![Internal Use
3
Definition of Core Network
Definition of Core Network
CN includes a series of physical entities to realize user location
management, network function and service control, such as (G)MSC, HLR,
SCP, SMC,GSN etc.
CN can be divided into three types: Home Network Domain, Visit Network
Domain and Transit Network Domain. Ref. is 3GPP 23.101.
User Equipment Domain
Access Network Domain Core Network Domain
Infrastructure Domain
Cu
Mobile
Equipment
Domain
USIM
Domain
Home
Network
Domain
Transit
Network
Domain
Uu Iu
[Zu]
[Yu]
Serving
Network
Domain](https://image.slidesharecdn.com/1-wcdmacorenetworkoverviewissue1-250125104039-6849024b/85/1-WCDMA-Core-Network-Overview-ISSUE1-0-ppt-3-320.jpg)
1-WCDMA Core Network Overview ISSUE1.0.ppt
- 1. Huawei Confidential. All Rights Reserved OWG000001 WCDMA Core Network Overview ISSUE 1.0
- 2. Internal Use 2 Chapter1 Core Network Evolution Chapter2 R99 Core Network Chapter3 R4 Core Network Chapter4 R5 Core Network
- 3. Internal Use 3 Definition of Core Network Definition of Core Network CN includes a series of physical entities to realize user location management, network function and service control, such as (G)MSC, HLR, SCP, SMC,GSN etc. CN can be divided into three types: Home Network Domain, Visit Network Domain and Transit Network Domain. Ref. is 3GPP 23.101. User Equipment Domain Access Network Domain Core Network Domain Infrastructure Domain Cu Mobile Equipment Domain USIM Domain Home Network Domain Transit Network Domain Uu Iu [Zu] [Yu] Serving Network Domain
- 4. Internal Use 4 Release Evolution of WCDMA Release Evolution of WCDMA R4 R5 R99 Inherit all the services and functions of 2G ( GSM and GPRS ) CN is composed of CS domain and PS domain Adopt WCDMA UTRAN Iu interface between RAN and CN is based on ATM Inherit all the services and functions of R99 CS domain change: control is separated from bearer, the function of MSC can be fulfilled by MSC SERVER and MGW. Packet voice supported by CS domain, supporting ATM, IP, TDM bearer Inherit all the services and functions of R4 IM domain is adopted RAN evolved to IP Enhanced IP QoS ability , supporting end to end IP multimedia service 2000 2001 2002 function frozen time
- 5. Internal Use 5 Chapter1 Core Network Evolution Chapter2 R99 Core Network Chapter3 R4 Core Network Chapter4 R5 Core Network
- 6. Internal Use 6 R99 Network Architecture R99 Network Architecture BSS BSC RNS RNC CN Node B Node B A IuPS Iur Iub MS Uu MSC SGSN Gs GGSN GMSC Gn HLR Gr Gc C D E AuC H EIR F Gf Gi PSTN IuCS Gb VLR B Gp VLR G BTS BTS Um RNC Abis MSC B PSTN cell PCU UE
- 7. Internal Use 7 R99 Network Architecture R99 Network Architecture GSM /GPRS BSS BTS BSC NodeB RNC PCU UTRAN SCP SMS SCE PSTN ISDN Internet, Intranet MSC/VLR GMSC HLR/AUC SGSN CG BG GGSN GPRS 骨干网 / Other PLMN SS7
- 8. Internal Use 8 R99 Core Network R99 Core Network － － Features and Technologies Features and Technologies Core Network is split into CS domain and PS domain. CS domain is based on original GSM network. PS domain is based on original GPRS network. CS domain: used to provide Circuit-switched service. Network mode can support TDM, ATM and IP. Physical entities include switching equipment (such as MSC/VLR, GMSCs), and inter-working equipment (IWF). PS domain: used to provide Packet-switched service. Network mode is IP. Physical entities include SGSN, GGSN, CG , BG etc.
- 9. Internal Use 9 R99 Core network R99 Core network － － Function Entity(1) Function Entity(1) Function entity shared by CS domain and PS : HLR: to realize mobile subscriber management and location information management ; VLR: to deal with all kinds of data information of current mobile subscriber ; AUC: to store authentication information of mobile subscriber ; EIR: to store IMEI data of mobile subscriber; SMS: Short Message Center.
- 10. Internal Use 10 R99 Core network R99 Core network － － Function Entity(2) Function Entity(2) Function entity of CS domain: MSC: to realize switching and signaling control function of circuit service. GMSC: to realize addressing function for different network. GMSC and MSC can be integrated together or separated independently. IWF: integrated together with MSC, to realize inter-working with PLMN and ISDN, PSTN , PDN (Mainly complete signaling transfer function), its functions can be defined based on specified services and network types.
