Forward Error Correction for High-Bandwidth Data Lanes
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Solution Overview
Problem
Existing data communication systems are inadequate for handling high-bandwidth applications such as social media platforms that process large amounts of multimedia data, requiring improved systems for efficient data transfer and processing.
Innovation Solution
A communication apparatus that synchronizes and encodes 25 G, 40 G, 50 G, or 100 G signals using pseudo random bit sequence checkers, skew compensators, de-skew FIFO modules, and forward error correction, enabling high-speed data transmission and error correction across multiple lanes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data communication systems use existing transmission methods, then system simplicity is maintained, but they become inadequate for high-bandwidth applications requiring efficient data transfer
Solution Approach 1:
The system divides data transmission into multiple parallel lanes (e.g., four lanes for 100Gbps) to increase overall bandwidth. Each lane operates independently at lower speeds, allowing the system to achieve high aggregate throughput while managing complexity through modular parallel processing
Solution Approach 2:
The system performs preliminary actions including skew compensation to align data from multiple lanes before processing, and uses de-skew FIFO modules to buffer and synchronize data. These preliminary operations ensure data integrity and timing alignment before the data reaches the FEC encoder, enabling efficient high-bandwidth transmission
2Speed
If high-speed data transmission is implemented, then data transfer capability is improved, but error rates increase due to signal degradation and interference
Solution Approach 1:
The system applies forward error correction (FEC) encoding before data transmission, adding redundant parity bits that allow the receiver to detect and correct errors without requiring retransmission. This preliminary error correction preparation enables high-speed transmission while maintaining reliability by preventing errors from propagating through the system
Solution Approach 2:
The system uses pseudo random bit sequence (PRBS) checkers to continuously monitor data integrity and detect errors during transmission. This feedback mechanism allows the system to identify transmission quality issues and adjust operation accordingly, ensuring reliable data transfer even at high speeds
3Productivity
If multiple lanes are used for high-bandwidth transmission, then data transfer capacity is improved, but timing skew between lanes causes data misalignment
Solution Approach 1:
The system performs skew compensation as a preliminary action by measuring timing differences between lanes and adjusting data capture timing accordingly. The de-skew FIFO modules buffer data from each lane with different depths to compensate for skew variations, ensuring all lanes are synchronized before data is processed together
Solution Approach 2:
The system dynamically adjusts timing parameters and buffer depths of de-skew FIFO modules based on measured skew conditions. By changing these parameters in response to actual timing deviations, the system maintains precise synchronization across multiple lanes despite variations in signal propagation paths
Data Source
AI summary
Embodiments of the present invention include an apparatus that receives date from multiple lanes, which are then aligned and synchronized for transcoding and encoding.