Optical Receiving Device Local Selection Path Switching
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Solution Overview
Problem
Existing wavelength division multiplexing transmission systems with redundant configurations are complex and costly due to the need for additional components like redundant transponders and optical switches, and require complicated processing for path switching.
Innovation Solution
An optical transmission system that includes an optical transmitting device with operating and redundant channel units and an optical receiving device with a local selection function unit, channel setting control unit, and receiving unit, which uses digital coherent technology to select and receive optical signals by interference of local light, allowing for path switching without the need for redundant transponders or optical switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant transponder or optical switch is prepared for path switching, then system reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the redundant path transmission function with the existing operating path transponder, eliminating the need for separate redundant transponders. The single transponder can dynamically switch between operating and redundant path transmissions based on system conditions, thereby reducing device complexity while maintaining reliability.
Solution Approach 2:
The patent implements dynamic path switching capability where the transponder can adaptively change its transmission path from operating to redundant based on detected abnormalities. This dynamic behavior allows the system to maintain high reliability without requiring static redundant components for every possible failure scenario.
2Reliability
If redundant components are added for path switching, then system reliability is improved, but cost increases
Solution Approach 1:
The patent makes the transponder multi-functional by enabling it to perform both operating path transmission and redundant path transmission. The same transponder hardware can serve multiple purposes depending on configuration and system needs, eliminating the need for dedicated redundant hardware and reducing overall system cost.
Solution Approach 2:
Instead of creating physical copies of redundant transponder hardware, the patent uses virtual copying through software-controlled path switching. The same physical transponder can be logically configured to transmit on different paths, providing redundancy through configuration rather than physical duplication.
3Reliability
If path switching is implemented with redundant transponders or optical switches, then system reliability is improved, but processing complexity increases
Solution Approach 1:
The patent extracts the switching control function from separate hardware components (optical switches) and integrates it into the transponder's control logic. This consolidation simplifies the overall system operation by reducing the number of independent switching operations required and centralizing control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration simplifies the system and reduces costs by enabling path switching only at the receiving end, eliminating the need for redundant transponders and optical switches, and allows for continuous operation by switching to the redundant path when an abnormal condition occurs in the operating path.
Implementation Method 1
a local selection function unit that has a function of selecting a wavelength of the first optical signal or the second optical signal by interference of local light having the same wavelength as the first optical signal or the second optical signal
Data Source
AI summary
An optical transmission system includes an optical transmitting device (8) and an optical receiving device (9). The optical transmitting device (8) includes an operating channel transmitting unit (81) that transmits a first optical signal to an operating channel, and a redundant channel transmitting unit (82) that transmits a second optical signal having the same information as the first optical signal to a redundant channel. The optical receiving device (9) includes a local selection function unit (91) that has a function of selecting a wavelength of the first optical signal or the second optical signal transmitted from the optical transmitting device (8), a channel setting control unit (92) that sets a wavelength to be selected by the local selection function unit (91), and a receiving unit (93) that receives the first optical signal or the second optical signal having the wavelength selected by the local selection function unit (91).