5  Elementary procedures for EPS mobility management  Word‑p. 61

5.1  Overview

5.1.1  General

5.1.2  Types of EMM procedures

5.1.3  EMM sublayer states  Word‑p. 63

5.1.3.1  General

5.1.3.2  EMM sublayer states in the UE

5.1.3.2.1  General

5.1.3.2.2  Main states

5.1.3.2.2.1  EMM-NULL

5.1.3.2.2.2  EMM-DEREGISTERED

5.1.3.2.2.3  EMM-REGISTERED-INITIATED

5.1.3.2.2.4  EMM-REGISTERED

5.1.3.2.2.5  EMM-DEREGISTERED-INITIATED  Word‑p. 64

5.1.3.2.2.6  EMM-TRACKING-AREA-UPDATING-INITIATED

5.1.3.2.2.7  EMM-SERVICE-REQUEST-INITIATED

5.1.3.2.3  Substates of state EMM-DEREGISTERED  Word‑p. 65

5.1.3.2.3.1  General

5.1.3.2.3.2  EMM-DEREGISTERED.NORMAL-SERVICE

5.1.3.2.3.3  EMM-DEREGISTERED.LIMITED-SERVICE

5.1.3.2.3.4  EMM-DEREGISTERED.ATTEMPTING-TO-ATTACH

5.1.3.2.3.5  EMM-DEREGISTERED.PLMN-SEARCH

5.1.3.2.3.6  EMM-DEREGISTERED.NO-IMSI

5.1.3.2.3.7  EMM-DEREGISTERED.ATTACH-NEEDED

5.1.3.2.3.8  EMM-DEREGISTERED.NO-CELL-AVAILABLE

5.1.3.2.3.9  EMM-DEREGISTERED.eCALL-INACTIVE |R14|

5.1.3.2.4  Substates of state EMM-REGISTERED  Word‑p. 66

5.1.3.2.4.1  General

5.1.3.2.4.2  EMM-REGISTERED.NORMAL-SERVICE

5.1.3.2.4.3  EMM-REGISTERED.ATTEMPTING-TO-UPDATE

5.1.3.2.4.4  EMM-REGISTERED.LIMITED-SERVICE

5.1.3.2.4.5  EMM-REGISTERED.PLMN-SEARCH

5.1.3.2.4.6  EMM-REGISTERED.UPDATE-NEEDED

5.1.3.2.4.7  EMM-REGISTERED.NO-CELL-AVAILABLE

5.1.3.2.4.8  EMM-REGISTERED.ATTEMPTING-TO-UPDATE-MM  Word‑p. 67

5.1.3.2.4.9  EMM-REGISTERED.IMSI-DETACH-INITIATED

5.1.3.3  EPS update status

5.1.3.4  EMM sublayer states in the MME

5.1.3.4.1  EMM-DEREGISTERED

5.1.3.4.2  EMM-COMMON-PROCEDURE-INITIATED

5.1.3.4.3  EMM-REGISTERED

5.1.3.4.4  EMM-DEREGISTERED-INITIATED  Word‑p. 68

5.1.4  Coordination between EMM and GMM

5.1.5  Coordination between EMM and MM  Word‑p. 69

5.2  Behaviour of the UE in state EMM-DEREGISTERED and state EMM-REGISTERED

5.2.1  General

5.2.2  UE behaviour in state EMM-DEREGISTERED  Word‑p. 70

5.2.2.1  General

5.2.2.2  Primary substate selection

5.2.2.2.1  Selection of the substate after power on

5.2.2.3  Detailed description of UE behaviour in state EMM-DEREGISTERED

5.2.2.3.1  NORMAL-SERVICE

5.2.2.3.2  LIMITED-SERVICE  Word‑p. 71

5.2.2.3.3  ATTEMPTING-TO-ATTACH

5.2.2.3.4  PLMN-SEARCH

5.2.2.3.5  NO-IMSI

5.2.2.3.6  ATTACH-NEEDED  Word‑p. 72

5.2.2.3.7  NO-CELL-AVAILABLE

5.2.2.3.8  eCALL-INACTIVE |R14|

5.2.2.4  Substate when back to state EMM-DEREGISTERED from another EMM state

5.2.3  UE behaviour in state EMM-REGISTERED  Word‑p. 73

5.2.3.1  General

5.2.3.2  Detailed description of UE behaviour in state EMM-REGISTERED

5.2.3.2.1  NORMAL-SERVICE

5.2.3.2.2  ATTEMPTING-TO-UPDATE

5.2.3.2.3  LIMITED-SERVICE  Word‑p. 74

5.2.3.2.4  PLMN-SEARCH

5.2.3.2.5  UPDATE-NEEDED  Word‑p. 75

5.2.3.2.6  NO-CELL-AVAILABLE

5.2.3.2.7  ATTEMPTING-TO-UPDATE-MM

5.2.3.2.8  IMSI-DETACH-INITIATED |R9|

5.3  General on elementary EMM procedures  Word‑p. 76

5.3.1  EMM modes and NAS signalling connection

5.3.1.1  Establishment of the NAS signalling connection

5.3.1.2  Release of the NAS signalling connection  Word‑p. 77

5.3.1.2.1  General |R13|

5.3.1.2.2  UE is using EPS services with control plane CIoT EPS optimization |R13|  Word‑p. 80

5.3.1.3  Suspend and resume of the NAS signalling connection |R13|

5.3.2  Lists of forbidden tracking areas  Word‑p. 81

5.3.3  List of forbidden PLMNs for attach in S101 mode

5.3.3a  Forbidden PLMNs for EPS services |R11|  Word‑p. 82

5.3.4  Equivalent PLMNs list

5.3.5  Handling of the periodic tracking area update timer and mobile reachable timer (S1 mode only)

5.3.6  Handling of timer T3402  Word‑p. 84

5.3.7  Handling of the Local Emergency Numbers List and the Extended Local Emergency Numbers List

5.3.7a  Specific requirements for UE configured to use timer T3245 |R10|  Word‑p. 86

5.3.7b  Specific requirements for UE when receiving non-integrity protected reject messages |R13|

5.3.8  Abnormal cases in the UE  Word‑p. 89

5.3.9  Handling of NAS level mobility management congestion control |R10|

5.3.9A  Handling of congestion control for transport of user data via the control plane |R14|  Word‑p. 90

5.3.10  Access class control |R11|

5.3.11  Power saving mode |R12|  Word‑p. 91

5.3.12  Extended idle-mode DRX cycle |R13|  Word‑p. 92

5.3.13  Interaction between power saving mode and extended idle mode DRX cycle |R13|

5.3.14  Dedicated core network |R13|

5.3.15  CIoT EPS optimizations |R13|  Word‑p. 93

5.3.16  Restriction on use of enhanced coverage |R14|  Word‑p. 94

5.3.17  Service Gap Control |R15|  Word‑p. 95

5.3.18  Restricted local operator services |R16|  Word‑p. 96

5.3.19  Core Network selection and redirection for UEs using CIoT optimizations |R16|  Word‑p. 97

5.3.19.1  Core network selection

5.3.19.2  Redirection of the UE by the core network

5.3.20  UE radio capability signalling optimisation |R16|

5.3.21  Wake-up signal assistance |R16|  Word‑p. 99

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