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Method and device for synchronizing forward error correction coding and decoding modes

A forward error correction coding and forward error correction technology, which is applied in the field of synchronization methods and devices for forward error correction coding and decoding modes, can solve problems such as different coding and decoding modes and business interruption, and achieve the goal of reducing the probability of business interruption Effect

Inactive Publication Date: 2009-12-02
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is proposed in view of the problem that the receiving end and the transmitting end may have different encoding and decoding modes in the related art, which may lead to service interruption. Therefore, the main purpose of the present invention is to provide an improved forward error correction (FEC) encoding and decoding mode A synchronization scheme to solve at least one of the above problems

Method used

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  • Method and device for synchronizing forward error correction coding and decoding modes
  • Method and device for synchronizing forward error correction coding and decoding modes
  • Method and device for synchronizing forward error correction coding and decoding modes

Examples

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example 1

[0051] In this example, pure software is used to process FEC codec synchronization. image 3 It is a flow chart of the pure software synchronization method processing of the OTN overhead reserved byte mode receiving end FEC coding mode according to the embodiment of the present invention, as image 3 As shown, the process includes the following steps:

[0052] Step S301, the FEC uncorrectable error exceeds the limit? If the judgment result is yes, execute step S302. It should be noted that there are two situations in which an uncorrectable error exceeds the limit of FEC, the first is caused by a different FEC codec mode, and the second is caused by an error during transmission. Steps S302 to S305 are used to determine whether the FEC uncorrectable error exceeds the limit due to the replacement of the FEC code. Steps S306 and S307 are when the FEC uncorrectable error exceeds the limit and is not caused by the difference in the codec mode. The next processing.

[0053] Step ...

example 2

[0062] Figure 4 It is a structural block diagram of a device that combines software and hardware in an OTN overhead reserved byte mode receiving end FEC coding mode and a synchronization method according to an embodiment of the present invention, as shown in Figure 4 As shown, the reception processing module 40 is an existing OTN reception processing unit, the extraction module 50 is an FEC encoding type ID extraction unit, and the control module 60 is a control unit. After the optical path OTN signal is photoelectrically converted, two parallel outputs are output, and one input receives The processing module 40 has one input to the extraction module 50. After the signal input to the extraction module 50 is descrambled, FEC error correction is not performed, but under the control of the control module 60, the FEC encoding type is directly extracted from the overhead reserved bytes according to the row and column information. ID, the control module 60 controls the receiving p...

example 3

[0064] Figure 5 It is a structural block diagram of a device for implementing FEC encoding mode synchronization using a pure ASIC logic chip according to an embodiment of the present invention, such as Figure 5 As shown, the first extraction module 100 is a frame extraction module, the processing module 200 is a frame processing module, and the first extraction module 100 includes three processing units: a first processing unit 70, a second processing unit 80, and a third processing unit 90, Wherein, the first processing unit 70 implements descrambling processing, the second processing unit 80 extracts the FEC encoding mode ID from the reserved bytes of the current OTN frame, and the second processing unit 80 controls the third processing unit 90 according to the extracted FEC encoding mode ID Decode and correct the next OTN frame to achieve synchronization with the FEC coding mode at the sending end.

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Abstract

The invention discloses a method and a device for synchronizing forward error correction coding and decoding modes. The method comprises the following steps that: a receiving end receives indicating information sent by a sending end and acquires a forward error correction coding mode of the sending end according to the indicating information, wherein the indicating information carries the forward error correction coding mode of the sending end; and the receiving end determines a decoding mode corresponding to the forward error correction coding mode of the sending end. The method and device synchronizing the forward error correction coding and decoding modes realize the automatic synchronization of the forward error correction decoding mode of the receiving end and the forward error correction coding mode of the sending end and reduce the probability of service interrupt.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for synchronizing a forward error correction codec mode. Background technique [0002] Optical Transport Network (OTN for short) is a transmission network based on wavelength division multiplexing technology and organized at the optical layer. - A new generation of "digital transmission system" and "optical transmission system" regulated by the recommendations of the International Telecommunications Union-Telecommunications standardization sector (ITU-T for short). It has the characteristics of multi-wavelength transmission (single-wavelength transmission is a special case) and large-grained scheduling. It combines the advantages of Synchronous Digital Hierarchy (referred to as SDH and Wavelength Division Multiplexing (referred to as WDM)) and is Next-generation backbone transmission network. [0003] At present, optical fiber communication technology is de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B10/08H04J3/06
CPCH04L1/0075H03M13/00H04L1/0009H03M13/63
Inventor 徐坤
Owner ZTE CORP
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