TS 24301
---
title: "3GPP TS 24301"
source: "3GPP_Rel19_24_series"
---
# TS 24301
## 文档摘要
```
Contents
Foreword 21
1 Scope 22
2 References 22
3 Definitions and abbreviations 26
3.1 Definitions 26
3.2 Abbreviations 34
4 General 35
4.1 Overview 35
4.2 Linkage between the protocols for EPS mobility management and EPS session management 36
4.2A Handling of NAS signalling low priority indication 36
4.3 UE mode of operation 37
4.3.1 General 37
4.3.2 Change of UE mode of operation 38
4.3.2.1 General 38
4.3.2.2 Change of UE's usage setting 40
4.3.2.3 Change of voice domain preference for E-UTRAN 41
4.3.2.4 Change or determination of IMS registration status 42
4.3.2.5 Change of configuration regarding the use of SMS. 43
4.4 NAS security 43
4.4.1 General 43
4.4.2 Handling of EPS security contexts 44
4.4.2.1 General 44
4.4.2.2 Establishment of a mapped EPS security context during intersystem handover 45
4.4.2.3 Establishment of secure exchange of NAS messages 46
4.4.2.4 Change of security keys 48
4.4.2.5 Derivation of keys at CS to PS SRVCC handover from A/Gb mode to S1 mode or from Iu mode to S1 mode 49
4.4.3 Handling of NAS COUNT and NAS sequence number 50
4.4.3.1 General 50
4.4.3.2 Replay protection 51
4.4.3.3 Integrity protection and verification 51
4.4.3.4 Ciphering and deciphering 51
4.4.3.5 NAS COUNT wrap around 52
4.4.4 Integrity protection of NAS signalling messages 52
4.4.4.1 General 52
4.4.4.2 Integrity checking of NAS signalling messages in the UE 53
4.4.4.3 Integrity checking of NAS signalling messages in the MME 53
4.4.5 Ciphering of NAS signalling messages 55
4.5 Disabling and re-enabling of UE's E-UTRA capability 56
4.6 Applicability of procedures 59
4.6.1 Relay nodes 59
4.7 EPS mobility management and EPS session management in NB-S1 mode 59
4.8 EPS mobility management and EPS session management in WB-S1 mode for IoT 60
4.8.1 UE not using satellite E-UTRAN access 60
4.8.2 UE using satellite E-UTRAN access 60
4.9 Disabling and re-enabling of UE's NB-IoT capability 61
4.9A Disabling and re-enabling of UE's satellite E-UTRAN capability 62
4.10 Support of MUSIM features 62
4.11 Satellite access for EPS 62
4.11.1 General 62
4.11.2 Handling list of "PLMNs not allowed to operate at the present UE location" 63
4.11.3 Handling multiple tracking area codes from the lower layers 64
4.11.4 Support for enhanced discontinuous coverage 64
4.11.5 Support for store and forward (S&F) satellite operation 66
4.11.5.1 General 66
4.11.5.2 Handling of timers 66
4.11.5.3 Handling of S&F monitoring list and estimated S&F uplink delivery time duration 67
4.12 MINT-EPS for UE to obtain service in EPS under disaster condition 68
5 Elementary procedures for EPS mobility management 69
5.1 Overview 69
5.1.1 General 69
5.1.2 Types of EMM procedures 70
5.1.3 EMM sublayer states 71
5.1.3.1 General 71
5.1.3.2 EMM sublayer states in the UE 71
5.1.3.2.1 General 71
5.1.3.2.2 Main states 71
5.1.3.2.3 Substates of state EMM-DEREGISTERED 73
5.1.3.2.4 Substates of state EMM-REGISTERED 74
5.1.3.3 EPS update status 75
5.1.3.4 EMM sublayer states in the MME 76
5.1.3.4.1 EMM-DEREGISTERED 76
5.1.3.4.2 EMM-COMMON-PROCEDURE-INITIATED 76
5.1.3.4.3 EMM-REGISTERED 76
5.1.3.4.4 EMM-DEREGISTERED-INITIATED 76
5.1.4 Coordination between EMM and GMM 77
5.1.5 Coordination between EMM and MM 78
5.2 Behaviour of the UE in state EMM-DEREGISTERED and state EMM-REGISTERED 78
5.2.1 General 78
5.2.2 UE behaviour in state EMM-DEREGISTERED 78
5.2.2.1 General 78
5.2.2.2 Primary substate selection 79
5.2.2.2.1 Selection of the substate after power on 79
5.2.2.3 Detailed description of UE behaviour in state EMM-DEREGISTERED 79
5.2.2.3.1 NORMAL-SERVICE 79
5.2.2.3.2 LIMITED-SERVICE 79
5.2.2.3.3 ATTEMPTING-TO-ATTACH 79
5.2.2.3.4 PLMN-SEARCH 80
5.2.2.3.5 NO-IMSI 80
5.2.2.3.6 ATTACH-NEEDED 81
5.2.2.3.7 NO-CELL-AVAILABLE 81
5.2.2.3.8 eCALL-INACTIVE 81
5.2.2.4 Substate when back to state EMM-DEREGISTERED from another EMM state 81
5.2.3 UE behaviour in state EMM-REGISTERED 82
5.2.3.1 General 82
5.2.3.2 Detailed description of UE behaviour in state EMM-REGISTERED 82
5.2.3.2.1 NORMAL-SERVICE 82
