PoE Power Reservation and Prioritization Under Dynamic Lease Conditions

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Solution Overview

Problem

Conventional power distribution networks fail to dynamically allocate power based on real-time demand, device capabilities, and network conditions, leading to inefficient power utilization and resource contention, especially in networks with varying device numbers and priorities.

Innovation Solution

A system that utilizes a power delivery logic to manage power allocation through a combined data/power interface, such as Ethernet ports, to prioritize and reserve power based on device parameters and dynamic lease conditions, adjusting power delivery in response to network changes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If static allocation of power is used to all devices, then simplicity of power distribution is maintained, but power utilization efficiency deteriorates

Engineering Contradiction:

Improvepower distribution complexityVSAvoidpower waste

Core Design Contradiction:

Device complexityVSLoss of energy

Solution Approach 1:

The patent implements dynamic power allocation where the power delivery controller continuously monitors network conditions, device power demands, and available power resources. Power allocations are adjusted in real-time based on changing conditions, transitioning from static to dynamic control to improve power utilization efficiency while managing complexity through automated algorithms.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system employs feedback mechanisms where the power delivery controller receives power demand indications from devices, monitors actual power consumption, and compares it against available power resources. Based on this feedback loop, the controller dynamically adjusts power allocations to optimize efficiency while preventing power waste.

Inventive Principle:

Principle #23Feedback

2Reliability

If power is delivered to all devices at all times, then device availability is improved, but power resource utilization deteriorates

Engineering Contradiction:

Improvedevice availabilityVSAvoidpower resource utilization

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes power delivery parameters dynamically based on device priority levels, power demand indications, and available power resources. Critical devices receive higher power allocations while non-critical devices receive reduced or no power during resource constraints, optimizing overall power resource utilization while maintaining essential device availability.

Inventive Principle:

Principle #35Parameter changes

3Loss of energy

If devices are turned off or placed in power saving modes to reduce power consumption, then power efficiency is improved, but network performance deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidnetwork performance

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent applies differentiated power management to different devices based on their priority levels and functions. Critical network devices maintain full power operation to ensure network performance, while non-critical devices receive power saving treatments. This localized quality approach ensures network performance is maintained where needed while reducing overall power consumption.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Inventive Principle:

Principle #35Parameter changes

4Duration of action of stationary object

If devices utilize power without relinquishing when no longer needed, then device operation continuity is improved, but resource contention deteriorates

Engineering Contradiction:

Improvepower allocation durationVSAvoidpower resource adaptability

Core Design Contradiction:

Duration of action of stationary objectVSAdaptability or versatility

Solution Approach 1:

The patent implements periodic power allocation reviews where the power delivery controller regularly reassesses device power demands, updates power demand indications from devices, and recalculates optimal power allocations based on current available power resources. This periodic action ensures power is relinquished from devices that no longer need it and reallocated to devices with higher priority or greater demand, improving resource adaptability while maintaining operational continuity.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250385519A1Prioritization and Reservation of Power in Power over Ethernet and Fault Managed Power Systems

Publication Date: 2025.12.18 CISCO TECHNOLOGY INC

AI summary

Devices, networks, systems, methods, and processes for delivering power to a plurality of powered devices in a network are described herein. A controller may receive a lease request from a powered device. The controller can extract one or more requested parameters from the lease request. The controller can determine one or more device parameters associated with the powered device and one or more dynamic lease conditions associated with a power resource. If the one or more device parameters and/or the one or more requested parameters meet the one or more dynamic lease conditions, the controller can grant the lease request. The controller may deliver power to the powered device upon the grant of the lease request. The controller can dynamically update the one or more dynamic lease conditions and monitor the lease to check whether the lease complies with the one or more updated dynamic lease conditions.