US Patent 11405925 Reducing interference from devices at extraordinary altitudes

A method of reducing interference in a mobile communication system caused by a first user equipment, UE, device operating in a cell at a significantly higher altitude than other UE devices in the cell so as to cause interference, the method comprising detecting that the first UE device is operating at an altitude considered by the mobile communication system to be an extraordinary altitude; and reducing interference caused by the first UE device operating at the extraordinary altitude by controlling the operation of the first UE device.