Data transmission device, REPEATER device, data transmission/reception device, and data communication method

摘要

The error status of a data reception device (201) or a gateway (203) is notified from the data reception device (201) or the gateway (203) to a data transmission device (202) via network 1 (204) and network 2 (205). According to the error status, the data transmission device (202) also uses a packet length matching the error rate to receive packets through a high-level protocol common to network 1 (204) and network 2 (205). This reduces the packet loss rate in the high-level protocol common to the network 1 (204) and network 2 (205).