A control device is provided, including: a relative-speed acquiring unit for acquiring relative speeds of a movable first mobile relaying apparatus and a movable second mobile relaying apparatus, which are camped on a cell of a wireless base station to relay communications between the wireless base station and a wireless communication terminal; and a determination unit for determining, based on the relative speeds, whether the second mobile relaying apparatus becomes a handover destination, from the first mobile relaying apparatus, of the wireless communication terminal camped on the first mobile relaying apparatus, or becomes a carrier-aggregation destination of the first mobile relaying apparatus for the wireless communication terminal camped on the first mobile relaying apparatus.