Tech-invite  3GPPspace  IETFspace
◀  ▶  21  22  23  24  25  26  27  28  29  31  32  33  34  35  36  37  38  4‑5x
Top   in Index   Prev   Next

TR 23.700-33
Study on System enhancement for ProSe in the 5GS – Phase 2

3GPP‑Page   fToC↓   Partial Content →
V18.0.0 (Wzip)  2022/12  184 p.
Rapporteur:
Mr. Deng, Qiang
CATT

full Table of Contents for  TR 23.700-33  Word version:  18.0.0

each clause number in 'red' refers to the equivalent title in the Partial Content
Here   Top
1Scope  p. 11
2References  p. 11
3Definitions of terms and abbreviations  p. 12
3.1Terms  p. 12
3.2Abbreviations  p. 12
4Architecture Requirements and Assumptions  p. 12
4.1Architecture Requirements  p. 12
4.2Architecture Assumptions  p. 13
5Key Issues  p. 13
5.1Key Issue #1: Support of UE-to-UE Relay  p. 13
5.1.1General description  p. 13
5.2Key Issue #2: Support of path switching between two indirect network communication paths for UE-to-Network Relaying with service continuity consideration  p. 14
5.2.1General description  p. 14
5.3Key Issue #3: Support direct communication path switching between PC5 and Uu (i.e. non-relay case)  p. 15
5.3.1General description  p. 15
5.4Key Issue #4: Support of path switching between direct network communication path and indirect network communication path for Layer-2 UE-to-Network Relay with session continuity consideration  p. 16
5.4.1General description  p. 16
5.5Key Issue #5: Support of multi-path transmission for UE-to-Network Relay  p. 16
5.5.1General description  p. 16
5.6Key Issue #6: Support of PC5 Service Authorization and Policy/Parameter Provisioning  p. 17
5.6.1General description  p. 17
5.7Key Issue #7: Support of Emergency for UE-to-Network Relaying  p. 17
5.7.1General description  p. 17
6Solutions  p. 19
6.0Mapping of Solutions to Key Issues  p. 19
6.1Solution #1: UE-to-UE Relay Selection Without Relay Discovery  p. 20
6.1.1Description  p. 20
6.1.2Procedures  p. 21
6.1.2.1UE-to-UE relay discovery and selection is integrated into the unicast link establishment procedure (Alternative 1)  p. 21
6.1.2.2UE-to-UE relay discovery and selection is integrated into Model B direct discovery procedure (Alternative 2)  p. 22
6.1.3Impacts on services, entities and interfaces  p. 24
6.2Solution #2: ProSe 5G Layer-3 UE-to-UE Relay based on IP routing  p. 24
6.2.1Description  p. 24
6.2.2Procedures  p. 26
6.2.3Impacts on services, entities and interfaces  p. 26
6.3Solution #3: Stateful UE-to-UE Layer-2 or Layer-3 Relay for Public Safety  p. 26
6.3.1Introduction  p. 26
6.3.2Functional Description  p. 27
6.3.3Procedures  p. 27
6.3.3.1UE-to-UE Relay discovery  p. 27
6.3.3.1.1Model A  p. 27
6.3.3.1.2Model B  p. 28
6.3.3.2Communication via the stateful UE-to-UE Relay  p. 30
6.3.3.2.1General  p. 30
6.3.3.2.2Communication via stateful Layer-3 UE-to-UE Relay  p. 30
6.3.3.2.3Communication via stateful Layer-2 UE-to-UE Relay  p. 30
6.3.4Impacts on services, entities and interfaces  p. 31
6.4Solution #4: QoS control for UE-to-UE Relay  p. 31
6.4.1Description  p. 31
6.4.2Procedures for Layer 3 UE-to-UE Relay  p. 32
6.4.3Procedures for Layer 2 UE-to-UE Relay  p. 33
6.4.4Impacts on services, entities and interfaces  p. 34
6.5Solution #5: Support Layer-3 UE-to-UE Relay Based on IPv6 link-local addresses  p. 34
6.5.1Description  p. 34
6.5.2Procedures  p. 34
6.5.2.1Relay path establishment procedure  p. 34
6.5.2.2Path switch from one UE-to-UE relay to another UE-to-UE relay  p. 35
6.5.3Impacts on services, entities and interfaces  p. 36
6.6Solution #6: Support Layer-3 UE-to-UE Relay to Handle Non-IP Traffic  p. 37
6.6.1Description  p. 37
6.6.1.1General  p. 37
6.6.1.2QoS handling  p. 37
6.6.1.3Security  p. 38
6.6.2Procedures  p. 38
