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1、MSS网络的相关介绍,马永君,内容,MSS分成结构的简单介绍 功能单元的简单介绍 相关硬件的简单介绍 相关软件的简单介绍 MSS分层结构信令介绍 话务流程,Today)GSM with TDM Backbone,BTS,BTS,BTS,BSC,MSC/VLR,BSC,BTS,BTS,BSC,MSC/VLR,BSC,TDM Transport,WCDMA coverage,GSM coverage,BTS,BTS,BTS,TSC,TSC,PLMN/PSTN/ISDN,PLMN/PSTN/ISDN,Target Network,MGw,Packet Multi-Service Backbone,M
2、Gw,MGw,MGw,MGw,MGw,MGw,MGw,MGw,MGw,MGw,MGw,MGw,Full network resilience through MSC Pool and Mobile Softswitch Solution.,MSC Servers,centralized and grouped in Pools(redundancy).,Bandwidth efficiency and optimal speech quality through TrFO/TFO(R12)and AMR-WB(R13).,Packet data transport for both signa
3、lling and user plane.,Complimented with IMS to enable combinational multimedia services.,Media Gateways,distributed and grouped(redundancy).,连接层,MGW,MGW,User data,Control,PSTN/ISDN,InternetIntranets,WCDMA,EDGE,GSM,未来新的分层网络结构,业务/应用层,SGW,控制层,HLR/AUC/FNR,GMSC/Transit,应用服务器,业务能力服务器,MSC服务器,SGSN服务器,服务器,应用
4、服务器,The Core Network,User data,Application,Service Enablers,ControlLayer,HLR/AuC/FNR,SGW,ConnectivityLayer,MGW,MGWGGSN,Services/ApplicationLayer,Control,Servers,Application,Servers,PSTN/ISDN,InternetIntranets,WCDMA,EDGE,GSM,分层结构的优点,开放而通用的结构满足当前和未来市场的需求 层间的独立性使得每一层能够独立地在各自的技术领域中向前发展和演进适应业务模型增长与变化的灵活性
5、 为网络向全IP解决方案演进奠定基础,连接层,MGW,MGW,用户数据,控制,PSTN/ISDN,InternetIntranets,WCDMA,EDGE,GSM,连接层,业务/应用层,SGW,控制层,HLR/AUC/FNR,GMSC/Transit,应用服务器,业务能力服务器,MSC服务器,SGSN服务器,服务器,应用服务器,用户数据,应用服务器,业务能力服务器,MSC服务器,SGSN服务器,HLR/AUC/FNR,GMSC/Transit,SGW,MGW,MGW,服务器,PSTN/ISDN,InternetIntranets,WCDMA,EDGE,GSM,控制层,连接层,信令,业务/应用层
6、,控制层,应用服务器,内容,MSS分成结构的简单介绍 功能单元的简单介绍 相关硬件的简单介绍 相关软件的简单介绍 MSS分层结构信令介绍 话务流程,Ericsson GSM system Model,功能单元,Mobile services Switching Center(MSC)The Gateway MSC(GMSC)Home Location Register(HLR)Visitor Location Register(VLR)AUthentication Center(AUC)Equipment Identity Register(EIR)Base Station Controlle
7、r(BSC)Radio Base Station(RBS)Mobile Station(MS)CELLLocation Area(LA)MSC Service Area,Mobile services Switching Center(MSC),The Mobile services Switching Center(MSC)performs thesystem telephony switching functions.It also controls calls toand from other telephony and data systems,such as the Public S
8、witched Telephone Network(PSTN)and Public Land Mobile Network(PLMN).,Mobile Switching Subsystem(MSS)Mobile Mobility and radio Subsystem(MMS)Mobile Data Subsystem(MDS)SHort message service Subsystem(SHS),Mobile Switching Subsystem(MSS),In the MSC/VLR server this involves functions for setting up and
9、controlling calls to and from mobile subscribers,functions for supplementary service interactions,functions for call independent supplementary service procedures.In the GMSC server this involves interrogation for routing data towards HLR,functions for setting up and controlling calls to mobile subsc
10、ribers.In SMS-GMSC this involves telecommunication service analysis.In SMS-IWMSC this involves telecommunication service analysis.,Mobile Mobility and radio Subsystem(MMS),The following main functions are implemented in MMS in the MSC/VLR server:Mobility management functions Handover/relocation func
11、tions Base Station Controller(BSC)functions Radio network data Functions for signalling to or from the mobile station(using BSSAP)and between other system entities(using MAP and BSSAP+)Functions for signalling to or from RNC(using RANAP),Mobile Data Subsystem(MDS),In MSC/VLR Server this involves:fun
12、ctions for updating of the mobile subscribers location(location updating/location cancellation)in the different location registers functions for updating the mobile subscriber data administrative functions for defining and handling of subscriber data and handling of the mobile subscribers functions
