Adaptive FEC Switching in Terminal Control for Optical Transmission
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Solution Overview
Problem
Existing techniques for managing error correction in optical communication systems are inefficient, particularly when transmission quality changes, as they require complex synchronization and increased circuit size, leading to decreased transmission efficiency and potential errors.
Innovation Solution
A terminal apparatus equipped with coding and decoding means that can select from various error correction codings, allowing for dynamic adjustment of error correction methods based on real-time feedback to maintain optimal transmission quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a FEC method having a high error correction ability is fixedly used to maintain transmission quality, then transmission reliability is improved, but transmission efficiency decreases and processing delay and power consumption increase
Solution Approach 1:
The patent implements dynamic switching between multiple FEC methods (first FEC method with high error correction ability, second FEC method with low error correction ability, and third FEC method with intermediate ability) based on real-time transmission quality monitoring. The terminal device selects different FEC methods according to current line conditions, transitioning from fixed high-error-correction FEC to adaptive FEC selection, thereby resolving the contradiction between maintaining high transmission quality and preserving transmission efficiency.
Solution Approach 2:
The patent changes the error correction parameter (FEC method type) based on transmission quality conditions. By monitoring transmission quality and adjusting the FEC method parameter accordingly (switching between first, second, and third FEC methods), the system optimizes the balance between error correction ability and transmission efficiency, avoiding the fixed parameter approach that causes continuous high overhead.
2Reliability
If a FEC method having a high error correction ability is fixedly used to maintain transmission quality, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic switching between multiple FEC methods (first FEC method with high error correction ability, second FEC method with low error correction ability, and third FEC method with intermediate ability) based on real-time transmission quality monitoring. The terminal device selects different FEC methods according to current line conditions, transitioning from fixed high-error-correction FEC to adaptive FEC selection, thereby resolving the contradiction between maintaining high transmission quality and preserving transmission efficiency.
Solution Approach 2:
The patent changes the error correction parameter (FEC method type) based on transmission quality conditions. By monitoring transmission quality and adjusting the FEC method parameter accordingly (switching between first, second, and third FEC methods), the system optimizes the balance between error correction ability and transmission efficiency, avoiding the fixed parameter approach that causes continuous high overhead.
3Productivity
If error correction methods are switched based on transmission quality monitoring, then transmission efficiency is improved, but control complexity increases due to synchronization requirements
Solution Approach 1:
The patent employs feedback mechanisms where the terminal device monitors transmission quality and sends notifications to the opposite terminal about the monitored quality and selected FEC method. The opposite terminal uses this feedback information to switch its FEC method accordingly. This feedback-based coordination reduces control complexity compared to complex synchronization protocols while maintaining transmission efficiency through adaptive FEC selection.
Data Source
AI summary
A terminal apparatus (1) is provided with a coding unit (7), a decoding unit (2), and a control unit (5) for controlling the coding unit and the decoding unit individually. Under control of the control unit, the coding unit codes a payload, a first number of error corrections (3), and identification information (6) that are to be transmitted, on the basis of a method indicated by the already-transmitted identification information to thereby generate first coded data. The decoding unit decodes newly-received second coded data on the basis of a method indicated by the identification information included in a decoding result of the already-received second coded data.