To provide a communication control method for control signal management based on a reject cause related to a DN authentication procedure, in particular, other than congestion management. Based on a reject cause value indicating DN authentication failure, transmission of a new PDU session establishment message using a parameter identical to the DNN included in a rejected PDU session establishment message is suppressed. In addition, transmission of a new PDU session establishment message using information identical to the combination of the DNN and the S-NSSAI included in the rejected PDU session establishment message is suppressed.
UE AND SMF