3GPP 23.501 v20.2.0 — the document's own text
5.31.9 Support for Monitoring Events
Taught in 25. Small devices, small messages (The 5G system architecture, in depth).
The Monitoring Events feature is intended for monitoring of specific events in the 3GPP system and reporting such Monitoring Events via the NEF. The feature allows NFs in 5GS to be configured to detect specific events and report the events to the requested party. Clause 5.20 further discusses the Monitoring capabilities of the NEF.
For CIoT, the list of supported monitoring events is specified in Table 4.15.3.1-1 of TS 23.502 [3].
Support for Monitoring Events can be offered via AMF, UDM, NSACF and SMF and can be reported via the NEF, as specified in clause 4.15.3 of TS 23.502 [3].