When the provided large cell base station (100) is to allocate a resource block to a radio terminal (200) connected to said large cell base station (100), band-use restriction information that indicates use restrictions on the frequency band corresponding to the aforementioned resource block is transmitted to a small cell base station (300). The large cell base station (100) then allocates the resource block to the radio terminal (200) after an amount of time corresponding to the signal transmission delay from the large cell base station (100) to the small cell base station (300) has passed since the aforementioned transmission.