To improve efficiency of a radio section while reducing a no-communication period in the case of handoff in communication used DRC and DSC signals. A communication connection apparatus (BS) 200 provided in a communication system accumulates data transmitted from the communication control apparatus (BSC) 300. In a state in which a DSC signal from a communication terminal (AT) 100 designates an owed BS, when a DRC indication from the AT 100 is switched from another BS to the owned BS, the BS 200 transmits data received from the BSC 300 last to the AT 100 out of the data accumulated in the BS 200. Consequently, missing data is requested from the BS 200 at a handoff destination in accordance with a retransmission request function existing in the AT 100. Moreover, retransmission processing for data by a retransmission request message is performed in the BS 200.