ETSI TS 123 402 V18.3.0 (2024-05)

Universal Mobile Telecommunications System (UMTS); LTE; Architecture enhancements for non-3GPP accesses (3GPP TS 23.402 version 18.3.0 Release 18)

RTS/TSGS-0223402vi30

General Information

• Status: Not Published
• Technical Committee: 3GPP SA 2 - Architecture
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Completion Date: 22-May-2024

Standards Content (Sample)

TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
Architecture enhancements for non-3GPP accesses
(3GPP TS 23.402 version 18.3.0 Release 18)

3GPP TS 23.402 version 18.3.0 Release 18 1 ETSI TS 123 402 V18.3.0 (2024-05)

Reference
RTS/TSGS-0223402vi30
Keywords
LTE,UMTS
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ETSI
3GPP TS 23.402 version 18.3.0 Release 18 2 ETSI TS 123 402 V18.3.0 (2024-05)
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ETSI
3GPP TS 23.402 version 18.3.0 Release 18 3 ETSI TS 123 402 V18.3.0 (2024-05)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 12
Introduction . 12
1 Scope . 13
2 References . 13
3 Definitions, Symbols and Abbreviations . 16
3.1 Definitions . 16
3.2 Abbreviations . 17
4 Architecture Model and Concepts . 18
4.1 Concepts . 18
4.1.0 General Concepts . 18
4.1.1 General Concepts for Interworking Between E-UTRAN and CDMA2000 . 19
4.1.2 General Concepts for Interworking Between 3GPP Accesses and WiMAX . 19
4.1.3 IP Mobility Management Selection Principles . 19
4.1.3.1 Static Configuration of Inter-technology Mobility Mechanism . 19
4.1.3.2 Networks Supporting Multiple IP Mobility Mechanisms . 20
4.1.3.2.1 IP Mobility Management Selection During Initial Attach to a Non-3GPP Access . 21
4.1.3.2.2 IPMS solutions . 21
4.1.3.2.3 IP Mobility Management Selection on Handover between accesses . 21
4.1.4 Trusted/untrusted non-3GPP access network detection . 22
4.1.5 Non-seamless WLAN offload. 22
4.2 Architecture Reference Model . 23
4.2.1 Architecture for 3GPP Accesses with PMIP-based S5/S8 . 23
4.2.2 Non-roaming Architectures for EPS . 23
4.2.3 Roaming Architectures for EPS . 26
4.3 Network Elements . 30
4.3.1 Access Networks . 30
4.3.1.1 E-UTRAN . 30
4.3.1.2 Trusted and Untrusted Non-3GPP Access Network . 30
4.3.2 MME . 31
4.3.3 Gateway . 31
4.3.3.1 General . 31
4.3.3.2 Serving GW. 31
4.3.3.3 PDN GW . 32
4.3.4 ePDG . 32
4.3.5 PCRF . 33
4.3.5.1 Home PCRF . 33
4.3.5.2 Visited PCRF . 33
4.4 Reference Points . 33
4.4.1 List of Reference Points . 33
4.4.2 Reference Point Requirements . 35
4.4.2.1 S5 Reference Point Requirements . 35
4.4.2.2 Void. 36
4.4.2.3 Void. 36
4.4.2.4 Void. 36
4.5 High Level Functions . 36
4.5.1 PDN GW Selection Function for Non-3GPP Accesses for S2a and S2b . 36
4.5.1a PDN GW Selection Function for eHRPD with SIPTO support . 37
4.5.2 PDN GW Selection Function for S2c . 37
4.5.3 Serving GW Selection Function for Non-3GPP Accesses . 38
4.5.4 ePDG Selection . 39
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4.5.4.1 General . 39
4.5.4.2 ePDG FQDNs Construction . 39
4.5.4.3 UE Configuration By HPLMN . 39
4.5.4.4 UE ePDG Selection Procedure . 39
4.5.4.5 ePDG Selection with DNS-based Discovery of Regulatory Requirements . 40
4.5.4a ePDG Selection for Emergency Services . 41
4.5.4a.1 General . 41
4.5.4a.2 Emergency ePDG Selection Procedure . 41
4.5.5 PCRF Selection . 41
