RRCResume

RRC message · TS 38.331 v19.4.0 (2026-09) · clause 6.2.2

RRCResume is an RRC message of 3GPP TS 38.331 (38331), the 5G NR Radio Resource Control (RRC) protocol.

First seen v15.3.0 (2018-09) · Last changed v19.1.0 (2026-01), in RRCResume-v1800-IEs

Definition

The RRCResume message is used to resume the suspended RRC connection.

RRCResume ::=                       SEQUENCE {
    rrc-TransactionIdentifier           RRC-TransactionIdentifier,
    criticalExtensions                  CHOICE {
        rrcResume                           RRCResume-IEs,
        criticalExtensionsFuture            SEQUENCE {}
    }
}

Fields (4)

Field	Description
rrc-TransactionIdentifier RRC-TransactionIdentifier
criticalExtensions CHOICE {
rrcResume RRCResume-IEs
criticalExtensionsFuture SEQUENCE {}

Fields of RRCResume-IEs (6)

Field	Description
radioBearerConfig RadioBearerConfig · OPTIONAL Need M	Configuration of Radio Bearers (DRBs, SRBs, multicast MRBs) including SDAP/PDCP.
masterCellGroup OCTET STRING (CONTAINING CellGroupConfig) · OPTIONAL Need M	Configuration of the master cell group.
measConfig MeasConfig · OPTIONAL Need M
fullConfig ENUMERATED {true} · OPTIONAL Need N
lateNonCriticalExtension OCTET STRING · OPTIONAL
nonCriticalExtension RRCResume-v1560-IEs · OPTIONAL

Fields of RRCResume-v1560-IEs (3)

Field	Description
radioBearerConfig2 OCTET STRING (CONTAINING RadioBearerConfig) · OPTIONAL Need M since v15.6.0	Configuration of Radio Bearers (DRBs, SRBs) including SDAP/PDCP. This field can only be used if the UE supports NR-DC or NE-DC.
sk-Counter SK-Counter · OPTIONAL Need N since v15.6.0	A counter used to derive S-K gNB or S-K eNB based on the newly derived K gNB during RRC Resume. The field is only included when there is one or more RB with keyToUse set to secondary or mrdc-SecondaryCellGroup is included.
nonCriticalExtension RRCResume-v1610-IEs · OPTIONAL since v15.6.0

Fields of RRCResume-v1610-IEs (8)

Field	Description
idleModeMeasurementReq-r16 ENUMERATED {true} · OPTIONAL Need N since v16.1.0	This field indicates that the UE shall report the idle/inactive measurements, if available, to the network in the RRCResumeComplete message
restoreMCG-SCells-r16 ENUMERATED {true} · OPTIONAL Need N since v16.1.0	Indicates that the UE shall restore the MCG SCells from the UE Inactive AS Context, if stored.
restoreSCG-r16 ENUMERATED {true} · OPTIONAL Need N since v16.1.0	Indicates that the UE shall restore the SCG configurations from the UE Inactive AS Context, if stored.
mrdc-SecondaryCellGroup-r16 CHOICE { · OPTIONAL Cond RestoreSCG since v16.1.0	Includes an RRC message for SCG configuration in NR-DC or NE-DC. For NR-DC ( nr-SCG ), mrdc-SecondaryCellGroup contains the RRCReconfiguration message as generated (entirely) by SN gNB. In this version of the specification, the RRC message can only include fields secondaryCellGroup (with at least reconfigurationWithSync ) , otherConfig and measConfig . For NE-DC ( eutra-SCG ), mrdc-SecondaryCellGroup includes the E-UTRA RRCConnectionReconfiguration message as specified in TS 36.331 [10]. In this version of the specification, the E-UTRA RRC message only include the field scg-Configuration with at least mobilityControlInfoSCG .
nr-SCG-r16 OCTET STRING (CONTAINING RRCReconfiguration) since v16.1.0
eutra-SCG-r16 OCTET STRING since v16.1.0
needForGapsConfigNR-r16 SetupRelease {NeedForGapsConfigNR-r16} · OPTIONAL Need M since v16.1.0	Configuration for the UE to report measurement gap requirement information of NR target bands in the RRCReconfigurationComplete and RRCResumeComplete message.
nonCriticalExtension RRCResume-v1700-IEs · OPTIONAL since v16.1.0

Fields of RRCResume-v1700-IEs (7)

Field	Description
sl-ConfigDedicatedNR-r17 SetupRelease {SL-ConfigDedicatedNR-r16} · OPTIONAL Cond L2RemoteUE since v17.0.0	This field is used to provide the dedicated configurations for NR sidelink communication/discovery used by L2 U2N Remote UE.
sl-L2RemoteUE-Config-r17 SetupRelease {SL-L2RemoteUE-Config-r17} · OPTIONAL Cond L2RemoteUE since v17.1.0	Contains L2 U2N relay operation related configurations used by L2 U2N Remote UE. The field is absent if appLayerMeasConfig or SRB4 is configured/not released.
needForGapNCSG-ConfigNR-r17 SetupRelease {NeedForGapNCSG-ConfigNR-r17} · OPTIONAL Need M since v17.1.0	Configuration for the UE to report measurement gap and NCSG requirement information of NR target bands in the RRCReconfigurationComplete and RRCResumeComplete message.
needForGapNCSG-ConfigEUTRA-r17 SetupRelease {NeedForGapNCSG-ConfigEUTRA-r17} · OPTIONAL Need M since v17.1.0	Configuration for the UE to report measurement gap and NCSG requirement information of E-UTRA target bands in the RRCReconfigurationComplete and RRCResumeComplete message.
scg-State-r17 ENUMERATED {deactivated} · OPTIONAL Need S since v17.0.0	Indicates that the SCG is in deactivated state.
appLayerMeasConfig-r17 AppLayerMeasConfig-r17 · OPTIONAL Need M since v17.0.0	This field is used to configure application layer measurements. This field is absent when the UE is configured to operate with shared spectrum channel access.
nonCriticalExtension RRCResume-v1800-IEs · OPTIONAL since v17.0.0

Fields of RRCResume-v1800-IEs (4)

Field	Description
needForInterruptionConfigNR-r18 ENUMERATED { disabled, enabled } · OPTIONAL Need M since v18.0.0	Indicates whether the UE shall report interruption requirement information of NR target bands in the RRCReconfigurationComplete and RRCResumeComplete message. The network sets this field to enabled only if the needForGapsConfigNR is configured. The network sets this field to disabled if the needForGapsConfigNR is released.
reselectionMeasurementReq-r18 ENUMERATED { true } · OPTIONAL Need N since v18.1.0	This field indicates that the UE shall report the reselection measurements, if available, to the network in the RRCResumeComplete message.
validatedMeasurementsReq-r18 ENUMERATED { true } · OPTIONAL Need N since v18.2.0
nonCriticalExtension RRCResume-v1910-IEs · OPTIONAL since v18.0.0

Fields of RRCResume-v1910-IEs (2)

Field	Description
assisted-SSB-MTC-MG-Config-r19 SetupRelease {Assisted-SSB-MTC-MG-Config-r19} · OPTIONAL Need M since v19.1.0
nonCriticalExtension SEQUENCE {} · OPTIONAL since v19.1.0

Used by (1)

DL-DCCH-MessageType