Content for TR 23.700-54 Word version: 19.0.0
5 Key Issues p. 12
5.1 Key Issues for DualSteer p. 12
5.1.1 Key Issue #1.1: Subscription aspects to support DualSteer p. 12
5.1.1.1 Description p. 12
5.1.2 Key Issue #1.2: Registration and mobility management for DualSteer p. 13
5.1.2.1 Description p. 13
5.1.3 Key Issue #1.3: Session management aspects for DualSteer p. 13
5.1.3.1 Description p. 13
5.1.4 Key Issue #1.4: Policy enhancements for DualSteer p. 13
5.1.4.1 Description p. 13
5.2 Key Issues for ATSSS_Ph4 p. 14
6 Solutions p. 15
6.0 Mapping of Solutions to Key Issues p. 15
6.1 Solutions for DualSteer p. 15
6.1.1 Solution #1.1: Supporting dual-steer connection re-using certain ATSSS functionality p. 15
6.1.1.1 Overall Description p. 15
6.1.1.1.1 Introduction p. 15
6.1.1.1.2 Architectures p. 16
6.1.1.1.3 Registration p. 18
6.1.1.1.4 Policy p. 18
6.1.1.1.5 Subscription and UE context data in UDM/UDR p. 20
6.1.1.1.6 Session management p. 20
6.1.1.2 Procedures p. 20
6.1.1.3 Impacts on services, entities and interfaces p. 24
6.1.2 Solution #1.2: Alternative SUPI in UE subscription p. 24
6.1.2.1 Description p. 24
6.1.2.2 Procedures p. 25
6.1.2.3 Impacts on services, entities and interfaces p. 26
6.1.3 Solution #1.3: E2E Solution to support DualSteer devices in 5GS p. 27
6.1.3.1 Description p. 27
6.1.3.1.0 Background p. 27
6.1.3.1.1 DualSteer device in 5GS p. 27
6.1.3.1.2 Registration and subscription data impacts to support DualSteer device p. 28
6.1.3.1.3 Session Management and subscription data impacts to support DualSteer device p. 29
6.1.3.1.4 Policy to support DualSteer p. 30
6.1.3.2 Procedures p. 33
6.1.3.2.1 Enhancements to Registration procedure p. 33
6.1.3.2.2 Selecting same SMF for serving PDU Sessions from two SUPIs p. 35
6.1.3.2.3 Enhancements to PFCP session management p. 38
6.1.3.3 Impacts on services, entities and interfaces p. 39
6.1.4 Solution #1.4: Support of DualSteer using overlay-underlay architecture p. 41
6.1.4.1 Description p. 41
6.1.4.2 Procedures p. 43
6.1.4.3 Impacts on services, entities and interfaces p. 44
6.1.5 Solution #1.5: DualSteer Solution on Subscription, Registration, Session Management and Policy Management p. 44
6.1.5.1 Description p. 44
6.1.5.1.1 General p. 44
6.1.5.1.2 Architecture principles p. 45
6.1.5.1.3 Subscription Management aspects p. 46
6.1.5.1.4 Registration aspects p. 48
6.1.5.1.5 PDU Session establishment aspects p. 49
6.1.5.1.6 Policy aspects p. 50
6.1.5.2 Procedures p. 50
6.1.5.2.1 General p. 50
6.1.5.2.2 Registration procedure p. 50
6.1.5.2.3 PDU Session Establishment procedure p. 52
6.1.5.3 Impacts on services, entities and interfaces p. 55
6.1.6 Solution #1.6: Registration Management and Policy Control for DualSteer Device p. 56
6.1.6.1 Description p. 56
6.1.6.1.1 Registration management for DualSteer device p. 56
6.1.6.1.2 DualSteer policy for DualSteer device after registration for DualSteer device p. 58
6.1.6.2 Procedures p. 60
6.1.6.3 Impacts on services, entities and interfaces p. 60
6.1.7 Solution #1.7: The UE subscription data for DualSteer in the UDM/UDR p. 61
6.1.7.1 Description p. 61
6.1.7.2 Procedures p. 61
6.1.7.3 Impacts on services, entities and interfaces p. 61
6.1.8 Solution #1.8: DualSteer authorization via Registration procedure p. 62
6.1.8.1 Description p. 62
6.1.8.2 Procedures p. 64
6.1.8.2.1 General p. 64
