A couple of weeks ago I posted my thoughts around doing throttling of heavy users directly at the base station so the current load can be taken into account as well. No need to throttle heavy users if nobody else is using the cell. While it was just a "Gedankenexperiment" a reader pointed my to this paper in which Ericsson actually describes just such an approach and says it has already implemented it in their RAN. Very interesting! The paper unfortunately doesn't contain a lot of information of how this is done from a technical point of view, i.e. how is the base station informed which users to prefer over others. If you know more, if this is not a state secret and some information about the feature is publicly available, please let me know!