TS 24008
---
title: "3GPP TS 24008"
source: "3GPP_Rel19_24_series"
---
# TS 24008
## 文档摘要
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3GPP TS 24.008 V19.5.0 (2025-12)
Technical Specification
3rd Generation Partnership Project;
Technical Specification Group Core Network and Terminals;
Mobile radio interface Layer 3 specification;
Core network protocols; Stage 3
(Release 19)
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 Organisational Partners and shall not be implemented.
This Specification is provided for future development work within 3GPP only. The Organisational 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 Organisational Partners' Publications Offices.
Keywords
UMTS, GSM, radio, layer 3, stage 3, network, LTE
3GPP
Postal address
3GPP support office address
650 Route des Lucioles - Sophia Antipolis
Valbonne - FRANCE
Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16
Internet
http://www.3gpp.org
Copyright Notification
No part may be reproduced except as authorized by written permission.
The copyright and the foregoing restriction extend to reproduction in all media.
© 2025, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC).
All rights reserved.
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
Contents
Foreword 28
Introduction 28
1 Scope 29
1.1 Scope of the Technical Specification 29
1.2 Application to the interface structures 29
1.3 Structure of layer 3 procedures 29
1.4 Test procedures 30
1.5 Use of logical channels in A/Gb mode 30
1.6 Overview of control procedures 30
1.6.1 List of procedures 30
1.7 Applicability of implementations 32
1.7.1 Voice Group Call Service (VGCS) and Voice Broadcast Service (VBS) 32
1.7.2 General Packet Radio Service (GPRS) 32
1.7.2.1 Packet services in GSM (A/Gb mode only) 32
1.7.2.2 Packet services in Iu mode (Iu mode only) 33
1.8 Handling of NAS signalling low priority indication 33
1.9 Restrictions 34
2 References 34
2.1 Definitions and abbreviations 41
2.1.1 Random values 42
2.1.2 Vocabulary 42
3 Radio Resource management procedures 47
4 Elementary procedures for Mobility Management 48
4.1 General 48
4.1.1 MM and GMM procedures 48
4.1.1.1 Types of MM and GMM procedures 48
4.1.1.1.1 Integrity Checking of Signalling Messages in the Mobile Station (Iu mode only) 50
4.1.1.1.1a Integrity protection for emergency call (Iu mode only) 52
4.1.1.2 MM-GMM co-ordination for GPRS MS's 52
4.1.1.2.1 GPRS MS operating in mode A or B in a network that operates in mode I 52
4.1.1.2.2 GPRS MS operating in mode A or B in a network that operates in mode II 53
4.1.1.2A Coordination between GMM and EMM 54
4.1.1.2B Coordination between GMM and 5GMM 54
4.1.1.3 Core Network System Information for MM (Iu mode only) 54
4.1.1.4 Core Network System Information for GMM (Iu mode only) 54
4.1.1.4.1 General 54
4.1.1.4.2 Control of Network Mode of Operation I 54
4.1.1.5 Access class control 55
4.1.1.6 Specific requirements for MS configured to use timer T3245 56
4.1.1.6A Specific requirements for the MS when receiving non-integrity protected reject messages 56
4.1.1.7 Handling of NAS level mobility management congestion control 62
4.1.1.8 Handling of security related parameters at switch on and switch off 63
4.1.1.9 Equivalent PLMNs list 63
4.1.1.10 Dedicated core network 63
4.1.2 MM sublayer states 64
4.1.2.1 MM sublayer states in the mobile station 64
4.1.2.1.1 Main states 64
4.1.2.1.2 Substates of the MM IDLE state 67
4.1.2.2 The update Status 69
4.1.2.3 MM sublayer states on the network side 69
4.1.3 GPRS mobility management (GMM) sublayer states 71
4.1.3.1 GMM states in the MS 71
4.1.3.1.1 Main states 71
4.1.3.1.2 Substates of state GMM-DEREGISTERED 72
4.1.3.1.3 Substates of state GMM-REGISTERED 72
4.1.3.2 GPRS update status 75
4.1.3.3 GMM mobility management states on the network side 75
4.1.3.3.1 Main States 76