13、for handling of the own calling address functions for handling of the IMSI number series analysis data functions for MAP-operations functions for handling of the Security Related Data functions for MSC Pool functions for routing of USSD requests to/from external node,SHort message service Subsystem(
14、SHS),In MSC/VLR Server this involves:Functions for reception of a short message from the MS,unpacking and analysis of the messages related to short message service and forwarding the short message to the SMS-IWMSC.Functions for reception of a short message from the SMS-GMSC,packing of the short mess
15、age and forwarding the short message to the MS.A function used to notify the HLR that the MS is able to receive a short message due to that the MS is reachable again or has now memory available.A function used to trigger High Penetration Notification(HPN)when a mobile terminated short messages could
16、 not be delivered to the MS.,SHort message service Subsystem(SHS),A function used to queue a terminated short message in the MSC/VLR Server in case of a temporary busy situation.A function used to trigger IN-services in order to charge and handle properly Mobile Originated Short Message Transfer als
17、o in case the subscriber is roaming outside his Home Network(MO-SMS-CSI Camel Ph3).A function used to trigger IN-services in order to charge and handle properly Mobile Terminated Short Message Transfer in case the subscriber is roaming outside his Home Network(MT-SMS-CSI Camel Ph4).A function used t
18、o trigger RTCfA-service in order to charge and handle properly Mobile Originated/Terminated Short Message Transfer in case the subscriber is in his Home Network.A function used to route the MO-SMS towards a new destination instead of the service centre SC-address configured in the MS.,The Gateway MS
19、C(GMSC),The GMSC contains the interrogation facility.That is,theGMSC contains signaling functions for retrieving informationfrom the concerned HLR which tells how to proceed with callset-up.Depending on the interrogation result,the call is eitherre-routed by GMSC to the MSC where the mobile subscrib
20、er islocated or forwarded according to the forward-to number.Charging and accounting functions are also implemented in theGMSC.,Home Location Register(HLR),TheHLR is a centralized network database that stores andmanages all mobile subscriptions belonging to a specificoperator.It acts as a permanent
21、store for a persons subscriptioninformation until that subscription is canceled.The informationstored includes:Subscriber identity Subscriber supplementary services Subscriber location information Subscriber authentication information,Visitor Location Register(VLR),The VLR database contains informat
22、ion about all the mobilesubscribers currently located in an MSC service area.Thus,there is one VLR for each MSC in a network.The VLRtemporarily stores subscription information so that the MSC canservice all the subscribers currently visiting that MSC servicearea.The VLR can be regarded as a distribu
23、ted HLR as it holdsa copy of the HLR information stored about the subscriber.When a subscriber roams into a new MSC service area,the VLRconnected to that MSC requests information about thesubscriber from the subscribers HLR.The HLR sends a copy ofthe information to the VLR and updates its own locati
24、oninformation.When the subscriber makes a call,the VLR willalready have the information required for call set-up.,AUthentication Center(AUC),The AUthentication Center(AUC)is a data base which storesthe following data:a RANDom number(RAND)a Signed RESponse(SRES)a Ciphering Key(Kc)These three pieces o
25、f data are called triplets.The AUC generates and provides one,or several triplets for a certain IMSI at each request from the HLR.The HLR forwards the provided triplets to the serving VLR.At any MS access attempt,the MSC may send RAND to the MS to authenticate the subscribers SIM.The,SRES returned b
