PDU Session Resource Release Command Transfer IE
For each PDU session resource to be released, SMF includes PDU Session Resource Release Command Transfer IE with a cause value. This value includes details on cause for the release to NG-RAN.
The PDU Session Resource Release Command Transfer IE includes the following causes and their cause values:
Cause | Cause Value |
Details |
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NAS |
Normal Release |
SMF includes this cause for the UE-initiated PDU Session release. |
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Deregister |
SMF includes this cause for the UDM-initiated PDU Session release. |
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Radio Network Layer |
Release due to 5GC generated reason |
SMF includes this cause for both the network-initiated PDU Session release and the internal failure cases. |
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