Content for TR 23.700-53 Word version: 18.0.0
5 Key Issues p. 10
5.1 Key Issue #2: New steering functionalities for non-TCP traffic p. 10
5.1.1 Description p. 10
5.2 Key Issue #3: Support of redundant traffic steering p. 11
5.2.1 Description p. 11
5.3 Key Issue #5: Switching traffic of an MA PDU Session between two non-3GPP access paths p. 12
5.3.1 Description p. 12
5.4 Key Issue #6: Supporting MA PDU Session with one 3GPP access path via 5GC and one non-3GPP access path via ePDG/EPC p. 13
5.4.1 Description p. 13
6 Solutions p. 14
6.0 Mapping of Solutions to Key Issues p. 14
6.1 Solution #3.1: New steering mode - Redundancy steering mode with packet loss rate p. 14
6.1.1 Introduction p. 14
6.1.2 High-level Description p. 14
6.2 Solution #6.1: Support non-3GPP access leg of MA-PDU Session with PDN connection in EPC p. 15
6.2.1 Introduction p. 15
6.2.2 High-level Description p. 15
6.2.3 Impacts on services, entities, interfaces and IETF protocols p. 17
6.3 Solution #2.1: MP-DCCP based Steering Functionality p. 17
6.3.1 Introduction p. 17
6.3.2 Description p. 17
6.3.3 MA PDU Session Establishment procedure p. 21
6.3.4 MA PDU Session Modification procedure p. 23
6.3.5 Example of MP-DCCP-LL Operation p. 23
6.3.6 Support of Steering Modes p. 26
6.3.7 Support of Re-Ordering p. 26
6.3.8 User-plane overhead p. 27
6.3.9 Co-existence with MPTCP and ATSSS-LL p. 27
6.3.10 Impacts on services, entities, interfaces and IETF protocols p. 27
6.4 Solution #3.2: Redundant traffic steering triggered by AF p. 28
6.4.1 Introduction p. 28
6.4.2 High-level Description p. 28
6.4.3 Procedures p. 29
6.4.3.0 General p. 29
6.4.3.1 Procedure of AF providing PLR threshold value via Nnef_TrafficInfluence_Create/Update operation service p. 29
6.4.3.2 Procedure of AF providing PLR threshold value via Nnef_AFsessionWithQoS_Create/Update operation service p. 30
6.4.4 Impacts on Existing Nodes and Functionality p. 31
6.5 Solution #3.3: New traffic duplication steering mode p. 31
6.5.1 Introduction p. 31
6.5.2 High-level Description p. 31
6.5.3 Procedures p. 33
6.5.3.1 AF providing traffic duplication parameters p. 33
6.5.3.2 Procedure of AF providing traffic duplication parameters via Nnef_TrafficInfluence_Create/Update service p. 34
6.5.4 Impacts on Existing Nodes and Functionality p. 34
6.6 Solution #3.4: Redundant steering mode with duplication information and trigger mechanisms p. 35
6.6.1 Introduction p. 35
6.6.2 High-level Description p. 35
6.6.2.1 Provision of RSM related parameters to UE and UPF p. 35
6.6.2.2 Triggering the usage of a MA PDU Session with RSM p. 36
6.6.3 Procedures p. 36
6.6.4 Impacts on Existing Nodes and Functionality p. 37
6.7 Solution #5.1: Support traffic switching between two non-3GPP paths p. 38
6.7.1 Introduction p. 38
6.7.2 High-level Description p. 38
6.7.3 Procedures p. 38
6.7.4 Impacts on Existing Nodes and Functionality p. 40
6.8 Solution #5.2: Delaying UDM Registration until non-3GPP access switching completes p. 41
6.8.1 Introduction p. 41
6.8.2 High-level Description p. 41
6.8.3 Procedures p. 41
6.8.4 Impacts on Existing Nodes and Functionality p. 43
6.9 Solution #5.3: Path switching between non-3GPP accesses p. 43
6.9.1 Introduction p. 43
6.9.2 High-level Description p. 43
6.9.3 Procedures p. 44
6.9.4 Impacts on Existing Nodes and Functionality p. 46
