Optical Transponder Signal Switching for Carrier Failure Continuity
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Solution Overview
Problem
In optical transmission systems, an abnormality in one carrier signal can disrupt the entire traffic of client transmission data, leading to complete interruption when using multiple carrier signals, as the system lacks the ability to continue traffic partially when a carrier signal is in a non-link-establishable state.
Innovation Solution
A signal transmission device with multiple optical receivers and a monitoring section that detects non-link-establishable carrier signals, allowing for data extraction at different rates and switching to maintain traffic using a link-establishable carrier signal, ensuring partial continuation of traffic even if one carrier signal fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple carrier signals are used to transmit client transmission data, then the data transmission capacity is improved, but the system reliability deteriorates because an abnormality in one carrier signal causes complete interruption of all client traffic
Solution Approach 1:
The patent segments the client transmission data into multiple independent groups, where each group can be transmitted through a separate carrier signal. When a carrier signal fails, only the data group associated with that carrier is affected, while other data groups continue transmission through their respective carriers. This segmentation prevents complete system failure and maintains partial service continuity.
Solution Approach 2:
The patent implements dynamic switching capability that allows the system to adaptively change transmission configurations based on carrier signal status. When a carrier signal becomes abnormal, the system dynamically reconfigures to continue transmitting affected data groups through alternative carrier signals, transforming the system from a static all-or-nothing configuration to a dynamic flexible configuration that maintains reliability.
2Reliability
If all client transmission data is transmitted through a single carrier signal, then the system reliability is maintained, but the data transmission capacity is limited
Solution Approach 1:
The patent divides client transmission data into multiple independent transmittable units (data groups), each capable of being transmitted through separate carrier signals. This segmentation enables parallel transmission across multiple carriers, significantly increasing overall data transmission capacity while maintaining the ability to isolate and manage individual carrier failures.
Solution Approach 2:
The patent creates a multi-functional transmission system where each carrier signal can independently handle different data groups, and any carrier signal can potentially transmit any data group through dynamic reconfiguration. This universality allows the system to flexibly allocate transmission resources, maximizing capacity utilization while maintaining reliability through redundancy.
3Productivity
If the data transmission rate is increased from 10 Gbps to 40 Gbps or 100 Gbps, then the productivity is improved, but transmission penalties such as chromatic dispersion and polarization mode dispersion become more marked
Solution Approach 1:
The patent segments high-rate data transmission into multiple parallel lower-rate carrier signals, each operating at manageable data rates that are less susceptible to transmission penalties. By dividing the total data stream across multiple carriers, the system achieves high aggregate throughput while each individual carrier operates at a rate that minimizes chromatic dispersion and polarization mode dispersion effects.
Solution Approach 2:
The patent transitions from single-dimensional high-speed transmission to multi-dimensional parallel transmission by utilizing multiple carrier signals with different wavelengths. This dimensional expansion allows the system to achieve high total bandwidth while each individual transmission dimension operates at lower speeds, reducing the impact of transmission penalties in each dimension.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A transponder (1) includes a multiplexing section (2), optical transmitters (3, 4), optical receivers (5, 6), an extracting section (7), and a warning monitor section (8), wherein the extracting section (7) includes a first signal extracting unit for extracting reception data (F1 - F10), a second signal extracting unit for extracting reception data, and a reception signal switching section. When carrier signals are in a link-establishable state, the reception signal switching section supplies reception electric signals (E1, E2) generated by the optical receivers (5, 6) to the first signal extracting unit and outputs the reception data. When a carrier signal is in a non-link-establishable state, the reception signal switching section supplies a reception electric signal (E1 or E2) generated by an optical receiver using a carrier signal in the link-establishable state to the second signal extracting unit and outputs the reception data extracted by the second signal extracting unit.