- 11. Internal Use 11 R99 Core Network R99 Core Network － － Function Entity(3) Function Entity(3) Function entity of PS domain: SGSN: to realize packet switching function, signaling control function and route function of packet service. GGSN: to realize inter-working with PS domain and external data network. CG: to realize billing function of packet service. BG: to realize inter-working of two GPRS network and guarantee the security of network.
- 12. Internal Use 12 R99 Core Network R99 Core Network － － Interface(1) Interface(1) Interface between CN and RAN/BSS: A Interface: to realize mobile station management, base station management, mobility management and call processing, etc. Gb interface: to realize packet data transmit and mobility management. Iu-CS interface: to realize RNS management, mobility management and call control function. Iu-PS interface: its basic function is similar to Iu-CS interface.
- 13. Internal Use 13 R99 Core Network R99 Core Network － － Interface(2) Interface(2) CS internal interface: B interface (MSC-VLR): A private interface between VLR and MSC. It is used for the MSC to query the current location information of a Mobile Station (MS) from the Visit Location Register (VLR), or request the VLR to update the current location information of the MS or is used for the operations of supplementary services. C interface (MSC-HLR): to get MSRN, the IN service related subscriber status and location information.
- 14. Internal Use 14 R99 Core Network R99 Core Network － － Interface(3) Interface(3) D interface (VLR-HLR): used to exchange the location information of the MS and the subscriber management information. E interface ( between MSC): to be used for handover process between two MSCs. F interface (MSC-EIR) : to be used for EIR to verify IMEI status information of mobile equipment. G interface (between VLR): to exchange IMSI and authentication information when MS moves from one VLR to another VLR.
- 15. Internal Use 15 R99 Core Network R99 Core Network － － Interface(4) Interface(4) PS internal interface: Gr interface (SGSN-HLR): to exchange mobile location information and manage subscriber signed information. It is similar to C interface. Gn, Gp interface (SGSN-GGSN): GTP is adopted, used for establish tunnel and transmit data packet between GSN equipment. Gc interface (GGSN-HLR) : optional. Gf interface (SGSN-EIR) . Gi interface (GGSN – external network). Common interfaces shared by CS and PS: Gs interface (MSC/VLR-SGSN): used for combined location update between MSC and SGSN) . H interface (HLR-AUC): used for authentication and ciphering. It is a private interface.
- 16. Internal Use 16 Chapter1 Core Network Evolution Chapter2 R99 Core Network Chapter3 R4 Core Network Chapter4 R5 Core Network
- 17. Internal Use 17 SCP SMS-C GMLC/SMLC HLR/EIR CAP MAP MAP MAP SIGTRAN SS7 UTRAN BSS TDM MGW MGW RTP(AAL2)/AMR IP(ATM) BackBone IP network GSM/R99PLMN PSTN/ISDN VMSC Server RANAP BSSAP AAL2 H.248 MAP BICC GMSC Server TDM/G.711 TDM/G.711 R4 Network Architecture R4 Network Architecture
- 18. Internal Use 18 R4 Core Network R4 Core Network － － Function Entities Function Entities MSC Server: control layer, to realize MM (mobility management), CM ( call control), MGC (media gate control) . MGW ： bearer layer, to realize the exchange of voice and media flow, and provide all kinds sources, such as TC, EC, play announcement and receive DTMF. SG: to realize signaling transfer from MTP (SS7 transmission layer) to SCTP/IP (SIGTRAN transmission layer).
- 19. Internal Use 19 R4 Core Network R4 Core Network － － Interface and Protocol Interface and Protocol (1) (1) MGW Mc Mc Nb Nc MSC Server MGW GMSC Server /ISUP/TUP MTP3 MTP3B M3UA MTP2 SSCF/SSCOP SCTP MTP1 AAL5/ATM IP H.248 SCTP UDP MTP3B IP SSCF/SSCOP/AAL5 RTP AAL2 Voice UDP/IP ATM PCM
- 20. Internal Use 20 R4 Core Network R4 Core Network － － Interface and Protocol Interface and Protocol (2) (2) Mc interface ((G)MSC Server–MGW) : H.248 is adopted, to realize the flexible connection processing for multi call mode, multi media ； Nc interface (MSC Server–(G)MSC Server) : to realize the inter-office call control. It adopts BICC protocol ； Nb interface ( Between MGWs) ： to realize the transfer of control and user information (voice, data, picture, media) in bearer layer ， and realize the transfer of different media frame format. RTP/UDP/IP and AAL2/ATM protocol is adopted.
