3G Mobile Networks Architecture, Protocols and Procedures _ _ _ _ _ _ _ _ _ Sumit Kasera Senior Technical Leader, Hughes Software Systems Gurgaon, India Nishit Narang Senior Technical Leader, Hughes Software Systems Gurgaon, India McGraw-Hill New York Chicago San Francisco Lisbon London Madrid Mexico City Milan New Delhi San Juan Seoul Singapore Sydney Toronto
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3G Mobile Networks Architecture, Protocols and Procedures
_ _ _ _ _ _ _ _ _
Sumit Kasera Senior Technical Leader, Hughes Software Systems
Gurgaon, India
Nishit Narang Senior Technical Leader, Hughes Software Systems
Gurgaon, India
McGraw-Hill New York Chicago San Francisco Lisbon London
Madrid Mexico City Milan New Delhi San Juan Seoul Singapore Sydney Toronto
CONTENTS
Foreword
Preface
Acknowledgements
PART I-INTRODUCTION AND BACKGROUND
Introduction 1.1 Introduction 3 1.2 Second Generation Mobile Networks 3
1.2.1 Limitations of 2G Networks 4 1.3 2.5 Generation Mobile Networks 5
1.4 International Mobile Telecommunication-2000 (IMT-2000) 6
1.5 Third Generation Partnership Program (3GPP) 8 1.5.1 Interaction of 3GPP with other bodies 8 1.5.2 Objective of 3GPP 9 1.5.3 3GPP Technical Specifications Group (TSG) 10 1.5.4 Stages of 3GPP Specifications 12 1.5.5 Series of 3GPP Specifications 13 1.5.6 Version Numbering of 3GPP Specifications 13 1.5.7 Releases of 3GPP Specifications 15 1.5.8 Evolution towards 3GPP Networks 16
Summary 17 Principles Of WCDMA 2.1 Introduction 19
Vlll Contents
2.2 Requirements for Third Generation Air Interface 19 2.3 Scheines for Radio Access 21 2.4 WCDMA Overview 22
3.4 Hierarchical Network Organization 56 3.4.1 Public Land Mobile Network (PLMN) 56 3.4.2 Location Area (LA) 57 3.4.3 Routing Area (RA) 58 3.4.4 UTRAN Registration Area (URA) 59 3.4.5 Cell Global Identity (CGI) 59
3.5 Addresses and Identifiers 60 3.5.1 Subscriber Identity 60
5.2.1 Base Station Sub-system (BSS) 89 5.2.2 Radio Network Sub-system (RNS) 90
5.3 Network Interfaces 91 5.3.1 Abis Interface between BSC and BTS 92 5.3.2 lub Interface between RNC and Node B 92 5.3.3 Iur Interface between RNCs 93 5.3.4 A Interface between MSC/VLR and BSS 94 5.3.5 Gb Interface between SGSN and BSS 94 5.3.6 Iu Interface between CN and RNS 94
5.6 Functions 205 5.6.1 Transfer of User Data 206 5.6.2 System Access Control 206 5.6.3 Security Functions 206 5.6.4 Mobility Management 207 5.6.5 Radio Resource Management 207 5.6.6 Broadcast and Multicast Services 209 5.6.7 Other Functions 220
5.7 Radio Interface Protocols 220 5.7.1 Physical Layer 220 5.7.2 Medium Access Control (MAC) 223
5.7.3 Radio Link Control (RLC) 117 5.7'.4 Packet Data Convergence Protocol (PDCP) 121 5.7.5 Broadcast/Multicast Control (BMC) 223 5.7.6 Radio Resource Control (RRC) 224
5.8 ATM-based Transport Network Protocols 230 5.8.1 Asynchronous Transfer Mode (ATM) 232 5.8.2 ATM Adaptation Layer 2 (AAL2) 235 5.8.3 ATM Adaptation Layer 5 (AAL5) 237 5.8.4 Service Specific Cormection Oriented Protocol (SSCOP) 5.8.5 Service-Specific Co-ordination Function for
