Tech-invite  3GPPspace  IETFspace
◀  ▶  21  22  23  24  25  26  27  28  29  31  32  33  34  35  36  37  38  4‑5x
back to TS 23.548

Table of Contents for  TS 23.548  Word version:  19.4.0

1Scope  p. 7
2References  p. 7
3Definitions of terms, symbols and abbreviations  p. 7
3.1Terms  p. 7
3.2Abbreviations  p. 8
4Reference Architecture and Connectivity Models  p. 8
4.1General  p. 8
4.2Reference Architecture for Supporting Edge Computing  p. 8
4.3Connectivity Models  p. 11
5Functional Description for Supporting Edge Computing  p. 12
5.1EASDF  p. 12
5.1.1Functional Description  p. 12
5.1.2EASDF Discovery and Selection  p. 13
5.2Edge DNS Client (EDC) Functionality  p. 13
5.2.1Functional Description  p. 13
6Procedures for Supporting Edge Computing  p. 14
6.1General  p. 14
6.2EAS Discovery and Re-discovery  p. 14
6.2.1General  p. 14
6.2.2EAS (Re-)discovery over Distributed Anchor Connectivity Model  p. 16
6.2.2.1General  p. 16
6.2.2.2EAS Discovery Procedure  p. 16
6.2.2.3EAS Re-discovery Procedure at Edge Relocation  p. 16
6.2.2.4Procedure for EAS Discovery with Dynamic PSA Distribution  p. 17
6.2.3EAS (Re-)discovery over Session Breakout Connectivity Model  p. 19
6.2.3.1General  p. 19
6.2.3.2EAS Discovery Procedure  p. 19
6.2.3.2.1General  p. 19
6.2.3.2.2EAS Discovery Procedure with EASDF  p. 19
6.2.3.2.3EAS Discovery Procedure with Local DNS Server/Resolver  p. 27
6.2.3.2.4Select common DNAI with Local DNS Server/Resolver for a set of UEs |R18|  p. 29
6.2.3.2.5Common EAS discovery with EASDF for a set of UEs |R18|  p. 29
6.2.3.2.6EAS discovery corresponding to Common DNAI with EASDF for a set of UEs |R18|  p. 31
6.2.3.2.7Coordination among SMFs for Common EAS/DNAI determination |R18|  p. 32
6.2.3.3EAS Re-discovery Procedure at Edge Relocation  p. 33
6.2.3.4EAS Deployment Information Management  p. 35
6.2.3.4.1General  p. 35
6.2.3.4.2EAS Deployment Information Provision from AF via NEF  p. 37
6.2.3.4.3EAS Deployment Information Management in the SMF or I-SMF  p. 37
6.2.3.4.4BaselineDNSPattern Management in the EASDF  p. 38
6.2.4EDC Functionality based DNS Query to reach EASDF/DNS Resolver/DNS Server indicated by the SMF  p. 39
6.3Edge Relocation  p. 39
6.3.1General  p. 39
6.3.2Edge Relocation Involving AF Change  p. 40
6.3.3Edge Relocation Using EAS IP Replacement  p. 40
6.3.3.1EAS IP Replacement Procedures  p. 41
6.3.3.1.1Enabling EAS IP Replacement Procedure by AF  p. 41
6.3.3.1.2EAS IP Replacement Update upon DNAI and EAS IP Change  p. 42
6.3.3.1.3Disabling EAS IP Replacement Procedure  p. 43
6.3.3.2Enhancement to AF Influence  p. 43
6.3.4AF Request for Simultaneous Connectivity over Source and Target PSA at Edge Relocation  p. 44
6.3.5Packet Buffering for Low Packet Loss  p. 44
6.3.6Edge Relocation Considering User Plane Latency Requirement  p. 46
6.3.7Edge Relocation Triggered by AF  p. 46
6.4Network Exposure to Edge Application Server  p. 47
6.4.1General  p. 47
6.4.2Network Exposure to Edge Application Server  p. 47
6.4.2.1Usage of Nupf_EventExposure to Report QoS Monitoring results  p. 47
6.4.2.2Local NEF Discovery  p. 49
6.5Support of 3GPP Application Layer Architecture for Enabling Edge Computing  p. 49
6.5.1General  p. 49
6.5.2ECS Address Provisioning  p. 50
6.5.2.1ECS Address Configuration Information  p. 50
6.5.2.2ECS Address Configuration Information Provisioning to the UE  p. 50
6.5.2.3ECS Address Provisioning by a 3rd Party AF  p. 51
6.5.2.4ECS Address Provisioning by MNO  p. 51
