Hello Readers, In this article we're going to learn what is Error Control and error control classification.
In the process of data transmission, due to the influence of noise on the channel, the signal waveform may be distorted when it is transmitted to the receiver, resulting in information errors. In order to meet the expected requirements of these errors, error control is required. The principle of error control is that after K bits of information are transmitted, there are R bits of redundant bits in the stock price. The information received by the receiver applies a unified algorithm, and the result is compared with the result of the sender. error. If the receiver knows that there is an error, but does not know what the error is, and then requests retransmission from the sender, this strategy is called error detection; if the receiver knows there is an error and knows what the error is, this strategy is called for error correction.
(2) Error control classification
There are two types of error control: bit errors and frame errors. A bit error is a bit error, 1 becomes 0, 0 becomes 1; there are three possible frame errors: loss, repetition, and out-of-order. If there is a related error, then we need to ask for a solution from the data link layer to the server provided by the network layer. The data link layer provides three basic functions to the network layer:
1. No confirmation and no connection service.
2. Confirm no connection service.
3. Confirmed link-oriented services.
The above is the knowledge explanation of "Error Control" brought by Shenzhen HDV photoelectric Technology Co., Ltd. The communication products produced by the company cover: Module categories: optical fiber modules, Ethernet modules, optical fiber transceiver modules, optical fiber access modules, SSFP optical modules, and SFP optical fibers, etc.
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