LTE RRC Messages – Complete E-UTRA RRC Message List & Procedures

Essential broadcast anchor for LTE cell acquisition.

Broadcast container for scheduled LTE SIB content.

Bandwidth-reduced system information for later LTE releases.

MBMS-specific system information broadcast.

Cell access, identity, scheduling, and selection information.

Common radio resource configuration for access and idle behavior.

Intra-frequency cell reselection parameters.

Intra-frequency neighboring cell information.

Inter-frequency reselection and neighboring frequency information.

UTRA inter-RAT reselection information.

GERAN inter-RAT reselection information.

CDMA2000 interworking and reselection information.

MBMS and MBSFN service acquisition information.

Idle or connected paging notification for UE reachability and system information changes.

UE request to establish an LTE RRC connection.

eNodeB setup message for initial SRB configuration.

UE confirmation that setup is complete, often carrying initial NAS.

Rejects the connection attempt with wait handling.

Network command to activate LTE AS security.

UE confirmation that AS security activation succeeded.

UE report that AS security activation failed.

Downlink RRC container for NAS or dedicated information.

Uplink RRC container for NAS or dedicated information.

Downlink segmentation container for large dedicated payloads.

Uplink segmentation container for large dedicated payloads.

Configures connected-mode radio bearers, mobility, measurements, and features.

UE confirmation that reconfiguration was applied.

Requests PDCP COUNT verification for DRBs.

UE response to the counter check procedure.

UE measurement result used for mobility and optimization decisions.

Commands the UE to leave LTE toward another RAT.

UE message carrying inter-RAT handover preparation information.

Uplink handover preparation transfer for cdma2000 interworking.

Configures UE logged measurement collection.

Reports inter-frequency RSTD measurement handling.

Reports application-layer measurement information.

UE request to recover the RRC connection.

Network acceptance and recovery configuration.

UE confirmation that recovery completed.

Network rejection of the recovery attempt.

Releases the LTE RRC connection.

Request message used in LTE early data procedures.

Completion message for LTE early data handling.

Network request for UE radio access capabilities.

UE response containing supported LTE radio capabilities.

UE assistance information for connected-mode optimization.

UE in-device coexistence assistance indication.

MBMS-specific master information block.

Broadcast configuration for MBSFN areas.

Network request to count interested MBMS UEs.

UE response to MBMS counting.

UE indication of interest in MBMS services.

MBMS-related system information broadcast.

Network request for cdma2000 CSFB parameters.

UE response containing cdma2000 CSFB parameters.

Preparation message for inter-RAT handover.

Uplink handover preparation transfer for cdma2000.

CDMA2000 interworking and reselection information.

UE sidelink information and resource request message.

UE failure report for Release 15 diagnostics.

UE failure report for Release 16 diagnostics.

UE report for master cell group failure.

Network request for UE diagnostic information.

UE response carrying requested diagnostic information.

Bandwidth-reduced system information.

Downlink segmentation container for dedicated messages.

Uplink segmentation container for dedicated messages.

Application-layer measurement report.

Early data request message.

Early data completion message.

Uplink LTE RRC message sent by the UE to confirm that the resume branch completed successfully and the suspended context was restored.

Uplink LTE RRC message sent by the UE to request continuation of a suspended LTE context without starting a full fresh connection setup.

Downlink LTE RRC message sent by the eNodeB to resume a suspended LTE connection context without starting a full fresh connection setup.

Uplink LTE RRC message used by the UE to report proximity-related status relevant to network-controlled proximity services handling.

Downlink LTE RRC message used to request or deliver PUR-related configuration handling.

Uplink LTE RRC message used by the relay node to acknowledge RNReconfiguration-r10.

Downlink LTE RRC message used by a donor eNodeB to change relay-node specific configuration.

Uplink LTE RRC message used in E-UTRA master / NR secondary contexts when the UE reports failure affecting the NR-side secondary cell group.

Uplink LTE RRC message used by the UE to report secondary cell group failure in dual-connectivity related LTE contexts.

Downlink LTE RRC message used to deliver SC-PTM configuration for bandwidth-reduced UE contexts.

Downlink LTE RRC message used to deliver SC-PTM configuration to the UE.

Broadcast LTE RRC message carrying the first BR-specific system-information block.

Broadcast LTE RRC message carrying the first MBMS-specific system-information block.

Uplink LTE RRC message used to transfer dedicated information in inter-RAT related contexts.

Uplink LTE RRC message used to transfer dedicated information in MR-DC related contexts.

Uplink LTE RRC message used by the UE to report WLAN connection status relevant to LTE and WLAN interworking handling.