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Editor to share with you what are the methods of using coding to control errors in data communication. I hope you will get something after reading this article. Let's discuss it together.

In data communication, there are basically two methods of error control using coding, which are "automatic resend request ARQ" and "forward error correction FEC". Automatic repeat request (ARQ) method emphasizes error detection ability, does not require error correction ability, two-way channel use; forward error correction FEC method is good real-time, simplex communication.

In data communication, there are basically two methods of error control using coding, which are "automatic resend request ARQ" and "forward error correction FEC".

Error control is a technology that uses coding methods to control errors in transmission in order to improve the correctness and effectiveness of transmission. Error control includes error detection, forward error correction (FEC) and automatic request retransmission; (ARQ).

According to the different error properties, error control is divided into random error control and burst error control. Random error means that the channel error is evenly distributed over different time intervals, while burst error means that the channel error is concentrated in a very short period of time. Sometimes several error control methods are mixed, and it is required to have a certain error control ability for both random error and burst error.

A method for ensuring the integrity and accuracy of the received data. Because the actual telephone line is always imperfect. Data may become disordered or lost during transmission. In order to catch these errors, the sending modem performs a mathematical operation on the data to be sent and sends the result together with the data, and the modem that receives the data performs the same operation on the data it receives. The two results are compared. If the data is destroyed during transmission, the two results are inconsistent and the modem that receives the data requests the sender to resend the data.

Errors in the communication process can be roughly divided into two categories: one is random errors caused by thermal noise, and the other is sudden errors caused by conflict noise. Sudden errors affect the local, while random errors affect the overall situation.

Error control mode:

1. Forward error correction. Good real-time performance and simplex communication.

2. Automatically resend the request (ARQ). Emphasize error detection ability, do not require error correction ability, two-way channel use.

3. Hybrid error correction. The combination of the above two methods, but the transmission equipment is relatively complex.

After reading this article, I believe you have a certain understanding of "what are the methods of using coding for error control in data communication". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for your reading!

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