| Protocol | nas | Network | 5g |
|---|---|---|---|
| Spec | 3GPP TS 24.501 | Spec Section | 8.2.14 |
| Direction | UE to AMF | Message Type | 5GMM signaling |
| Full message name | 5G NAS - Deregistration Accept (UE Terminated) |
|---|---|
| Protocol | NAS |
| Technology | 5G |
| Direction | UE to AMF |
| Interface | N1 |
| Signaling bearer / channel | NAS signaling / Dedicated NAS message, often via UL Information Transfer |
| Typical trigger | Sent in response to Deregistration Request (UE Terminated). |
| Main purpose | Confirms to the AMF that the UE processed the network-initiated deregistration and is leaving registered state. |
| Main specification | 3GPP TS 24.501, 8.2.14 |
| Release added | Release 15 |
| Procedures where used | Network-Initiated Deregistration |
Deregistration Accept (UE Terminated) is the UE response confirming that a network-initiated deregistration request was received and accepted.
Confirms to the AMF that the UE processed the network-initiated deregistration and is leaving registered state.
This is the UE confirming that it accepted the network's deregistration command.
Call flow position: UE confirmation at the end of a network-initiated deregistration exchange.
Typical state: UE is leaving registered state.
Preconditions:
Next likely message: No immediate follow-on NAS message in the normal basic path
Previous message(s): Deregistration Request (UE Terminated)
Next message(s): UE leaves registered state
Security context: Usually protected while the prior NAS security context is still valid.
This message is not typically analyzed as ASN.1 on the wire. It is usually read as a NAS or protocol field structure instead.
This message follows NAS 24.501 formatting rather than ASN.1.
Deregistration Accept (UE Terminated)
Extended Protocol Discriminator: 5G Mobility Management
Security Header Type: Integrity protected and ciphered
Message Type: Deregistration Accept (UE Terminated)
Likely cause: UE processing failure, uplink transport issue, or incomplete capture.
What to inspect: Check UL Information Transfer and later UE state behavior.
Next step: Correlate with subsequent registration attempts or radio loss.
The UE sends it after receiving Deregistration Request (UE Terminated) from the AMF.
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.