- 21. Internal Use 21 Chapter3 R4 Core Network Chapter3 R4 Core Network Section 1 Networking and Interface Section 2 R4 Features Section 2 R4 Features
- 22. Internal Use 22 Bearer and Control Separated Bearer and Control Separated Control Layer Bearer Layer MSC H.248
- 23. Internal Use 23 Four-layer Architecture Four-layer Architecture Service Management Network Control Core Switching Edge Access SoftSwitch 3G Access AMG IAD Broadband Access PSTN TMG SG PLMN Packet Core Network UMG UMG App Server Policy Server iOSS IN SoftSwitch MRS S S R R
- 24. Internal Use 24 Chapter1 Core Network Evolution Chapter2 R99 Core Network Chapter3 R4 Core Network Chapter4 R5 Core Network
- 25. Internal Use 25 Chapter4 R5 Core Network Chapter4 R5 Core Network Section 1 R5 Networking Section 1 R5 Networking Section 2 SIP Introduction
- 26. Internal Use 26 GSM /GPRS BSS BTS BSC NodeB RNC PCU UTRAN SCP SMS SCE PSTN/PLMN Internet, Intranet HLR/AUC/HSS SGSN CG BG GGSN GPRS backbone MGW MGW MGW MGW VMSC Server GMSC Server IP/ATM Backbone CS domain PS domain Iu-CS Iu-PS IP backbone MRFP MRFP IMS domain MGW MGW P-CSCF S-CSCF MGCF MRFC SS7 R5 Network Architecture R5 Network Architecture
- 27. Internal Use 27 R5 Features R5 Features 3GPP R5 Features: Inherit all the WCDMA R4 service and functions. IMS ( IP Multimedia System) is added based on PS, CS of R5 is consistent with that of R4. Iu interface can select IP and ATM. IP based is a trend of networking. IP QoS is enhanced. Services are enhanced, such as OSA ， Push Service R5 realizes ALL IP network put forward by 3GPP. IP will become the bearing technology for all signaling message and change the original call flow.
- 28. Huawei Confidential. All Rights Reserved
Editor's Notes
- #4: 1, introduce the naming rule of all the 3GPP protocol versions . R = release , 99= year , 4 = sequence .In 2000, 3GPP changed the version naming rule . It divided R00 version into two part: R4 and R5 . They named the later version by sequence instead of years . 2, introduce the functionally frozen time . The official functionally frozen time of R99 is December 1999 ,while many equipment venders regard March 2000 as the real functionally frozen time . R4 was frozen in March 2001 ,and some functions was frozen in June 2001 .R5 was frozen in March 2002 and the remaining part in June 2002 . R6 is planned to freeze in September 2004 or December 2004 . 3, Raise a question :Whether the protocol would be update or not since it was frozen ? All the protocols would be updated all the time as the time went by .3GPP update all the protocols every 3 months . So the same specification of the same version of different date might be different . It is important to know about this . Because the equipment vender based on one fixed protocol to produce their product , although the protocols was changed during that period . So there might be some problem when one equipment interwork with others ,although these equipments use the same version specification but of different date . 4, Start to learn about the functions and the structure of different versions .
- #19: BICC : Bearer Independent Call Control SCTP : Stream Control Transmission Protocol
- #26: P-CSCF: (Proxy-Call State Control Function) I-CSCF : (Interrogating-CSCF) S-CSCF: (Serving-CSCF) HSS: (Home Subscriber Server) MGCF: Media Gateway Control Function MRF: Multimedia Resource Function MRFC: MRFP: 1)What is IMS? The IP Multimedia CN subsystem comprises all CN elements for provision of multimedia services. This includes the collection of signalling and bearer related network elements as defined in TS 23.002 [1].CSCF,MGCF,MRF; IP multimedia services are based on an IETF defined session control capability which, along with multimedia bearers, utilises the PS domain (this may include an equivalent set of services to the relevant subset of CS Services). 2)The function of IMS? The IM CN subsystem should enable the convergence of, and access to, voice, video, messaging, data and web-based technologies for the wireless user, and combine the growth of the Internet with the growth in mobile communications.(因特网发展与移动通信网发展的结合） 3)Relationship with PS and CS The IP multimedia subsystem utilizes the PS domain to transport multimedia signalling and bearer traffic. The PS domain maintains the service while the terminal moves and hides these moves from the IP multimedia subsystem. The IP multimedia subsystem is independent of the CS domain although some network elements may be common with the CS domain