A disclosed base station apparatus includes a resource allocation unit allocating radio resources using a first resource allocation method for dynamically allocating the radio resources and a second resource allocation method for allocating the radio resources at a constant period, wherein when a size of data to be transmitted is equal to or greater than a first threshold value, the resource allocation unit allocates the radio resources using the first resource allocation method, otherwise, the resource allocation unit allocates the radio resources using the second resource allocation method, and when the size of the data to be transmitted is equal to or greater than a second threshold value, the resource allocation unit allocates radio resources reserved as radio resources to be allocated using the second resource allocation method as radio resources to be allocated using the first resource allocation method.