Section: 6.3.1A.4 Abnormal cases on the network side
Content: The following abnormal cases can be identified: a) Expiry of timer T3594. On the first expiry of the timer T3594, the SMF shall resend the SERVICE-LEVEL AUTHENTICATION COMMAND message and shall reset and restart timer T3594. This retransmission is repeated four times, i.e., on the fifth expiry of timer T3594, the SMF shall abort the procedure and send PDU SESSION ESTABLISHMENT REJECT message with the 5GSM cause #29 "user authentication or authorization failed" as specified in subclause 6.4.1.4.1.