ETSI TS 123 501 V15.9.0 (2020-03)

5G; System architecture for the 5G System (5GS) (3GPP TS 23.501 version 15.9.0 Release 15)

RTS/TSGS-0223501vf90

General Information

• Status: Published
• Publication Date: 30-Mar-2020
• Technical Committee: 3GPP SA 2 - Architecture
• Current Stage: 12 - Completion
• Completion Date: 31-Mar-2020

Standards Content (Sample)

ETSI TS 123 501 V15.9.0 (2020-03)






TECHNICAL SPECIFICATION
5G;
System architecture for the 5G System (5GS)
(3GPP TS 23.501 version 15.9.0 Release 15)

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3GPP TS 23.501 version 15.9.0 Release 15 1 ETSI TS 123 501 V15.9.0 (2020-03)



Reference
RTS/TSGS-0223501vf90
Keywords
5G
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3GPP TS 23.501 version 15.9.0 Release 15 2 ETSI TS 123 501 V15.9.0 (2020-03)
Intellectual Property Rights
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ETSI

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3GPP TS 23.501 version 15.9.0 Release 15 3 ETSI TS 123 501 V15.9.0 (2020-03)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 12
1 Scope . 13
2 References . 13
3 Definitions and abbreviations . 16
3.1 Definitions . 16
3.2 Abbreviations . 18
4 Architecture model and concepts . 20
4.1 General concepts . 20
4.2 Architecture reference model . 21
4.2.1 General . 21
4.2.2 Network Functions and entities . 21
4.2.3 Non-roaming reference architecture . 22
4.2.4 Roaming reference architectures . 25
4.2.5 Data Storage architectures . 27
4.2.6 Service-based interfaces . 29
4.2.7 Reference points . 29
4.2.8 Support of non-3GPP access . 31
4.2.8.1 General Concepts to Support Non-3GPP Access . 31
4.2.8.2 Architecture Reference Model for Non-3GPP Accesses . 32
4.2.8.2.1 Non-roaming Architecture for Non-3GPP Accesses . 32
4.2.8.2.2 LBO Roaming Architecture for Non-3GPP Accesses, N3IWF in same PLMN as 3GPP access . 32
4.2.8.2.3 Home-routed Roaming Architecture for Non-3GPP Accesses, N3IWF in same PLMN as
3GPP access . 33
4.2.8.2.4 LBO Roaming Architecture for Non-3GPP Accesses, N3IWF in different PLMN from 3GPP
access . 34
4.2.8.2.5 Home-routed Roaming Architecture for Non-3GPP Accesses, N3IWF in different PLMN
from 3GPP access . 35
4.2.8.3 Non-3GPP Access Reference Points . 36
4.2.9 Network Analytics architecture . 36
4.3 Interworking with EPC . 37
4.3.1 Non-roaming architecture . 37
4.3.2 Roaming architecture . 38
4.3.3 Interworking between 5GC via non-3GPP access and E-UTRAN connected to EPC . 39
4.3.3.1 Non-roaming architecture . 39
4.3.3.2 Roaming architecture . 40
4.3.4 Interworking between ePDG connected to EPC and 5GS . 42
4.3.4.1 Non-roaming architecture . 42
4.3.4.2 Roaming architectures . 43
4.4 Specific services . 45
4.4.1 Public Warning System . 45
4.4.2 SMS over NAS . 45
4.4.2.1 Architecture to support SMS over NAS . 45
4.4.2.2 Reference point to support SMS over NAS . 47
4.4.2.3 Service based interface to support SMS over NAS . 47
4.4.3 IMS support . 47
4.4.4 Location services . 48
4.4.4.1 Architecture to support Location Services . 48
4.4.4.2 Reference point to support Location Services . 48
4.4.4.3 Service Based Interfaces to support Location Services . 49
4.4.5 Application Triggering Services . 49
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3GPP TS 23.501 version 15.9.0 Release 15 4 ETSI TS 123 501 V15.9.0 (2020-03)
5 High level features. 49
5.1 General . 49
5.2 Network Access Control . 49
5.2.1 General . 49
5.2.2 Network selection . 49
5.2.3 Identification and authentication . 50
5.2.4 Authorisation . 50
5.2.5 Access control and barring . 50
5.2.6 Policy control . 51
5.2.7 Lawful Interception. 51
5.3 Registration and Connection Management . 51
5.3.1 General . 51
5.3.2 Registration Management . 51
5.3.2.1 General . 51
5.3.2.2 5GS Registration Management states. 51
5.3.2.2.1 General . 51
5.3.2.2.2 RM-DEREGISTERED state . 51
5.3.2.2.3 RM-REGISTERED state . 52
