3GPP TS 23.501 V15.1.0 (2018-03)
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`Technical Specification
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`3rd Generation Partnership Project;
`Technical Specification Group Services and System Aspects;
`System Architecture for the 5G System;
`Stage 2
`(Release 15)
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`The present document has been developed within the 3rd Generation Partnership Project (3GPP TM) and may be further elaborated for the purposes of 3GPP.
`The present document has not been subject to any approval process by the 3GPP Organizational Partners and shall not be implemented.
`This Specification is provided for future development work within 3GPP only. The Organizational Partners accept no liability for any use of this Specification.
`Specifications and Reports for implementation of the 3GPP TM system should be obtained via the 3GPP Organizational Partners' Publications Offices.
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`Release 15
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`2
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`3GPP TS 23.501 V15.1.0 (2018-03)
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`Keywords
`3GPP, Architecture, 5G System, NextGen
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`3GPP
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`Postal address
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`3GPP support office address
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`Internet
`http://www.3gpp.org
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`Copyright Notification
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`No part may be reproduced except as authorized by written permission.
`The copyright and the foregoing restriction extend to reproduction in all media.
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`© 2018, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).
`All rights reserved.
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`UMTS™ is a Trade Mark of ETSI registered for the benefit of its members
`3GPP™ is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners
`LTE™ is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners
`GSM® and the GSM logo are registered and owned by the GSM Association
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`3GPP
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`Release 15
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`3GPP TS 23.501 V15.1.0 (2018-03)
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`Contents
`Foreword .................................................................................................................................................... 11
`1
`Scope ................................................................................................................................................ 12
`2
`References ........................................................................................................................................ 12
`3
`Definitions and abbreviations ............................................................................................................ 14
`3.1
`Definitions ................................................................................................................................................. 14
`3.2
`Abbreviations............................................................................................................................................. 17
`4
`Architecture model and concepts ....................................................................................................... 18
`4.1
`General concepts ........................................................................................................................................ 18
`4.2
`Architecture reference model ...................................................................................................................... 18
`4.2.1
`General ................................................................................................................................................. 18
`4.2.2
`Network Functions and entities ............................................................................................................. 19
`4.2.3
`Non-roaming reference architecture ...................................................................................................... 19
`4.2.4
`Roaming reference architectures ........................................................................................................... 23
`4.2.5
`Data Storage architectures ..................................................................................................................... 25
`4.2.6
`Service-based interfaces ........................................................................................................................ 27
`4.2.7
`Reference points ................................................................................................................................... 27
`4.2.8
`Support of non-3GPP access ................................................................................................................. 28
`4.2.8.1
`General Concepts to Support Non-3GPP Access .............................................................................. 28
`4.2.8.2
`Architecture Reference Model for Non-3GPP Accesses ................................................................... 29
`4.2.8.2.1
`Non-roaming Architecture for Non-3GPP Accesses .................................................................... 29
`4.2.8.2.2
`LBO Roaming Architecture for Non-3GPP Accesses, N3IWF in same PLMN as 3GPP access .... 30
`4.2.8.2.3
`Home-routed Roaming Architecture for Non-3GPP Accesses, N3IWF in same PLMN as
`3GPP access .............................................................................................................................. 31
`LBO Roaming Architecture for Non-3GPP Accesses, N3IWF in different PLMN from 3GPP
`access ........................................................................................................................................ 32
`Home-routed Roaming Architecture for Non-3GPP Accesses, N3IWF in different PLMN
`from 3GPP access ...................................................................................................................... 33
`Non-3GPP Access Reference Points ................................................................................................ 34
`Network Analytics architecture ............................................................................................................. 34
`Interworking with EPC ............................................................................................................................... 35
`Non-roaming architecture ..................................................................................................................... 35
`Roaming architecture ............................................................................................................................ 36
`Interworking between 5GC via non-3GPP access and E-UTRAN connected to EPC .............................. 37
`Non-roaming architecture ................................................................................................................ 37
`Roaming architecture....................................................................................................................... 38
`Interworking between ePDG connected to EPC and 5GS ....................................................................... 40
`Non-roaming architecture ................................................................................................................ 40
`Roaming architectures ..................................................................................................................... 41
`Specific services ........................................................................................................................................ 43
`Public Warning System ......................................................................................................................... 43
`SMS over NAS ..................................................................................................................................... 43
`Architecture to support SMS over NAS ........................................................................................... 43
