID=C2ERQ(Q.2630 for AAL2 /Request(Q.1970 for RTPECF(Q.2630 for AAL2 /Accepted(Q.1970 for RTPADD.req TerminationID = ?,ContextID=C2, BNC-id = ?,BIWF_Addr=?,BC_Char/ Codec, BNC_Char ,NotifyRequested, UPmode, UPVersion, Interface = Nb,InitDirect =Incoming,Cut_Through_Directi

27、on = Both (Codec recieved when TrFOADD.rspTerminationID = T3,BNC-ID = bearer3,BIWF_Addr = MGW-GPrepare Bearer(Incoming Side43GMSC server .MS-O RNC/BSC-O MSC server-O MGW-O APMBICC_Data(BNC-ID = bearer3,BIWF_Addr = MGW-G MGW-GADD.req TerminationID = ?,ContextID=?, BNC-id = bearer3 ,BIWF_Addr=MGW-G ,

28、BNC_Char ,Codec= Selected Codec/BC_Char = Derive from ISDN_BC, NotifyRequested, UPmode=SMpSDU, UPVersion = 0x01, Interface = Nb,InitDirect =Outcoming, Cut_Through_Direction = BothADD.rsp TerminationID = T4,ContextID=C3Establish Bearer MGW selection(Network Side 44GMSC server .MS-O RNC-OMGW-O MGW-G(A

29、ccess Side ADD.req TerminationID = ?, ContextID=C3, BNC-id = ?,BIWF_Addr=?, BNC_Char ,NotifyNotRequested,UPmode, UPVersion, Interface = Iu, InitDirect =Incoming,Cut_Through_Direction = Forward (SendOnly,BC_Char = Derived from BC or Codec infor from Setup (speech/Codec = Selected Codec (TrFO,PLMN_BC

30、= BC infor from Setup (Circuit Data ADD.rspTerminationID = T5,BNC-ID = bearer4,BIWF_Addr = MGW-O RAB ASSIGNMENT REQRAB-ID = RAB1, RAB Param ( Traffic Class,MBR,GBR,DeliveryOrder, MaxSDUSize,SDU Format,SDU RBER etc. UPMode = SMpSDU, UPversion,TLR = MGW-O , BindingID = bearer4TCh Assignment TCh Assign

31、ment CompletePrepare Bearer45GMSC server .MS-O RNC-O MSC server-O MGW-O MGW-GERQ(Q.2630 for AAL2 ECF(Q.2630 for AAL2 RAB ASSIGNMENT COMPLIuUP-InitRFCI, SubFlowSizeInfo, IPTI, etcIuUP-Init AckRFCI, SubFlowSizeInfo, IPTI, etcIu/Nb UP-InitIu/Nb UP-Init Continuity46GMSC server .MS-O BSC-O MSC server-OMG

32、W-O MGW-G (Access Side ADD.req TerminationID =T5 (TrunckNumber , ContextID=C3,NotifyNotRequested, Cut_Through_Direction = Forward (SendOnly,BS_Char = Derived from BC infor from Setup (speech ,PLMN_BC = BC infor from Setup, (Circuit Data,GSM channel Coding = Derived from BC infor from Setup ADD.rspAS

33、SIGNMENT REQTCh Assignment TCh Assignment Complete Reserve Circuit A i/f Circuit SelectTDM seizure ASSIGNMENT COMPL CICContinuityGSM 的移动呼叫移动847MGW-O MGW-G MSC server-T MGW-T GMSC serverMSC server-O .RFCI, SubFlowSizeInfo, IPTI, etcIu/Nb UP-InitIu/Nb UP-InitNotify.reqTerminationID =T3,ObservedEvent=

34、Bearer ConnectedNotify.rspIu/Nb UP-InitRFCI, SubFlowSizeInfo, IPTI, etcIu/Nb UP-InitNotify.reqTerminationID =T1,ObservedEvent= Bearer ConnectedNotify.rspContinuity Continuity .移动呼叫移动948GMSC server MSC sever-T RNC-T MS-TMGW-T ADD.req ADD.rspTerminationID = T6, ContextID=C1,BNC-ID = bearer5, BIWF_Addr = MGW-TPrepare Bearer MGW-G . TerminationID = ?, ContextID=C3