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TECHNICAL SPECIFICATION
5G;
5G System Enhancements for Edge Computing;
Stage 2
(3GPP TS 23.548 version 18.6.0 Release 18)
3GPP TS 23.548 version 18.6.0 Release 18 1 ETSI TS 123 548 V18.6.0 (2024-07)
Reference
RTS/TSGS-0223548vi60
Keywords
5G
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ETSI
3GPP TS 23.548 version 18.6.0 Release 18 2 ETSI TS 123 548 V18.6.0 (2024-07)
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Modal verbs terminology
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ETSI
3GPP TS 23.548 version 18.6.0 Release 18 3 ETSI TS 123 548 V18.6.0 (2024-07)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Abbreviations . 8
4 Reference Architecture and Connectivity Models . 8
4.1 General . 8
4.2 Reference Architecture for Supporting Edge Computing . 8
4.3 Connectivity Models . 10
5 Functional Description for Supporting Edge Computing . 11
5.1 EASDF . 11
5.1.1 Functional Description . 11
5.1.2 EASDF Discovery and Selection . 12
5.2 Edge DNS Client (EDC) Functionality . 12
5.2.1 Functional Description . 12
6 Procedures for Supporting Edge Computing . 13
6.1 General . 13
6.2 EAS Discovery and Re-discovery . 14
6.2.1 General . 14
6.2.2 EAS (Re-)discovery over Distributed Anchor Connectivity Model . 15
6.2.2.1 General . 15
6.2.2.2 EAS Discovery Procedure . 15
6.2.2.3 EAS Re-discovery Procedure at Edge Relocation . 15
6.2.2.4 Procedure for EAS Discovery with Dynamic PSA Distribution . 16
6.2.3 EAS (Re-)discovery over Session Breakout Connectivity Model . 18
6.2.3.1 General . 18
6.2.3.2 EAS Discovery Procedure . 18
6.2.3.2.1 General . 18
6.2.3.2.2 EAS Discovery Procedure with EASDF . 19
6.2.3.2.3 EAS Discovery Procedure with Local DNS Server/Resolver . 26
6.2.3.2.4 Select common DNAI with Local DNS Server/Resolver for a set of UEs . 28
6.2.3.2.5 Common EAS discovery with EASDF for a set of UEs . 28
6.2.3.2.6 EAS discovery corresponding to Common DNAI with EASDF for a set of UEs . 30
6.2.3.2.7 Coordination among SMFs for Common EAS/DNAI determination . 31
6.2.3.3 EAS Re-discovery Procedure at Edge Relocation . 32
6.2.3.4 EAS Deployment Information Management . 34
6.2.3.4.1 General . 34
6.2.3.4.2 EAS Deployment Information Provision from AF via NEF. 35
6.2.3.4.3 EAS Deployment Information Management in the SMF . 35
6.2.3.4.4 BaselineDNSPattern Management in the EASDF . 36
6.2.4 EDC Functionality based DNS Query to reach EASDF/DNS Resolver/DNS Server indicated by the
SMF . 37
6.3 Edge Relocation . 37
6.3.1 General . 37
6.3.2 Edge Relocation Involving AF Change . 38
6.3.3 Edge Relocation Using EAS IP Replacement . 38
6.3.3.1 EAS IP Replacement Procedures . 39
6.3.3.1.1 Enabling EAS IP Replacement Procedure by AF . 39
ETSI
3GPP TS 23.548 version 18.6.0 Release 18 4 ETSI TS 123 548 V18.6.0 (2024-07)
6.3.3.1.2 EAS IP Replacement Update upon DNAI and EAS IP Change . 40
6.3.3.1.3 Disabling EAS IP Replacement Procedure . 41
6.3.3.2 Enhancement to AF Influence . 41
6.3.4 AF Request for Simultaneous Connectivity over Source and Target PSA at Edge Relocation . 42
6.3.5 Packet Buffering for Low Packet Loss . 42
6.3.6 Edge Relocation Considering User Plane
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