Automatic retransmission request method with self-healing function

Abstract

The invention discloses an automatic retransmission request method with a self-healing function, and mainly solves the problems of large resource waste, no necessity of retransmission, high system complexity and low stability. The method comprises the following process: a sending terminal sends data frames, and numbers the data frames by 1 bit; a receiving terminal receives information, verifies the information, compares serial numbers thereof, and implements the feedback according to comparing results; and the sending terminal adjusts data contents and serial numbers to be sent at the next time according to feedback information. The method reduces the equipment resource waste, and avoids unnecessary retransmission; and in the method, if a plurality of errors occur continuously, the old data is not sent any more by the sending terminal, but the new data is sent, and the serial numbers are added by 1, so that the automatic recovery is achieved, the system blockage is not caused, the system stability is improved, and the realization complexity is reduced.

Description

technical field [0001] The invention belongs to the technical field of communication, relates to a novel method for automatically requesting retransmission, and can be applied to a data communication network. Background technique [0002] With the increasing development and wide application of communication technology, people have higher and higher requirements for data reliability. Therefore, reliable, convenient, flexible and efficient transmission control procedures are very important in engineering design and application. The reliability of traditional data transmission is not high. It only has error detection function but no error retransmission function. When the data bit is wrong, the buffer of the receiver cannot meet the normal working requirements or other abnormal conditions, the receiver will simply discard it. frame without any feedback to the sender; in the case of a high bit error rate, the reliability of the transmission will be greatly reduced. Therefore, ...

AI Technical Summary

Problems solved by technology

[0008] 1) In the traditional automatic retransmission mechanism, the sender needs to start a timer every time it sends a frame. In the continuous ARQ protocol, the sender needs to maintain multiple timers, which increases the complexity of the implementation and causes a certain amount of resources. waste

[0009] 2) In the traditional automatic retransmission protocol, if a frame is wrong, it must continue to retransmit the frame until the frame is correctly received by the receiving end, and the sending end can continue to send subsequent new data after receiving the correct feedback of the frame. In actual use In the process, this will cause outdated useless information to continuously occupy the channel, so that subsequent real-time new frames cannot be sent, which greatly reduces the utilization rate of the channel.

[0010] 3) The traditional automatic request retransmission mechanism requires complex link establishment, maintenance and link tearing processes

Once the serial number is abnormal, it is necessary to re-synchronize the sending and receiving parties, otherwise, the system may be stuck or even crashed due to the out-of-synchronization of the sending and receiving parties.

However, the resynchronization process increases the implementation complexity of both the sender and receiver

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