6.10 Solution #5.4: Non-3GPP access path switching in MA PDU Session p. 47
6.10.1 Introduction p. 47
6.10.2 High-level Description p. 47
6.10.3 MA PDU Session Access Path Switching procedure p. 48
6.10.4 Impacts on Existing Nodes and Functionality p. 49
6.11 Solution #2.2: MPQUIC steering functionality using UDP proxying over HTTP p. 50
6.11.1 Introduction p. 50
6.11.2 High-level Description p. 51
6.11.3 Procedures p. 54
6.11.4 User-plane overhead p. 58
6.11.5 Co-existence with MPTCP and ATSSS-LL p. 60
6.11.6 Handling of out-of-order delivery p. 61
6.11.7 Handling of duplicated packets p. 61
6.11.8 Impacts on Existing Nodes and Functionality p. 62
6.12 Solution #2.3: MPQUIC steering functionality using IP proxying over HTTP p. 62
6.12.1 Introduction p. 62
6.12.2 High-level Description p. 63
6.12.3 Procedures p. 66
6.12.4 User-plane overhead p. 70
6.12.5 Co-existence with MPTCP and ATSSS-LL p. 70
6.12.6 Handling of out-of-order delivery p. 70
6.12.7 Handling of duplicated packets p. 71
6.12.8 Impacts on Existing Nodes and Functionality p. 72
6.13 Solution #2.4: Limiting MA-PDU Per-Packet Overhead p. 72
6.13.1 Introduction p. 72
6.13.2 High Level Description p. 73
6.13.3 Procedures p. 73
6.13.4 Impacts on Existing Nodes and Functionality p. 74
6.14 Solution #3.5: Redundant Traffic Steering Mode Activation/Deactivation p. 74
6.14.1 Introduction p. 74
6.14.2 High Level Description p. 74
6.14.3 Procedures p. 76
6.14.4 Impacts on Existing Nodes and Functionality p. 77
6.15 Solution #3.6: Redundant steering mode p. 77
6.15.1 Introduction p. 77
6.15.2 High-level Description p. 77
6.15.3 Procedures p. 78
6.15.4 Impacts on Existing Nodes and Functionality p. 78
6.16 Solution #5.5: Non-3GPP path switch during Registration in new non-3GPP access p. 78
6.16.1 Introduction p. 78
6.16.2 High-level Description p. 78
6.16.3 Procedures p. 78
6.16.4 Impacts on Existing Nodes and Functionality p. 80
6.17 Solution #5.6: Consolidated solution for traffic switching between two non-3GPP access paths p. 81
6.17.1 Introduction p. 81
6.17.2 High-level Description p. 81
6.17.3 Procedures p. 81
6.17.4 Impacts on Existing Nodes and Functionality p. 83
6.18 Solution #3.7: Suspending the Redundancy Steering Mode p. 84
7 Evaluation p. 85
7.1 Evaluation for KI #2: New steering functionalities for non-TCP traffic p. 85
7.1.1 User Plane Performance Aspect p. 85
7.1.2 Summary of proposed steering functionalities p. 86
7.1.3 Evaluation of steering functionalities for UDP traffic flows p. 86
7.2 Evaluation for KI #3: Support of redundant traffic steering p. 91
7.2.1 Considerations on RSM with Duplication Criteria p. 91
7.2.2 Considerations on RSM without Duplication Criteria p. 91
7.2.3 Considerations on RSM suspension p. 91
7.3 Evaluation for KI #5: Switching traffic of an MA PDU Session between two non-3GPP access paths p. 91
7.4 Evaluation for KI #6: Support non-3GPP access leg of MA-PDU Session with PDN connection in EPC p. 96
8 Conclusions p. 97
8.1 Conclusions for KI #2: New steering functionalities for non-TCP traffic p. 97
8.2 Conclusions for KI #3: Support of redundant traffic steering p. 97
8.3 Conclusions for KI #5: Switching traffic of an MA PDU Session between two non-3GPP access paths p. 99
8.4 Conclusions for KI #6: Supporting MA PDU Session with one 3GPP access path via 5GC and one non-3GPP access path via ePDG/EPC p. 101
$ Change history p. 102
