Optical Transceiver Automatic Power Adjustment via Bit Error Rate Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical transmission systems face challenges in automatically adjusting optical power levels to maintain communication integrity when errors occur, as they rely on manual intervention or inefficient methods to detect and correct bit error rates in multi-valued optical signals.
Innovation Solution
A communication system with optical transceivers that generate and adjust multi-valued pulse amplitude modulation signals using a fixed bit pattern, allowing for the detection of bit error rates and automatic adjustment of optical power levels through optical adjustment signals, enabling the system to recover from communication errors without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-valued optical signals are transmitted to increase data capacity, then productivity is improved, but measurement precision of bit error rate deteriorates due to difficulty in detecting signal levels
Solution Approach 1:
The patent applies preliminary action by transmitting a predetermined bit pattern (training sequence) before actual data transmission. This training sequence allows the receiver to预先 establish reference levels for detecting the multiple signal levels, thereby enabling accurate bit error rate measurement despite the complexity of multi-valued signals. The receiver uses this preliminary information to configure its detection thresholds and improve measurement precision.
2Reliability
If optical power levels are adjusted manually to correct communication errors, then reliability is improved, but ease of operation deteriorates due to requiring manual intervention
Solution Approach 1:
The patent implements feedback by having the receiver measure the bit error rate and transmit this measurement back to the transmitter via the adjustment signal line. The transmitter then automatically adjusts its optical power levels based on this feedback information, eliminating the need for manual intervention. This closed-loop feedback mechanism maintains communication reliability while significantly improving ease of operation.
Solution Approach 2:
The system applies self-service by enabling the optical transceiver to automatically detect communication errors, measure bit error rates, and adjust its own transmission parameters without external manual intervention. The transmitter self-corrects communication issues by processing the feedback from the receiver and autonomously optimizing its output power levels.
3Ease of operation
If automatic adjustment of optical power is implemented to improve ease of operation, then ease of operation is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent applies universality by making the adjustment signal line serve multiple functions: it is used both for transmitting control commands from the transmitter to the receiver and for feeding back measurement information from the receiver to the transmitter. This multi-functional use of existing infrastructure enables automatic power adjustment without adding dedicated complex feedback hardware, thereby improving ease of operation while limiting the increase in device complexity.
4Reliability
If bit error rate measurement is performed continuously to improve reliability, then reliability is improved, but loss of time increases due to measurement overhead
Solution Approach 1:
The patent applies periodic action by performing bit error rate measurements at specific intervals using predetermined bit patterns rather than continuously monitoring every data transmission. This periodic measurement approach maintains sufficient reliability for detecting communication errors while minimizing the time overhead associated with measurements, allowing normal data transmission to proceed uninterrupted between measurement cycles.
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 solution enables the communication system to automatically return to a stable state by adjusting optical power levels based on bit error rates, ensuring reliable communication by minimizing errors and reducing the need for manual intervention.
Implementation Method 1
an approach to set an amplitude at each level of an input electrical signal to a laser element, based on the relationship between the input electrical signal and luminescence intensity obtained for the laser element
Implementation Method 2
a first optical receiver configured to receive an optical adjustment signal that is transmitted from a second optical transceiver to reproduce an adjustment signal from the optical adjustment signal
Data Source
AI summary
A first optical transceiver includes a transmission signal processor that generates a multi-valued pulse amplitude modulation signal including a fixed bit pattern. The first optical transceiver includes an optical transmitter that transmits the multi-valued pulse amplitude modulation signal as an optical transmission signal. The first optical transceiver includes an optical receiver that receives an optical adjustment signal from a second optical transceiver to reproduce an adjustment signal from the optical adjustment signal. The first optical transceiver includes a first controller that controls the transmission signal processor based on a bit error rate included in the optical adjustment signal to adjust light power at each level of the optical transmission signal.