A.21 Monitoring of PDU session releases

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The PDU session release may be released by the UE, SMF or AMF. When a PDU session is released by an unexpected reason, the user service would be impacted. The PDU session releases initiated by the UE and SMF are usually triggered by normal reason (e.g., UE deregistration, under request from DN, etc.). The PDU session releases initiated by AMF may be due to an abnormal reason (e.g., mismatch of PDU Session status between UE and AMF). Therefore the PDU session releases initiated by AMF need to be monitored.