Section: 6.3.1.2.4 Abnormal cases in the UE
Content: The following abnormal cases can be identified: a) PDU session inactive for the received PDU session ID. If the PDU session ID in the PDU SESSION AUTHENTICATION COMMAND message belongs to any PDU session in state PDU SESSION INACTIVE in the UE, the UE shall send a 5GSM STATUS message with the 5GSM cause IE set to #43 "Invalid PDU session identity". b) Collision of UE-requested PDU session release procedure and a PDU session authentication and authorization procedure. When the UE receives a PDU SESSION AUTHENTICATION COMMAND message during the UE-requested PDU session release procedure, and the PDU session indicated in PDU SESSION AUTHENTICATION COMMAND message is the PDU session that the UE had requested to release, the UE shall ignore the PDU SESSION AUTHENTICATION COMMAND message and proceed with the UE-requested PDU session release procedure.