PURPOSE: To decrease a loss time by accumulating an ACK NACK signal from each receiving station, and determining the transmission sequence of a broadcast signal to be retransmitted, based on the total number of the NACK signal.

CONSTITUTION: At the time of transmitting continuously all of a series of multiple address signals to be transmitted by a transmitting station 11, with respect to each multiple address signal thereof, all the ACK/NACK signals that are sent back from each receiving station 12∼14 are accumulated in the memory device of the transmitting station. From these accumulated ACK/NACK signals, the total number of the NACK signal is derived at every receiving station, and multiple address signal is retransmitted successively in order of the receiving station in which said total number is small. As a result, it does not occur that the transmission of a signal to be transmitted originally is delayed due to a frequency retransmission processing executed to some receiving stations in which a line becomes a failure temporarily. Also, the retransmission processing to the receiving station whose line is good can be completed in a short time.