6.6.2.1Relay path establishment procedure  p. 38
6.6.2.2Layer-2 ID update procedure  p. 39
6.6.3Impacts on Existing Nodes and Functionality  p. 41
6.7Solution #7: Negotiated UE-to-UE Relay Reselection  p. 41
6.7.1Description  p. 41
6.7.2Procedures  p. 41
6.7.2.1Layer-2 based UE-to-UE Relay Re-selection  p. 42
6.7.2.2Layer-3 based UE-to-UE Relay Re-selection  p. 44
6.7.3Impacts on services, entities and interfaces  p. 46
6.8Solution #8: Authorization for 5G ProSe UE-to-UE Relay Service  p. 46
6.8.1Description  p. 46
6.8.2Procedures  p. 47
6.8.2.1Procedure Enhancement for Information Provisioning to a 5G ProSe Remote UE/UE-to-UE Relay  p. 47
6.8.2.2The Policy/parameter to a 5G ProSe UE-to-UE Relay  p. 47
6.8.2.3The Policy/parameter to a 5G ProSe Remote UE  p. 48
6.8.2.45G ProSe UE-to-UE Relay Discovery parameters  p. 49
6.8.2.5Procedures for Service Authorization related to UE-to-UE Relay operation to NG-RAN  p. 49
6.8.3Impacts on services, entities and interfaces  p. 49
6.9Solution #9: Model A discovery for 5G ProSe Layer-3 UE-to-UE Relay scenario  p. 50
6.9.1Description  p. 50
6.9.2Procedures  p. 51
6.9.3Impacts on services, entities and interfaces  p. 52
6.10Solution #10: Consolidated Solution for UE-to-UE Relay discovery and selection based on Model A and Model B discovery  p. 52
6.10.1Description  p. 52
6.10.2Procedures  p. 52
6.10.2.1Model A discovery  p. 52
6.10.2.2Model B discovery  p. 53
6.10.3Impacts on services, entities and interfaces  p. 55
6.11Solution #11: Consolidated Solution for Layer-3 UE-to-UE Relay communication setup after Model A and Model B discovery  p. 55
6.11.1Description  p. 55
6.11.2Procedures  p. 55
6.11.3Impacts on services, entities and interfaces  p. 57
6.12Solution #12: Layer-3 UE-to-UE Relay discovery and communication  p. 58
6.12.1Description  p. 58
6.12.2Procedures  p. 59
6.12.2.1Procedures for UE-to-UE Relay discovery  p. 59
6.12.2.1.1Procedure for UE-to-UE Relay discovery with Model A  p. 59
6.12.2.1.2Procedure for UE-to-UE Relay discovery with Model B  p. 60
6.12.2.2Procedures for UE-to-UE Relay communication  p. 61
6.12.3Impacts on services, entities and interfaces  p. 63
6.13Solution #13: Layer-2 UE-to-UE Relay  p. 63
6.13.1Description  p. 63
6.13.1.1General  p. 63
6.13.1.2Control and User Plane Protocol Stacks  p. 64
6.13.2Procedures  p. 64
6.13.3Impacts on services, entities and interfaces  p. 66
6.14Solution #14: Criteria for two indirect network path switches  p. 66
6.14.1Description  p. 66
6.14.2Criteria for path switching for 5G ProSe Layer-3 relay without N3IWF  p. 67
6.14.3Criteria for path switching for 5G ProSe Layer-3 relay with N3IWF  p. 67
6.14.4Criteria for path switching for 5G ProSe Layer-2 relay  p. 68
6.14.5Impacts on Existing Nodes and Functionality  p. 68
6.15Solution #15: Service continuity support for path switch between two indirect network communication paths  p. 68
6.15.1General Description  p. 68
6.15.2Procedures  p. 69
6.15.2.1Relay (re)selection  p. 69
6.15.2.2Service Continuity  p. 69
6.15.3Impacts on Existing Nodes and Functionality  p. 70
6.16Solution #16: Provisioning policy based direct communication path switching between PC5 and Uu reference points  p. 70
6.16.1Description  p. 70
6.16.2Procedures  p. 71
6.16.3Impacts on Existing Nodes and Functionality  p. 72
6.17Solution #17: Path switching between PC5 path and Uu path  p. 72
6.17.1Description  p. 72
6.17.2Procedures  p. 73
6.17.2.1Switching from PC5 to Uu path  p. 73
6.17.2.2Switching from Uu to PC5 path  p. 74
6.17.3Impacts on services, entities and interfaces  p. 75
6.18Solution #18: UE Negotiation-based path switching from PC5 to Uu  p. 75
6.18.1Description  p. 75
6.18.2Procedures for path switching from PC5 to Uu with negotiation  p. 76
