Data transmission method, device and system

摘要

A data transmission method, device and system to improve reliability of a data link. When the sender side detects erroneous data, the erroneous data is discarded and a data retransmission request is sent to the sender side to ensure correctness of received data and improve reliability of the data link; and, when the sender side detects the erroneous data and a bit error rate is greater than a preset bit error rate threshold, the data link gets into auto recovery, and data transmission is resumed after the recovery succeeds, thereby avoiding an excessively high bit error rate, preventing an excessively high probability of omitted checks (the higher the bit error rate is, the higher probability of omitted checks is), and further improving reliability of the data link.

主权项

1. A data transmission method, wherein the method is used to exchange data with a sender side, and the method comprises:
receiving data sent by the sender side; checking the received data to determine whether erroneous data is detected; determining the erroneous data is detected; discarding the erroneous data and subsequently received non-retransmitted data; sending a data retransmission request to the sender side; counting a bit error rate of retransmitted data from the sender side; determining the bit error rate is not less than a preset bit error rate threshold; and collaborating with the sender side to perform link auto-recovery by transmitting a test code stream based on different compensation parameter combinations, wherein the compensation parameter combinations comprise a receiver-side compensation parameter and a sender-side accentuation parameter, wherein the link auto-recovery success is determined according to existence of a compensation parameter combination in which a bit error rate of transmitting the test code stream is less than the preset bit error rate threshold, and wherein the link auto-recovery failure is determined according to no existence of the compensation parameter combination in which the bit error rate of transmitting the test code stream is less than the preset bit error rate threshold.