5G NAS Messages
NAS messages connect the UE to the 5G core for mobility, authentication, and session handling.
This category focuses on UE-to-AMF signaling such as registration, authentication, and service management.
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All Messages in This Category
This is the full published list for the NAS category. Use the filter section above for a narrower interactive view.
5G NAS - 5GSM Status
5GSM Status is the 5GSM message used by both the UE and the network to report protocol errors or invalid session-management conditions for an active PDU session.
5G NAS - Authentication Failure
Authentication Failure is the UE's NAS message indicating that it could not validate or complete the network authentication challenge.
5G NAS - Authentication Reject
Authentication Reject is the NAS message the network sends when the UE's authentication attempt is not accepted and the current 5GMM path must stop.
5G NAS - Authentication Request
Authentication Request is the NAS message the AMF uses to challenge the UE and start the 5G primary authentication procedure.
5G NAS - Authentication Response
Authentication Response is the UE's NAS reply to Authentication Request, carrying the computed response or EAP data needed for subscriber verification.
5G NAS - Authentication Result
Authentication Result is the NAS message used to transport the final EAP authentication result from the network to the UE.
5G NAS - Configuration Update Command
Configuration Update Command is the network-initiated NAS message used to update UE 5GMM context after registration.
5G NAS - Configuration Update Complete
Configuration Update Complete is the UE's NAS acknowledgement that a network-initiated configuration update was received and applied.
5G NAS - Control Plane Service Request
Control Plane Service Request is the NAS message used when the UE requests control-plane service handling without the normal user-plane service path.
5G NAS - Deregistration Accept (UE Originating)
Deregistration Accept (UE Originating) is the AMF response confirming that the UE-originated deregistration request was accepted.
5G NAS - Deregistration Accept (UE Terminated)
Deregistration Accept (UE Terminated) is the UE response confirming that a network-initiated deregistration request was received and accepted.
5G NAS - Deregistration Request (UE Originating)
Deregistration Request (UE Originating) is the NAS message the UE sends when it wants to deregister from the 5GS.
5G NAS - Deregistration Request (UE Terminated)
Deregistration Request (UE Terminated) is the AMF-to-UE NAS message used when the network initiates deregistration.
5G NAS - DL NAS Transport
DL NAS Transport is the NAS wrapper message the network uses to deliver a payload downward to the UE when the procedure needs to carry additional content transparently through NAS.
5G NAS - Identity Request
Identity Request is the NAS message the network sends when it needs the UE to provide a specific identity such as SUCI, 5G-GUTI-related context, IMEI, IMEISV, or other identity information.
5G NAS - Identity Response
Identity Response is the NAS message the UE sends after Identity Request to provide the specific identity type the network asked for, such as SUCI, IMEI, IMEISV, or another requested identifier.
5G NAS - Network Slice-Specific Authentication Command
Network Slice-Specific Authentication Command is the NAS message the network uses to start slice-specific authentication for a requested S-NSSAI.
5G NAS - Network Slice-Specific Authentication Complete
Network Slice-Specific Authentication Complete is the UE's response carrying the slice-specific authentication reply for the requested S-NSSAI.
5G NAS - Network Slice-Specific Authentication Result
Network Slice-Specific Authentication Result is the NAS message carrying the final outcome of slice-specific authentication for a requested S-NSSAI.
5G NAS - Notification
Notification is the NAS message the network sends to inform the UE about an event that requires the UE's attention in the current mobility-management context.
5G NAS - Notification Response
Notification Response is the NAS message the UE sends after receiving Notification from the network to acknowledge the NAS indication and let the protected procedure continue.
5G NAS - PDU Session Authentication Command
PDU Session Authentication Command is the 5GSM message that carries an EAP request from the SMF to the UE when session-level authentication or authorization is required.
5G NAS - PDU Session Authentication Complete
PDU Session Authentication Complete is the 5GSM message the UE sends in response to PDU Session Authentication Command to carry the EAP response and continue the session-authentication exchange.
5G NAS - PDU Session Authentication Result
PDU Session Authentication Result is the 5GSM message the SMF sends to indicate a successful outcome of PDU session authentication, and it can also carry an EAP-success when external DN authentication is used.
5G NAS - PDU Session Establishment Accept
PDU Session Establishment Accept is the 5GSM success message the network sends after it creates the requested PDU session and returns the final session parameters, address, and QoS context.
5G NAS - PDU Session Establishment Reject
PDU Session Establishment Reject is the 5GSM failure response the network sends when the requested PDU session cannot be created and the UE needs the rejection reason.
5G NAS - PDU Session Establishment Request
PDU Session Establishment Request is the 5GSM message the UE sends to request creation of a new PDU session for user-plane connectivity toward a DNN on a selected slice.
