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Content for TS 36.304 Word version: 18.2.0

1… 4… 5… 6…

5.1 PLMN selection 5.2 Cell selection and reselection 5.2.1 Introduction 5.2.2 States and state transitions in Idle Mode 5.2.3 Cell Selection process 5.2.4 Cell Reselection evaluation process 5.2.6 Camped Normally state 5.2.7 Cell Selection at transition to RRC_IDLE or RRC_INACTIVE state 5.2.7a Cell Selection at transition to RRC_IDLE state for NB-IoT 5.2.8 Any Cell Selection state 5.2.8a Any Cell Selection state for NB-IoT 5.2.9 Camped on Any Cell state 5.3 Cell Reservations and Access Restrictions 5.3.1 Cell status and cell reservations 5.3.2 Access control 5.3.3 Emergency call 5.4 Tracking Area registration 5.5 Support for manual CSG selection 5.5.1 E-UTRA case 5.5.2 UTRA case 5.6 RAN-assisted WLAN interworking 5.6.1 RAN assistance parameter handling in RRC_IDLE 5.6.2 Access network selection and traffic steering rules 5.6.3 RAN assistance parameters definition

5 Process and procedure descriptions p. 18

5.1 PLMN selection p. 18

5.1.1 Void

5.1.2 Support for PLMN selection p. 18

5.1.2.1 General p. 18

5.1.2.2 E-UTRA and NB-IoT case p. 18

5.1.2.3 UTRA case p. 18

5.1.2.4 GSM case p. 19

5.1.2.5 CDMA2000 case p. 19

5.1.2.6 NR case |R15| p. 19

5.2 Cell selection and reselection p. 19

5.2.1 Introduction p. 19

5.2.2 States and state transitions in Idle Mode p. 20

5.2.3 Cell Selection process p. 21

5.2.3.1 Description p. 21

5.2.3.2 Cell Selection Criterion p. 22

5.2.3.2a Cell Selection Criterion for NB-IoT |R13| p. 24

5.2.3.3 CSG cells and Hybrid cells in Cell Selection p. 24

5.2.3.4 GSM case in Cell Selection p. 24

5.2.3.5 UTRAN case in Cell Selection p. 25

5.2.3.6 NR case in Cell Selection |R15| p. 25

5.2.4 Cell Reselection evaluation process p. 25

5.2.4.1 Reselection priorities handling p. 25

5.2.4.2 Measurement rules for cell re-selection p. 27

5.2.4.2a Measurement rules for cell re-selection for NB-IoT |R13| p. 30

5.2.4.3 Mobility states of a UE p. 31

5.2.4.3.1 Scaling rules p. 31

5.2.4.4 Cells with cell reservations, access restrictions or unsuitable for normal camping p. 32

5.2.4.5 E-UTRAN Inter-frequency and inter-RAT Cell Reselection criteria p. 33

5.2.4.6 Intra-frequency and equal priority inter-frequency Cell Reselection criteria p. 34

5.2.4.6a Reselection for enhanced coverage |R13| p. 35

5.2.4.7 Cell reselection parameters in system information broadcasts p. 35

5.2.4.7.1 Speed dependant reselection parameters p. 38

5.2.4.8 Cell reselection with CSG cells p. 39

5.2.4.8.1 Cell reselection from a non-CSG cell to a CSG cell p. 39

5.2.4.8.2 Cell reselection from a CSG cell p. 39

5.2.4.9 Cell reselection with Hybrid cells |R9| p. 40

5.2.4.10 E-UTRAN Inter-frequency Redistribution procedure |R13| p. 40

5.2.4.10.1 Redistribution target selection p. 40

5.2.4.11 Cell reselection or CN type change when storing UE AS context |R13| p. 41

5.2.4.12 Relaxed monitoring |R14| p. 41

5.2.4.12.0 Relaxed monitoring measurement rules p. 41

5.2.4.12.1 Relaxed monitoring criterion p. 41

5.2.4.13 Cell reselection or CN type change in RRC_INACTIVE state |R15| p. 42

5.2.5 Void

5.2.6 Camped Normally state p. 42

5.2.7 Cell Selection at transition to RRC_IDLE or RRC_INACTIVE state p. 42

5.2.7a Cell Selection at transition to RRC_IDLE state for NB-IoT |R13| p. 42

5.2.8 Any Cell Selection state p. 42

5.2.8a Any Cell Selection state for NB-IoT |R13| p. 43

5.2.9 Camped on Any Cell state p. 43

5.3 Cell Reservations and Access Restrictions p. 43

5.3.1 Cell status and cell reservations p. 43

5.3.2 Access control p. 46

5.3.3 Emergency call p. 46

5.4 Tracking Area registration p. 46

5.5 Support for manual CSG selection p. 46

5.5.1 E-UTRA case p. 46

5.5.2 UTRA case p. 47

5.6 RAN-assisted WLAN interworking |R12| p. 47

5.6.1 RAN assistance parameter handling in RRC_IDLE p. 47

5.6.2 Access network selection and traffic steering rules p. 47

5.6.3 RAN assistance parameters definition p. 48