<p>A base station device which communicates with a user device that transmits an uplink signal by using a single carrier system comprises frequency hopping determination means for determining whether to apply a frequency hopping to the user device according to propagation information on an electric wave transmitted from the user device and a data traffic type transmitted by the user device, a scheduler for assigning a frequency according to a reception condition of the uplink channel of the user device, and notification means for performing a notification of the resource unit assignment information decided by performing the scheduling. When the frequency hopping determination means decides to apply the frequency hopping, the scheduler assigns a resource unit whose band is different for each slot by one resource unit.</p>