Popular Messages

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

NGAP 5G

5G NR - Initial UE Message

NGAP initiating message used by the NG-RAN to transfer the UE's first uplink NAS message to the AMF.

NG-RAN -> AMF 3GPP TS 38.413

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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

NAS 5G

5G NR - Registration Request

Starts a 5G registration or mobility update by sending UE identity and registration intent to the core.

UE to AMF 3GPP TS 24.501