6.1.8.2.2 Registration procedure for the primary SUPI p. 65
6.1.8.2.3 Registration Procedure for Secondary SUPI p. 66
6.1.8.3 Impacts on services, entities and interfaces p. 67
6.1.9 Solution #1.9: DualSteer Registration and Mobility Management p. 68
6.1.9.1 Description p. 68
6.1.9.2 Procedures p. 68
6.1.9.2.1 DualSteer Registration p. 68
6.1.9.2.2 DualSteer De-Registration p. 69
6.1.9.2.3 DualSteer Subscription p. 69
6.1.9.3 Impacts on services, entities and interfaces p. 69
6.1.10 Solution #1.10: Registration Procedure over second 3GPP access network p. 70
6.1.10.1 Description p. 70
6.1.10.2 Procedures p. 71
6.1.10.3 Impacts on services, entities and interfaces p. 72
6.1.11 Solution #1.11: Session Establishment p. 72
6.1.11.1 Description p. 72
6.1.11.1.1 Proposed URSP enhancements for DualSteer p. 73
6.1.11.1.2 DualSteer steering and switching rules (DualSteer UE/UPF Rules) p. 74
6.1.11.2 Procedures p. 76
6.1.11.3 Impacts on services, entities and interfaces p. 80
6.1.12 Solution #1.12: Session Management Solution for DualSteer using procedures similar to ATSSS Procedures p. 80
6.1.12.1 Introduction p. 80
6.1.12.2 Description p. 81
6.1.12.3 Procedures p. 82
6.1.12.4 Impacts on services, entities and interfaces p. 86
6.1.13 Solution #1.13: DualSteer solution based on ATSSS p. 86
6.1.13.1 Introduction p. 86
6.1.13.2 High-level Description p. 86
6.1.14 Solution #1.14: Session management enhancements based on correlation ID p. 88
6.1.14.1 Description p. 88
6.1.14.2 Procedures p. 89
6.1.14.3 Impacts on services, entities and interfaces p. 91
6.1.15 Solution #1.15: DualSteer policy content and provisioning p. 92
6.1.15.1 Description p. 92
6.1.15.1.1 General Principle of Policy for DualSteer p. 92
6.1.15.1.2 Proposed solution of policy handling p. 94
6.1.15.1.3 Session management corresponding to the policy handling p. 97
6.1.15.2 Procedures p. 99
6.1.15.2.1 General p. 99
6.1.15.2.2 Procedure of provisioning polocies for DualSteer p. 99
6.1.15.2.3 Procedure of session management for DualSteer p. 100
6.1.15.3 Impacts on services, entities and interfaces p. 104
6.1.16 Solution #1.16: Access Selection Policy for selecting a registered UE for traffic transmission p. 105
6.1.16.1 Description p. 105
6.1.16.1.0 Introduction p. 105
6.1.16.1.1 New ASP policy for selecting a registered PLMN for DualSteer traffic transmission p. 106
6.1.16.2 Procedures p. 108
6.1.16.3 Impacts on services, entities and interfaces p. 109
6.1.17 Solution #1.17: URSP provisioning for DualSteer traffic steering p. 109
6.1.17.1 Description p. 109
6.1.17.2 Procedures p. 110
6.1.17.2.1 Information flow p. 110
6.1.17.2.2 Subscription data p. 111
6.1.17.3 Impacts on services, entities and interfaces p. 112
6.1.18 Solution #1.18: Policy for DualSteer steering and switching p. 112
6.1.18.1 Description p. 112
6.1.18.2 Procedures p. 115
6.1.18.2.1 Procedures for Policy for DualSteer Traffic Steering p. 115
6.1.18.2.2 Procedures for Policy for DualSteer Traffic Switching p. 116
6.1.18.3 Impacts on services, entities and interfaces p. 116
6.1.19 Solution #1.19: PDU Session Control for DualSteer p. 116
6.1.19.1 Description p. 116
6.1.19.2 Procedures p. 117
6.1.19.3 Impacts on services, entities and interfaces p. 118
6.2 Solutions for ATSSS_Ph4 p. 118
6.2.1 Solution #2.1: Policy Control for the MPQUIC Steering Functionality for non-UDP Traffic p. 118