`Reference point to support SMS over NAS ...................................................................................... 45
`Service based interface to support SMS over NAS ........................................................................... 45
`IMS support .......................................................................................................................................... 45
`Location services .................................................................................................................................. 46
`Architecture to support Location Services ........................................................................................ 46
`Reference point to support Location Services ................................................................................... 46
`Service Based Interfaces to support Location Services ..................................................................... 47
`Application Triggering Services ............................................................................................................ 47
`High level features ............................................................................................................................ 47
`General ...................................................................................................................................................... 47
`Network Access Control............................................................................................................................. 47
`General ................................................................................................................................................. 47
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`4.2.8.2.4
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`4.2.8.2.5
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`4.2.8.3
`4.2.9
`4.3
`4.3.1
`4.3.2
`4.3.3
`4.3.3.1
`4.3.3.2
`4.3.4
`4.3.4.1
`4.3.4.2
`4.4
`4.4.1
`4.4.2
`4.4.2.1
`4.4.2.2
`4.4.2.3
`4.4.3
`4.4.4
`4.4.4.1
`4.4.4.2
`4.4.4.3
`4.4.5
`5
`5.1
`5.2
`5.2.1
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`Release 15
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`3GPP TS 23.501 V15.1.0 (2018-03)
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`5.2.2
`5.2.3
`5.2.4
`5.2.5
`5.2.6
`5.2.7
`5.3
`5.3.1
`5.3.2
`5.3.2.1
`5.3.2.2
`5.3.2.2.1
`5.3.2.2.2
`5.3.2.2.3
`5.3.2.2.4
`5.3.2.3
`5.3.2.4
`5.3.3
`5.3.3.1
`5.3.3.2
`5.3.3.2.1
`5.3.3.2.2
`5.3.3.2.3
`5.3.3.2.4
`5.3.3.2.5
`5.3.3.3
`5.3.3.3.1
`5.3.3.3.2
`5.3.3.3.3
`5.3.3.4
`5.3.4
`5.3.4.1
`5.3.4.1.1
`5.3.4.1.2
`5.3.4.2
`5.3.4.3
`5.3.4.4
`5.4
`5.4.1
`5.4.1.1
`5.4.1.2
`5.4.1.3
`5.4.2
`5.4.3
`5.4.3.1
`5.4.3.2
`5.4.3.3
`5.4.4
`5.4.4.1
`5.4.4.2
`5.4.4.3
`5.4.4a
`5.4.5
`5.4.6
`5.4.6.1
`5.4.6.2
`5.4.6.3
`5.4.7
`5.5
`5.5.1
`5.5.2
`5.5.3
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`Network selection ................................................................................................................................. 47
`Identification and authentication ........................................................................................................... 48
`Authorisation ........................................................................................................................................ 48
`Access control and barring .................................................................................................................... 48
`Policy control ....................................................................................................................................... 48
`Lawful Interception .............................................................................................................................. 48
`Registration and Connection Management .................................................................................................. 48
`General ................................................................................................................................................. 48
`Registration Management ..................................................................................................................... 48
`General ........................................................................................................................................... 48
`5GS Registration Management states ............................................................................................... 49
`General ...................................................................................................................................... 49
`RM-DEREGISTERED state ....................................................................................................... 49
`RM-REGISTERED state ............................................................................................................ 49
`5GS Registration Management State models............................................................................... 50
`Registration Area management ........................................................................................................ 50
`Support of a UE registered over both 3GPP and Non-3GPP access ................................................... 51
`Connection Management ...................................................................................................................... 52
`General ........................................................................................................................................... 52
`5GS Connection Management states ................................................................................................ 52
`General ...................................................................................................................................... 52
`CM-IDLE state .......................................................................................................................... 52
`CM-CONNECTED state ............................................................................................................ 53
`5GS Connection Management State models ................................................................................ 54
`CM-CONNECTED with RRC Inactive state............................................................................... 54
`NAS signalling connection management .......................................................................................... 56
`General ...................................................................................................................................... 56
`NAS signalling connection establishment ................................................................................... 56
`NAS signalling connection Release ............................................................................................ 56
`Support of a UE connected over both 3GPP and Non-3GPP access .................................................. 56
`UE Mobility ......................................................................................................................................... 57
`Mobility Restrictions ....................................................................................................................... 57
`General ...................................................................................................................................... 57
`Management of Service Area Restrictions .................................................................................. 58
`Mobility Pattern .............................................................................................................................. 59
`Radio Resource Management functions ........................................................................................... 59
`UE mobility event notification ......................................................................................................... 60
`3GPP access specific aspects ...................................................................................................................... 60
`UE reachability in CM-IDLE ................................................................................................................ 60
`General ........................................................................................................................................... 60
`UE reachability allowing mobile terminated data while the UE is CM-IDLE .................................... 61
