Line Decoding Error Indication via Sync Characters in 10G EPON
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Solution Overview
Problem
In the 10G EPON system, there is no effective method to indicate an uncorrectable data block to the line decoding module after a failure of FEC decoding, which hinders error detection and correction.
Innovation Solution
A method and device that set synchronization characters of data blocks with decoding failure to specific characters, allowing the line decoding module to detect and correct errors by performing line decoding on these blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If FEC coding technique is employed to improve anti-jamming capability and power budget, then system reliability is improved, but there is no method to indicate uncorrectable data blocks to the line decoding module
Solution Approach 1:
The patent introduces a control character as an intermediary between the FEC decoding module and the line decoding module. This control character carries error indication information, enabling the line decoding module to identify uncorrectable data blocks without requiring complex direct communication mechanisms between modules.
Solution Approach 2:
The patent implements a feedback mechanism where the FEC decoding module sends error status information back to the line decoding module through control characters. This allows the receiving end to detect and report uncorrectable data blocks, creating a closed-loop error management system that improves overall reliability.
2Stability of the object's composition
If line coding with scrambler is used to ensure sufficient transitions for clock recovery, then synchronization is improved, but error indication capability is lost
Solution Approach 1:
The patent applies local quality by introducing special control characters with specific patterns (such as 0x1E or 0x7F) that differ from normal scrambled data. These control characters maintain the synchronization properties required by the line coding scheme while simultaneously providing distinguishable error indication signals that the line decoding module can detect despite the scrambling operation.
Data Source
AI summary
A method and device for indicating an uncorrectable data block. The method includes: if a forward error correction decoding fails, setting synchronization character of at least one of the corresponding data blocks to a first character; and performing line decoding on the data block with the set first character, and outputting decoded data. With the invention, indicating the uncorrectable data block Simple and effective to a line decoding module can be implemented in case of a failure of FEC decoding.