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TR 23.700-93
Study on Access Traffic Steering, Switch and Splitting support in the 5G System (5GS) architecture; Phase 2

3GPP‑Page   fToC↓   Partial Content →
V17.0.0 (Wzip)  2021/03  101 p.
Rapporteur:
Miss So, Tricci
ZTE Corporation

full Table of Contents for  TR 23.700-93  Word version:  17.0.0

each clause number in 'red' refers to the equivalent title in the Partial Content
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1Scope  p. 8
2References  p. 8
3Definitions of terms, symbols and abbreviations  p. 9
3.1Terms  p. 9
3.2Symbols  p. 9
3.3Abbreviations  p. 10
4Architectural Assumptions and Requirements  p. 10
4.1Architecture Assumptions  p. 10
4.2Architectural Requirements  p. 10
5Key Issues  p. 10
5.1Key issue #1: Additional Steering Modes  p. 11
5.1.1Description  p. 11
5.2Key issue #2: Additional Steering Functionalities  p. 11
5.2.1Description  p. 11
5.3Key Issue #3: Supporting MA PDU with 3GPP access leg over EPC and Non-3GPP access leg over 5GC  p. 12
5.3.1Description  p. 12
6Solutions  p. 12
6.0Mapping Solutions to Key Issues  p. 12
6.1Solution #1: QUIC-LL Steering Functionality  p. 13
6.1.1Introduction  p. 13
6.1.2MA PDU Session Establishment procedure  p. 16
6.1.3MA PDU Session Modification procedure  p. 18
6.1.4Example of QUIC-LL Operation  p. 18
6.1.4aAlternative User-Plane Operation  p. 21
6.1.5Support of Steering Modes  p. 22
6.1.6Impacts on services, entities, interfaces and IETF protocols  p. 23
6.2Solution #2: New steering mode - Autonomous steering mode  p. 24
6.2.1Introduction  p. 24
6.2.2High-level Description  p. 25
6.2.3Procedures  p. 25
6.2.4Impacts on services, entities, interfaces and IETF Protocols  p. 26
6.3Solution #3: New steering mode - Autonomous steering mode with advanced PMF  p. 26
6.3.1Introduction  p. 26
6.3.2High-level Description  p. 27
6.3.2.1Enhancement on link performance measurement  p. 27
6.3.2.2Thresholds for traffic steering/switching/splitting  p. 29
6.3.2.3Considerations to support per QoS flow measurement  p. 30
6.3.4Impacts on services, entities, interfaces and IETF Protocols  p. 31
6.4Solution #4: New steering mode - Redundant steering mode  p. 31
6.4.1Introduction  p. 31
6.4.2High-level Description  p. 31
6.4.3Impacts on services, entities, interfaces and IETF Protocols  p. 31
6.5Solution #5: Replacing 3GPP access leg of MA-PDU Session with PDN connection in EPC  p. 32
6.5.1Introduction  p. 32
6.5.2High-level Description  p. 32
6.5.3Procedures  p. 33
6.5.4Impacts on services, entities, interfaces and IETF Protocols  p. 34
6.6Solution #6: MPQUIC-LL Steering Functionality  p. 34
6.6.1Introduction  p. 34
6.6.2MA PDU Session Establishment procedure  p. 37
6.6.3MA PDU Session Modification procedure  p. 39
6.6.4Example of MPQUIC-LL Operation  p. 39
6.6.5Support of Steering Modes  p. 42
6.6.6Impacts on services, entities, interfaces and IETF protocols  p. 42
6.7Solution #7: Proposed solution based on MP-QUIC  p. 44
6.7.1Introduction  p. 44
6.7.2High-level Description  p. 44
6.7.2.1Transparent MP-QUIC proxy solution  p. 46
6.7.2.2aNon-Transparent QUIC proxy solution  p. 46
6.7.2.2bMP-QUIC connection per PDU Session  p. 47
6.7.3Procedures  p. 48
6.7.4Impacts on services, entities, interfaces and IETF protocols  p. 49
6.7.4.1Transparent MP-QUIC proxy solution  p. 49
6.7.4.2Non-transparent MP-QUIC proxy solution  p. 49
6.8Solution #8: Proposed solution based on QUIC  p. 50
6.8.1Introduction  p. 50
6.8.2High-level Description  p. 50
6.8.2.1Transparent QUIC proxy solution  p. 52
6.8.2.2Non-Transparent QUIC proxy solution  p. 54
6.8.3Procedure  p. 56
6.8.4Impacts on services, entities, interfaces and IETF protocols  p. 57
6.8.4.1Transparent QUIC proxy solution  p. 57
6.8.4.2Non-transparent QUIC proxy solution  p. 58
6.9Solution #9: Supporting a PDN connection in EPC as a 3GPP access leg of MA-PDU Session  p. 58
6.9.1Introduction  p. 58
6.9.2High-level Description  p. 58
6.9.3Procedures  p. 59
6.9.4Impacts on services, entities, interfaces and IETF Protocols  p. 59
6.10Solution #10: Extension of 5G RG solution to support Ethernet PDU Session types  p. 59
6.10.1Introduction  p. 59
6.10.2High-level Description  p. 59
6.10.3Procedures  p. 60
6.10.4Impacts on services, entities, interfaces and IETF protocols  p. 61
6.11Solution #11: Steering mode enhancements for handling - RTT differences  p. 61
6.11.1Introduction  p. 61
6.11.2High-level Description  p. 61
6.11.3Procedures  p. 62
6.11.3.1Establishment of MA PDU Session supporting RTT difference based steering mode  p. 62
6.11.4Impacts on services, entities, interfaces and IETF Protocols  p. 63
6.12Solution #12: New steering mode operation - UE assisted operation  p. 63
6.12.1Introduction  p. 63
6.12.2High-level Description  p. 63
6.12.3Procedures  p. 64
6.12.4Impacts on services, entities, interfaces and IETF Protocols  p. 65
6.13Solution #13: Proxy based solution using QUIC  p. 65
6.13.1Introduction  p. 65
6.13.2High-level Description  p. 66
6.13.2aAlternate user plane handling in the UE  p. 72
6.13.3Procedures  p. 73
6.13.3.1MA PDU Session Establishment  p. 73
6.13.3.2Proxy related signalling  p. 74
6.13.4Impacts on services, entities, interfaces and IETF protocols  p. 75
6.14Solution #14: Proxy based solution using MP-QUIC  p. 76
6.14.1Introduction  p. 76
6.14.2High-level Description  p. 76
6.14.3Procedures  p. 84
6.14.3.1MA PDU Session Establishment  p. 84
6.14.3.2Proxy related signalling  p. 85
6.14.4Impacts on services, entities, interfaces and IETF protocols  p. 85
6.15Solution #15: Enhancements to Load Balancing steering mode operation  p. 86
6.15.1Introduction  p. 86
6.15.2High-level Description  p. 86
6.15.3Procedures  p. 88
6.15.4Impacts on services, entities, interfaces and IETF Protocols  p. 88
7Evaluation  p. 88
7.1Evaluation for KI#1: Steering Modes  p. 89
7.2Evaluation for KI#2: Steering Functionality  p. 91
7.3Evaluation for KI #3: Supporting MA PDU with 3GPP access leg over EPC and Non-3GPP access leg over 5GC  p. 97
8Conclusions  p. 97
8.1Conclusions for KI#1: Steering Modes  p. 97
8.2Interim Conclusions for KI#2: Additional Steering Functionalities  p. 99
8.3Conclusion for KI#3: Supporting MA PDU with 3GPP access leg over EPC and Non-3GPP access leg over 5GC  p. 100
$Change history  p. 101

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