Section: 16.18.6 Flight Path Information Reporting for Aerial UE Communication
Content: Following an indication from the Aerial UE that flight path information is available, NG-RAN can request the Aerial UE to report flight path information consisting of a number of waypoints defined as 3D locations, as defined in TS 37.355[ LTE Positioning Protocol (LPP) ]  [43]. Aerial UE reports up to a configured number of waypoints if flight path information is available at the UE. The report can also contain a time stamp per waypoint if configured by the NG-RAN and if available at the UE. The flight path information can be also provided by the source gNB to the target gNB during handover. If configured by the NG-RAN and if the associated distance- or time-based condition (see flightPathUpdateDistanceThr and flightPathUpdateTimeThr in TS 38.331[ NR; Radio Resource Control (RRC); Protocol specification ]  [12], respectively) for indication reporting are met for any of the waypoints, the Aerial UE indicates the availability of the updated flight path information. The Aerial UE can also indicate the availability of the updated flight path information if a new waypoint has been added or if a future waypoint has been removed from the flight path information.