Industrial Ethernet-based data transmission system and method and communication device

摘要

An industrial Ethernet-based data transmission system comprises: a sending terminal for receiving a data packet, for sending the data packet to a receiving terminal in a forward direction according to an Ethernet connection via a first port of the sending terminal and for simultaneously sending the data packet to the receiving terminal via at least one intermediate terminal according to a reverse Ethernet connection via a second port of the transmitting terminal; an intermediate terminal for receiving the data packet sent by the transmitting terminal and for forwarding the data packet to an adjacent intermediate terminal and / or a receiving terminal on the Ethernet connection; and a receiving terminal for receiving the data packet transmitted by the transmitting terminal and / or a data packet transmitted by the receiving terminal adjacent intermediate terminal, and for receiving the data packet transmitted via the at least one intermediate terminal in accordance with the reverse Ethernet connection via the second port of the transmitting terminal is sent if a connection between the sending terminal and the receiving terminal fails.