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

A technology of bus bit width and optical transport network, which is applied in the field of encoding and decoding, can solve the problems of OTN system bus bit width mismatch, etc., and achieve the effect of simple and effective implementation method and strong operability

Inactive Publication Date: 2010-07-28
FENGHUO COMM SCI & TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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

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Embodiment Construction

[0039] The present invention provides a method and circuit for implementing bus bit width conversion in an optical transmission network using SFEC, which is used to realize the 64-bit input bus bit width of an OTN frame to the SFEC outer code RS (1023, 1007) coding process. The conversion processing of 80-bit bus width and the conversion processing of 80-bit bus width to the 64-bit bus width required by inner code BCH (2040, 1952) encoding after SFEC outer code RS (1023, 1007) encoding, to Adapt to SFEC outer code RS (1023, 1007) encoding processing and SFEC inner code BCH (2040, 1952) encoding processing.

[0040] In order to better understand the present invention, the coding principles of SFEC outer code RS (1023, 1007) and inner code BCH (2040, 1952) are first introduced below.

[0041] The OTN frame structure specified in the ITU_T G.709 recommendation is as follows figure 1 As shown, the frame structure is a block byte structure with 4 rows and 4080 columns, in which th...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L12/56H04Q11/00
Inventor 朱齐雄
Owner FENGHUO COMM SCI & TECH CO LTD
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