CONTENTS

�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)
������ 8.43���� Reference Point PDG � packet data networks (Wi reference point)
������ 8.44���� Reference Point WAG � WLAN access network (Wn 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