4.1.3.3.2 Substates of state GMM-REGISTERED 76
4.2 Behaviour of the MS in MM Idle state, GMM-DEREGISTERED state and GMM-REGISTERED state 77
4.2.1 Primary Service State selection 77
4.2.1.1 Selection of the Service State after Power On. 77
4.2.1.2 Other Cases 78
4.2.2 Detailed Description of the MS behaviour in MM IDLE State. 78
4.2.2.1 Service State, NORMAL SERVICE 78
4.2.2.2 Service State, ATTEMPTING TO UPDATE 79
4.2.2.3 Service State, LIMITED SERVICE 79
4.2.2.4 Service State, NO IMSI 80
4.2.2.5 Service State, SEARCH FOR PLMN, NORMAL SERVICE 80
4.2.2.6 Service State, SEARCH FOR PLMN 81
4.2.2.7 Service State, RECEIVING GROUP CALL (NORMAL SERVICE) 81
4.2.2.8 Service State, RECEIVING GROUP CALL (LIMITED SERVICE) 81
4.2.2.9 Service State, eCALL INACTIVE 82
4.2.3 Service state when back to state MM IDLE from another state 82
4.2.4 Behaviour in state GMM-DEREGISTERED 83
4.2.4.1 Primary substate selection 83
4.2.4.1.1 Selection of the substate after power on or enabling the MS's GPRS capability 83
4.2.4.1.2 Other Cases 84
4.2.4.2 Detailed description of the MS behaviour in state GMM-DEREGISTERED 84
4.2.4.2.1 Substate, NORMAL-SERVICE 84
4.2.4.2.2 Substate, ATTEMPTING-TO-ATTACH 84
4.2.4.2.3 Substate, LIMITED-SERVICE 85
4.2.4.2.4 Substate, NO-IMSI 85
4.2.4.2.5 Substate, NO-CELL 85
4.2.4.2.6 Substate, PLMN-SEARCH 85
4.2.4.2.7 Substate, ATTACH-NEEDED 85
4.2.4.2.8 Substate, SUSPENDED (A/Gb mode only) 85
4.2.4.3 Substate when back to state GMM-DEREGISTERED from another GMM state 85
4.2.5 Behaviour in state GMM-REGISTERED 86
4.2.5.1 Detailed description of the MS behaviour in state GMM-REGISTERED 86
4.2.5.1.1 Substate, NORMAL-SERVICE 86
4.2.5.1.2 Substate, SUSPENDED (A/Gb mode only) 86
4.2.5.1.3 Substate, UPDATE-NEEDED 87
4.2.5.1.4 Substate, ATTEMPTING-TO-UPDATE 87
4.2.5.1.5 Substate, NO-CELL-AVAILABLE 88
4.2.5.1.6 Substate, LIMITED-SERVICE 88
4.2.5.1.7 Substate, ATTEMPTING-TO-UPDATE-MM 88
4.2.5.1.8 Substate, PLMN-SEARCH 88
4.3 MM common procedures 88
4.3.1 TMSI reallocation procedure 88
4.3.1.0 General 88
4.3.1.1 TMSI reallocation initiation by the network 89
4.3.1.2 TMSI reallocation completion by the mobile station 89
4.3.1.3 TMSI reallocation completion in the network. 89
4.3.1.4 Abnormal cases in the mobile station 89
4.3.1.5 Abnormal cases on the network side 90
4.3.2 Authentication procedure 90
4.3.2a Authentication procedure used for a UMTS authentication challenge 90
4.3.2b Authentication Procedure used for a GSM authentication challenge 91
4.3.2.1 Authentication request by the network 91
4.3.2.2 Authentication response by the mobile station 91
4.3.2.3 Authentication processing in the network 92
4.3.2.3a 128-bit circuit-switched GSM ciphering key 92
4.3.2.4 Ciphering key sequence number 92
4.3.2.5 Authentication not accepted by the network 93
4.3.2.5.0 General 93
4.3.2.5.1 Authentication not accepted by the MS 94
4.3.2.6 Abnormal cases 95
4.3.2.6.1 MS behaviour towards a network that has failed the authentication procedure 97
4.3.2.7 Handling of keys at intersystem change from Iu mode to A/Gb mode 97
4.3.2.7a Use of established security contexts 98
4.3.2.8 Handling of keys at intersystem change from A/Gb mode to Iu mode 99
4.3.2.9 Void 100
4.3.2.10 Derivation of keys at SRVCC or vSRVCC handover from S1 mode 100
4.3.2.10.0 General 100
4.3.2.10.1 PDN connection with integrity protection 100
4.3.2.10.2 PDN connection without integrity protection 100
4.3.2.11 Derivation of keys at SRVCC handover from Iu mode to Iu mode 100
4.3.2.11.1 PDN connection with integrity protection 100
4.3.2.11.2 PDN connection without integrity protection 101
4.3.2.12 Derivation of keys at SRVCC handover from Iu mode to A/Gb mode 102
4.3.2.12.1 PDN connection with
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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）