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NR RRC Messages

NR RRC messages manage radio control between the UE and gNB in 5G access.

Use this category to browse setup, reconfiguration, measurement, and mobility-related NR RRC signaling.

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5ggNB to UE
5G NR - RRC Reconfiguration

Reconfigures the UE radio connection after setup, including bearers, measurements, and mobility.

3GPP TS 38.331
5gUE -> gNB
5G NR - RRC Reestablishment Request

Uplink NR RRC message sent by the UE on SRB0 and CCCH to request re-establishment of an existing RRC connection after radio link failure, handover failure, or reconfiguration failure.

3GPP TS 38.331
5ggNB -> UE
5G NR - RRC Setup

Downlink NR RRC message sent by the gNB to establish SRB1 and move the UE into the connected RRC procedure.

3GPP TS 38.331
5ggNB -> UE
5G NR - RRCReject

Downlink NR RRC message used by the network to reject an RRC connection establishment attempt or an RRC connection resumption attempt.

3GPP TS 38.331
5gUE -> gNB
5G NR - RRCSetupComplete

Uplink NR RRC message sent by the UE on SRB1 and DCCH to confirm successful RRC connection establishment and transfer the initial NAS message.

3GPP TS 38.331
5gUE -> gNB
5G NR - RRCSetupRequest

Uplink NR RRC message sent by the UE on SRB0 and CCCH to request establishment of an RRC connection.

3GPP TS 38.331
5ggNB -> UE
5G NR - SecurityModeCommand

Downlink NR RRC message used by the gNB to activate AS security for the UE in RRC_CONNECTED.

3GPP TS 38.331
5gUE -> gNB
5G NR - SecurityModeComplete

Uplink NR RRC message used by the UE to confirm successful activation of the selected AS security configuration.

3GPP TS 38.331
5gUE -> gNB
5G NR - SecurityModeFailure

Uplink NR RRC message used by the UE to indicate that the commanded AS security activation could not be completed successfully.

3GPP TS 38.331
5ggNB -> UE
5G NR - UECapabilityEnquiry

Downlink NR RRC message used by the gNB to request UE capability information needed for feature, bearer, mobility, and radio configuration decisions.

3GPP TS 38.331
5gUE -> gNB
5G NR - UECapabilityInformation

Uplink NR RRC message used by the UE to report its supported radio capability containers to the gNB.

3GPP TS 38.331

All Messages in This Category

This is the full published list for the RRC category. Use the filter section above for a narrower interactive view.

RRC 5G

5G NR - RRC Reconfiguration

Reconfigures the UE radio connection after setup, including bearers, measurements, and mobility.

gNB to UE 3GPP TS 38.331
RRC 5G

5G NR - RRC Reestablishment Request

Uplink NR RRC message sent by the UE on SRB0 and CCCH to request re-establishment of an existing RRC connection after radio link failure, handover failure, or reconfiguration failure.

UE -> gNB 3GPP TS 38.331
RRC 5G

5G NR - RRC Setup

Downlink NR RRC message sent by the gNB to establish SRB1 and move the UE into the connected RRC procedure.

gNB -> UE 3GPP TS 38.331
RRC 5G

5G NR - RRCReject

Downlink NR RRC message used by the network to reject an RRC connection establishment attempt or an RRC connection resumption attempt.

gNB -> UE 3GPP TS 38.331
RRC 5G

5G NR - RRCSetupComplete

Uplink NR RRC message sent by the UE on SRB1 and DCCH to confirm successful RRC connection establishment and transfer the initial NAS message.

UE -> gNB 3GPP TS 38.331
RRC 5G

5G NR - RRCSetupRequest

Uplink NR RRC message sent by the UE on SRB0 and CCCH to request establishment of an RRC connection.

UE -> gNB 3GPP TS 38.331
RRC 5G

5G NR - SecurityModeCommand

Downlink NR RRC message used by the gNB to activate AS security for the UE in RRC_CONNECTED.

gNB -> UE 3GPP TS 38.331
RRC 5G

5G NR - SecurityModeComplete

Uplink NR RRC message used by the UE to confirm successful activation of the selected AS security configuration.

UE -> gNB 3GPP TS 38.331
RRC 5G

5G NR - SecurityModeFailure

Uplink NR RRC message used by the UE to indicate that the commanded AS security activation could not be completed successfully.

UE -> gNB 3GPP TS 38.331
RRC 5G

5G NR - UECapabilityEnquiry

Downlink NR RRC message used by the gNB to request UE capability information needed for feature, bearer, mobility, and radio configuration decisions.

gNB -> UE 3GPP TS 38.331
RRC 5G

5G NR - UECapabilityInformation

Uplink NR RRC message used by the UE to report its supported radio capability containers to the gNB.

UE -> gNB 3GPP TS 38.331

Related Procedures