Time-division-multiplexing forward error correction (FEC) coding method and device

Abstract

The invention relates to a time-division-multiplexing forward error correction (FEC) coding method and a time-division-multiplexing forward error correction (FEC) coding device. The time-division-multiplexing forward error correction (FEC) coding method comprises the following steps that: at least one path of oracle database unloader (ODU) time division multiplexing service signals is received; demultiplexing is not performed on the oracle database unloader (ODU) time division multiplexing service signals, and four-byte parallel coding processing is performed each code block of each service according to an input multiplexing relation so as to obtain OTU time division multiplexing signals; and the OTU time division multiplexing signals are outputted. With the time-division-multiplexing forward error correction (FEC) coding method and device of the invention adopted, coding efficiency, system transmission efficiency and network data transmission processing capacity can be improved; as for multi-service multiplexing data processing, processing such as data collection before coding and output smoothing after the coding is not required, and coding operation can be performed directly according to multiplexing characteristics of input services; each input service multiplexes the same set of coding circuit, and therefore, compared with one mode in which each service correspondingly requires one set of encoder, resource consumption of the coding circuit can be greatly reduced, and power consumption of the circuit can be decreased.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a time-division multiplexing FEC encoding method and device in the field of optical communication. Background technique [0002] In the field of optical communication, driven by the high-speed transmission of multiple services, the requirements for the speed and transmission reliability of the optical transport network are getting higher and higher. In optical communication, forward error correction (FEC, Forword Error Correction) is usually used to reduce the bit errors generated by signal transmission through the channel, so as to improve the quality of signal transmission and reduce the power requirements for optical equipment. Among them, RS codes (Reed-solomon codes, Reed-Solomon codes) are one of the frequently used coding methods. RS codes are very effective in correcting random symbol errors and random burst errors, and have been widely used in optical comm...

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Problems solved by technology

[0003] In the prior art, when RS coding is applied, the serial coding method is usually adopted. In the timing, one code word is serially processed one code word after another, and one code word is 8 bits, that is, only 8 bits can be processed in one clock cycle, such as figure 1 As shown, this method has low coding efficiency, and the data throughput rate is not high, and it cannot meet the requirements of high-speed transmission for data processing, which is not conducive to the improvement of the transmission rate of the entire system.

[0004] At present, there are also technical solutions that use a dual-codeword parallel encoding method. In this method, two codewords can be processed in parallel in each clock cycle. Although the encoding efficiency and system data throughput have been improved, it still needs to be implemented for high-speed business transmission. Further improve processing power

Moreover, this method uses a large resource consumption to obtain the improvement of coding efficiency and system data throughput rate. The biggest disadvantage is that, for the simultaneous processing of multiple services, multiple sets of encoders are required in parallel, that is, one set for each service encoder, thereby increasing resource consumption

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