Patent ID: 7483997

Claim:
A data distribution management device provided on a transmission route between first and second terminal devices, the first terminal device performing communication with the second terminal device, the data distribution management device comprising: a transfer unit that controls transfer data from the first terminal device to the second terminal device; a returning unit which prepares a delivery acknowledgement corresponding to the data transferred from the first terminal device and sends the delivery acknowledgement to the first terminal device; a decision unit that makes a decision whether the destination of the data transferred from the first terminal device passes through an error-prone circuit; and a management control unit that controls the returning unit to send the delivery acknowledgement to the first terminal device and controls the transfer unit to transfer the data to the second terminal device when the decision results in that the destination passes through the error-prone circuit, wherein the management control unit determines the error-prone circuit based on whether a bit error rate between the data distribution management device and the second terminal device is higher than a bit error rate of the circuit between the first terminal device and the data distribution management device.