Optical Transmission Mode Selection for Multi-Parameter Link Optimization
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Solution Overview
Problem
Existing techniques fail to optimally select transmission modes considering combinations of parameters such as baud rates, error correction codes, and number of carriers in optical transmission systems.
Innovation Solution
An optical transmission system and method that selects transmission mode information in descending order of priority based on combinations of parameters like modulation schemes, baud rates, and error correction codes, using signal-quality detection and candidate information exchange between devices, and includes a control device for managing transmission quality and network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transmission mode selection is limited to modulation schemes only, then the selection process is simple, but transmission performance cannot be optimized across multiple parameters
Solution Approach 1:
The patent segments the transmission mode selection into two distinct phases: first selecting modulation schemes using prior art methods, then separately selecting optimal combinations of other parameters (baud rates, error correction codes, number of carriers) based on the selected modulation scheme. This segmentation allows simple modulation selection while enabling comprehensive performance optimization through subsequent parameter combination selection.
Solution Approach 2:
The patent performs preliminary selection of modulation schemes before selecting other transmission parameters. By first determining the modulation scheme and then selecting optimal combinations of baud rates, error correction codes, and carrier numbers based on that scheme, the system prepares transmission mode information in advance, enabling optimized transmission without real-time complexity.
2Reliability
If multiple transmission parameters are considered for optimization, then transmission performance improves, but the complexity of mode selection increases
Solution Approach 1:
The patent divides the complex multi-parameter selection problem into manageable segments: modulation scheme selection followed by separate selection of baud rates, error correction codes, and carrier numbers. Each segment can be optimized independently based on the previous selection, reducing the overall complexity while achieving comprehensive performance optimization.
Solution Approach 2:
The system performs preliminary selection of modulation schemes and uses this as a basis for subsequent parameter selection. By establishing the modulation scheme first and then selecting other parameters based on it, the system reduces the search space and complexity of the overall selection process while maintaining comprehensive optimization capability.
3Productivity
If single transmission mode is selected without considering signal quality feedback, then the selection process is fast, but adaptation to varying channel conditions is poor
Solution Approach 1:
The patent performs preliminary selection of transmission mode information including modulation schemes and other parameters in advance, creating a set of candidate modes. This preliminary selection can be done quickly based on pre-established criteria, enabling fast initial mode determination while maintaining the capability for subsequent adaptation based on signal quality feedback.
Solution Approach 2:
The system selects transmission mode information in advance and uses this selection as feedback for subsequent transmissions. By establishing transmission mode information beforehand and applying it to signal transmission, the system enables both fast initial selection and adaptation to channel conditions through the feedback loop inherent in communication systems.
Data Source
AI summary
An optical transmission system including an optical transmission device and an optical reception device that receives, via an optical transmission line, a signal transmitted from the optical transmission device, the optical transmission system including a transmission-mode selection unit that selects transmission mode information in descending order of priority out of transmission mode information, which is combinations of a plurality of parameters concerning transmission performance, the transmission mode information being a plurality of kinds of the transmission mode information common to the transmission performance of the optical transmission device and the optical reception device, a signal transmission unit that transmits, to the optical reception device, a signal modulated based on the selected transmission mode information, and a signal reception unit that receives the signal and modulates the received signal based on the transmission mode information selected by the transmission-mode selection unit.