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TS 38.304 RAN2 ★
5G New Radio —
User Equipment Procedures in Idle Mode

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V15.6.0 (PDF) 2019/12 32 p.

Rapporteur: Dr. Ozturk, Ozcan

The present document specifies the Access Stratum (AS) part of the Idle and Inactive Mode procedures applicable to a UE. The present document specifies the model for the functional division between the NAS and AS in a UE.

The present document applies to all UEs that support at least New Generation Radio Access Network, including multi-RAT UEs as described in 3GPP specifications, in the following cases:

When the UE is camped on a New Generation Radio Access Network cell;
When the UE is searching for a cell to camp on;

NOTE: When the UE is camped on or searching for a cell to camp on belonging to other RATs, the UE behaviour is described in the specifications of the other RAT.

full Table of Contents for TS 38.304 Word version: 15.6.0

1 Scope Word-p. 6

3 Definitions, symbols and abbreviations Word-p. 7

3.1 Definitions

3.2 Abbreviations

4 General description of RRC_IDLE state and RRC_INACTIVE state Word-p. 8

4.2 Functional division between AS and NAS in RRC_IDLE state and RRC_INACTIVE state Word-p. 9

4.3 Service types in RRC_IDLE state Word-p. 12

4.4 Service types in RRC_INACTIVE state

4.5 Cell Categories

5 Process and procedure descriptions Word-p. 13

5.1 PLMN selection

5.1.1 Support for PLMN selection

5.1.1.1 General

5.1.1.2 NR case

5.1.1.3 E-UTRA case

5.2 Cell selection and reselection

5.2.1 Introduction

5.2.2 States and state transitions in RRC_IDLE state and RRC_INACTIVE state Word-p. 15

5.2.3 Cell Selection process Word-p. 16

5.2.3.1 Description

5.2.3.2 Cell Selection Criterion

5.2.3.3 E-UTRAN case in Cell Selection Word-p. 17

5.2.4 Cell Reselection evaluation process

5.2.4.1 Reselection priorities handling

5.2.4.2 Measurement rules for cell re-selection Word-p. 18

5.2.4.3 Mobility states of a UE Word-p. 19

5.2.4.3.0 Introduction

5.2.4.3.1 Scaling rules

5.2.4.4 Cells with cell reservations, access restrictions or unsuitable for normal camping Word-p. 20

5.2.4.5 NR Inter-frequency and inter-RAT Cell Reselection criteria

5.2.4.6 Intra-frequency and equal priority inter-frequency Cell Reselection criteria Word-p. 21

5.2.4.7 Cell reselection parameters in system information broadcasts

5.2.4.7.0 General reselection parameters

5.2.4.7.1 Speed dependent reselection parameters Word-p. 23

5.2.4.8 Inter-RAT Cell reselection in RRC_INACTIVE state Word-p. 24

5.2.5 Camped Normally state

5.2.6 Selection of cell at transition to RRC_IDLE or RRC_INACTIVE state

5.2.7 Any Cell Selection state Word-p. 25

5.2.8 Camped on Any Cell state

5.3 Cell Reservations and Access Restrictions

5.3.0 Introduction

5.3.1 Cell status and cell reservations

5.3.2 Unified access control Word-p. 26

5.4 Tracking Area registration

5.5 RAN Area registration Word-p. 27

6 Reception of broadcast information

6.1 Reception of system information

7.1 Discontinuous Reception for paging

A Change history Word-p. 29