Controlling Circuit Power Saving Mechanism Erroneous Wake-Up Prevention
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Solution Overview
Problem
Current network devices face challenges in implementing a standard power saving mechanism and preventing erroneous wake-ups during low power idle modes due to the lack of auto-negotiation capabilities and echo reflections in data transmitting systems, leading to inefficiencies and errors.
Innovation Solution
A controlling circuit with a power saving mechanism and an erroneous wake-up prevention mechanism, featuring a transmitting interface, setting unit, receiver, adjusting circuit, filtering circuit, echo cancellation circuit, and determining circuit, which adjusts threshold values and frequencies to distinguish valid signals from echoes and ensure proper wake-up, conforming to IEEE 802.3az Energy Efficient Ethernet standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the receiver enters low power consumption mode to save energy, then power consumption is reduced, but the receiver may be erroneously woken up by echo signals
Solution Approach 1:
An echo cancellation circuit is introduced as an intermediary component between the receiver and the wake-up detection mechanism. This circuit actively cancels out echo signals by generating anti-phase signals, preventing them from triggering false wake-up events while allowing the receiver to maintain low power consumption mode during idle periods
Solution Approach 2:
The system dynamically changes the sensitivity threshold parameter of the wake-up detection mechanism based on operational state. During low power mode, the threshold is adjusted to be less sensitive to weak echo signals, while maintaining high sensitivity to valid wake-up triggers, thus preventing erroneous wake-ups while preserving energy
2Adaptability or versatility
If auto-negotiation capability is implemented to standardize power saving mechanisms, then compatibility and standardization are improved, but device complexity increases
Solution Approach 1:
The system performs preliminary configuration of power saving parameters and echo cancellation settings before entering low power mode. By pre-configuring the operational parameters based on expected traffic patterns and link characteristics, the system achieves standardized behavior without requiring complex runtime auto-negotiation protocols
Solution Approach 2:
The controlling circuit autonomously manages power state transitions and echo cancellation without requiring complex negotiation with remote devices. The system self-determines when to enter/exit low power mode based on local traffic conditions and self-configures the echo cancellation parameters, eliminating the need for standardized auto-negotiation handshaking
3Reliability
If the receiver remains in high power mode to avoid erroneous wake-up, then reliability is improved, but power consumption increases
Solution Approach 1:
The echo cancellation circuit serves as a protective intermediary that filters out harmful echo signals before they can trigger false wake-up events, enabling the receiver to safely operate in low power mode without compromising reliability
Solution Approach 2:
The system applies partial echo cancellation by selectively targeting only the frequency and amplitude characteristics of echo signals rather than processing all incoming signals at full power, achieving sufficient protection against erroneous wake-ups while maintaining energy efficiency
Data Source
AI summary
A controlling circuit supporting a power saving mechanism includes: a transmitting interface arranged to perform a signal transmission with a specific controlling circuit; and a setting unit coupled to the transmitting interface. The setting unit is arranged to control the specific controlling circuit to operate in the power saving mechanism.