6.18.3Procedures of deactivating path switching  p. 77
6.18.4Procedures for path switching from Uu to PC5 with negotiation  p. 77
6.18.5Impacts on Existing Nodes and Functionality  p. 78
6.19Solution #19: Path switching between PC5 and Uu reference points based on path permission policy  p. 78
6.19.1Description  p. 78
6.19.2Procedures  p. 79
6.19.2.1Path permission policy description  p. 79
6.19.2.2Path permission policy provision procedure  p. 79
6.19.2.3Path switching based on path permission policy procedure  p. 79
6.19.3Impacts on Existing Nodes and Functionality  p. 81
6.20Solution #20: Switching back from Uu path to PC5 path  p. 81
6.20.1Description  p. 81
6.20.2Procedures  p. 82
6.20.2.1Procedure for switch back from Uu path to PC5 path  p. 82
6.20.3Impacts on services, entities and interfaces  p. 83
6.21Solution #21: Support direct communication path switching between PC5 and Uu  p. 84
6.21.1Description  p. 84
6.21.2Procedures  p. 84
6.21.3Impacts on services, entities and interfaces  p. 85
6.22Solution #22: Direct Communication Path switching between PC5 and Uu  p. 86
6.22.1Description  p. 86
6.22.2Procedures  p. 86
6.22.2.1Direct Communication Path switching from PC5 to Uu  p. 86
6.22.2.2Direct Communication Path switching from Uu to PC5  p. 88
6.22.3Impacts on services, entities and interfaces  p. 89
6.23Solution #23: Session Continuity for path switching for L2 U2N Relay  p. 89
6.23.1Description  p. 89
6.23.2Procedures  p. 89
6.23.2.1Xn based inter-gNB indirect-to-direct path switching  p. 89
6.23.2.2Xn based inter-gNB direct-to-indirect path switching  p. 90
6.23.2.3N2 based inter-gNB indirect-to-direct path switching  p. 91
6.23.2.4N2 based inter-gNB direct-to-indirect path switching  p. 92
6.23.3Impacts on services, entities and interfaces  p. 94
6.24Solution #24: Service continuity support for path switch between direct network communication path and indirect network communication path for Layer-2 UE-to-Network Relay  p. 94
6.24.1General Description  p. 94
6.24.2Procedures  p. 95
6.24.2.1Relay (re)selection  p. 95
6.24.2.2Session Continuity  p. 95
6.24.3Impacts on Existing Nodes and Functionality  p. 96
6.25Solution #25: Authorization for Multi-path Transmission via UE-to-Network Relay and direct Uu using URSP  p. 96
6.25.1Description  p. 96
6.25.2Procedures  p. 96
6.25.2.1Procedure Enhancement for Multi-path Policy Provisioning to a 5G ProSe Remote UE  p. 96
6.25.2.2The Multi-path Policy to a 5G ProSe Remote UE using URSP  p. 98
6.25.2.3Using Multi-Path preference at UE  p. 100
6.25.3Impacts on services, entities and interfaces  p. 100
6.26Solution #26: Multi-path transmission via Layer-2 UE-to-Network Relay  p. 100
6.26.1Description  p. 100
6.26.2Procedures  p. 101
6.26.3Impacts on services, entities and interfaces  p. 101
6.27Solution #27: Remote UE traffic handling for Multi-Path with Layer-3 relay without N3IWF  p. 102
6.27.1Description  p. 102
6.27.2Procedure for Remote UE traffic handling for Multi-Path with Layer-3 relay without N3IWF  p. 103
6.27.2.1Establishment of multipath transmission using Layer-3 UE-to-Network Relay  p. 103
6.27.2.2Procedure  p. 104
6.27.3Impacts on Existing Nodes and Functionality  p. 107
6.28Solution #28: Multi-path transmission support for one direct path and one indirect network communication path  p. 108
6.28.1General Description  p. 108
6.28.2Procedures  p. 109
6.28.2.1Procedures for MA PDU sessions support for Layer-3 Remote UE  p. 109
6.28.3Impacts on Existing Nodes and Functionality  p. 110
6.29Solution #29: multi-path transmission for Layer-3 UE-to-Network Relay without N3IWF  p. 110
6.29.1Description  p. 110
6.29.1.1Overview  p. 110
