Optical Transmission Mode Selection Across Parameter Combinations
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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 modes based on priority order of parameter combinations, using signal quality detection and determination, and candidate information exchange between devices via pilot tone signals or signal frames, with a control device calculating transmission quality and generating candidate lists.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transmission mode selection is limited to modulation scheme 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 the modulation scheme, then selecting from candidate transmission modes that combine multiple parameters (modulation scheme, baud rate, error correction code type, number of carriers). This segmentation allows the system to maintain simple initial selection while achieving comprehensive optimization.
Solution Approach 2:
The patent performs preliminary action by pre-generating candidate transmission mode information that combines multiple parameters before actual transmission mode selection. The control device calculates transmission quality for each candidate mode in advance, so when selection is needed, the system can quickly choose from pre-evaluated options rather than evaluating all possibilities in real-time.
2Reliability
If multiple parameters are considered for transmission mode selection, then transmission performance optimization is improved, but the selection process complexity increases
Solution Approach 1:
The patent divides the complex multi-parameter selection into manageable segments: modulation scheme selection first, then candidate transmission mode selection from pre-calculated options. This reduces the computational burden at any single decision point while still considering all parameters.
Solution Approach 2:
The control device performs preliminary calculation of transmission quality for multiple candidate modes before the actual selection occurs. This advance preparation stores evaluation results that can be quickly referenced during selection, avoiding the need for complex real-time calculations when multiple parameters must be considered.
3Measurement precision
If signal quality detection and determination are performed, then transmission mode selection accuracy is improved, but processing time increases
Solution Approach 1:
The patent performs signal quality detection and determination in advance during the candidate transmission mode generation phase. By evaluating signal quality metrics before final selection, the system prepares accurate selection criteria that can be quickly applied without time-consuming measurements during the actual selection moment.
Solution Approach 2:
The signal-quality determination unit uses detected signal quality information to automatically determine whether the signal quality is permissible, enabling the system to self-evaluate and make selections based on pre-established criteria without requiring external intervention or repeated measurements.
4Reliability
If transmission mode information is exchanged between devices, then compatibility and optimization are improved, but communication overhead increases
Solution Approach 1:
The patent extracts only the essential transmission mode information needed for selection from the full set of possible parameters. The transmission device sends transmission-side transmission mode candidate information and the reception device sends reception-side transmission mode candidate information, which are then used to determine the final mode without transmitting all possible configuration details.
Solution Approach 2:
The candidate transmission mode information serves multiple functions: it represents both the transmission device's capabilities and the reception device's capabilities, enables compatibility checking, and provides the basis for optimization selection. This multi-functional data structure reduces the need for separate communication exchanges for each purpose.
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.