TS 24501
---
title: "3GPP TS 24501"
source: "3GPP_Rel19_24_series"
---
# TS 24501
## 文档摘要
```
Contents
Foreword 28
1 Scope 29
2 References 29
3 Definitions and abbreviations 35
3.1 Definitions 35
3.2 Abbreviations 48
4 General 52
4.1 Overview 52
4.2 Coordination between the protocols for 5GS mobility management and 5GS session management 52
4.2A Control of UE access technology utilization by 5GS 53
4.2A.1 General 53
4.2A.2 List of PLMNs with associated access technology restrictions 53
4.3 UE domain selection 54
4.3.1 UE's usage setting 54
4.3.2 Domain selection for UE originating sessions / calls 54
4.3.3 Change of UE's usage setting 56
4.3.4 Change or determination of IMS voice availability 57
4.4 NAS security 58
4.4.1 General 58
4.4.2 Handling of 5G NAS security contexts 59
4.4.2.1 General 59
4.4.2.1.1 Establishment of 5G NAS security context 59
4.4.2.1.2 UE leaving state 5GMM-DEREGISTERED 61
4.4.2.1.3 UE entering state 5GMM-DEREGISTERED 61
4.4.2.2 Establishment of a mapped 5G NAS security context during inter-system change from S1 mode to N1 mode in 5GMM-CONNECTED mode 61
4.4.2.3 Establishment of a 5G NAS security context during N1 mode to N1 mode handover 62
4.4.2.4 Establishment of an EPS security context during inter-system change from N1 mode to S1 mode in 5GMM-CONNECTED mode 64
4.4.2.5 Establishment of secure exchange of NAS messages 64
4.4.2.6 Change of security keys 66
4.4.3 Handling of NAS COUNT and NAS sequence number 67
4.4.3.1 General 67
4.4.3.2 Replay protection 68
4.4.3.3 Integrity protection and verification 68
4.4.3.4 Ciphering and deciphering 68
4.4.3.5 NAS COUNT wrap around 69
4.4.4 Integrity protection of NAS signalling messages 69
4.4.4.1 General 69
4.4.4.2 Integrity checking of NAS signalling messages in the UE 70
4.4.4.3 Integrity checking of NAS signalling messages in the AMF 71
4.4.5 Ciphering of NAS signalling messages 72
4.4.6 Protection of initial NAS signalling messages 73
4.4.7 Protection of NAS IEs 75
4.5 Unified access control 76
4.5.1 General 76
4.5.2 Determination of the access identities and access category associated with a request for access for UEs not operating in SNPN access operation mode over 3GPP access 78
4.5.2A Determination of the access identities and access category associated with a request for access for UEs operating in SNPN access operation mode over 3GPP access 84
4.5.3 Operator-defined access categories 90
4.5.4 Access control and checking 92
4.5.4.1 Access control and checking in 5GMM-IDLE mode and in 5GMM-IDLE mode with suspend indication 92
4.5.4.2 Access control and checking in 5GMM-CONNECTED mode and in 5GMM-CONNECTED mode with RRC inactive indication 94
4.5.5 Exception handling and avoiding double barring 96
4.5.6 Mapping between access categories/access identities and RRC establishment cause 101
4.6 Network slicing 102
4.6.1 General 102
4.6.2 Mobility management aspects 106
4.6.2.1 General 106
4.6.2.2 NSSAI storage 107
4.6.2.3 Provision of NSSAI to lower layers in 5GMM-IDLE mode 115
4.6.2.4 Network slice-specific authentication and authorization 117
4.6.2.5 Mobility management-based network slice admission control 119
4.6.2.6 Provision of NSAG information to lower layers 120
4.6.2.7 Mobility management-based network slice replacement 121
4.6.2.8 Mobility management for optimised handling of temporarily available network slices 123
4.6.2.9 Mobility management based network slice usage control 124
4.6.2.10 Mobility management aspects of handling network slices with NS-AoS not matching deployed tracking areas 125
4.6.2.11 Mobility management for partial network slice 126
4.6.3 Session management aspects 128
4.6.3.0 General 128
4.6.3.1 Session management based network slice admission control 128
4.6.3.2 Support of network slice admission control and interworking with EPC 128
4.6.3.3 Session management based network slice data rate limitation control 129
4.6.3.4 Session management based network slice replacement 129
4.6.3.5 Session management for optimized handling of temporarily available network slices 130
4.6.3.6 Session management for partial network slice 131
