5G-3GPP23.501,涉及5G组网

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最近学5G，其中涉及3GPP协议23.501关于5G SA组网结构的协议，分享给大家。

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Contents
Foreword ....................................................................................................................................................11
1 Scope................................................................................................................................................12
2 References........................................................................................................................................12
3 Definitions and abbreviations............................................................................................................15
3.1 Definitions ....................................................................................................................................................... 15
3.2 Abbreviations................................................................................................................................................... 17
4 Architecture model and concepts.......................................................................................................19
4.1 General concepts.............................................................................................................................................. 19
4.2 Architecture reference model........................................................................................................................... 19
4.2.1 General ....................................................................................................................................................... 19
4.2.2 Network Functions and entities.................................................................................................................. 20
4.2.3 Non-roaming reference architecture........................................................................................................... 20
4.2.4 Roaming reference architectures ................................................................................................................ 23
4.2.5 Data Storage architectures.......................................................................................................................... 26
4.2.6 Service-based interfaces ............................................................................................................................. 27
4.2.7 Reference points......................................................................................................................................... 27
4.2.8 Support of non-3GPP access ...................................................................................................................... 29
4.2.8.1 General Concepts to Support Non-3GPP Access ................................................................................. 29
4.2.8.2 Architecture Reference Model for Non-3GPP Accesses ...................................................................... 30
4.2.8.2.1 Non-roaming Architecture for Non-3GPP Accesses....................................................................... 30
4.2.8.2.2 LBO Roaming Architecture for Non-3GPP Accesses, N3IWF in same PLMN as 3GPP access.... 31
4.2.8.2.3 Home-routed Roaming Architecture for Non-3GPP Accesses, N3IWF in same PLMN as
3GPP access .................................................................................................................................... 32
4.2.8.2.4 LBO Roaming Architecture for Non-3GPP Accesses, N3IWF in different PLMN from 3GPP
access .............................................................................................................................................. 33
4.2.8.2.5 Home-routed Roaming Architecture for Non-3GPP Accesses, N3IWF in different PLMN
from 3GPP access ........................................................................................................................... 34
4.2.8.3 Non-3GPP Access Reference Points .................................................................................................... 35
4.2.9 Network Analytics architecture.................................................................................................................. 35
4.3 Interworking with EPC .................................................................................................................................... 36
4.3.1 Non-roaming architecture........................................................................................................................... 36
4.3.2 Roaming architecture ................................................................................................................................. 37
4.3.3 Interworking between 5GC via non-3GPP access and E-UTRAN connected to EPC ............................... 38
4.3.3.1 Non-roaming architecture..................................................................................................................... 38
4.3.3.2 Roaming architecture............................................................................................................................ 39
4.3.4 Interworking between ePDG connected to EPC and 5GS.......................................................................... 41
4.3.4.1 Non-roaming architecture..................................................................................................................... 41
4.3.4.2 Roaming architectures .......................................................................................................................... 42
4.4 Specific services............................................................................................................................................... 44
4.4.1 Public Warning System.............................................................................................................................. 44
4.4.2 SMS over NAS........................................................................................................................................... 44
4.4.2.1 Architecture to support SMS over NAS ............................................................................................... 44
4.4.2.2 Reference point to support SMS over NAS .......................................................................................... 46
4.4.2.3 Service based interface to support SMS over NAS .............................................................................. 46
4.4.3 IMS support................................................................................................................................................ 46
4.4.4 Location services........................................................................................................................................ 47
4.4.4.1 Architecture to support Location Services............................................................................................ 47
4.4.4.2 Reference point to support Location Services ...................................................................................... 47
4.4.4.3 Service Based Interfaces to support Location Services ........................................................................ 48
4.4.5 Application Triggering Services................................................................................................................. 48
5 High level features............................................................................................................................48
5.1 General............................................................................................................................................................. 48
5.2 Network Access Control .................................................................................................................................. 48
5.2.1 General ....................................................................................................................................................... 48
3GPP
Release 15 4 3GPP TS 23.501 V15.4.0 (2018-12)
5.2.2 Network selection....................................................................................................................................... 48
5.2.3 Identification and authentication ................................................................................................................ 49
5.2.4 Authorisation.............................................................................................................................................. 49
5.2.5 Access control and barring ......................................................................................................................... 49
5.2.6 Policy control ............................................................................................................................................. 50
