Adaptive Transient Compensation in Physical Layer Transceivers
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Solution Overview
Problem
Asymmetric Energy-Efficient Ethernet links induce transient errors and interference in full-data traffic due to periodic or predictable signals from low-power-idle modes, which can lead to suboptimal power savings and communication disruptions.
Innovation Solution
Incorporating transient error compensation circuitry into physical layer transceivers to detect and subtract transient errors, and to power off analog components in low-power-idle modes, thereby mitigating interference and enhancing power savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If periodic or predictable signals are transmitted in low-power-idle mode, then power savings are achieved, but transient errors and interference are induced in full-data traffic
Solution Approach 1:
The patent detects transient errors caused by periodic signals in low-power-idle mode and uses adaptive transient compensation circuitry to generate correction signals that cancel these errors. This converts the harmful transient interference into a correctable distortion, allowing both power savings from LPI mode and error-free full-data traffic to coexist.
2Reliability
If analog components are kept active to avoid transient errors, then communication reliability is maintained, but power savings in low-power-idle mode are reduced
Solution Approach 1:
The patent extracts and identifies the specific transient error components caused by periodic signals from the full-data traffic using detection circuitry. By separating the harmful transient signals from the legitimate data, the system can selectively compensate only for the transient errors while allowing analog components to be powered down during low-power-idle mode, achieving both reliability and power efficiency.
Solution Approach 2:
The patent employs adaptive transient compensation that dynamically adjusts compensation parameters based on detected transient error characteristics. This allows the system to maintain high communication reliability by adapting to varying transient conditions while keeping analog components in low-power state, rather than requiring them to remain continuously active.
3Reliability
If transient error compensation circuitry is added, then error-free communication is achieved, but device complexity increases
Solution Approach 1:
The patent integrates the transient error compensation functionality into the existing physical layer transceiver architecture by merging the compensation circuitry with the analog-to-digital converter and digital signal processing components. This consolidation achieves error-free communication while minimizing the increase in device complexity through shared hardware resources and unified processing pipelines.
Data Source
AI summary
A physical layer transceiver (PHY) includes transmit circuitry including digital and analog transmit portions, receive circuitry including digital and analog receive portions, coupling circuitry configured to couple signals from the transmit circuitry onto a transmission medium, and to couple signals off the transmission medium to the receive circuitry, and transient error compensation circuitry coupled to the digital receive portions and to the analog transmit portions, and configured to detect transient error induced in the receive circuitry by the analog transmit portions and to subtract a transient error correction from data in the receive circuitry. The PHY may include asymmetric Energy-Efficient Ethernet (EEE) controller circuitry, and when the transmit circuitry is in the leg operating in EEE low-power-idle mode, the transient error compensation circuitry may detect transient error induced in the receive circuitry of the leg operating in full-data mode and apply a transient error correction.