5.3.2.2.4 5GS Registration Management State models . 52
5.3.2.3 Registration Area management . 53
5.3.2.4 Support of a UE registered over both 3GPP and Non-3GPP access . 53
5.3.3 Connection Management . 55
5.3.3.1 General . 55
5.3.3.2 5GS Connection Management states . 55
5.3.3.2.1 General . 55
5.3.3.2.2 CM-IDLE state . 55
5.3.3.2.3 CM-CONNECTED state . 56
5.3.3.2.4 5GS Connection Management State models . 56
5.3.3.2.5 CM-CONNECTED with RRC Inactive state . 57
5.3.3.3 NAS signalling connection management . 59
5.3.3.3.1 General . 59
5.3.3.3.2 NAS signalling connection establishment . 59
5.3.3.3.3 NAS signalling connection Release. 59
5.3.3.4 Support of a UE connected over both 3GPP and Non-3GPP access . 59
5.3.4 UE Mobility . 60
5.3.4.1 Mobility Restrictions . 60
5.3.4.1.1 General . 60
5.3.4.1.2 Management of Service Area Restrictions . 61
5.3.4.2 Mobility Pattern . 62
5.3.4.3 Radio Resource Management functions . 62
5.3.4.4 UE mobility event notification . 63
5.4 3GPP access specific aspects. 64
5.4.1 UE reachability in CM-IDLE. 64
5.4.1.1 General . 64
5.4.1.2 UE reachability allowing mobile terminated data while the UE is CM-IDLE . 65
5.4.1.3 Mobile Initiated Connection Only (MICO) mode . 65
5.4.2 UE reachability in CM-CONNECTED. 66
5.4.3 Paging strategy handling . 66
5.4.3.1 General . 66
5.4.3.2 Paging Policy Differentiation . 66
5.4.3.3 Paging Priority . 67
5.4.4 UE Radio Capability handling . 67
5.4.4.1 UE radio capability information storage in the AMF . 67
5.4.4.2 Void. 68
5.4.4.2a UE Radio Capability Match Request . 68
5.4.4.3 Paging assistance information . 68
5.4.4a UE MM Core Network Capability handling . 69
5.4.4b UE 5GSM Core Network Capability handling . 69
5.4.5 DRX (Discontinuous Reception) framework . 69
5.4.6 Core Network assistance information for RAN optimization . 70
5.4.6.1 General . 70
5.4.6.2 Core Network assisted RAN parameters tuning . 70
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3GPP TS 23.501 version 15.9.0 Release 15 5 ETSI TS 123 501 V15.9.0 (2020-03)
5.4.6.3 Core Network assisted RAN paging information . 70
5.4.7 NG-RAN location reporting . 71
5.5 Non-3GPP access specific aspects . 71
5.5.1 Registration Management . 71
5.5.2 Connection Management . 72
5.5.3 UE Reachability . 72
5.5.3.1 UE reachability in CM-IDLE . 72
5.5.3.2 UE reachability in CM-CONNECTED . 73
5.6 Session Management . 73
5.6.1 Overview . 73
5.6.2 Interaction between AMF and SMF . 75
5.6.3 Roaming . 76
5.6.4 Single PDU Session with multiple PDU Session Anchors . 77
5.6.4.1 General . 77
5.6.4.2 Usage of an UL Classifier for a PDU Session . 77
5.6.4.3 Usage of IPv6 multi-homing for a PDU Session. 78
5.6.5 Support for Local Area Data Network . 80
5.6.6 Secondary authentication/authorization by a DN-AAA server during the establishment of a PDU
Session . 82
5.6.7 Application Function influence on traffic routing . 83
5.6.8 Selective activation and deactivation of UP connection of existing PDU Session . 88
5.6.9 Session and Service Continuity . 89
5.6.9.1 General . 89
5.6.9.2 SSC mode . 89
5.6.9.2.1 SSC Mode 1 . 89
5.6.9.2.2 SSC Mode 2 . 89
5.6.9.2.3 SSC Mode 3 . 89
5.6.9.3 SSC mode selection. 90
5.6.10 Specific aspects of different PDU Session types . 90
5.6.10.1 Support of IP PDU Session type . 90
5.6.10.2 Support of Ethernet PDU Session type . 91
5.6.10.3 Support of Unstructured PDU Session type . 92
5.6.11 UE presence in Area of Interest reporting usage by SMF . 93
5.6.12 Use of Network Instance . 94
5.6.13 Always-on PDU session . 94
5.6.14 Support of Framed Routing . 95
5.7 QoS model . 95
5.7.1 General Overview . 95
5.7.1.1 QoS Flow . 95
5.7.1.2 QoS Profile . 96
5.7.1.3 Control of QoS Flows . 96
5.7.1.4 QoS Rules . 97
5.7.1.5 QoS Flow mapping . 97
5.7.1.6 DL traffic. 99
5.7.1.7 UL Traffic . 99
5.7.1.8 AMBR/MFBR enforcement and rate limitation . 100
5.7.1.9 Precedence Value . 100
5.7.2 5G QoS Parameters .
...