26、y the MS is then compared to the SRES provided by the AUC(via HLR)to the VLR.The MSC may also facilitate ciphering on the radio path by providing the TRX managing the traffic with the Kc.Successful ciphering is possible only if the Kc,which is calculated by the MS during theauthentication procedure,
27、is identical to the one provided to the TRX.The AUC can be implemented as an Application Module in the MSC/VLR.,Equipment Identity Register(EIR),The Equipment Identity Register(EIR)is a data base whichstores the International Mobile station Equipment Identity(IMEI)for each MS equipment.Each IMEI is
28、unique.Duringany MS access(except in the case of IMSI-detach),theMSC/VLR may verify the IMEI.When necessary,the EIR isrequested by the MSC/VLR to check the IMEI.The mainobjective is to ensure that the equipment is not stolen or faulty.Equipment can be classified as:white listed(permitted for use)gra
29、y listed(should be tracked for evaluation)black listed(barred)unknown equipmentThe network rejects any access attempt if the equipment isclassified as“black-listed”or“unknown”.,Base Station Controller(BSC),Base Station Controller(BSC),administration of resources in BSS supervision of BTS connection
30、handling of mobile stations locating and handover administration of paging transmission network management operation and maintenance of BSS,Radio Base Station(RBS),RBS 2000,TRU1,TRU2,TRU3,TRU4,TRU5,TRU6,CDU1,CDU2,CDU3,DXU,PowerSupply,Radio Base Station(RBS),radio transmission,including frequency hop
31、ping radio signal reception from MSs,including equalizing and diversity functions to compensate for fading effects quality measurements:RBS measures signal strength and quality on the uplink.MS measures signal strength and quality on the downlink as well as signal strength on neighboring RBSs.The re
32、sults are sent to the RBS.The RBS adds its measurements and reports to the BSC time alignment measurements transceiver and MS power control multiplexing on the radio path,channel coding,interleaving,and ciphering broadcasting system information and paging messages receiving channel requests from MSs
33、,Mobile Station(MS),GSM MSs consist of:A mobile terminal A Subscriber Identity Module(SIM),CELL,A cell is the basic unit of a cellular system and is defined as the area of radio coverage given by one BS antenna system.Each cell is assigned a unique number called Cell Global Identity(CGI).In a comple
34、te network covering an entire country,the number of cells can be quite high.,Location Area(LA),A Location Area(LA)is defined as a group of cells.Within the network,a subscribers location is known by the LA which they are in.The identity of the LA in which an MS is currently located is stored in the
35、VLR.When an MS crosses a boundary from a cell belonging to one LA into a cell belonging to another LA,it must report its new location to the network1.When an MS crosses a cell boundary within an LA,it does need to report its new location to the network.When there is call for an MS,a paging message i
36、s broadcast within all cells belonging to an LA.,MSC Service Area,An MSC service area is made up of a number of LAs and represents the geographical part of the network controlled by one MSC.In order to be able to route a call to an MS,the subscribers MSC service area is also recorded and monitored.T
37、he subscribers MSC service area is stored in the HLR.,Location Area（不同MSC位置更新）,Location Area(同一MSC内位置更新),内容,MSS分成结构的简单介绍 功能单元的简单介绍 相关硬件的简单介绍 相关软件的简单介绍 MSS分层结构信令介绍 话务流程,MSC Server Hardware Platform,To support TDM signalling,APZ 212 50 Next step High Capacity CP,Real time performance:2 times APZ 212 4