5.2.7 Lawful Interception .................................................................................................................................... 50
5.3 Registration and Connection Management ...................................................................................................... 50
5.3.1 General ....................................................................................................................................................... 50
5.3.2 Registration Management........................................................................................................................... 50
5.3.2.1 General ................................................................................................................................................. 50
5.3.2.2 5GS Registration Management states ................................................................................................... 50
5.3.2.2.1 General............................................................................................................................................ 50
5.3.2.2.2 RM-DEREGISTERED state ........................................................................................................... 50
5.3.2.2.3 RM-REGISTERED state ................................................................................................................ 51
5.3.2.2.4 5GS Registration Management State models .................................................................................. 51
5.3.2.3 Registration Area management............................................................................................................. 52
5.3.2.4 Support of a UE registered over both 3GPP and Non-3GPP access..................................................... 52
5.3.3 Connection Management............................................................................................................................ 54
5.3.3.1 General ................................................................................................................................................. 54
5.3.3.2 5GS Connection Management states .................................................................................................... 54
5.3.3.2.1 General............................................................................................................................................ 54
5.3.3.2.2 CM-IDLE state................................................................................................................................ 54
5.3.3.2.3 CM-CONNECTED state................................................................................................................. 55
5.3.3.2.4 5GS Connection Management State models ................................................................................... 55
5.3.3.2.5 CM-CONNECTED with RRC Inactive state.................................................................................. 56
5.3.3.3 NAS signalling connection management.............................................................................................. 58
5.3.3.3.1 General............................................................................................................................................ 58
5.3.3.3.2 NAS signalling connection establishment....................................................................................... 58
5.3.3.3.3 NAS signalling connection Release ................................................................................................ 58
5.3.3.4 Support of a UE connected over both 3GPP and Non-3GPP access .................................................... 58
5.3.4 UE Mobility................................................................................................................................................ 59
5.3.4.1 Mobility Restrictions............................................................................................................................ 59
5.3.4.1.1 General............................................................................................................................................ 59
5.3.4.1.2 Management of Service Area Restrictions...................................................................................... 60
5.3.4.2 Mobility Pattern.................................................................................................................................... 61
5.3.4.3 Radio Resource Management functions ............................................................................................... 61
5.3.4.4 UE mobility event notification ............................................................................................................. 62
5.4 3GPP access specific aspects ........................................................................................................................... 63
5.4.1 UE reachability in CM-IDLE ..................................................................................................................... 63
5.4.1.1 General ................................................................................................................................................. 63
5.4.1.2 UE reachability allowing mobile terminated data while the UE is CM-IDLE ..................................... 64
5.4.1.3 Mobile Initiated Connection Only (MICO) mode ................................................................................ 64
5.4.2 UE reachability in CM-CONNECTED ...................................................................................................... 64
5.4.3 Paging strategy handling ............................................................................................................................ 65
5.4.3.1 General ................................................................................................................................................. 65
5.4.3.2 Paging Policy Differentiation ............................................................................................................... 65
5.4.3.3 Paging Priority...................................................................................................................................... 66
5.4.4 UE Radio Capability handling.................................................................................................................... 66
5.4.4.1 UE radio capability information storage in the AMF ........................................................................... 66
5.4.4.2 Void...................................................................................................................................................... 67
5.4.4.2a UE Radio Capability Match Request.................................................................................................... 67
5.4.4.3 Paging assistance information .............................................................................................................. 67
5.4.4a UE MM Core Network Capability handling .............................................................................................. 67
5.4.4b UE 5GSM Core Network Capability handling........................................................................................... 68
5.4.5 DRX (Discontinuous Reception) framework ............................................................................................. 68
5.4.6 Core Network assistance information for RAN optimization..................................................................... 69
5.4.6.1 General ................................................................................................................................................. 69
5.4.6.2 Core Network assisted RAN parameters tuning ................................................................................... 69
5.4.6.3 Core Network assisted RAN paging information ................................................................................. 69
5.4.7 NG-RAN location reporting....................................................................................................................... 70
5.5 Non-3GPP access specific aspects................................................................................................................... 70
5.5.1 Registration Management........................................................................................................................... 70
3GPP
Release 15 5 3GPP TS 23.501 V15.4.0 (2018-12)
5.5.2 Connection Management............................................................................................................................ 70
5.5.3 UE Reachability ......................................................................................................................................... 71
5.5.3.1 UE reachability in CM-IDLE ............................................................................................................... 71
