ETSI TS 124 301 V17.6.0 (2022-05)

Universal Mobile Telecommunications System (UMTS); LTE; 5G; Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 (3GPP TS 24.301 version 17.6.0 Release 17)

RTS/TSGC-0124301vh60

General Information

• Status: Not Published
• Technical Committee: 3GPP CT 1 - MM/CC/SM [lu] (formely CN1)
• Current Stage: 12 - Completion
• Completion Date: 16-May-2022

Standards Content (Sample)

ETSI TS 124 301 V17.6.0 (2022-05)






TECHNICAL SPECIFICATION
Universal Mobile Telecommunications System (UMTS);
LTE;
5G;
Non-Access-Stratum (NAS)
protocol for Evolved Packet System (EPS);
Stage 3
(3GPP TS 24.301 version 17.6.0 Release 17)

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3GPP TS 24.301 version 17.6.0 Release 17 1 ETSI TS 124 301 V17.6.0 (2022-05)

Reference
RTS/TSGC-0124301vh60
Keywords
5G,LTE,UMTS
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ETSI

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3GPP TS 24.301 version 17.6.0 Release 17 2 ETSI TS 124 301 V17.6.0 (2022-05)
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ETSI

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3GPP TS 24.301 version 17.6.0 Release 17 3 ETSI TS 124 301 V17.6.0 (2022-05)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 20
1 Scope . 22
2 References . 22
3 Definitions and abbreviations . 25
3.1 Definitions . 25
3.2 Abbreviations . 32
4 General . 34
4.1 Overview . 34
4.2 Linkage between the protocols for EPS mobility management and EPS session management . 34
4.2A Handling of NAS signalling low priority indication . 35
4.3 UE mode of operation . 35
4.3.1 General . 35
4.3.2 Change of UE mode of operation . 36
4.3.2.1 General . 36
4.3.2.2 Change of UE's usage setting . 38
4.3.2.3 Change of voice domain preference for E-UTRAN . 39
4.3.2.4 Change or determination of IMS registration status . 40
4.3.2.5 Change of configuration regarding the use of SMS. . 42
4.4 NAS security . 43
4.4.1 General . 43
4.4.2 Handling of EPS security contexts . 43
4.4.2.1 General . 43
4.4.2.2 Establishment of a mapped EPS security context during intersystem handover . 44
4.4.2.3 Establishment of secure exchange of NAS messages . 45
4.4.2.4 Change of security keys . 47
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 . 48
4.4.3 Handling of NAS COUNT and NAS sequence number . 49
4.4.3.1 General . 49
4.4.3.2 Replay protection . 50
4.4.3.3 Integrity protection and verification . 50
4.4.3.4 Ciphering and deciphering . 50
4.4.3.5 NAS COUNT wrap around . 50
4.4.4 Integrity protection of NAS signalling messages. 51
4.4.4.1 General . 51
4.4.4.2 Integrity checking of NAS signalling messages in the UE . 51
4.4.4.3 Integrity checking of NAS signalling messages in the MME . 52
4.4.5 Ciphering of NAS signalling messages . 54
4.5 Disabling and re-enabling of UE's E-UTRA capability . 54
4.6 Applicability of procedures . 57
4.6.1 Relay nodes . 57
4.7 EPS mobility management and EPS session management in NB-S1 mode . 57
4.8 EPS mobility management and EPS session management in WB-S1 mode for IoT . 58
4.8.1 UE not using satellite E-UTRAN access . 58
4.8.2 UE using satellite E-UTRAN access . 59
4.9 Disabling and re-enabling of UE's NB-IoT capability . 59
4.10 Support of MUSIM features . 60
5 Elementary procedures for EPS mobility manage ment . 60
5.1 Overview . 60
5.1.1 General . 60
ETSI