38、0 Based on a Intel Itanium CPUUsing LinuxMemory up to 20 GW(PS,RS,DS,OS):3 times APZ 212 40Ethernet connections for connecting Ethernet RPs and I/O systemSource code(PLEX and ASA)compatibilityRetained APZ functionality,APZ 212 50 Cabinet,Equipment practice BYB 5012 CPSB on two shelves2 CPAM(CP Auxil
39、iary Magazine)Communication between the CP sidesRP bus and IO interfaceAPG40 and additional GEM magazine available on the back sideFootprint:600 x 800 mmHeight:1800 mmPower:Max 1660 W(excl.APG),APZ 212 50 Cabinet Layout,The CP Server Block(CPSB),Based on HP(Hewlett-Packard)Integrity cx2620 Carrier G
40、rade Server,Rear View,Front view,CP Auxiliary Magazine(CPAM),CPHU CP Handler UnitCPSB interface board(PCIH)RPH Magazine interface board(RPHMI)Update Bus board(UPBB3)Power board(POU-C)RPHU RP Handler UnitRPH interface board(RPIO2)Serial RP Bus Interface boards(RPBIS)RPH power board(POU-R),Compatibili
41、ty of APZ 212 50,New CP hardwareMainly CPS,MAS,PES and CPHW software are modifiedOther APZ subsystems are reusedOnly APG40 is supported as I/O systemOnly Ethernet RP bus(RPB-E)&Serial RP bus(RPB-S)is supported in APZ 212 50Code compatible for APT,APZ 212 50 Product Highlight,APZ 212 50 combines the
42、Intel Itanium and HP Carrier Grade Server running on Linux,integrated with the Ericsson Telecom Grade functionality giving a future proof platform for Multi-pro systems.Real time performance:2 times APZ 212 40 Memory up to 20 GW(PS,RS,DS,OS):3 times APZ 212 40RPB-E for connecting Ethernet RPs and I/
43、O systemSource code(PLEX and ASA)compatibilityRetained APZ functionality,APT Magazine,GEMNew magazine in AXE810 with 26 slots totallyUp to 22 device boards freely mixed in the GEMGDMFull-height and half-height,Signalling Terminals,SIGTRAN Line Interface(SLI)The SCTP/IP signalling terminal provides I
44、P signalling interfaceBased on GARP.Two GARP boards form a redundant SLI pairsGARP has two Fast Ethernet port on backplane for RP-RP communication and one on front panel for network connectionConnected to CP via RPB-S or RPB-EATM Link Interface(ALI)The SAAL signalling terminal provides ATM signallin
45、g interfaceALI(GDM based)or ALI-E(GEM based)boardALI/ALI-E has one optical STM-1 ATM interface on VC-4Connected to CP via RPB-SDL3(ALI)or DL34(ALI-E)interface to Group Switch(used or not depending on the configuration parameter),Signalling Terminals,Standard C7 signalling terminalRPG2/RPG3 for narro
46、wband signalling linkRPP for High speed Signalling Link(HSL)Carried over E1 or over STM-1GCP encoding/decodingRPPGARP,Group Switch and Clock Module,New Group Switch(GS890)16 KMUP on each XDB boardDistributed in different GEMsStrictly no congestionMaximum 512 KMUP for normal rate(64kb/s)switchMaximum
47、 128 KMUP for sub-rate switchNew Clock Module(CL890)Only two CLMs in AXE810Up to 8 clock references can be connected to the CLMs(6 external clock reference,1 RCM and 1 CBC/GSC)Three configurations depending on different target GS size(16 KMUP,128 KMUP and 512 KMUP),APZ 212 50 Architecture,内容,MSS分成结构
48、的简单介绍 功能单元的简单介绍 相关硬件的简单介绍 相关软件的简单介绍 MSS分层结构信令介绍 话务流程,SOFTWARE,CONTROL PLATFORM(APZ),APPLICATION PLATFORM(AP),AM Communication,AM,RESOURCE MODULE PLATFORM(RMP),MAGAM,TRAM,HARDWARE,AXE NODE(AXE 106),APSI,OIP(CB),XSS,MSC/VLR,TRAM,MAGAM,MSC/VLR-Server,RR(MMS),MM(MMS),VLR(MDS),CC(MSS),SS(MSS),SMS(SHS),LC
49、S(LSS),Coordination(TCS),Trunks(TSS),Network mgmt.(OMS,NMS),Charging(CHS),Analysis functions(TCS),RMP(several services,see later slides)APZ(restart,Size alteration,forlopp,AXE parameters,etc),HLR,UE-RBS,Network,OIP,TRAM architecture,内容,MSS分成结构的简单介绍 功能单元的简单介绍 相关硬件的简单介绍 相关软件的简单介绍 MSS分层结构信令介绍 话务流程,Trad
50、itional MSC,标准的分层网络结构及其信令,ITU-T:H.248(GCP,MGW Control)3GPP:Mobile specific packages,HLR,ITU-T:Q.765,BICC Bearer Independent Call Control,TDM,ATM or IP transport,MGW,H.248,IETF:The IP protocol suiteITU-T:The ATM protocol suiteQ。2630,H.248,server,MGW,server,ISUP,MAP,MAP,Site 2,Site 1,Transport Layer,N