5.2.3.2.2 ATTEMPTING-TO-UPDATE 82
5.2.3.2.3 LIMITED-SERVICE 84
5.2.3.2.4 PLMN-SEARCH 84
5.2.3.2.5 UPDATE-NEEDED 84
5.2.3.2.6 NO-CELL-AVAILABLE 84
5.2.3.2.7 ATTEMPTING-TO-UPDATE-MM 85
5.2.3.2.8 IMSI-DETACH-INITIATED 85
5.3 General on elementary EMM procedures 85
5.3.1 EMM modes and NAS signalling connection 85
5.3.1.1 Establishment of the NAS signalling connection 85
5.3.1.2 Release of the NAS signalling connection 87
5.3.1.2.1 General 87
5.3.1.2.2 UE is using EPS services with control plane CIoT EPS optimization 91
5.3.1.3 Suspend and resume of the NAS signalling connection 91
5.3.2 Lists of forbidden tracking areas 92
5.3.3 List of forbidden PLMNs for attach in S101 mode 92
5.3.3a Forbidden PLMNs for EPS services 93
5.3.4 Equivalent PLMNs list 93
5.3.5 Handling of the periodic tracking area update timer and mobile reachable timer (S1 mode only) 93
5.3.6 Handling of timer T3402 95
5.3.7 Handling of the Local Emergency Numbers List and the Extended Local Emergency Numbers List 95
5.3.7a Specific requirements for UE configured to use timer T3245 96
5.3.7b Specific requirements for UE when receiving non-integrity protected reject messages 97
5.3.8 Abnormal cases in the UE 100
5.3.9 Handling of NAS level mobility management congestion control 101
5.3.9A Handling of congestion control for transport of user data via the control plane 102
5.3.10 Access class control 102
5.3.11 Power saving mode 103
5.3.12 Extended idle-mode DRX cycle 104
5.3.13 Interaction between power saving mode and extended idle mode DRX cycle 104
5.3.14 Dedicated core network 104
5.3.15 CIoT EPS optimizations 105
5.3.16 Restriction on use of enhanced coverage 107
5.3.17 Service Gap Control 107
5.3.18 Restricted local operator services 109
5.3.19 Core Network selection and redirection for UEs using CIoT optimizations 109
5.3.19.1 Core network selection 109
5.3.19.2 Redirection of the UE by the core network 109
5.3.20 UE radio capability signalling optimisation 110
5.3.21 Wake-up signal assistance 111
5.3.22 Void 112
5.3.23 Control of UE access technology utilization by EPS 112
5.3.23.1 General 112
5.3.23.2 List of PLMNs with associated access technology restrictions 112
5.4 EMM common procedures 112
5.4.1 GUTI reallocation procedure 112
5.4.1.1 General 112
5.4.1.2 GUTI reallocation initiation by the network 113
5.4.1.3 GUTI reallocation completion by the UE 113
5.4.1.4 GUTI reallocation completion by the network 114
5.4.1.5 Abnormal cases in the UE 114
5.4.1.6 Abnormal cases on the network side 114
5.4.2 Authentication procedure 116
5.4.2.1 General 116
5.4.2.2 Authentication initiation by the network 116
5.4.2.3 Authentication response by the UE 117
5.4.2.4 Authentication completion by the network 118
5.4.2.5 Authentication not accepted by the network 118
5.4.2.6 Authentication not accepted by the UE 119
5.4.2.7 Abnormal cases 119
5.4.3 Security mode control procedure 124
5.4.3.1 General 124
5.4.3.2 NAS security mode control initiation by the network 125
5.4.3.3 NAS security mode command accepted by the UE 128
5.4.3.4 NAS security mode control completion by the network 129
5.4.3.5 NAS security mode command not accepted by the UE 130
5.4.3.6 Abnormal cases in the UE 130
5.4.3.7 Abnormal cases on the network side 130
5.4.4 Identification procedure 131
5.4.4.1 General 131
5.4.4.2 Identification initiation by the network 131
5.4.4.3 Identification response by the UE 132
5.4.4.4 Identification completion by the network 132
5.4.4.5 Abnormal cases in the UE 132
5.4.4.6 Abnormal cases on the network side 132
5.4.5 EMM information procedure 133
5.4.5.1 General 133
5.4.5.2 EMM information procedure initiation by the network 133
5.4.5.3 EMM information procedure in the UE 134
5.4.5.4 Abnormal cases on the network side 134
5.5 EMM specific procedures 134
5.5.1 Attach procedure 134
5.5.1.1 General 134
5.5.1.2 Attach procedure for EPS services 136
5.5.1.2.1 General 136
5.5.1.2.2 Attach procedure initiation 136
5.5.1.2.3 EMM common procedure initiation 142
5.5.1.2.4 Attach
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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）