Multi-Channel FEC Interleaving for Burst Error Correction
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Solution Overview
Problem
High-speed data transmission in Ethernet networks faces signal loss and intersymbol interference, leading to increased bit errors, which current methods using decision feedback equalizers and interleavers struggle to effectively correct, especially with the growing bandwidth demands.
Innovation Solution
Implementing a method where a sending device uses multiple forward error correction (FEC) units to encode and interleave data streams, allowing the receiving device to de-interleave and decode them separately, reducing the burden on individual FEC units and minimizing delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a decision feedback equalizer is used to correct signal distortion, then signal quality can be improved, but bit error rate increases due to error bursts
Solution Approach 1:
The patent segments the data stream into multiple parallel channels, each processed by a separate FEC unit. This divides the error correction burden and prevents error bursts from overwhelming a single correction mechanism, thereby improving reliability while maintaining signal quality.
Solution Approach 2:
The patent introduces an interleaver as an intermediary component between the FEC encoder and the transmission channel. This interleaver redistributes data units across multiple channels, acting as a mediator that prevents concentrated errors from affecting a single FEC unit and improves overall error correction effectiveness.
2Reliability
If an interleaver writes by row and reads by column to distribute errors, then error correction pressure is reduced, but transmission delay increases
Solution Approach 1:
Instead of using a single large interleaver with row-by-row writing that causes delay, the patent segments the interleaving function into multiple parallel channels. Each channel processes data units independently, eliminating the need for buffer storage and reducing transmission delay while maintaining error distribution benefits.
Solution Approach 2:
The patent performs preliminary distribution of data units to different channels at the source before transmission. This preliminary action eliminates the need for complex post-reception interleaving operations, thereby reducing delay while achieving the same error distribution effect.
3Reliability
If multiple FEC units are used to process data streams, then error correction capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the data stream into multiple channels, each processed by a dedicated FEC unit. This segmentation allows each FEC unit to operate independently on simplified data, improving error correction capability while keeping individual unit complexity low through functional decomposition.
Solution Approach 2:
The patent applies FEC encoding partially to specific data units that require error protection, rather than encoding the entire data stream uniformly. This selective application improves error correction capability for critical data while reducing overall device complexity by avoiding redundant encoding operations.
Data Source
AI summary
An embodiment of the present disclosure contemplates a data sending and receiving method and apparatus. A first FEC unit of a sending device sends, by using a first channel, a first data stream on which first FEC encoding has been performed; a second FEC unit of the sending device sends, by using a second channel, a second data stream on which second FEC encoding has been performed; and the sending device performs interleaving on the first data stream and the second data stream, to obtain an output data stream, and sends the output data stream to a receiving device and error correction capability of a receiving device could be improved. In addition, in the present disclosure, an operation of writing by row and reading by column does not need to be performed. Therefore, no delay is generated.