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3GPP TS 24.301 version 17.6.0 Release 17 4 ETSI TS 124 301 V17.6.0 (2022-05)
5.1.2 Types of EMM procedures . 60
5.1.3 EMM sublayer states . 62
5.1.3.1 General . 62
5.1.3.2 EMM sublayer states in the UE. 62
5.1.3.2.1 General . 62
5.1.3.2.2 Main states . 62
5.1.3.2.2.1 EMM-NULL . 62
5.1.3.2.2.2 EMM-DEREGISTERED . 62
5.1.3.2.2.3 EMM-REGISTERED-INITIATED . 62
5.1.3.2.2.4 EMM-REGISTERED . 62
5.1.3.2.2.5 EMM-DEREGISTERED-INITIATED . 63
5.1.3.2.2.6 EMM-TRACKING-AREA-UPDATING-INITIATED . 63
5.1.3.2.2.7 EMM-SERVICE-REQUEST-INITIATED. 63
5.1.3.2.3 Substates of state EMM-DEREGISTERED . 63
5.1.3.2.3.1 General . 63
5.1.3.2.3.2 EMM-DEREGISTERED.NORMAL-SERVICE . 64
5.1.3.2.3.3 EMM-DEREGISTERED.LIMITED-SERVICE . 64
5.1.3.2.3.4 EMM-DEREGISTERED.ATTEMPTING-TO-ATTACH. 64
5.1.3.2.3.5 EMM-DEREGISTERED.PLMN-SEARCH . 64
5.1.3.2.3.6 EMM-DEREGISTERED.NO-IMSI . 64
5.1.3.2.3.7 EMM-DEREGISTERED.ATTACH-NEEDED . 64
5.1.3.2.3.8 EMM-DEREGISTERED.NO-CELL-AVAILABLE . 64
5.1.3.2.3.9 EMM-DEREGISTERED.eCALL-INACTIVE . 64
5.1.3.2.4 Substates of state EMM-REGISTERED . 65
5.1.3.2.4.1 General . 65
5.1.3.2.4.2 EMM-REGISTERED.NORMAL-SERVICE . 65
5.1.3.2.4.3 EMM-REGISTERED.ATTEMPTING-TO-UPDATE . 65
5.1.3.2.4.4 EMM-REGISTERED.LIMITED-SERVICE . 65
5.1.3.2.4.5 EMM-REGISTERED.PLMN-SEARCH . 65
5.1.3.2.4.6 EMM-REGISTERED.UPDATE-NEEDED . 65
5.1.3.2.4.7 EMM-REGISTERED.NO-CELL-AVAILABLE . 65
5.1.3.2.4.8 EMM-REGISTERED.ATTEMPTING-TO-UPDATE-MM . 65
5.1.3.2.4.9 EMM-REGISTERED.IMSI-DETACH-INITIATED . 65
5.1.3.3 EPS update status . 66
5.1.3.4 EMM sublayer states in the MME . 66
5.1.3.4.1 EMM-DEREGISTERED. 66
5.1.3.4.2 EMM-COMMON-PROCEDURE-INITIATED . 66
5.1.3.4.3 EMM-REGISTERED . 66
5.1.3.4.4 EMM-DEREGISTERED-INITIATED . 66
5.1.4 Coordination between EMM and GMM . 67
5.1.5 Coordination between EMM and MM . 68
5.2 Behaviour of the UE in state EMM-DEREGISTERED and state EMM-REGISTERED . 68
5.2.1 General . 68
5.2.2 UE behaviour in state EMM-DEREGISTERED . 68
5.2.2.1 General . 68
5.2.2.2 Primary substate selection . 69
5.2.2.2.1 Selection of the substate after power on . 69
5.2.2.3 Detailed description of UE behaviour in state EMM-DEREGISTERED . 69
5.2.2.3.1 NORMAL-SERVICE . 69
5.2.2.3.2 LIMITED-SERVICE . 69
5.2.2.3.3 ATTEMPTING-TO-ATTACH . 69
5.2.2.3.4 PLMN-SEARCH . 70
5.2.2.3.5 NO-IMSI . 70
5.2.2.3.6 ATTACH-NEEDED . 70
5.2.2.3.7 NO-CELL-AVAILABLE . 70
5.2.2.3.8 eCALL-INACTIVE . 71
5.2.2.4 Substate when back to state EMM-DEREGISTERED from another EMM state . 71
5.2.3 UE behaviour in state EMM-REGISTERED . 71
5.2.3.1 General . 71
5.2.3.2 Detailed description of UE behaviour in state EMM-REGISTERED . 72
5.2.3.2.1 NORMAL-SERVICE . 72
5.2.3.2.2 ATTEMPTING-TO-UPDATE . 72
ETSI

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3GPP TS 24.301 version 17.6.0 Release 17 5 ETSI TS 124 301 V17.6.0 (2022-05)
5.2.3.2.3 LIMITED-SERVICE . 73
5.2.3.2.4 PLMN-SEARCH . 73
5.2.3.2.5 UPDATE-NEEDED . 73
5.2.3.2.6 NO-CELL-AVAILABLE . 74
5.2.3.2.7 ATTEMPTING-TO-UPDATE-MM. 74
5.2.3.2.8 IMSI-DETACH-INITIATED . 74
5.3 General on elementary EMM procedures . 74
5.3.1 EMM modes and NAS signalling connection . 74
5.3.1.1 Establishment of the NAS signalling connection . 74
5.3.1.2 Release of the NAS signalling connection . 76
5.3.1.2.1 General . 76
5.3.1.2.2 UE is using EPS services with control plane CIoT EPS optimization . 79
5.3.1.3 Suspend and resume of the NAS signalling connection . 79
5.3.2 Lists of forbidden tracking areas . 80
5.3.3 List of forbidden PLMNs for attach in S101 mode . 80
5.3.3a Forbidden PLMNs for EPS services . 80
5.3.4 Equivalent PLMNs list. 80
5.3.5 Handling of the periodic tracking area update timer and mobile reachable timer (S1 mode only) . 81
5.3.6 Handling of timer T3402 . 82
5.3.7 Handling of the Local Emergency Numbers List and the Extended Local Emergency Numbers List . 83
5.3.7a Specific requirements for UE configured to use timer T3245 . 84
5.3.7b Specific requirements for UE when receiving non-integrity protected reject messages . 84
5.3.8 Abnormal cases in the UE . 87
5.3.9 Handling of NAS level mobility management congestion control . 88
5.3.9A Handling of congestion control for transport of user data via the control plane . 89
5.3.10 Access class control . 89
5.3.11 Power saving mode . 89
5.3.12 Extended idle-mode DRX cycle . 90
5.3.13 Interaction between power saving mode and extended idle mode DRX cycle . 91
5.3.14 Dedicated core network . 91
5.3.15 CIoT EPS optimizations . 91
5.3.16 Restriction on use of enhanced coverage . 93
5.3.17 Service Gap Control. 93
5.3.18 Restricted local operator services . 95
5.3.19 Core Network selection and redirection for UEs using CIoT optimizations. 95
5.3.19.1 Core network selection . 95
5.3.19.2 Redirection of the UE by the core network . 95
5.3.20 UE radio capability signalling optimisatio n . 96
5.3.21 Wake-up signal assistance . 97
5.4 EMM common procedures . 98
5.4.1 GUTI reallocation procedure . 98
5.4.1.1 General . 98
5.4.1.2 GUTI reallocation initiation by the network . 98
5.4.1.3
...