A base station controlling apparatus 10a that causes a plurality of base stations 12a to synchronously distribute a plurality of packet data to a mobile terminal, including: a receiver S12 that receives a plurality of packet data; a transition information generator S14 that generates transition information corresponding to a sequence number of packet data used for switching a compression state when the plurality of packet data are compressed; a compressor S20 that compresses the plurality of packet data based on the transition information; and a transmitter that transmits the plurality of compressed packet data to the plurality of base stations, and transmits the transition information to another base station controlling apparatus.