Dynamic Power Control for Energy Efficient Physical Layer Devices
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Solution Overview
Problem
Energy-efficient Ethernet networks face challenges in reducing power consumption, particularly when paired with legacy devices that lack energy-saving features, as existing solutions often require standardized energy-saving capabilities across all link partners, limiting energy savings when compatibility is not met.
Innovation Solution
A dynamic power control mechanism for physical layer communication devices that analyzes link-related parameters to identify idle sequences and implement asymmetric energy-saving strategies, such as powering down receivers during idle signals and using fuzzy logic to adapt energy-saving thresholds, allowing energy-efficient operation even with legacy devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If asymmetric power control is implemented to save energy when paired with legacy devices, then power consumption is reduced, but link stability may be compromised
Solution Approach 1:
The patent implements dynamic power control where the energy-efficient device adjusts its power state based on real-time link conditions and traffic patterns. The device transitions between active and low-power states dynamically, monitoring link health metrics to ensure stability while maximizing energy savings during appropriate periods.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor link quality, error rates, and traffic patterns to determine when to transition power states. This feedback loop ensures that power-saving modes are activated only when link stability is maintained, allowing the device to adapt to changing conditions while preserving reliability.
2Use of energy by moving object
If receiver is powered down during idle signals to save energy, then power dissipation is reduced, but link responsiveness may be degraded
Solution Approach 1:
The device performs preliminary actions by maintaining certain link parameters and synchronization information in a ready state even when the receiver is powered down. This allows for faster wake-up and resumption of normal operation, reducing the responsiveness degradation that would otherwise occur from complete power shutdown.
Solution Approach 2:
The system implements periodic monitoring or wake-up cycles where the receiver briefly activates to check for incoming traffic or maintain link synchronization. This periodic action balances energy savings with link responsiveness, allowing the device to remain mostly powered down while still detecting and responding to important link events.
Data Source
AI summary
A system and method for dynamic power control for energy efficient physical layer communication devices. Energy-efficiency features are continually being developed to conserve energy in links between such energy-efficient devices. These energy-efficient devices interoperate with many legacy devices that have already been deployed. In these links, energy savings can be produced by having a local receiver enter an energy saving state based upon the receipt of standard IDLE signals.