Method and circuit applying SFEC to realize bit width transformation of bus in OTN (optical transport network)

Abstract

The invention discloses a method and a circuit applying SFEC to realize bit width transformation of a bus in an OTN (optical transport network). The steps of the method are as follows: S10, OTN-frame data input by a 64-bit system bus is encoded according to the encoding rule of an outer code RS (1,023 and 1,007) and is stored in a buffer memory M which is composed of 8 RAMs, and the size of each RAM is 1,530*10; S20, 10 RS (1,023 and 1,007) encoded data is respectively read at a time from the 8 RAMs of the buffer memory M, encoded according to the encoding rule of an inner code BCH (2,040 and1,952) and then stored in a buffer memory N which is also composed of 8 RAMs, and the size of each RAM is 244*64; S30, 64 BCH (2,040 and 1,952) encoded data is sequentially output from the 8 RAMs of the buffer memory N to the 64-bit system bus. By controlling the read-write operation of the buffer memories, the invention realizes the bus transformation from 64-bit width to 80-bit width required by the outer code and the bus transformation from 80-bit width to 64-bit width. The realization of the method is simple and effective, and the operability is strong.

Description

technical field [0001] The invention relates to the encoding and decoding technology of the OTN optical transmission network, in particular to a method and a circuit for realizing bus bit width conversion in the optical transmission network using SFEC. Background technique [0002] With the advent of the Internet age, people's demand for information is increasing day by day. Because optical communication technology has huge bandwidth resources and relatively low manufacturing costs, OTN, as the foundation of the next generation broadband communication network and an important supporting platform for information transmission technology, will play a very important role in the future information society. role. [0003] As people's demand for information increases day by day, it greatly expands the demand space of the telecommunication network for the optical communication system and stimulates the rapid development of the optical communication system's own technology. A bette...

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is to solve the problem that the bus bit width does not match in the OTN system using SFEC coding rules

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