A base station apparatus corresponding to a first base station apparatus of base station apparatuses and connected to terminal apparatuses, first base station apparatus transmitting and receiving first packets with respect to a second base station apparatus corresponding to another of base station apparatuses and transmitting and receiving second packets with respect to terminal apparatuses, first base station apparatus transmits a third packet to second base station apparatus, third packet corresponding to one of first packets to be transmitted from first base station apparatus and including a first data item, second base station apparatus recognizing by first data item that first base station apparatus is one of base station apparatuses, third packet being used through an authentication process or an association process for connecting in wireless first base station apparatus to second base station apparatus.