Ethernet Link Transmit Power Adjustment for Alien Crosstalk Mitigation
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Solution Overview
Problem
Existing Ethernet communication systems face significant performance degradation due to alien crosstalk interference from newly installed links, which conventional standards fail to account for, leading to reduced data rates and signal quality in existing links.
Innovation Solution
The implementation of an Ethernet network architecture that includes a method for detecting and mitigating alien crosstalk through adaptive filter coefficients and feedback-based adjustments in transmit power and data rate, using digital signal processors and alien performance detection circuitry to optimize link performance without impacting neighboring links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If new Ethernet links are installed with conventional transmit power settings, then the new links can operate at higher data rates, but existing links experience performance degradation due to alien crosstalk interference
Solution Approach 1:
The patent implements a feedback mechanism where the network device monitors performance metrics (such as error rates, signal quality) of existing Ethernet links and communicates this information back to the new link. Based on this feedback, the transmit power of the new link is dynamically adjusted to minimize alien crosstalk impact while maintaining optimal data rate. This closed-loop control resolves the contradiction by enabling the new link to operate at high data rates only when it does not degrade existing link performance.
Solution Approach 2:
The patent transitions from static transmit power settings to dynamic power adjustment. The transmit power of the new Ethernet link is no longer fixed but is continuously adapted based on real-time network conditions and the impact on existing links. This dynamic approach allows the system to optimize the data rate of new links while preventing performance degradation of existing links, resolving the contradiction between productivity and reliability.
2Productivity
If transmit power of new Ethernet link is increased to achieve higher data rates, then productivity of new link improves, but alien crosstalk interference on existing links increases
Solution Approach 1:
The network device monitors performance metrics of existing links and provides feedback to the new link's transmit power control. When alien crosstalk interference exceeds acceptable thresholds, the feedback mechanism triggers power reduction on the new link, directly addressing the harmful effect while allowing maximum productivity when interference is minimal.
Solution Approach 2:
The patent dynamically changes the transmit power parameter of the new Ethernet link based on monitored conditions. By adjusting this critical parameter in response to network conditions, the system enables high data rates (productivity) only when the harmful alien crosstalk interference remains below thresholds that would degrade existing link performance.
3Ease of operation
If conventional link training process is used without alien crosstalk consideration, then setup is simpler and faster, but existing links suffer performance degradation
Solution Approach 1:
The patent merges the link training process with alien crosstalk assessment and mitigation. Instead of separate steps, the training process now incorporates monitoring of existing link performance and iterative adjustment of transmit power parameters. This integrated approach maintains operational simplicity while preventing performance degradation of existing links.
Solution Approach 2:
The patent performs preliminary assessment of potential alien crosstalk impact during the link training phase, before full operation begins. By evaluating the impact on existing links during setup and adjusting parameters in advance, the system prevents future performance degradation while maintaining ease of operation through automated preliminary configuration.
Data Source
AI summary
A method of operation on an Ethernet network having multiple Ethernet links interconnected via a network device. The method includes detecting installation of a new Ethernet link in the Ethernet network utilizing the network device. A link training process is then initiated for the new Ethernet link. The link training process includes transmitting training data at a first transmit power level and first data rate to a link partner during a data transfer interval. Network feedback information is then accessed, including performance metrics associated with the multiple Ethernet links during the training data transfer interval. The first data rate and/or first transmit power level are then adjusted to an adjusted second data rate and/or second transmit power level based on the network feedback information.