Section: 5.6.15 Triggers for network analytics
Content: Triggers for the SMF to request for or subscribe to the analytics information from the NWDAF are internal logic may include for example: - UE PDU Session related event subscription by other NFs (e.g. AMF, NEF); - UE access and mobility event reports from the AMF; - locally detected events; - analytics information received. The trigger conditions may depend on operator and implementation policy in the SMF. When a trigger condition happens, the SMF may decide if any analytics information is needed and if so, request for or subscription to the analytics information from the NWDAF. The SMF may, upon detection of certain local events, e.g. number of PDU sessions establishment or released reaches a threshold in a specific area, request for or subscribe to network analytics related to "Abnormal behaviour" as described in TS 23.288[ Architecture enhancements for 5G System (5GS) to support network data analytics services ]  [86] to detect whether there are any exceptional UE behaviours in this area.