1
Scope
2 References
2.1 Normative references
2.2 Informative references
3 Definitions
4 Abbreviations and acronyms
5 Introduction
6 Basic architecture for the UMTS IMT-2000
family member
7 Network entities
7.1 Gateway Mobile Switching Centre
(GMSC)
7.2 Mobile Switching Centre and
Visitor Location Register (MSC/VLR)
7.3 Home Subscriber Server (HSS)
7.4 Equipment Identity Register (EIR)
7.5 SMS Gateway MSC (SMS-GMSC)
7.6 SMS Interworking MSC
7.7 Gateway GPRS Support Node (GGSN)
7.8 Serving GPRS Support Node (SGSN)
7.9 Circuit Switched – Media Gateway
Function (CS-MGW)
7.10 IP Multimedia (IM) Core Network
(CN) subsystem entities
7.11 Signalling Gateway Function (SGW)
7.12 Global Text Telephony Specific
entities
7.13 Security Gateway (SEG)
7.14 Gateway Mobile Location Centre (GMLC)
7.15 GPRS Service Switching Function
(gprsSSF)
7.16 GSM Service Control Function
(gsmSCF)
7.17 GSM Service Switching Function
(gsmSSF)
7.18 GSM Specialized Resource Function
(gsmSRF)
7.19 Gateway Location Register (GLR)
7.20 Intermediate GPRS Serving Node
(IM-GSN)
7.21 Intermediate Mobile-service
Switching Centre (IM-MSC)
8 Interfaces and reference points
8.1 C Interface (Gateway Mobile
Switching Centre Server (GMSC Server) –Home Location Register (HLR))
8.2 D Interface (Visitor Location
Register (VLR) – Home Location Register (HLR))
8.3 E Interface (Mobile Switching
Centre Server (MSC Server) – Mobile Switching Centre Server (MSC Server))
8.4 F Interface (Mobile Switching
Centre Server (MSC Server) – Equipment Identity Register (EIR))
8.5 G Interface (Visitor Location
Register (VLR) – Visitor Location Register (VLR))
8.6 Gc Interface (Home Location
Register (HLR) – Gateway GPRS Support Node (GGSN))
8.7 Gf Interface (Equipment Identity
Register (EIR) – Serving GPRS Support Node (SGSN))
8.8 Reference point GGSN – packet data
networks (Gi reference point)
8.9 GLa Interface (Gateway Location
Register (GLR) – Home Location Register (HLR))
8.10 GLb Interface (Gateway Location
Register (GLR) – Visitor Location Register (VLR))
8.11 GLc Interface (Gateway Location Register
(GLR) – Serving GPRS Support Node (SGSN))
8.12 GLd Interface (Gateway Location
Register (GLR) – Intermediate Mobile services Switching Centre (IM-MSC))
8.13 GLe Interface (Gateway Location
Register (GLR) – Intermediate GPRS Serving Node (IM-GSN))
8.14 GLf Interface (Gateway Location
Register (GLR) – Short Message Service-Gateway Mobile Switching Centre
(SMS-GMSC))
8.15 GLg Interface (Intermediate
Mobile-services Switching Centre (IM-MSC) – Short Message Service-Gateway
Mobile Switching Centre (SMS-GMSC))
8.16 GLh Interface (Intermediate
Mobile-services Switching Centre (IM-MSC) – Mobile Switching Centre (MSC))
8.17 GLi Interface (Intermediate Mobile-services Switching Centre (IM‑MSC)
– Gateway Mobile Location Centre (GMLC))
8.18 GLj Interface (Intermediate GPRS
Serving Node (IM-GSN) – Gateway GPRS Support Node (GGSN))
8.19 GLk Interface (Intermediate GPRS
Serving Node (IM-GSN) – Serving GPRS Support Node (SGSN))
8.20 Gn Interface (Gateway GPRS Support
Node (GGSN) – Serving GPRS Support Node (SGSN))
8.21 Gp Interface (Serving GPRS Support
Node (SGSN) – External Data Network)
8.22 Gr Interface (Home Location
Register (HLR) – Serving GPRS Support Node (SGSN))
8.23 Gs Interface (Mobile Switching
Centre (MSC)/Visitor Location Register (VLR) – Serving GPRS Support Node
(SGSN))
8.24 gsmSCF – HLR Interface
8.25 gsmSCF – gsmSRF Interface
8.26 gsmSSF – gsmSCF Interface
8.27 gprsSSF – gsmSCF Interface
8.28 H Interface (Home Location
Register (HLR) – Authentication Centre (AuC))
8.29 IuBC Interface (Cell Broadcast
Centre (CBC) – Radio Network Subsystem (RNS))
8.30 IuCS Interface (Mobile Switching
Centre (MSC) – RNS or BSS)
8.31 IuPS Interface (Serving GPRS
Support Node (SGSN) – RNS or BSS)
8.32 A Interface (Mobile Switching
Centre (MSC) – Base Station System (BSS))
8.33 Gb Interface (Serving GPRS Support
Node (SGSN) – Base Station System (BSS))
8.34 Reference point GMLC – external
LCS Client (Le reference point)
8.35 LCS interfaces using MAP
8.36 Mc Reference Point (Mobile
Switching Centre Server (MSC Server) –Circuit Switched Media Gateway
(CS-MGW))
8.37 Mobile Switching Centre (MSC) –
gsmSCF Interface
8.38 Nb Reference Point (Circuit Switched Media Gateway (CS-MGW) –Circuit
Switched Media Gateway (CS-MGW))
8.39 Nc Reference Point (Mobile
Switching Centre Server (MSC Server) –Gateway Mobile Switching Centre Server
(GMSC Server))
8.40 Reference point fixed networks – MSC
8.41 IM Subsystem Reference Points
8.42 Reference Point CSCF – Multimedia
IP networks (Mm Reference Point)
9 Technical specifications structure
10 Technical specifications
10.1 21-series, requirements specifications
10.2 22-series, service aspects
10.3 23-series, Technical realization
10.4 24-series, Signalling protocols
(User Equipment-Core Network)
10.5 26-series, Codecs (speech, video,
etc.)
10.6 27-series, Data
10.7 28-series, Signalling protocols
(RSS-CN)
10.8 29-series, Signalling protocols
(NSS)
10.9 31-series, UIM User Identity
Module
10.10 32-series, operation and
maintenance
10.11 33-series, Security aspects
10.12 35-series, Algorithm
specifications