`Mobile Initiated Connection Only (MICO) mode ............................................................................. 61
`UE reachability in CM-CONNECTED .................................................................................................. 62
`Paging strategy handling ....................................................................................................................... 62
`General ........................................................................................................................................... 62
`Paging Policy Differentiation ........................................................................................................... 63
`Paging Priority ................................................................................................................................ 63
`UE Radio Capability handling ............................................................................................................... 64
`UE radio capability information storage in the AMF ........................................................................ 64
`Feature specific UE/RAN Radio information and Compatibility Request .......................................... 64
`Paging assistance information .......................................................................................................... 64
`UE MM Core Network Capability handling .......................................................................................... 65
`DRX (Discontinuous Reception) framework ......................................................................................... 65
`Core Network assistance information for RAN optimization .................................................................. 65
`General ........................................................................................................................................... 65
`Core Network assisted RAN parameters tuning ................................................................................ 66
`Core Network assisted RAN paging information .............................................................................. 66
`NG-RAN location reporting .................................................................................................................. 66
`Non-3GPP access specific aspects .............................................................................................................. 67
`Registration Management ..................................................................................................................... 67
`Connection Management ...................................................................................................................... 67
`UE Reachability.................................................................................................................................... 68
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`Release 15
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`5
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`3GPP TS 23.501 V15.1.0 (2018-03)
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`5.5.3.1
`5.5.3.2
`5.6
`5.6.1
`5.6.2
`5.6.3
`5.6.4
`5.6.4.1
`5.6.4.2
`5.6.4.3
`5.6.5
`5.6.6
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`5.6.7
`5.6.8
`5.6.9
`5.6.9.1
`5.6.9.2
`5.6.9.2.1
`5.6.9.2.2
`5.6.9.2.3
`5.6.9.3
`5.6.10
`5.6.10.1
`5.6.10.2
`5.6.10.3
`5.6.11
`5.7
`5.7.1
`5.7.1.1
`5.7.1.2
`5.7.1.3
`5.7.1.4
`5.7.1.5
`5.7.1.6
`5.7.1.7
`5.7.1.8
`5.7.1.9
`5.7.2
`5.7.2.1
`5.7.2.2
`5.7.2.3
`5.7.2.4
`5.7.2.5
`5.7.2.6
`5.7.2.7
`5.7.2.8
`5.7.3
`5.7.3.1
`5.7.3.2
`5.7.3.3
`5.7.3.4
`5.7.3.5
`5.7.3.6
`5.7.3.7
`5.7.4
`5.7.5
`5.7.5.1
`5.7.5.2
`5.7.5.3
`5.7.6
`5.7.6.1
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`UE reachability in CM-IDLE ........................................................................................................... 68
`UE reachability in CM-CONNECTED ............................................................................................ 68
`Session Management .................................................................................................................................. 69
`Overview .............................................................................................................................................. 69
`Interaction between AMF and SMF....................................................................................................... 70
`Roaming ............................................................................................................................................... 72
`Single PDU Session with multiple PDU Session Anchors ...................................................................... 73
`General ........................................................................................................................................... 73
`Usage of an UL Classifier for a PDU Session ................................................................................... 73
`Usage of IPv6 multi-homing for a PDU Session ............................................................................... 74
`Support for Local Area Data Network ................................................................................................... 75
`Secondary authentication/authorization by a DN-AAA server during the establishment of a PDU
`Session ................................................................................................................................................. 77
`Application Function influence on traffic routing .................................................................................. 78
`Selective activation and deactivation of UP connection of existing PDU Session ................................... 81
`Session and Service Continuity ............................................................................................................. 82
`General ........................................................................................................................................... 82
`SSC mode ....................................................................................................................................... 82
`SSC Mode 1............................................................................................................................... 82
`SSC Mode 2............................................................................................................................... 82
`SSC Mode 3............................................................................................................................... 82
`SSC mode selection ......................................................................................................................... 83
`Specific aspects of different PDU Session types .................................................................................... 84
`Support of IP PDU Session type ...................................................................................................... 84
`Support of Ethernet PDU Session type ............................................................................................. 84
`Support of Unstructured PDU Session type ...................................................................................... 85
`UE presence in Area of Interest reporting usage by SMF ....................................................................... 85
`QoS model ................................................................................................................................................. 87
`General Overview ................................................................................................................................. 87
`QoS Flow ........................................................................................................................................ 87
`QoS Profile ..................................................................................................................................... 87
`Control of QoS Flows ...................................................................................................................... 88
`QoS Rules ....................................................................................................................................... 88
`QoS Flow mapping .......................................................................................................................... 89