4.5.6 DSMIPv6 Home Link Detection Function . 42
4.5.7 IMS Emergency Session Support . 42
4.5.7.1 Overview . 42
4.5.7.2 IMS Emergency Session Support over WLAN access to EPC . 42
4.5.7.2.1 Introduction . 42
4.5.7.2.2 Architecture Reference Model for Emergency Services. 44
4.5.7.2.3 PDN GW selection function for Emergency Services . 44
4.5.7.2.4 QoS for Emergency Services . 44
4.5.7.2.5 PCC for Emergency Services . 44
4.5.7.2.6 IP Address Allocation . 44
4.5.7.2.7 Handling of PDN Connections for Emergency Bearer Services . 44
4.5.7.2.8 Network provided WLAN Location Information . 44
4.5.7.2.9 Determination of location . 47
4.5.7.2.10 Support of PS handover with 3GPP EPC . 47
4.5.8 APN congestion Control Function for eHRPD . 48
4.5.9 GTP-C signalling based Load and Overload Control for trusted and untrusted WLAN . 48
4.5.9.1 GTP-C load control . 48
4.5.9.2 GTP-C overload control . 48
4.6 Identities . 50
4.6.1 User Identification . 50
4.6.2 EPS bearer identity with GTP based S2b/S2a. 50
4.7 IP Address Allocation . 50
4.7.1 IP Address Allocation with PMIP-based S5/S8 . 50
4.7.2 IP Address Allocation in Trusted Non-3GPP IP Access using PMIPv6 on S2a . 55
4.7.3 IP Address Allocation in Untrusted Non-3GPP IP Access using PMIPv6 or GTP on S2b . 58
4.7.4 IP Address Allocation using S2c . 58
4.7.5 IPv6 Prefix Delegation using S2c . 59
4.7.6 IPv6 Prefix Delegation using PMIP-based S5/S8 . 59
4.8 Network Discovery and Selection . 61
4.8.0 General Principles . 61
4.8.1 Architecture for Access Network Discovery Support Functions . 62
4.8.2 Network Elements . 63
4.8.2.1 Access Network Discovery and Selection Function (ANDSF) . 63
4.8.2.1.1 General . 63
4.8.2.1.2 Inter-System Mobility Policy . 63
4.8.2.1.3 Access Network Discovery Information . 64
4.8.2.1.4 Inter-System Routing Policy . 64
4.8.2.1.5 Inter-APN Routing Policy . 65
4.8.2.1.6 WLAN Selection Policy . 66
4.8.2.1.7 VPLMNs with preferred WLAN Selection Rules . 68
4.8.2.1.8 Void . 68
4.8.2.1.9 Home Network Preferences . 68
4.8.2.1.10 Visited Network Preferences . 68
4.8.2a UE Procedures . 69
4.8.2a.1 Selection of Active ANDSF Rules . 69
4.8.2a.2 UE Behavior Based on the ANDSF Information . 70
4.8.2b WLAN Selection based on WLANSP . 72
4.8.3 Reference Points . 74
4.8.4 ANDSF Discovery . 74
4.8.5 Void . 74
4.8.6 Support of RAN Assistance Information . 74
4.8.6.1 General . 74
4.8.6.2 ANDSF Rules Utilizing RAN Assistance Information . 75
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4.8.6.3 Evaluation of ANDSF Rules with RAN Validity Conditions . 75
4.8.6.4 Co-existence with RAN Rules . 76
4.8.7 Support of LWA, LWIP and RCLWI . 77
4.8.7.1 General . 77
4.8.7.2 Co-existence with LWA and RCLWI . 77
4.8.7.3 Co-existence with LWIP . 78
4.9 Authentication and Security . 78
4.9.1 Access Authentication in non-3GPP Accesses . 78
4.9.2 Tunnel Authentication . 78
4.9.3 Support for EAP Re-Authentication . 79
4.10 QoS Concepts . 79
4.10.1 General . 79
4.10.2 Void . 79
4.10.3 The EPS Bearer with PMIP-based S5/S8 and E-UTRAN access . 80
4.10.4 Application of PCC in the Evolved Packet System . 80
4.10.5 PDN connectivity service with GTP based S2b . 81
4.10.5.1 Single IPSec SA per PDN Connection Scenario . 81
4.10.5.2 Single IPsec SA per S2b bearer Scenario . 82
4.11 Charging for Non-3GPP Accesses . 84
4.12 Multiple PDN Support . 84