4.6.3.7 Session management aspect of handling network slices with NS-AoS not matching deployed tracking areas 132
4.7 NAS over non-3GPP access 133
4.7.1 General 133
4.7.2 5GS mobility management aspects 133
4.7.2.1 General 133
4.7.2.2 Establishment cause for non-3GPP access 134
4.7.3 5GS session management aspects 135
4.7.4 Limited service state over non-3GPP access 136
4.7.5 NAS signalling using trusted WLAN access network 136
4.8 Interworking with E-UTRAN connected to EPC 137
4.8.1 General 137
4.8.2 Single-registration mode 137
4.8.2.1 General 137
4.8.2.2 Single-registration mode with N26 interface 137
4.8.2.3 Single-registration mode without N26 interface 137
4.8.2.3.1 Interworking between NG-RAN and E-UTRAN 137
4.8.2.3.2 Interworking between TNGF or N3IWF connected to 5GCN and E-UTRAN 139
4.8.3 Dual-registration mode 140
4.8.4 Core Network selection for UEs not using CIoT 5GS optimizations 141
4.8.4A Core Network selection and redirection for UEs using CIoT optimizations 142
4.8.4A.1 Core network selection 142
4.8.4A.2 Redirection of the UE by the core network 142
4.9 Disabling and re-enabling of UE's N1 mode capability 143
4.9.1 General 143
4.9.2 Disabling and re-enabling of UE's N1 mode capability for 3GPP access 143
4.9.3 Disabling and re-enabling of UE's N1 mode capability for non-3GPP access 147
4.9.4 Disabling and re-enabling of UE's satellite NG-RAN capability 147
4.10 Interworking with ePDG connected to EPC 148
4.11 UE configuration parameter updates 148
4.12 Access traffic steering, switching and splitting (ATSSS) 149
4.13 Support of NAS signalling using wireline access network 149
4.14 Non-public network (NPN) 151
4.14.1 General 151
4.14.2 Stand-alone non-public network (SNPN) 151
4.14.3 Public network integrated non-public network (PNI-NPN) 153
4.15 Time synchronization and time sensitive communication 155
4.15.1 General 155
4.15.2 Void 155
4.15.2.1 Void 155
4.15.2.2 Void 155
4.15.2.3 Void 155
4.15.3 Time synchronization 155
4.15.4 User plane node management 155
4.16 UE radio capability signalling optimisation 156
4.17 5GS mobility management in NB-N1 mode 157
4.18 5GS session management in NB-N1 mode 157
4.19 5GS mobility management in WB-N1 mode for IoT 158
4.20 5GS session management in WB-N1 mode for IoT 158
4.21 Authentication and key management for applications (AKMA) 159
4.22 Uncrewed aerial vehicle identification, authentication, authorization and operational restrictions 160
4.22.1 General 160
4.22.2 Authentication and authorization of UAV 160
4.22.3 Authorization of C2 communication 161
4.22.4 Void 161
4.22.5 Support of no-transmit zone (NTZ) 161
4.23 NAS over Non-Terrestrial Network 162
4.23.1 General 162
4.23.2 List of "PLMNs not allowed to operate at the present UE location" 162
4.23.3 5GS mobility management via a satellite NG-RAN cell 163
4.23.4 5GS session management via a satellite NG-RAN cell 163
4.23.5 Handling multiple tracking area codes from the lower layers 164
4.24 Minimization of service interruption 165
4.25 Support of MUSIM features 166
4.26 Support for Personal IoT Network service 167
4.27 Mobile base station relay support 168
4.28 NAS-specific aspects of mobile gNB with wireless access backhauling (MWAB) 168
4.28.1 General 168
4.28.2 Authorization of MWAB-UE 168
4.28.3 Control of UE access via MWAB 169
4.29 Support of indirect network sharing 169
4.30 QoS differentiation of traffic for non-3GPP device identifier 170
5 Elementary procedures for 5GS mobility management 171
5.1 Overview 171
5.1.1 General 171
5.1.2 Types of 5GMM procedures 172
5.1.3 5GMM sublayer states 173
5.1.3.1 General 173
5.1.3.2 5GMM sublayer states 173
5.1.3.2.1 5GMM sublayer states in the UE 173
5.1.3.2.1.1 General 173
5.1.3.2.1.2 Main states 174
5.1.3.2.1.2.1 5GMM-NULL 174
5.1.3.2.1.2.2 5GMM-DEREGISTERED 174
5.1.3.2.1.2.3 5GMM-REGISTERED-INITIATED 174
5.1.3.2.1.2.4 5GMM-REGISTERED 174
5.1.3.2.1.2.5 5GMM-DEREGISTERED-INITIATED 174
5.1.3.2.1.2.6 5GMM-SERVICE-REQUEST-INITIATED 174
5.1.3.2.1.3 Substates of state
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## 缩略语 (Abbrevations)
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## 完整内容
（原始协议内容较长，请参考原始 docx 文件或后续 Claude Code 处理）