Optical Error Correction Control for Power-Aware Iterative Decoding
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Solution Overview
Problem
Conventional error correction methods in coherent optical communication systems face challenges in optimizing power consumption while maintaining transmission characteristics, as they either fail to ensure desired error rates or require additional structures to control decoding frequency, leading to inefficient power usage.
Innovation Solution
An error correction device with a first correction unit that performs repetitive decoding in full and save operation states, controlled by an error information estimation unit and a control unit, which transitions between these states based on input and output error rates and operation time to optimize power consumption and error correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction decoding is performed by repetitive operation to increase error correction capability, then error correction capability is improved, but power consumption becomes greater
Solution Approach 1:
The patent applies dynamics by making the number of repetitive decoding operations adjustable rather than fixed. The control unit dynamically changes the number of iterations based on real-time error rate feedback, allowing the system to adapt between full operation mode (higher error correction capability) and save operation mode (lower power consumption) according to actual transmission conditions.
Solution Approach 2:
The patent changes the parameter of repetitive operation count based on error rate conditions. When error rates are low, the system reduces the number of repetitive decoding operations to save power. When error rates exceed correction capability, the system increases operations to ensure reliable correction, thus optimizing the balance between power consumption and error correction performance.
2Reliability
If the number of repetitive operations is increased to ensure desired error rate, then error correction reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements feedback control by monitoring error rates and using this information to adjust the number of repetitive decoding operations. The control unit receives error rate information and dynamically modifies the operation mode accordingly, ensuring that the desired error rate is maintained while minimizing unnecessary power consumption during periods of good transmission quality.
3Reliability
If error correction decoding is continuously performed to maintain transmission quality, then transmission characteristic is improved, but power consumption becomes excessive
Solution Approach 1:
The patent applies periodic action by implementing two distinct operation modes (full operation and save operation) that are periodically switched based on error rate conditions. Instead of continuous full-power decoding, the system alternates between high-performance and low-power modes, maintaining transmission quality when needed while reducing power consumption during normal operating conditions.
Data Source
AI summary
An error correction device includes a first correction unit which performs error correction decoding of data by a repetitive operation, having a full operation state in which the error correction decoding is repeated until convergence is obtained and a save operation state in which the number of times of the repetitive operation is restricted to a predetermined number. An error information estimation unit estimates an input error rate or an output error rate of the first correction unit using a decoding result of the first correction unit, and a control unit which controls transition between the full operation state and the save operation state based on at least one piece of information of the input error rate, the output error rate, and an operation time of the first correction unit. It is thus possible to provide an error correction device that can improve a transmission characteristic while suppressing power consumption.