Transmission method, system and related device

The invention discloses a transmission method, a transmission system and a related device. The sending device can generate the authentication code A based on the sending time information and the original data. The sending device can send the data packet including the authentication code A to the receiving device in the first transmission system. The receiving device can generate the authentication code B based on the receiving time information and the data packet after receiving the data packet, and the receiving device can determine the receiving state of the data packet based on the authentication code B.