Data transmission methods, data transmission device, and data transmission apparatuses

A data transmission method, comprising:

• sequentially sending N data packets to a communication opposite-end device, each data packet including a piece of target data, and N being a positive integer greater than 1;
• receiving a first retransmission instruction from the communication opposite-end device, the first retransmission instruction including K1 pieces of first indication information indicating that data packets are transmitted incorrectly, K1 being greater than or equal to 0, and less than or equal to N (0≤K1≤N), and K1 being an integer;
• and
• after determining that the K1 pieces of first indication information in the first retransmission instruction are M pieces of first indication information, sequentially sending M retransmission data packets to the communication opposite-end device according to a sequence of the M pieces of first indication information in the first retransmission instruction, each retransmission data packet including a piece of target data to be retransmitted in a data packet corresponding to a piece of first indication information, and M being a positive integer less than or equal to N.

A data transmission device, comprising:

• a receiving unit configured to receive N data packets sent by a communication opposite-end device, each data packet including a piece of target data, and N being a positive integer greater than 1;
• a sending unit;
• a storage unit;
• and
• a processing unit coupled to the receiving unit, the sending unit and the storage unit, wherein
• the processing unit is configured to:
• sequentially determine whether a transmission error occurs in each data packet according to a receiving sequence of the N data packets from a first data packet to an Nth data packet;
• if it is determined that a data packet is transmitted incorrectly, store a piece of first indication information indicating that the data packet is transmitted incorrectly in a first queue;
• and generate a first retransmission instruction after determining that the reception of the N data packets ends, the first retransmission instruction including information in the first queue;
• the sending unit is configured to send the first retransmission instruction to the communication opposite-end device.