5G NAS - PDU Session Modification Command
PDU Session Modification Command is the 5GSM message the network sends to tell the UE how an active PDU session should be updated after the modification request is accepted or when the network itself is changing the session.
5G NAS - PDU Session Modification Command Reject
PDU Session Modification Command Reject is the 5GSM message the UE sends when it cannot accept the network's modification command for an active PDU session.
5G NAS - PDU Session Modification Complete
PDU Session Modification Complete is the 5GSM message the UE sends after it applies the network-approved changes to an active PDU session.
5G NAS - PDU Session Modification Reject
PDU Session Modification Reject is the 5GSM failure response the network sends when a UE-requested change to an active PDU session cannot be accepted.
5G NAS - PDU Session Modification Request
PDU Session Modification Request is the 5GSM message the UE sends to change an already active PDU session, such as updating QoS, packet-filter behavior, header-compression settings, or other session parameters.
5G NAS - PDU Session Release Command
PDU Session Release Command is the 5GSM message the network sends to tell the UE that an active PDU session is being released and to provide any release-related cause or retry guidance.
5G NAS - PDU Session Release Complete
PDU Session Release Complete is the 5GSM message the UE sends after it receives a release command and considers the active PDU session released.
5G NAS - PDU Session Release Reject
PDU Session Release Reject is the 5GSM failure response the network sends when it does not accept the UE's request to release an active PDU session.
5G NAS - PDU Session Release Request
PDU Session Release Request is the 5GSM message the UE sends when it wants to end an already active PDU session, or when it needs to release the session because of a local protocol or service condition.
5G NAS - Registration Accept
Registration Accept is the 5GMM message the AMF sends when it accepts UE registration and returns the mobility, security, and reachability context the UE needs to operate in the 5GS.
5G NAS - Registration Complete
Registration Complete is the UE-to-AMF NAS message used to confirm that the UE has accepted the registration context returned by the network.
5G NAS - Registration Reject
Registration Reject is the NAS message the AMF sends when a 5G registration attempt is refused and the UE must stop the current registration path.
5G NAS - Registration Request
Starts a 5G registration or mobility update by sending UE identity and registration intent to the core.
5G NAS - Relay Authentication Request
Relay Authentication Request is the NAS message the network sends to start or continue the relay-specific authentication branch after relay-key handling or related relay security preparation.
5G NAS - Relay Authentication Response
Relay Authentication Response is the NAS message the UE or relay participant sends back after Relay Authentication Request to return the relay-specific authentication result information.
5G NAS - Relay Key Accept
Relay Key Accept is the NAS message the network sends when the relay key request succeeds and the relay-related key response material can be delivered to the UE.
5G NAS - Relay Key Reject
Relay Key Reject is the NAS message the network sends when the relay key request cannot be accepted and the relay-related key procedure must stop or take a failure branch.
5G NAS - Relay Key Request
Relay Key Request is the NAS message used to request relay-related keying material so the relay security procedure can continue in a 5G relay or ProSe relay context.
5G NAS - Remote UE Report
Remote UE Report is the 5GSM message the relay UE sends to inform the network that one or more 5G ProSe remote UEs connected or disconnected through the relay.
5G NAS - Remote UE Report Response
Remote UE Report Response is the 5GSM acknowledgement sent back to the relay UE after the SMF processes a Remote UE Report.
5G NAS - Security Mode Command
Security Mode Command is the NAS message the AMF sends to activate the selected NAS security algorithms and move the 5GMM procedure into a protected signaling state.
5G NAS - Security Mode Complete
Security Mode Complete is the NAS message the UE sends to confirm that it accepted the selected NAS security algorithms and has switched into the commanded protected signaling state.
5G NAS - Security Mode Reject
Security Mode Reject is the NAS message the UE sends when it cannot accept the NAS security configuration selected by the AMF in Security Mode Command.
5G NAS - Service Accept
Service Accept is the NAS message confirming that the network accepted the UE's service request and that active service can continue.
5G NAS - Service Reject
Service Reject is the NAS message the network sends when a service request is refused even though the UE already has registration context.
5G NAS - Service Request
Service Request is the NAS message the UE uses to request service resumption when it already has a valid registration context but needs active signaling again.
5G NAS - Service-level Authentication Command
Service-level Authentication Command is the 5GSM message the SMF sends to deliver service-level authentication and authorization payload to the UE.
5G NAS - Service-level Authentication Complete
Service-level Authentication Complete is the 5GSM message the UE sends in response to Service-level Authentication Command and uses to return the service-level AA payload or response.
5G NAS - UL NAS Transport
UL NAS Transport is the NAS wrapper message the UE uses to send a payload upward toward the core when the NAS procedure needs to carry additional information transparently.