10.1.9 Mobility in RRC_INACTIVE

36.3003GPPEvolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN)Overall descriptionRelease 17Stage 2TS

10.1.9.1 Overview

Mobility procedures for the RRC_INACTIVE state as specified in clause 9.2.2.1 of TS 38.300 [79] also apply for EUTRA connected to 5GC with the following differences:

– ng-eNB shall be considered instead of gNB.

10.1.9.2 Cell Reselection

A UE in RRC_INACTIVE performs cell reselection. The principles of the procedure are same as for the RRC_IDLE state (see sublclause 10.1.1.2). In addition, for E-UTRA RRC_INACTIVE state:

– Cell reselection from E-UTRA RRC_INACTIVE to NR RRC_IDLE is supported;

– Cell reselection from E-UTRA RRC_INACTIVE to E-UTRA/EPC RRC_IDLE is supported.

10.1.9.3 RAN-Based Notification Area

A UE in the RRC_INACTIVE state can be configured with an RNA as it is specified in clause 9.2.2.3 of TS 38.300 [79].

10.1.9.4 State Transitions

10.1.9.4.1 UE triggered transition from RRC_INACTIVE to RRC_CONNECTED

The UE triggered transition from RRC_INACTIVE to RRC_CONNECTED procedure of clause 9.2.2.4.1 of TS 38.300 [79] is applicable with the following differences:

– ng-eNB shall be considered instead of gNB.

10.1.9.4.2 Network triggered transition from RRC_INACTIVE to RRC_CONNECTED

The Network triggered transition from RRC_INACTIVE to RRC_CONNECTED procedure of clause 9.2.2.4.2 of TS 38.300 [79] is applicable with the following differences:

– ng-eNB shall be considered instead of gNB;

– To resume from RRC_INACTIVE the procedure in clause 10.1.9.4.1 shall be applied.

10.1.9.5 RNA update

The RNA update procedure of clause 9.2.2.5 of TS 38.300 [79] is applicable with the following differences:

– ng-eNB shall be considered instead of gNB.