6.29.1.2Policy for Multi-path Transmission via Layer-3 UE-to-Network Relay without N3IWF  p. 110
6.29.2Procedures  p. 111
6.29.2.2Procedure for Multi-path connection establishment via Layer-3 UE-to-Network Relay without N3IWF  p. 113
6.29.3Impacts on services, entities and interfaces  p. 114
6.30Solution #30: Layer-2 UE-to-UE Relaying  p. 114
6.30.1Description  p. 114
6.30.2Procedures  p. 114
6.30.2.1Procedures for UE-to-UE Relay discovery  p. 114
6.30.2.1.1Procedure for UE-to-UE Relay discovery with Model A  p. 114
6.30.2.1.2Procedure for UE-to-UE Relay discovery with Model B  p. 114
6.30.2.2Procedures for Layer-2 UE-to-UE Relay connection establishment  p. 115
6.30.3Impacts on services, entities and interfaces  p. 116
6.31Solution #31: ProSe 5G Layer-3 UE-to-UE Relay Authorization for IP address sharing  p. 116
6.31.1Introduction  p. 116
6.31.2Authorization for IP address sharing support  p. 117
6.31.2.1Function Description  p. 117
6.31.2.2Procedures  p. 117
6.31.3Impacts on services, entities and interfaces  p. 118
6.32Solution #32: Link Identifier Update procedure when using UE-to-UE Relay  p. 118
6.32.1Description  p. 118
6.32.2Layer-2 UE-to-UE Relay  p. 118
6.32.2.1Description  p. 118
6.32.2.2Procedures  p. 119
6.32.3Layer-3 UE-to-UE Relay  p. 121
6.32.3.1Description  p. 121
6.32.3.2Procedures  p. 121
6.32.4Impacts on services, entities and interfaces  p. 122
6.33Solution #33: Layer-2 UE-to-UE Relay discovery and communication  p. 123
6.33.1Description  p. 123
6.33.2Procedures  p. 124
6.33.2.1Procedures for UE-to-UE Relay discovery  p. 124
6.33.2.1.1Procedure for UE-to-UE Relay discovery with Model A  p. 124
6.33.2.1.2Procedure for UE-to-UE Relay discovery with Model B  p. 125
6.33.2.2Procedures for UE-to-UE Relay communication  p. 126
6.33.3Impacts on services, entities and interfaces  p. 128
6.34Solution #34: ProSe UE-to-UE relay support  p. 128
6.34.1General Description  p. 128
6.34.2Procedures  p. 129
6.34.2.1Route discovery  p. 129
6.34.2.1.1Model A route discovery  p. 129
6.34.2.1.2Model B route discovery  p. 130
6.34.2.25G ProSe UE-to-UE Relay Connection setup  p. 132
6.34.3Impacts on Existing Nodes and Functionality  p. 134
6.35Solution #35: Solution for path switching between two indirect network communication paths  p. 134
6.35.1Description  p. 134
6.35.2Procedures  p. 135
6.35.3Impacts on Existing Nodes and Functionality  p. 136
6.36Solution #36: Path switching between two indirect Layer-3 UE-to-Network Relay paths using N3IWF  p. 136
6.36.1Description  p. 136
6.36.2Protocol stacks  p. 136
6.36.3Path switching procedure  p. 137
6.36.4Impacts on services, entities and interfaces  p. 138
6.37Solution #37: Path switching of remote UE(s) having an indirect connection via a L2 UE-NW Relay  p. 138
6.37.1Description  p. 138
6.37.2Procedures  p. 139
6.37.3Impacts on services, entities and interfaces  p. 140
6.38Solution #38: Switching from direct network communication to indirect network communication  p. 140
6.38.1Description  p. 140
6.38.2Procedures  p. 141
6.38.3Impacts on services, entities and interfaces  p. 142
6.39Solution #39: Multi-path transmission for Layer-2 UE-to-Network Relay Using Redundant PDU Sessions  p. 142
6.39.1Description  p. 142
6.39.2Procedures  p. 143
6.39.3Impacts on Existing Nodes and Functionality  p. 143
6.40Solution #40: 5GC influenced multi-path transmission via Layer-2 UE-to-Network Relay  p. 144
6.40.1Description  p. 144
6.40.25GC influenced multi-path transmission procedure including L2 relay  p. 144
6.40.3Impacts on Existing Nodes and Functionality  p. 145
6.41Solution #41: Improve communication reliability with two-path transmission  p. 145
6.41.1Description  p. 145
6.41.2Procedures  p. 146
