To provide a data distribution system which can efficiently give a data retransmission request with respect to the transmission error of data transmitted from a data distribution center device through a broadcast line.
A reception error detection part 22 detects the transmission error of broadcast data received through a broadcast data block reception part 21. When a transmission error occurs, a probability retransmission request indication part 24 gives a retransmission request in terms of probability and the retransmission requests are prevented from being concentrated. A retransmission request terminal scale estimation part 15 estimates the number of terminals to which the retransmission requests are given. When the number of terminals is small, data are individually transmitted from a specified block retransmission part 17. When the estimation number of terminals is large, broadcast data are broadcast again from a rebroadcast interruption processing part 13.
KISHIDA KATSUMI
WATABE TOMOKI
MARUYAMA KOICHI
Next Patent: CONTAINER RELATION SCREEN DISPLAY METHOD