ETSI TS 123 501 V16.15.0 (2023-01)

5G; System architecture for the 5G System (5GS) (3GPP TS 23.501 version 16.15.0 Release 16)

RTS/TSGS-0223501vgf0

General Information

• Status: Not Published
• Technical Committee: 3GPP SA 2 - Architecture
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Completion Date: 06-Jan-2023

Standards Content (Sample)

ETSI TS 123 501 V16.15.0 (2023-01)






TECHNICAL SPECIFICATION
5G;
System architecture for the 5G System (5GS)
(3GPP TS 23.501 version 16.15.0 Release 16)

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3GPP TS 23.501 version 16.15.0 Release 16 1 ETSI TS 123 501 V16.15.0 (2023-01)

Reference
RTS/TSGS-0223501vgf0
Keywords
5G
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ETSI

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3GPP TS 23.501 version 16.15.0 Release 16 2 ETSI TS 123 501 V16.15.0 (2023-01)
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3GPP TS 23.501 version 16.15.0 Release 16 3 ETSI TS 123 501 V16.15.0 (2023-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 16
1 Scope . 17
2 References . 17
3 Definitions and abbreviations . 22
3.1 Definitions . 22
3.2 Abbreviations . 26
4 Architecture model and concepts . 29
4.1 General concepts . 29
4.2 Architecture reference model . 29
4.2.1 General . 29
4.2.2 Network Functions and entities . 30
4.2.3 Non-roaming reference architecture . 31
4.2.4 Roaming reference architectures . 34
4.2.5 Data Storage architectures . 38
4.2.5a Radio Capabilities Signalling optimisatio n . 39
4.2.6 Service-based interfaces . 40
4.2.7 Reference points . 40
4.2.8 Support of non-3GPP access . 42
4.2.8.0 General . 42
4.2.8.1 General Concepts to Support Trusted and Untrusted Non-3GPP Access . 42
4.2.8.1A General Concepts to support Wireline Access . 44
4.2.8.2 Architecture Reference Model for Trusted and Untrusted Non-3GPP Accesses . 44
4.2.8.2.1 Non-roaming Architecture . 44
4.2.8.2.2 LBO Roaming Architecture . 45
4.2.8.2.3 Home-routed Roaming Architecture . 48
4.2.8.3 Reference Points for Non-3GPP Access . 50
4.2.8.3.1 Overview . 50
4.2.8.3.2 Requirements on Ta . 50
4.2.8.4 Architecture Reference Model for Wireline Access network. 51
4.2.8.5 Access to 5GC from devices that do not support 5GC NAS over WLAN access . 52
4.2.8.5.1 General . 52
4.2.8.5.2 Reference Architecture . 53
4.2.8.5.3 Network Functions . 53
4.2.8.5.4 Reference Points . 53
4.2.9 Network Analytics architecture . 54
4.2.10 Architecture Reference Model for ATSSS Support . 54
4.3 Interworking with EPC . 55
4.3.1 Non-roaming architecture . 55
4.3.2 Roaming architecture . 56
4.3.3 Interworking between 5GC via non-3GPP access and E-UTRAN connected to EPC . 58
4.3.3.1 Non-roaming architecture . 58
4.3.3.2 Roaming architecture . 59
4.3.4 Interworking between ePDG connected to EPC and 5GS . 61
4.3.4.1 Non-roaming architecture . 61
4.3.4.2 Roaming architectures . 62
4.3.5 Service Exposure in Interworking Scenarios . 64
4.3.5.1 Non-roaming architecture . 64
4.3.5.2 Roaming architectures . 65
4.4 Specific services . 66
4.4.1 Public Warning System . 66
4.4.2 SMS over NAS . 66
ETSI