6.41.2.1Procedures for communication reliability  p. 146
6.41.3Impacts on services, entities and interfaces  p. 148
6.42Solution #42: Emergency Services for UE to Network Relaying  p. 149
6.42.1Description  p. 149
6.42.2Procedures  p. 150
6.42.3Impacts on services, entities and interfaces  p. 152
6.43Solution #43: Emergency Services over UE-to-Network Relay  p. 152
6.43.1Description  p. 152
6.43.2Procedures  p. 152
6.43.3Impacts on services, entities and interfaces  p. 154
6.44Solution #44: Emergency services for 5G ProSe Layer-3 UE-to-Network Relay without N3IWF  p. 154
6.44.1Introduction  p. 154
6.44.2Functional description  p. 154
6.44.3Procedures  p. 154
6.44.4Impacts on services, entities and interfaces  p. 155
6.45Solution #45: Solution for support of emergency service for U2N relay  p. 156
6.45.1Description  p. 156
6.45.2Principles for support of emergency service for U2N relay  p. 156
6.45.3Procedure to ensure emergency service via Layer-2 U2N relay  p. 157
6.45.4Procedure for Layer-3 U2N relay to avoid emergency service conflict  p. 158
6.45.5Impacts on Existing Nodes and Functionality  p. 158
6.46Solution #46: Emergency service via 5G ProSe Layer-3 UE-to-Network Relay with and without N3IWF  p. 158
6.46.1Description  p. 158
6.46.2Procedures  p. 159
6.46.2.1Procedures via 5G ProSe Layer-3 U2N relay without N3IWF  p. 159
6.46.2.2Procedures via 5G ProSe Layer-3 U2N relay with N3IWF  p. 160
6.46.3Impacts on services, entities and interfaces  p. 161
6.47Solution #47: Emergency call via 5G ProSe UE-to-Network Relay  p. 161
6.47.1Description  p. 161
6.47.2Procedures  p. 162
6.47.3Impacts on services, entities and interfaces  p. 163
6.48Solution #48: Emergency support via 5G ProSe Layer-3 UE-to-Network Relay  p. 163
6.48.1Description  p. 163
6.48.2Procedures  p. 164
6.48.3Impacts on services, entities and interfaces  p. 164
7Overall Evaluation  p. 165
7.1Key Issue #1: Support of UE-to-UE Relay  p. 165
7.2Key Issue #2: Support of path switching between two indirect network communication paths for UE-to-Network Relaying with service continuity consideration  p. 167
7.3Key Issue #3: Support direct communication path switching between PC5 and Uu (i.e. non-relay case)  p. 168
7.4Key Issue #4: Support of path switching between direct network communication path and indirect network communication path for Layer-2 UE-to-Network Relay with session continuity consideration  p. 168
7.5Key Issue #5: Support of multi-path transmission for UE-to-Network Relay  p. 169
7.6Key Issue #6: Support of PC5 Service Authorization and Policy/Parameter Provisioning  p. 170
7.7Key Issue #7: Support of Emergency for UE-to-Network Relaying  p. 170
8Conclusions  p. 174
8.1Key Issue #1: Support of UE-to-UE Relay  p. 174
8.2Key Issue #2: Support of path switching between two indirect network communication paths for UE-to-Network Relaying with service continuity consideration  p. 177
8.3Key Issue #3: Support direct communication path switching between PC5 and Uu (i.e. non-relay case)  p. 177
8.4Key Issue #4: Support of path switching between direct network communication path and indirect network communication path for Layer-2 UE-to-Network Relay with session continuity consideration  p. 178
8.5Key Issue #5: Support of multi-path transmission for UE-to-Network Relay  p. 178
8.6Key Issue #6: Support of PC5 Service Authorization and Policy/Parameter Provisioning  p. 179
8.7Key Issue #7: Support of Emergency for UE-to-Network Relaying  p. 179
ALayer-2 Architecture Reference Model  p. 182
A.1Introduction  p. 182
A.2Control and User Plane Protocols for Layer 2 UE-to-UE Relay  p. 182
A.2.1User Plane Protocol Stack  p. 182
A.2.2Control Plane Protocol Stack  p. 182
$Change history  p. 184

Up   Top