Content for TR 23.700-49 Word version: 19.0.0
5 Key Issues p. 10
5.1 Key Issue #1: Enhancements for EAS (re)discovery and UPF (re)selection with reducing impact on central 5GC NFs p. 10
5.1.1 Description p. 10
5.2 Key Issue #2: Enhancement of EAS and local UPF (re)selection p. 11
5.2.1 Description p. 11
5.3 Key Issue #3: EC Traffic Routing between local part of DN and central part of DN p. 11
5.3.1 Description p. 11
6 Solutions p. 13
6.0 Mapping of Solutions to Key Issues p. 13
6.1 Solution #1: Edge computing handling by I-SMF p. 13
6.1.1 Key Issue mapping p. 13
6.1.2 Functional Description p. 13
6.1.3 Procedures p. 14
6.1.3.a I-SMF Insertion Procedure p. 14
6.1.3.b Processing AF requests for offloading policy create/update for I-SMF p. 16
6.1.3.c EDI for local network Management in the I-SMF p. 16
6.1.4 Impacts on existing services, entities and interfaces p. 16
6.2 Solution #2: Edge computing handling by local SMF p. 17
6.2.1 Key Issue mapping p. 17
6.2.2 Functional Description p. 17
6.2.3 Procedures p. 18
6.2.4 Impacts on existing services, entities and interfaces p. 19
6.3 Solution #3: Reducing impact of DNS message handling on central SMF for EAS (re)discovery based on offload to L-SMF p. 19
6.3.1 Key Issue mapping p. 19
6.3.2 General Description p. 19
6.3.3 Procedures p. 20
6.3.3.1 EAS Deployment Information and BaselineDNSPattern Management in the EASDF by L-SMF p. 20
6.3.3.2 EAS discovery procedure with EASDF p. 22
6.3.3.3 EAS discovery procedure with Local DNS Server/Resolver p. 24
6.3.3.4 EAS rediscovery at Edge Relocation p. 24
6.3.3.5 Mobility Handling p. 25
6.3.4 Impacts on services, entities and interfaces p. 25
6.4 Solution #4: Enhanced EC Architecture with SMF selecting local SMF storing EC related information p. 26
6.4.1 Key Issue mapping p. 26
6.4.2 Description p. 26
6.4.3 Procedures p. 27
6.4.3.1 Local SMF and Local PSA insertion procedure (new) p. 27
6.4.3.2 Local SMF and Local PSA Removal procedure (new) p. 28
6.4.3.3 EAS Discovery with EASDF procedure p. 29
6.4.3.4 EAS Rediscovery procedure p. 30
6.4.4 Impacts on services, entities and interfaces p. 30
6.5 Solution #5: Enhanced EC architecture with AMF selecting local SMF p. 30
6.5.1 Key Issue mapping p. 30
6.5.2 Description p. 30
6.5.3 Procedures p. 32
6.5.3.1 PDU Session Establishment/EAS discovery with local offloading control and local SMF p. 32
6.5.3.2 Handling local SMF notification service toward the AF p. 33
6.5.4 Impacts on services, entities and interfaces p. 34
6.6 Solution #6: Local management of EAS Deployment Information with local SMF p. 35
6.6.1 Key Issue mapping p. 35
6.6.2 Description p. 35
6.6.3 Procedures p. 35
6.6.3.1 Provisioning EAS Deployment Information to local SMF without involvement of SMF p. 35
6.6.3.2 Provisioning EAS Deployment Information to local SMF with involvement of SMF p. 36
6.6.4 Impacts on services, entities and interfaces p. 37
6.7 Solution #7: EAS deployment information report from L-SMF/L-UPF p. 37
6.7.1 Description p. 37
6.7.2 Procedures p. 38
6.7.2.1 No L-SMF insertion p. 38
6.7.2.2 L-SMF insertion after the I-SMF p. 39
6.7.2.3 L-SMF insertion after the SMF p. 40
6.7.3 Impacts on services, entities and interfaces p. 41
6.8 Solution #8: Selecting an EAS server leveraging analytics p. 41
6.8.1 Key Issue mapping p. 41
6.8.2 Description p. 41
6.8.3 Procedures p. 42
6.8.4 Impacts on services, entities and interfaces p. 44
6.9 Solution #9: local UPF and EAS (re)selection jointly considering N6 delay and EAS load p. 45
6.9.1 Description p. 45
6.9.3 Procedures p. 45
6.9.3.1 Enhancement on EAS Deployment Information Management p. 45
6.9.3.2 EAS/L-PSA discovery procedure with EASDF p. 45
6.9.3.3 EAS/L-PSA rediscovery at Edge Relocation p. 47
6.9.4 Impacts on services, entities and interfaces p. 49
6.10 Solution #10: L-PSA and EAS (re)selection based on N6 one-way and two-way delay measurement p. 49
6.10.1 Key Issue mapping p. 49
6.10.2 Functional Description p. 49
6.10.3 Procedures p. 51
6.10.4 Impacts on existing services, entities and interfaces p. 53
6.11 Solution #11: Provision weight factor of DNAIs from AF p. 53
6.11.1 Description p. 53