4.13 Detach principles . 85
5 Functional Description and Procedures for 3GPP Accesses with PMIP-based S5/S8 . 85
5.1 Control and User Plane Protocol Stacks . 85
5.1.1 Void . 85
5.1.2 General . 85
5.1.3 Control Plane . 86
5.1.3.1 Serving GW - PDN GW . 86
5.1.4 User Plane . 86
5.1.4.1 UE – PDN GW User Plane with E-UTRAN . 86
5.1.4.2 UE – PDN GW User Plane with 2G access via the S4 Interface . 87
5.1.4.3 UE – PDN GW User Plane with 3G Access via the S4 Interface . 88
5.1.4.4 UE – PDN-GW User Plane with 3G Access via the S12 Interface . 88
5.2 Initial E-UTRAN Attach with PMIP-based S5 or S8 . 89
5.3 Detach for PMIP-based S5/S8 . 92
5.4 Dedicated Bearer Procedures for E-UTRAN Access with PMIP-based S5/S8 . 94
5.4.1 General . 94
5.4.2 Dedicated Bearer Activation . 95
5.4.3 Bearer Modification with Bearer QoS Update . 95
5.4.3.1 PCC Initiated Bearer Modification with Bearer QoS Update . 95
5.4.3.2 HSS-Initiated Subscribed QoS Modification . 95
5.4.4 Dedicated Bearer Modification without Bearer QoS Update . 96
5.4.5 Dedicated Bearer Deactivation . 97
5.4.5.1 PCC-initiated Dedicated Bearer Deactivation . 97
5.4.5.2 Void. 97
5.4.5.3 MME-initiated Dedicated Bearer Deactivation . 97
5.5 UE-initiated Resource Request and Release. 98
5.6 Multiple PDN Support with PMIP-based S5/S8 . 99
5.6.1 UE requested PDN connectivity . 99
5.6.2 PDN Disconnection . 101
5.6.2.1 UE, MME or S-GW initiated PDN Disconnection . 101
5.6.2.2 PDN-GW-initiated PDN Disconnection . 102
5.7 Handover and Tracking area Update Procedures for PMIP-based S5/S8 Interface. 103
5.7.0 Intra-LTE TAU and Inter-eNodeB Handover without Serving GW Relocation . 103
5.7.1 Intra-LTE TAU and Inter-eNodeB Handover with Serving GW Relocation. 104
5.7.2 TAU/RAU or Handover between GERAN A/Gb Mode or UTRAN Iu Mode and E-UTRAN . 105
5.8 ME Identity Check Procedures for PMIP-based S5/S8 . 108
5.9 UE-triggered Service Request for PMIP-based S5/S8 . 108
5.10 PMIP-based S5/S8 procedures for GERAN/UTRAN over S4 . 109
5.10.1 General . 109
5.10.2 GPRS procedures that update the PDN GW . 110
5.10.3 UE allocated resources . 111
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5.10.4 Network allocated resources . 112
5.10.5 UE released resources . 112
5.10.6 PDN GW released resources . 112
5.10.7 Attach . 113
5.10.8 Detach interaction using S4 . 113
5.10.9 Interaction with CGI/SAI reporting using S4 . 113
5.10.10 RAU Procedure Support . 113
5.11 PDN GW initiated IPv4 address Delete Procedure . 113
5.12 Location Change Reporting Procedure for PMIP-based S5/S8 . 115
5.13 Support for Machine Type Communications (MTC) . 115
5.13.1 General . 115
5.13.2 PDN GW control of overload . 116
5.13.3 Usage of low access priority indicator . 116
6 Functional Description and Procedures for Trusted Non-3GPP IP Accesses . 116
6.1 Control and User Plane Protocol Stacks . 116
6.1.1 Protocol Stacks for S2a . 116
6.1.2 Protocol Stacks for S2c over Trusted Non-3GPP IP Accesses . 118
6.2 Initial Attach on S2a . 118
6.2.1 Initial Attach Procedure with PMIPv6 on S2a and Anchoring in PDN GW . 118
6.2.2 Void . 121
6.2.3 Initial Attach procedure with MIPv4 FACoA on S2a and Anchoring in PDN-GW . 121
6.2.4 Initial Attach Procedure with PMIPv6 on S2a and Chained S2a and PMIP-based S8 . 124
6.3 Initial Attach Procedure with DSMIPv6 on S2c in Trusted Non-3GPP IP Access . 125