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3GPP TS 23.501 version 16.15.0 Release 16 4 ETSI TS 123 501 V16.15.0 (2023-01)
4.4.2.1 Architecture to support SMS over NAS . 66
4.4.2.2 Reference point to support SMS over NAS . 68
4.4.2.3 Service based interface to support SMS over NAS . 68
4.4.3 IMS support . 68
4.4.4 Location services . 68
4.4.4.1 Architecture to support Location Services . 68
4.4.4.2 Reference point to support Location Services . 68
4.4.4.3 Service Based Interfaces to support Location Services . 68
4.4.5 Application Triggering Services . 69
4.4.6 5G LAN-type Services . 69
4.4.6.1 User plane architecture to support 5G LAN-type service . 69
4.4.6.2 Reference points to support 5G LAN-type service . 69
4.4.7 MSISDN-less MO SMS Service . 69
4.4.8 Time Sensitive Communication . 70
4.4.8.1 General . 70
4.4.8.2 Architecture to support Time Sensitive Communication . 70
5 High level features. 71
5.1 General . 71
5.2 Network Access Control . 71
5.2.1 General . 71
5.2.2 Network selection . 72
5.2.3 Identification and authentication . 72
5.2.4 Authorisation . 72
5.2.5 Access control and barring . 72
5.2.6 Policy control . 73
5.2.7 Lawful Interception. 73
5.3 Registration and Connection Management . 73
5.3.1 General . 73
5.3.2 Registration Management . 73
5.3.2.1 General . 73
5.3.2.2 5GS Registration Management states. 73
5.3.2.2.1 General . 73
5.3.2.2.2 RM-DEREGISTERED state . 73
5.3.2.2.3 RM-REGISTERED state . 74
5.3.2.2.4 5GS Registration Management State models . 75
5.3.2.3 Registration Area management . 75
5.3.2.4 Support of a UE registered over both 3GPP and Non-3GPP access . 76
5.3.3 Connection Management . 78
5.3.3.1 General . 78
5.3.3.2 5GS Connection Management states . 78
5.3.3.2.1 General . 78
5.3.3.2.2 CM-IDLE state . 78
5.3.3.2.3 CM-CONNECTED state . 79
5.3.3.2.4 5GS Connection Management State models . 79
5.3.3.2.5 CM-CONNECTED with RRC Inactive state . 80
5.3.3.3 NAS signalling connection management . 82
5.3.3.3.1 General . 82
5.3.3.3.2 NAS signalling connection establishment . 82
5.3.3.3.3 NAS signalling connection Release. 82
5.3.3.4 Support of a UE connected over both 3GPP and Non-3GPP access . 82
5.3.4 UE Mobility . 83
5.3.4.1 Mobility Restrictions . 83
5.3.4.1.1 General . 83
5.3.4.1.2 Management of Service Area Restrictions . 85
5.3.4.2 Mobility Pattern . 86
5.3.4.3 Radio Resource Management functions . 86
5.3.4.4 UE mobility event notification . 87
5.4 3GPP access specific aspects. 88
5.4.1 UE reachability in CM-IDLE. 88
5.4.1.1 General . 88
5.4.1.2 UE reachability allowing mobile terminated data while the UE is CM-IDLE . 89
ETSI

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3GPP TS 23.501 version 16.15.0 Release 16 5 ETSI TS 123 501 V16.15.0 (2023-01)
5.4.1.3 Mobile Initiated Connection Only (MICO) mode . 89
5.4.2 UE reachability in CM-CONNECTED. 90
5.4.3 Paging strategy handling . 90
5.4.3.1 General . 90
5.4.3.2 Paging Policy Differentiation . 91
5.4.3.3 Paging Priority . 91
5.4.4 UE Radio Capability handling . 92
5.4.4.1 UE radio capability information storage in the AMF . 92
5.4.4.1a UE radio capability signalling optimisation (RACS) . 93
5.4.4.2 Void. 96
5.4.4.2a UE Radio Capability Match Request . 96
5.4.4.3 Paging assistance information . 97
5.4.4a UE MM Core Network Capability handling . 97
5.4.4b UE 5GSM Core Network Capability handling . 98
5.4.5 DRX (Discontinuous Reception) framework . 98
5.4.6 Core Network assistance information for RAN optimization . 99
5.4.6.1 General . 99
5.4.6.2 Core Network assisted RAN parameters tuning . 99
5.4.6.3 Core Network assisted RAN paging information . 100
5.4.7 NG-RAN location reporting . 100
5.4.8 Support for identification and restriction of using unlicensed spectrum . 101
5.4.9 Wake Up Signal Assistance . 102
5.4.9.1 General . 102
5.4.9.2 Group Wake Up Signal . 102
5.5 Non-3GPP access specific aspects . 102
5.5.0 General . 102
5.5.1 Registration Management . 103
5.5.2 Connection Management . 103
5.5.3 UE Reachability . 104
5.5.3.1 UE reachability in CM-IDLE . 104
5.5.3.2 UE reachability in CM-CONNECTED . 105
5.6 Session Management . 105
5.6.1 Overview . 105
5.6.2 Interaction between AMF and SMF . 108
5.6.3 Roaming . 110
5.6.4 Single PDU Session with multiple PDU Session Anchors .
...