A game apparatus repeatedly switches between a doze state in which a wireless communication function is restricted, and an awake state. The game apparatus stores unicast data and broadcast data acquired in the awake state, in a normal queue, and transmits the pieces of data to air in acquisition order. On the other hand, in the doze state, the game apparatus stores acquired broadcast data in a preferential transmission queue, and stores acquired unicast data in the normal queue. Thereafter, when the game apparatus becomes the awake state again, the game apparatus transmits the broadcast data stored in the preferential transmission queue in preference to the unicast data stored in the normal queue.