5.5.3.2 UE reachability in CM-CONNECTED ................................................................................................ 71
5.6 Session Management ....................................................................................................................................... 72
5.6.1 Overview .................................................................................................................................................... 72
5.6.2 Interaction between AMF and SMF ........................................................................................................... 74
5.6.3 Roaming ..................................................................................................................................................... 75
5.6.4 Single PDU Session with multiple PDU Session Anchors......................................................................... 76
5.6.4.1 General ................................................................................................................................................. 76
5.6.4.2 Usage of an UL Classifier for a PDU Session ...................................................................................... 76
5.6.4.3 Usage of IPv6 multi-homing for a PDU Session.................................................................................. 77
5.6.5 Support for Local Area Data Network ....................................................................................................... 78
5.6.6 Secondary authentication/authorization by a DN-AAA server during the establishment of a PDU
Session........................................................................................................................................................ 80
5.6.7 Application Function influence on traffic routing ...................................................................................... 82
5.6.8 Selective activation and deactivation of UP connection of existing PDU Session..................................... 87
5.6.9 Session and Service Continuity.................................................................................................................. 88
5.6.9.1 General ................................................................................................................................................. 88
5.6.9.2 SSC mode ............................................................................................................................................. 88
5.6.9.2.1 SSC Mode 1.................................................................................................................................... 88
5.6.9.2.2 SSC Mode 2.................................................................................................................................... 88
5.6.9.2.3 SSC Mode 3.................................................................................................................................... 88
5.6.9.3 SSC mode selection.............................................................................................................................. 89
5.6.10 Specific aspects of different PDU Session types........................................................................................ 89
5.6.10.1 Support of IP PDU Session type........................................................................................................... 89
5.6.10.2 Support of Ethernet PDU Session type................................................................................................. 90
5.6.10.3 Support of Unstructured PDU Session type.......................................................................................... 91
5.6.11 UE presence in Area of Interest reporting usage by SMF .......................................................................... 92
5.6.12 Use of Network Instance ............................................................................................................................ 93
5.6.13 Always-on PDU session............................................................................................................................. 93
5.7 QoS model ....................................................................................................................................................... 94
5.7.1 General Overview....................................................................................................................................... 94
5.7.1.1 QoS Flow.............................................................................................................................................. 94
5.7.1.2 QoS Profile........................................................................................................................................... 94
5.7.1.3 Control of QoS Flows........................................................................................................................... 95
5.7.1.4 QoS Rules............................................................................................................................................. 95
5.7.1.5 QoS Flow mapping............................................................................................................................... 96
5.7.1.6 DL traffic .............................................................................................................................................. 98
5.7.1.7 UL Traffic............................................................................................................................................. 98
5.7.1.8 AMBR/MFBR enforcement and rate limitation ................................................................................... 98
5.7.1.9 Precedence Value ................................................................................................................................. 99
5.7.2 5G QoS Parameters .................................................................................................................................... 99
5.7.2.1 5QI........................................................................................................................................................ 99
5.7.2.2 ARP ...................................................................................................................................................... 99
5.7.2.3 RQA.................................................................................................................................................... 100
5.7.2.4 Notification control............................................................................................................................. 100
5.7.2.5 Flow Bit Rates .................................................................................................................................... 100
5.7.2.6 Aggregate Bit Rates............................................................................................................................ 101
5.7.2.7 Default values ..................................................................................................................................... 101
5.7.2.8 Maximum Packet Loss Rate ............................................................................................................... 101
5.7.3 5G QoS characteristics ............................................................................................................................. 102
5.7.3.1 General ............................................................................................................................................... 102
5.7.3.2 Resource Type .................................................................................................................................... 102
5.7.3.3 Priority Level ...................................................................................................................................... 102
5.7.3.4 Packet Delay Budget........................................................................................................................... 103
5.7.3.5 Packet Error Rate................................................................................................................................ 103
5.7.3.6 Averaging Window............................................................................................................................. 103
5.7.3.7 Maximum Data Burst Volume............................................................................................................ 103
5.7.4 Standardized 5QI to QoS characteristics mapping ................................................................................... 104
5.7.5 Reflective QoS ......................................................................................................................................... 106
5.7.5.1 General ............................................................................................................................................... 106