6.5.2.5Interworking with EPC  p. 51
6.5.2.6ECS Address Provisioning in Roaming |R18|  p. 51
6.5.2.6.1General  p. 51
6.5.2.6.2ECS Address Configuration Information Provision from AF via NEF in VPLMN  p. 52
6.5.2.6.3ECS Address Configuration Information Provision to the SMF in VPLMN  p. 52
6.6Support of AF Guidance to PCF Determination of Proper URSP Rules  p. 53
6.7Support of the local traffic routing in VPLMN for Home Routed PDU Session for roaming (HR-SBO) |R18|  p. 54
6.7.1General  p. 54
6.7.2Procedure  p. 54
6.7.2.1General  p. 54
6.7.2.2PDU Session establishment for supporting HR-SBO in VPLMN  p. 55
6.7.2.3EAS Discovery Procedure with V-EASDF for HR-SBO  p. 58
6.7.2.4EAS Discovery Procedure with Local DNS for HR-SBO  p. 60
6.7.2.5EAS discovery procedure with V-EASDF/Local DNS Server using IP replacement mechanism for supporting HR-SBO  p. 61
6.7.2.6N2 Handover with V-SMF insertion/change/removal in HR-SBO case  p. 62
6.7.2.7Inter V-SMF mobility registration update procedure in HR-SBO case  p. 66
6.7.2.8N2 Handover without V-SMF change in HR-SBO case  p. 69
6.7.2.9Xn Handover with V-SMF change in HR-SBO case  p. 70
6.7.2.10Xn Handover without V-SMF change in HR-SBO case  p. 71
6.7.3EAS Re-discovery and Edge Relocation Procedure  p. 71
6.7.3.1General  p. 71
6.7.3.2Network triggered EAS change in HR-SBO context  p. 72
6.7.4AF request on PDU Sessions supporting HR-SBO  p. 73
6.8Support for mapping between EAS address Information and DNAI |R18|  p. 74
6.8.1General  p. 74
6.8.2AF request for DNAI Procedures  p. 75
6.9Use of N6 Delay Measurement |R19|  p. 75
6.10Support of the Local Offloading Management |R19|  p. 76
6.10.1General  p. 76
6.10.2Procedure  p. 76
6.10.2.1General  p. 76
6.10.2.2I-SMF insertion during the PDU Session establishment  p. 77
6.10.2.3EAS Discovery Procedure with EASDF for Local Offloading Management  p. 79
6.10.2.4UE mobility for PDU session supporting Local Offloading Management  p. 79
6.10.3Policy provisioning for Local Offloading Management  p. 80
6.10.3.1General  p. 80
6.10.3.2Local offloading management policy handling  p. 81
7Network Function Services and Descriptions  p. 81
7.1EASDF Services  p. 81
7.1.1General  p. 81
7.1.2Neasdf_DNSContext Service  p. 81
7.1.2.1General  p. 81
7.1.2.2Neasdf_DNSContext_Create Service Operation  p. 82
7.1.2.3Neasdf_DNSContext_Update Service Operation  p. 82
7.1.2.4Neasdf_DNSContext_Delete Service Operation  p. 82
7.1.2.5Neasdf_DNSContext_Notify Service Operation  p. 82
7.1.3Neasdf_BaselineDNSPattern Service  p. 83
7.1.3.1General  p. 83
7.1.3.2Neasdf_BaselineDNSPattern_Create Service Operation  p. 83
7.1.3.3Neasdf_BaselineDNSPattern_Update Service Operation  p. 83
7.1.3.4Neasdf_BaselineDNSPattern_Delete Service Operation  p. 83
AEAS Discovery Using 3rd Party Mechanisms  p. 84
BApplication Layer based EAS (Re-)Direction  p. 85
CConsiderations for EAS (re)Discovery  p. 86
C.1General  p. 86
C.2Impact of IP Addresses for DNS Resolver on UE  p. 86
C.3UE Considerations for EAS Re-discovery  p. 86
C.4UE Procedures for Session Breakout  p. 87
C.5Split-UE Considerations for EAS (Re-)discovery  p. 87
C.6Detection of UE not using 5GC provided DNS server  p. 87
DExamples of AF Guidance to PCF for Determination of URSP Rules  p. 89
EEPS Interworking Considerations  p. 90
E.1General  p. 90
E.2Distributed Anchor  p. 90
E.3Multiple Sessions  p. 90
E.4Session Breakout  p. 90
FEAS Relocation on Simultaneous Connectivity over Source and Target PSA  p. 91
$Change history  p. 94