| Protocol | nas | Network | 5g |
|---|---|---|---|
| Spec | 3GPP TS 24.501 | Spec Section | 8.2.19 |
| Direction | UE to AMF | Message Type | 5GMM signaling |
| Full message name | 5G NAS - Configuration Update Complete |
|---|---|
| Protocol | NAS |
| Technology | 5G |
| Direction | UE to AMF |
| Interface | N1 |
| Signaling bearer / channel | NAS signaling / Dedicated NAS message, commonly via UL Information Transfer |
| Typical trigger | Sent after receiving Configuration Update Command when acknowledgement is requested. |
| Main purpose | Confirms completion of the generic UE configuration update procedure from the UE side. |
| Main specification | 3GPP TS 24.501, 8.2.19 |
| Release added | Release 15 |
| Procedures where used | Generic UE Configuration Update |
| Related timers | T3555 |
Configuration Update Complete is the UE's NAS acknowledgement that a network-initiated configuration update was received and applied.
Confirms completion of the generic UE configuration update procedure from the UE side.
Configuration Update Complete is the UE confirming that it received and accepted a network configuration update.
Call flow position: UE acknowledgement at the end of the network-initiated configuration update exchange.
Typical state: UE remains in registered state.
Preconditions:
Next likely message: Normal registered-state operation or a later requested registration procedure
Previous message(s): Configuration Update Command
Next message(s): Normal registered operation, Registration procedure if separately requested
Security context: Normally sent in registered state with NAS security active.
This message is not typically analyzed as ASN.1 on the wire. It is usually read as a NAS or protocol field structure instead.
Configuration Update Complete is a NAS 24.501 message, not ASN.1.
Configuration Update Complete
Extended Protocol Discriminator: 5G Mobility Management
Security Header Type: Integrity protected and ciphered
Message Type: Configuration Update Complete
Likely cause: Configuration Update Complete may be missing, lost on the uplink path, or not accepted by the AMF.
What to inspect: Check uplink NAS delivery and T3555 behavior.
Next step: Compare later UE behavior against whether the network actually received the completion.
It acknowledges that the UE received and applied Configuration Update Command.
Decode this message with the 3GPP Decoder, inspect the related message database, or open the matching call flow to see where this signaling step fits in the full procedure.