6.2.1.1 Description p. 118
6.2.1.2 Procedure p. 120
6.2.1.3 Impacts on services, entities and interfaces p. 121
6.2.2 Solution #2.2: Ipsec establishment using null encryption with ePDG co-located in the UPF p. 122
6.2.2.1 Description p. 122
6.2.2.2 Procedures p. 122
6.2.2.3 Impacts on services, entities and interfaces p. 123
6.2.3 Solution #2.3: MPQUIC Steering Functionality extended with additional CONNECT methods p. 123
6.2.3.1 Description p. 123
6.2.3.2 Procedures p. 125
6.2.3.2.1 MA PDU Session Establishment p. 125
6.2.3.2.2 PDN Connections and Multi Access PDU Sessions p. 126
6.2.3.3 Impacts on services, entities and interfaces p. 127
6.2.4 Solution #2.4: MPQUIC steering functionality using IP proxying over HTTP p. 127
6.2.5 Solution #2.5: MPQUIC steering functionality using Ethernet proxying over HTTP p. 135
6.2.6 Solution #2.6: for KI#2.2 p. 142
6.2.6.0 Introduction p. 142
6.2.6.1 PDU Session establishment of Solution #2.6 p. 144
6.2.6.2 System impact p. 146
6.2.7 Solution #2.7: Architecture for ATSSS-Lite p. 146
6.2.7.1 Description p. 146
6.2.7.1.1 Introduction p. 146
6.2.7.1.2 Architecture without TNGF/N3IWF p. 146
6.2.7.1.3 Non-Integrated Non-3GPP Access and re-use of the MA PDU Session concept p. 147
6.2.7.1.4 Re-use of high layer steering functionality and traffic security p. 148
6.2.7.1.5 Protocol stacks connectivity via Non-3GPP p. 148
6.2.7.1.6 Re-use of steering modes, MPTCP/MQUIC measurements and extension URSP/ATSSS/N4 rules p. 149
6.2.7.2 Procedures p. 149
6.2.7.2.1 Option 1: ATSSS capable AMF p. 149
6.2.7.2.2 Option 2: ATSSS capable SMF supports ATSSS-Lite p. 151
6.2.7.2.3 Enhancements to MA PDU Session Modification p. 151
6.2.7.3 Impacts on services, entities and interfaces p. 152
6.2.8 Solution #2.8: Simplified ATSSS over non-3GPP based on direct MPQUIC connection between UE and UPF p. 152
6.2.8.1 Description p. 152
6.2.8.1.1 General p. 152
6.2.8.2 Procedures p. 153
6.2.8.2.1 General p. 153
6.2.8.2.2 Registration via 3GPP access p. 153
6.2.8.2.3 MA PDU Session Establishment via 3GPP access p. 154
6.2.8.2.4 Addition of non-3GPP access user-plane resources p. 156
6.2.8.2.5 Handling of the MA PDU Session in case the UE loses 3GPP access coverage p. 157
6.2.8.3 Impacts on services, entities and interfaces p. 158
6.2.9 Solution #2.9: MPQUIC Connect-IP/Ethernet over Ethernet PDU Session Type p. 159
6.2.9.1 Description p. 159
6.2.9.2 Procedures p. 161
6.2.9.3 Impacts on services, entities and interfaces p. 162
6.2.10 Solution #2.10: MPQUIC steering functionality using TCP proxying over HTTP p. 163
6.2.11 Solution #2.11: Coexistence between different proxying-over-HTTP solutions p. 170
6.2.11.1 Introduction p. 170
6.2.11.2 High-level Description p. 170
6.2.12 Solution #2.12: NULL Encryption IPSec User Plane Tunnelling for MA PDU Session using MPQUIC based steering and switching p. 171
6.2.12.1 Description p. 171
6.2.12.2 Procedures p. 171
6.2.12.3 Impacts on services, entities and interfaces p. 172
6.2.13 Solution #2.13: Eliminate IPSec tunnel for UP p. 172
6.2.13.1 Description p. 172
6.2.13.2 Procedures p. 172
6.2.13.3 Impacts on services, entities and interfaces p. 173
7 Overall Evaluation p. 173
8 Conclusions p. 176
8.1 Conclusions for DualSteer p. 176
8.2 Conclusions for ATSSS_Ph4 p. 176
$ Change history p. 178
