Optical Channel Phase Compensation for Faster Clock Recovery
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Solution Overview
Problem
Optical networks experience significant phase differences between optical signals and sampling clock signals, leading to reduced data recovery accuracy and increased bit error rates, necessitating lengthy clock recovery delays and high preamble overheads, which decrease data transmission efficiency.
Innovation Solution
Implement a method in optical networks to compensate for phase errors by using phase compensation coefficients determined by a controller based on optical channel identifiers, allowing optical transmitting devices to send data with phase correction in allocated slots, thereby reducing the need for preambles and shortening clock recovery delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the optical receiving device uses traditional clock recovery method with preamble detection, then the phase error can be detected and corrected, but the clock recovery delay becomes long and data transmission efficiency is reduced
Solution Approach 1:
The patent applies preliminary action by having the optical transmitting device perform phase compensation in advance using a phase compensation coefficient before data transmission. The controller determines the phase compensation coefficient based on optical channel characteristics, and the transmitting device pre-adjusts the phase of optical signals. This eliminates the need for lengthy preamble-based clock recovery at the receiving end, as the phase is already compensated before transmission.
2Measurement precision
If the optical receiving device uses traditional preamble-based phase detection, then phase errors can be detected, but preamble overheads increase and data transmission efficiency decreases
Solution Approach 1:
The patent implements preliminary action by performing phase compensation at the transmitting device before data transmission. The controller determines the phase compensation coefficient based on optical channel characteristics, and the transmitting device pre-adjusts the phase of optical signals. This eliminates the need for lengthy preamble-based clock recovery at the receiving end, as the phase is already compensated before transmission.
Solution Approach 2:
The patent introduces a controller as an intermediary that determines the phase compensation coefficient based on optical channel characteristics. The controller acts as a mediator between the transmitting and receiving devices, calculating the appropriate phase compensation value and providing it to the transmitting device. This intermediary approach enables efficient phase compensation without requiring complex preamble-based detection at the receiver.
3Adaptability or versatility
If the optical receiving device receives optical signals with large phase differences, then it can handle multiple transmitting devices, but data recovery accuracy is reduced and bit error rate increases
Solution Approach 1:
The patent applies local quality by implementing phase compensation tailored to each specific optical channel. The controller determines a specific phase compensation coefficient for each optical channel based on its characteristics (such as fiber length, dispersion, and environmental conditions). Each transmitting device then applies the appropriate phase compensation to its optical signals before transmission, ensuring that phase errors are corrected locally for each channel rather than using a universal approach.
Data Source
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AI summary
This application discloses a method, a system, and a related device. A controller may determine a first optical channel between an optical transmitting device and an optical receiving device in a first slot based on a data transmission request, and then send configuration information to the optical transmitting device, to indicate the optical transmitting device to send first data to the optical receiving device in the first slot based on a phase compensation coefficient of the first optical channel, so as to compensate for a phase error caused by the first optical channel, thereby improving data recovery accuracy of the optical receiving device, and reducing a bit error rate.