UMTS UTRAN Signaling
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i Content 5
ii Preface 9
iii Acknowledgements 11
iv About the Authors 12
1 UMTS Basics 13
1.1 Standards 15
1.2 Network Architecture 17
1.2.1 GSM 17
1.2.2 UMTS Release 99 18
1.2.3 UMTS Release 4 19
1.2.4 UMTS Release 5 20
1.3 UMTS Interfaces 22
1.3.1 Iu Interface 22
1.3.2 Iub Interface 23
1.3.3 Iur Interface 24
1.4 UMTS Domain Architecture 25
1.5 UTRAN 26
1.5.1 UTRAN Tasks 26
1.5.2 RNC Tasks 27
1.5.3 Node B Tasks 27
1.5.4 Area Concept 28
1.5.5 UMTS User Equipment & USIM 28
1.5.6 Mobiles 29
1.5.7 QoS Architecture 31
1.5.8 UMTS Security 32
1.5.9 UTRAN Encryption 34
1.5.10 Integrity Protection 35
1.5.11 Micro Diversity – Multipath 36
1.5.12 Micro Diversity – Softer Handover 36
1.5.13 Macro Diversity – Soft Handover 37
1.5.14 UMTS Network Transactions 38
1.6 Radio Interface Basics 39
1.6.1 Duplex Methods 39
1.6.2 Multiple Access Methods 39
1.6.3 UMTS CDMA 40
1.6.4 CDMA Spreading 41
1.6.5 UMTS Spreading 42
1.6.6 Scrambling 42
1.6.7 Coding Summary 43
1.6.8 Signal to Interference 43
1.6.9 Cell Breathing 44
1.6.10 UMTS Channels 45
1.6.11 Transport Channels 47
1.6.12 Common Transport Channels 47
1.6.13 Dedicated Transport Channels 48
1.6.14 Initial UE Radio Access 49
1.6.15 Power Control 50
1.6.16 UE Random Access 51
1.6.17 Power Control in Soft Handover 52
1.7 UMTS Network Protocol Architecture 53
1.7.1 Iub – Control Plane 53
1.7.2 Iub – User Plane 54
1.7.3 Iur – User/Control Plane 55
1.7.4 Iu-CS – User/Control Plane 55
1.7.5 Iu-PS – User/Control Plane 56
1.7.6 E – User/Control Plane 56
1.7.7 Gn – User/Control Plane 57
1.8 ATM 58
1.8.1 ATM Cell 58
1.8.2 ATM Layer Architecture 59
1.8.3 ATM Adaption Layer (AAL) 60
1.8.4 AAL2 60
1.8.5 AAL5 61
1.9 User Plane Framing Protocol 62
1.9.1 Frame Architecture 62
1.9.2 FP Control Frame Architecture 62
1.10 Medium Access Protocol (MAC) 64
1.10.1 MAC Architecture 64
1.10.2 MAC Data PDU65
1.10.3 MAC Header Alternatives 66
1.11 Radio Link Control (RLC) 67
1.11.1 RLC Services 67
1.11.2 RLC Functions 68
1.11.3 RLC Architecture 70
1.11.4 RLC Data PDUs 70
1.11.5 Other RLC PDUs 71
1.12 Service Specific Connection Oriented Protocol (SSCOP) 72
1.12.1 Example – SSCOP 73
1.13 Service Specific Coordination Function (SSCF) 74
1.14 Message Transfer Part Level 3 – Broadband (MTP3-B) 74
1.15 Internet Protocol (IP) 75
1.15.1 IPV4 Frame Architecture 75
1.16 Signaling Transport Converter (STC) 77
1.17 Signaling Connection Control Part (SCCP) 78
1.17.1 Example – SCCP 79
1.18 Abstract Syntax Notation One in UMTS (ASN.1) 80
1.18.1 ASN.1 Basic Encoding Rules (BER) 80
1.18.2 ASN.1 Packed Encoding Rules (PER) 81
1.19 Radio Resource Control (RRC) 82
1.19.1 RRC States 83
1.19.2 System Information Blocks (SIB) 86
