3GPP 38.300 v19.3.0 — the document's own text
16.18.5 Interference Detection and Mitigation for Aerial UE Communication
For interference detection, an Aerial UE can be configured with RRM event A3, A4, A5 or AxHy that triggers measurement report when individual (per cell) RSRP/RSRQ/SINR values (for events A3, A4, A5) or RSRP/RSRQ/SINR and measured Aerial UE's altitude (for events AxHy) for a configured number of cells fulfil the configured event. Once such condition is met and a measurement report is sent, the list of triggered cells is updated when subsequent cell(s) fulfil the event. However, further measurement reports are not sent while the list of triggered cells remains larger than or equal to the configured number of cells unless reportOnLeave is configured (see TS 38.331 [12] for details).