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Popular Messages
5G NAS - Registration Request
Starts a 5G registration or mobility update by sending UE identity and registration intent to the core.
5G NGAP - Downlink NAS Transport
Downlink NAS Transport is the NGAP message the AMF uses to carry a downlink NAS message toward the UE through the NG-RAN over the N2 interface.
5G NR - RRC Setup
Downlink NR RRC message sent by the gNB to establish SRB1 and move the UE into the connected RRC procedure.
5G NGAP - Uplink NAS Transport
Uplink NAS Transport is the NGAP message the NG-RAN uses to carry a subsequent uplink NAS message from the UE toward the AMF over the N2 interface after the initial access is already established.
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.
5G NGAP - Initial Context Setup Request
Initial Context Setup Request is the NGAP message the AMF sends to NG-RAN to establish UE context, security, and initial PDU session resources after successful NAS entry and core-side authentication steps.
LTE Attach Request
Attach Request is the EPS NAS message the UE uses to start the LTE attach procedure and ask the network to create EPS mobility-management context.
5G NGAP - NAS Non Delivery Indication
NAS Non Delivery Indication is the NGAP message the NG-RAN sends to the AMF when a downlink NAS message cannot be delivered to the UE.
LTE RRC Connection Setup
Downlink LTE RRC message sent by the eNodeB to establish SRB1 and move the UE into connected-mode signaling.
LTE RRC SIB1 - System Information Block Type 1
Broadcast LTE RRC message on BCCH and DL-SCH that gives the UE the essential access identity, cell selection, scheduling, and change-detection context needed before it can use the wider SIB set.
5G NGAP - NG Setup Request
NG Setup Request is the NGAP interface-management message the NG-RAN sends to the AMF to establish or re-establish NG-C application-layer connectivity and advertise the RAN node identity, supported tracking areas, PLMNs, slice support, and paging defaults.
5G NGAP - Paging
Paging is the NGAP message the AMF sends to NG-RAN to trigger UE reachability attempts in one or more tracking areas when the UE is not currently on an active UE-associated N2 signaling connection.
5G NGAP - Initial Context Setup Response
Initial Context Setup Response is the NGAP message the NG-RAN sends to AMF to report successful or partial completion of the Initial Context Setup Request, including per-session setup outcomes.
5G NGAP - NG Setup Response
NG Setup Response is the AMF-to-NG-RAN successful-outcome message that confirms NG-C setup and returns served AMF identity, PLMN and slice support, relative AMF capacity, optional transport-layer association updates, and optional capability indicators.
5G NGAP - PDU Session Resource Setup Request
PDU Session Resource Setup Request is the NGAP message the AMF sends to NG-RAN to request Uu and NG-U resources, DRBs, and QoS flow handling for one or more PDU sessions of an already identified UE.
5G NGAP - Reroute NAS Request
Reroute NAS Request is the NGAP message the AMF sends to NG-RAN when the UE's NAS signaling should be rerouted toward a different AMF selection path.
5G NGAP - UE Context Release Command
UE Context Release Command is the NGAP message the AMF sends to NG-RAN to order release of the UE-associated logical NG connection and associated access-side context.
5G NGAP - NG Setup Failure
NG Setup Failure is the AMF-to-NG-RAN unsuccessful-outcome message used to reject NG Setup and return the failure Cause plus optional Time to Wait and optional Criticality Diagnostics.
5G XnAP - Handover Request
Handover Request is the XnAP message the source NG-RAN node sends to the target NG-RAN node to request preparation of resources for an incoming handover on the Xn interface.
5G NGAP - Handover Required
Handover Required is the NGAP message the source NG-RAN sends to the AMF to request preparation of resources at the target during AMF-mediated mobility procedures.
5G NGAP - Initial Context Setup Failure
Initial Context Setup Failure is the NGAP message the NG-RAN sends to AMF when the Initial Context Setup Request cannot be completed for the UE context or its requested setup state.
5G NGAP - PDU Session Resource Setup Response
PDU Session Resource Setup Response is the NGAP message the NG-RAN sends to AMF to report which requested PDU session resources were successfully established and which failed.
5G NGAP - UE Context Release Complete
UE Context Release Complete is the NGAP message the NG-RAN sends to AMF to confirm that the targeted UE-associated logical NG connection has been released.
5G NGAP - RAN Configuration Update
RAN Configuration Update is the NG-RAN-to-AMF interface-management message used to transfer updated NG-C application-level configuration such as Supported TA List, paging DRX, Global RAN Node ID, node naming, and TNL association removal information.