A first transmission controller (13) causes a second base station (7) to transmit first configuration information (CFG1) regarding a first cell (11) using a radio channel capable of being received by at least one first base station (1). A second transmission controller (14) selects a base station from among the at least one first base station (1), and transmits second configuration information (CFG2) regarding the first cell (11) to the selected base station from a higher-level network (15) via an access line (16).