NNI (SSCF-NNI) 240 5.8.6 Service-Specific Co-ordination Function for
UNI (SSCF-UNI) 242 5.8.7 Message Transfer Part 3 for Broadband (MTP3b) 242 5.8.8 Signaling Transport Converter (STC) 243 5.8.9 AAL2 Signaling 244
5.9 Application Layer Protocols 247 5.9.1 Radio Access Network Application Part (RANAP) 148 5.9.2 Radio Network Sub-system Application Part
(RNSAP) 250 5.9.3 NBAP 253 5.9.4 Service Area Broadcast Protocol (SABP) 257 5.9.5 Iu User Plane (UP) Protocol 258 5.9.6 Framing Protocols for Iub and Iur Interface 262
Summary 163 6. Core Network
6.1 Introduction 264 6.2 Entities Common to CS and PS Domain 265
6.2.1 Home Location Register (HLR) 265 6.2.2 Authentication Center (AuC) 266 6.2.3 Equipment Identity Register (EIR) 267 6.2.4 Short Message Service (SMS) Entities 267
6.3 Entities Specific to the CS Domain 267 6.3.1 Visitor Location Register (VLR) 268 6.3.2 Mobile Switching Center (MSC) 168 6.3.3 Gateway Mobile Switching Center (GMSC) 269
6.4 Entities Specific to the PS Domain 169 6.4.1 Serving GPRS Support Node (SGSN) 169 6.4.2 Gateway GPRS Support Node (GGSN) 170 6.4.3 Border Gateway (BG) 170
6.5 Service-specific Entities of the Core Network 170 6.5.1 Gateway Mobile Location Center (GMLC) 171 6.5.2 CAMEL Entities 271 6.5.3 Cell Broadcast Center (CBC) 171
6.6 Network Interfaces of CS Domain 171 6.6.1 B Interface between MSC and VLR 172 6.6.2 C Interface between GMSC and HLR 173 6.6.3 D Interface between VLR and HLR 174 6.6.4 E Interface between MSC and MSC 274 6.6.5 F Interface between MSC and EIR 274 6.6.6 G Interface between VLR and VLR 274 6.6.7 Nb/Nc Interface between MSC and GMSC 275 6.6.8 Interface between VLR and SMS-MSC 275
6.7 Interfaces of PS Domain 275 6.7.1 Gn/Gp Interface between two GSNs 176 6.7.2 Gi Interface between GGSN and PDN 178 6.7.3 Gr Interface between SGSN and HLR 278 6.7.4 Gs Interface between SGSN and MSC/VLR 279 6.7.5 Gf Interface between SGSN and EIR 279 6.7.6 Gc Interface between GGSN and HLR 280 6.7.7 Gd Interface between SGSN and SMS-MSC 280
6.8 CS Domain Protocol Architecture 280 6.8.1 User Plane 280 6.8.2 Control Plane 282
6.9 PS Domain Protocol Architecture 284 6.9.1 User Plane 284 6.9.2 Control Plane 285
8.1 Introduction 263 8.2 UTRAN Global Signaling Procedures 264
8.2.1 System Information Broadcasting 264 8.2.2 Service Area Broadcast 265
8.3 UTRAN Signaling Procedures for a Specific UE 265 8.3.1 Paging 266 8.3.2 NAS Signaling Connection Establishment 267 8.3.3 RRC Connection Establishment 268 8.3.4 RRC Connection Release 272 8.3.5 Radio Access Bearer Establishment 273 8.3.6 Radio Access Bearer Release 278 8.3.7 Physical Channel Reconfiguration 278 8.3.8 Transport Channel Reconfiguration 280 8.3.9 Soft Handover 282 8.3.10 SRNC Relocation 285 8.3.11 Cell Update 287 8.3.12 URA Update 289 8.3.13 Direct Transfer 290
Summary 291 9. Mobility Management 292
9.1 Introduction 292 9.2 State Model for Mobility Management 293 9.3 Hierarchical Management of Location
Information 295
Contents XV