`DL traffic ........................................................................................................................................ 90
`UL Traffic ....................................................................................................................................... 91
`AMBR/MFBR enforcement and rate limitation ................................................................................ 91
`Precedence Value ............................................................................................................................ 91
`5G QoS Parameters............................................................................................................................... 92
`5QI ................................................................................................................................................. 92
`ARP ................................................................................................................................................ 92
`RQA ............................................................................................................................................... 92
`Notification control ......................................................................................................................... 92
`Flow Bit Rates................................................................................................................................. 93
`Aggregate Bit Rates......................................................................................................................... 93
`Default values ................................................................................................................................. 93
`Maximum Packet Loss Rate ............................................................................................................ 93
`5G QoS characteristics .......................................................................................................................... 94
`General ........................................................................................................................................... 94
`Resource Type ................................................................................................................................ 94
`Priority Level .................................................................................................................................. 94
`Packet Delay Budget ....................................................................................................................... 94
`Packet Error Rate ............................................................................................................................ 95
`Averaging Window ......................................................................................................................... 95
`Maximum Data Burst Volume ......................................................................................................... 95
`Standardized 5QI to QoS characteristics mapping .................................................................................. 95
`Reflective QoS ..................................................................................................................................... 97
`General ........................................................................................................................................... 97
`UE Derived QoS Rule ................................................................................................................ 97
`Reflective QoS Control.................................................................................................................... 98
`Packet Filter Set .................................................................................................................................... 99
`General ........................................................................................................................................... 99
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`Release 15
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`6
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`3GPP TS 23.501 V15.1.0 (2018-03)
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`5.7.6.2
`5.7.6.3
`5.8
`5.8.1
`5.8.2
`5.8.2.1
`5.8.2.2
`5.8.2.2.1
`5.8.2.2.2
`5.8.2.2.3
`5.8.2.3
`5.8.2.3.1
`5.8.2.3.2
`5.8.2.3.3
`5.8.2.4
`5.8.2.4.1
`5.8.2.4.2
`5.8.2.5
`5.8.2.6
`5.8.2.6.1
`5.8.2.6.2
`5.8.2.6.3
`5.8.2.7
`5.8.2.8
`5.8.2.8.1
`5.8.2.8.2
`5.8.2.8.3
`5.8.2.8.4
`5.8.2.9
`5.8.2.9.0
`5.8.2.9.1
`5.8.2.9.2
`5.8.2.10
`5.8.2.11
`5.8.2.11.1
`5.8.2.11.2
`5.8.2.11.3
`5.8.2.11.4
`5.8.2.11.5
`5.8.2.11.6
`5.8.3
`5.8.3.1
`5.8.3.2
`5.8.3.3
`5.8.4
`5.9
`5.9.1
`5.9.2
`5.9.2a
`5.9.3
`5.9.4
`5.9.5
`5.9.6
`5.9.7
`5.9.8
`5.10
`5.10.1
`5.10.2
`5.10.2.1
`5.10.3
`5.11
`5.11.1
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`IP Packet Filter Set .......................................................................................................................... 99
`Ethernet Packet Filter Set ................................................................................................................ 99
`User Plane Management ........................................................................................................................... 100
`General ............................................................................................................................................... 100
`Functional Description ........................................................................................................................ 100
`General ......................................................................................................................................... 100
`UE IP Address Management .......................................................................................................... 100
`General .................................................................................................................................... 100
`Routing rules configuration ...................................................................................................... 102
`The procedure of Stateless IPv6 Address Autoconfiguration ..................................................... 102
`Management of CN Tunnel Info .................................................................................................... 103
`General .................................................................................................................................... 103
`Management of CN Tunnel Info in the SMF ............................................................................. 103
`Management of CN Tunnel Info in the UPF.............................................................................. 103
`Traffic Detection ........................................................................................................................... 103
`General .................................................................................................................................... 103
`Traffic Detection Information ................................................................................................... 103
`Control of User Plane Forwarding.................................................................................................. 104
`Charging and Usage Monitoring Handling ..................................................................................... 105
`General .................................................................................................................................... 105
`Activation of Usage Reporting in UPF...................................................................................... 105
`Reporting of Usage Information towards SMF .......................................................................... 105
`PDU Session and QoS Flow Policing ............................................................................................. 106
`PCC Related Functions .................................................................................................................. 106
`Activation/Deactivation of predefined PCC rules ...................................................................... 106
`Enforcement of Dynamic PCC Rules ...................................................................................