1.19.3 Example – Broadcast System Information 88
1.19.4 Example – RRC Connection Establishment 90
1.19.5 Example – RRC Connection Release 91
1.19.6 Example – RRC Signaling Connection 93
1.20 Node B Application Part (NBAP) 94
1.20.1 NBAP Functions 94
1.20.2 NBAP Elementary Procedures (EPs) 95
1.20.3 Example – NBAP 95
1.21 Radio Network Subsystem Application Part (RNSAP) 96
1.21.1 RNSAP Functions 96
1.21.2 Example – RNSAP Procedures 97
1.22 Radio Access Network Application Part (RANAP) 98
1.22.1 RANAP Elementary Procedures (EPs) 99
1.22.2 Example – RANAP Procedure 100
1.23 ATM Adaptation Layer Type 2 – Layer 3 (AAL2L3/ALCAP) 101
1.23.1 AAL2L3 Message Format 101
1.23.2 Example – AAL2L3 Procedure 102
1.24 Iu User Plane Protocol 104
1.24.1 Iu-UP Transparent Mode 104
1.24.2 Iu-UP Support Mode Data Frames 105
1.24.3 Iu-UP Support Mode Control Frames 106
1.24.4 Example – Iu-UP Support Mode Message Flow 107
1.25 Adaptive Multi-Rate Codec (AMR) 108
1.25.1 AMR IF 1 Frame Architecture 109
1.26 Terminal Adaption Function (TAF) 110
1.27 Radio Link Protocol (RLP) 111
1.28 Packet Data Convergence Protocol (PDCP) 112
1.28.1 PDCP PDU Format 112
1.29 Broadcast/Multicast Control (BMC) 113
1.29.1 BMC Architecture 114
1.30 Circuit Switched Mobility Management (MM) 115
1.31 Circuit Switched Call Control (CC) 115
1.32 Example – Mobile Originated Call (Circuit Switched) 116
1.33 Packet Switched Mobility Management (GMM) 117
1.34 Packet Switched Session Management (SM) 117
1.35 Example – Activate PDP Context (Packet Switched) 118
1.36 GPRS Tunneling Protocol (GTP) 119
1.36.1 Example – GTP-C and GTP-U120
1.36.2 Example – GTP’ 121
2 UMTS UTRAN Signaling Procedures 123
2.1 Iub – Node B Setup 125
2.2 Iub – IMSI/GPRS Attach Procedure 135
2.3 Iub CS – Mobile Originated Call 147
2.4 Iub CS – Mobile Terminated Call 155
2.5 Iub PS – PDP Context Activation/Deactivation 161
2.6 Iub – IMSI/GPRS Detach Procedure 169
2.7 Iub – Physical Channel Reconfiguration (PDPC) 173
2.8 Iub – Mobile Originated Call with Soft Handover
(Inter Node B, Intra RNC) 179
2.9 Iub – Softer Handover 189
2.10 Iub-Iu – Location Update 193
2.11 Iub-Iu – Mobile Originated Call 199
2.12 Iub-Iu – Mobile Terminated Call 207
2.13 Iub-Iu – Attach 213
2.14 Iub-Iu – PDP Context Activation/Deactivation 217
2.15 Iub-Iu – Detach 225
2.16 Iub-Iur – Soft Handover (Inter Node B, Inter RNC) 229
2.17 Iub-Iur – Forward Handover (Inter Node B, Inter RNC) 235
2.18 Backward Hard Handover (Inter Node B, Inter RNC) 243
2.19 SRNS Relocation (UE not involved) 251
2.20 SRNS Relocation (UE Involved) 259
2.21 Inter System Handover UTRAN-GSM 265
3 Bibliography 267
3.1 Technical Specifications 267
3.1.1 Extract of UMTS-related Specifications 267
3.2 Other Literature 269
4 Glossary 271
5 Index 289