9.4 Paging 296 9.5 MM/GMM Procedures Overview 296 9.6 MM Procedures in the Mobile Station 298
9.6.1 MS 'Idle Mode' Procedures 299 9.6.2 MS 'Connected Mode' Procedures 304
9.7 MM Procedures in the Access Network 304 9.8 MM Procedures in the Core Network 305
9.8.1 MM Procedures in CS Domain 305 9.8.2 MM Procedures in PS Domain 313 9.8.3 Super-Charger Functionality 320
Summary 323 10. Call Handling
10.1 Introduction 324 10.2 Architecture of MO and MT Calls 325
10.2.1 Architecture of Mobile-Originated Call 325 10.2.2 Architecture of Mobile-Terminated Call 326 10.2.3 Architecture of a Basic Mobile-to-Mobile Call 328
10.4.1 Retrieval of Routing Information 333 10.4.2 MT Call Handling at VPLMN 335
10.5 Interaction of CF and CB Services With Call Handling Procedures 338 10.5.1 Interaction of CF and CB Services with MT Calls 339 10.5.2 Interaction of CB Service with MO Calls 340
10.6 Support for Optimal Routing 341 10.6.1 Conditions for Optimal Routing 342 10.6.2 Information Flows for Optimal Routing 343
10.7 Immediate Service Termination (IST) 350 10.7.1 IST Alert Service 350
15.3 Stream Control Transmission Protocol (SCTP) 477 15.3.1 Functions of SCTP 478
15.4 SS7 MTP3 User Adaptation Layer (M3UA) 479 15.4.1 Functions of M3UA 479 15.4.2 Scenarios for Deployment of M3UA in
UMTS Network 480 15.5 SCCP User Adaptation Layer (SUA) 481
15.5.1 Functions of SUA 482
15.5.2 Scenarios for Deployment of SUA in UMTS Network 482 15.6 Comparison Between M3UA and SUA 483 Summary 484
Contents XIX
16. IP Multimedia Subsystem 486 16.1 Introduction 486 16.2 Entities of IP Multimedia Subsystem 488
16.2.1 Home Subscriber Server (HSS) 490 16.2.2 Call Session Control Function (CSCF) 491 16.2.3 Server Locator Function (SLF) 492 16.2.4 Application Server (AS) 492 16.2.5 Entities used for Interworking 493 16.2.6 Signaling Gateway Function (SGW) 493
16.3 Network Interfaces of IP Multimedia Subsystem 494 16.3.1 Cx Interface between HSS - CSCF 496 16.3.2 Dx Interface between CSCF and SLF 496 16.3.3 Sh Interface between HSS and AS 497 16.3.4 Si interface between HSS - CAMEL 498 16.3.5 ISC Interface between S-CSCF and AS 498 16.3.6 Gm Interface between UE and CSCF 498 16.3.7 Mc Interface between MGCF and MGW 499 16.3.8 Mg Interface between MGCF and S-CSCF 499 16.3.9 Mw Interface between x-CSCF and y-CSCF 499 16.3.10 Mi Interface between S-CSCF and BGCF 499 16.3.11 Mj Interface between BGCF and MGCF 499 16.3.12 Mk Interface between BGCF and BGCF 499
16.4 IMS Addressing 499 16.4.1 IMS Private User Identity (IMPI) 500 16.4.2 IMS Public User Identity (IMPU) 500 16.4.3 Relationship of IMPI and IMPU 500
16.5 Subscriber Data 501 16.6 Session-unrelated Procedures 503
16.9 Security in IP Multimedia Subsystem 522 16.9.1 Access Security 523
Summary 524
APPENDICES
Appendix A: Deployment of 3G Networks 526 A.l Japan 526 A.2 UK 527 A.3 Italy 52S Summary 528
Appendix B: Fourth Generation (4G) Mobile Networks 529 B.l Why 4G? 529 B.2 What is 4G? 530 B.3 How to Achieve 4G? 532 B.4 When Should We Expect 4G? 534