6.4 Detach and PDN Disconnection for S2a . 128
6.4.1 UE/Trusted Non-3GPP IP Access Network Initiated Detach and UE/Trusted Non-3GPP IP Access
requested PDN Disconnection Procedure with PMIPv6 . 128
6.4.1.1 Non-Roaming, Home Routed Roaming and Local Breakout Case . 128
6.4.1.2 Chained PMIP-based S8-S2a Roaming Case . 130
6.4.2 HSS/AAA Initiated Detach Procedure with PMIPv6 . 131
6.4.2.1 Non-Roaming, Home Routed Roaming and Local Breakout Case . 131
6.4.2.2 Chained PMIP-based S8-S2a Roaming Case . 132
6.4.3 UE-initiated Detach Procedure and UE-Requested PDN Disconnection Procedure with MIPv4
F ACo A . 133
6.4.4 Network Initiated Detach Procedure with MIPv4 FACoA . 134
6.4.5 HSS/AAA-initiated detach procedure with MIPv4 FACoA . 135
6.5 Detach and PDN Disconnection for S2c in Trusted Non-3GPP IP Access . 136
6.5.1 General . 136
6.5.2 UE-initiated PDN disconnection Procedure . 137
6.5.3 HSS / AAA-initiated Detach Procedure . 138
6.5.4 PDN GW-initiated PDN Disconnection Procedure . 139
6.6 Network-initiated Dynamic PCC . 140
6.6.1 Network-initiated Dynamic PCC on S2a . 140
6.6.2 Network-initiated Dynamic PCC for S2c over Trusted Non-3GPP IP Access . 141
6.7 UE-initiated Resource Request and Release. 142
6.7.1 UE-initiated Resource Request and Release on S2a . 142
6.7.2 UE-initiated Resource Request for S2c over Trusted Non-3GPP IP Access . 143
6.8 UE-initiated Connectivity to Additional PDN . 143
6.8.1 UE-initiated Connectivity to Additional PDN with PMIPv6 on S2a . 143
6.8.1.0 General . 143
6.8.1.1 Non-Roaming, Home Routed Roaming and Local Breakout Case . 143
6.8.1.2 Chained PMIP-based S8-S2a Roaming Case . 145
6.8.2 UE-initiated Connectivity to Additional PDN with MIPv4 FACoA on S2a. 146
6.8.3 UE-initiated Connectivity to Additional PDN from Trusted Non-3GPP IP Access with DSMIPv6 on
S2c . 147
6.9 Void . 147
6.10 PDN GW reallocation upon attach on S2c . 148
6.11 S2c Bootstrapping via DSMIPv6 Home Link over a Trusted Access . 149
6.12 PDN GW initiated Resource Allocation Deactivation . 149
6.12.1 PDN GW initiated Resource Allocation Deactivation with S2a PMIP . 149
6.12.2 PDN GW initiated Resource Allocation Deactivation with S2a MIPv4 . 150
6.12.3 PDN GW initiated Resource Allocation Deactivation for Chained PMIP-based S8-S2a Roaming . 151
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6.12.4 Void . 152
6.13 PDN GW initiated IPv4 address Delete Procedure . 152
6.14 Non-3GPP access initiated IPv4 address Delete Procedure . 153
6.15 IPv4 Home Address Release Procedure for S2c . 154
6.16 Enhanced security support for S2c . 156
6.16.1 General . 156
6.16.2 Activation of enhanced security for S2c . 156
6.16.3 De-activation of enhanced security for S2c . 157
7 Functional Description and Procedures for Un-trusted Non-3GPP IP Accesses . 158
7.1 Control and User Plane Protocol Stacks . 158
7.1.1 Protocol Options for S2b . 158
7.1.2 Protocol Options for S2c over Un-trusted Non-3GPP IP Accesses . 159
7.2 Initial Attach on S2b. 160
7.2.1 Initial Attach with PMIPv6 on S2b . 160
7.2.2 Void . 162
7.2.3 Initial Attach Procedure with PMIPv6 on S2b and Chained S2b and PMIP-based S8 . 162
7.2.4 Initial Attach with GTP on S2b . 162
7.2.5 Initial Attach for emergency session (GTP on S2b) .
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