6.11.2 Procedures p. 54
6.11.3 Impacts on services, entities and interfaces p. 55
6.12 Solution #12: NWDAF and SMF-based EAS and local UPF (re)selection p. 55
6.12.1 Key Issue mapping p. 55
6.12.2 Description p. 55
6.12.3 Procedures p. 55
6.12.3.1 NWDAF and SMF-based EAS and local UPF (re)selection p. 55
6.12.3.2 N6 delay measurement and reporting p. 57
6.12.4 Impacts on services, entities and interfaces p. 57
6.13 Solution #13: EAS Discovery taking account of EAS load in EASDF p. 58
6.13.1 Key Issue mapping p. 58
6.13.2 Description p. 58
6.13.3 Procedures p. 60
6.13.4 Impacts on services, entities and interfaces p. 60
6.14 Solution #14: EAS selection considering DNS historical handling records p. 60
6.14.1 Key Issue mapping p. 60
6.14.2 Description. p. 60
6.14.3 Procedures p. 61
6.14.4 Impacts on services, entities and interfaces p. 62
6.15 Solution #15: The local EASDF assist for the EAS and local UPF (re)selection based on the AF provided N6 delay and EAS load information p. 62
6.15.1 Description p. 62
6.15.2 Procedures p. 63
6.15.3 Impacts on Existing Nodes and Functionality p. 64
6.16 Solution #16: Local UPF and EAS (re)selection considering access network delay and N6 delay information by 5GC or AF p. 65
6.16.1 Key Issue mapping p. 65
6.16.2 Description p. 65
6.16.3 Procedures p. 66
6.16.4 Impacts on services, entities and interfaces p. 71
6.17 Solution #17: EC Traffic Routing between local part of DN and central part of DN with IP replacement in EAS p. 72
6.17.1 Key Issue mapping p. 72
6.17.2 Description p. 72
6.17.3 Procedures p. 74
6.17.4 Impacts on services, entities and interfaces p. 75
6.18 Solution 18: Supporting traffic routing between local DN and central DN within a PDU Session p. 76
6.18.1 Description p. 76
6.18.2 Procedures p. 77
6.18.3 Impacts on services, entities and interfaces p. 78
6.19 Solution #19: Traffic Routing between local DN and central DN over session breakout model p. 79
6.19.1 Key Issue mapping p. 79
6.19.2 Description p. 79
6.19.3 Procedures p. 80
6.19.4 Impacts on services, entities and interfaces p. 81
6.20 Solution #20: EC Traffic Routing between local part of DN and central part of DN via PDU session p. 81
6.20.1 Key Issue mapping p. 81
6.20.2 Description p. 81
6.20.3 Procedures p. 83
6.20.4 Impacts on services, entities and interfaces p. 85
6.21 Solution #21: Solution to traffic routing between local and central part of DN via tunnel(s) p. 85
6.21.1 Description p. 85
6.21.1.1 Overall architecture of the solution p. 85
6.21.1.2 AF control of the connectivity between different DN parts p. 86
6.21.2 Procedures p. 87
6.21.2.1 Procedure to establish the tunnel between different DN parts using EDI p. 87
6.21.2.2 Procedure to establish the tunnel between different DN parts using request by AF p. 91
6.21.2.3 QoS handling of the tunnel between different DN parts p. 92
6.21.3 Impacts on existing nodes and functionality p. 93
6.22 Solution #22: Establishment of connectivity between the local DN and central part of DN based on OAM p. 93
6.22.1 Key Issue mapping p. 93
6.22.2 Description p. 93
6.22.3 Procedures p. 94
6.22.4 Impacts on services, entities and interfaces p. 95
6.23 Solution #23: Traffic steering between different parts of a DN p. 95
6.23.1 Key Issue mapping p. 95
6.23.2 Description. p. 95
6.23.3 Procedures p. 95
6.23.4 Impacts on services, entities and interfaces p. 97
6.24 Solution #24: Support traffic routing between local-DN and central-DN via the existing UP path of the PDU session and IP replacement p. 97
6.24.1 Key Issue mapping p. 97
6.24.2 General Description p. 97
6.24.3 Procedures p. 99
6.24.4 Impacts on services, entities and interfaces p. 100
6.25 Solution #25: EC Traffic Routing between local part of DN and central part of DN with UE IP address within IP header p. 101
6.25.1 Key Issue mapping p. 101
6.25.2 Description p. 101
6.25.3 Procedures p. 102
6.25.4 Impacts on services, entities and interfaces p. 103
6.26 Solution #26: Solution on Enhancements for EAS (re)discovery and UPF (re)selection with reducing impact on central 5GC NFs p. 103
7 Overall Evaluation p. 106
8 Conclusions p. 107
$ Change history p. 109
