PoE Power Sourcing Equipment Priority-Based Backup Power Allocation
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Solution Overview
Problem
Conventional Power over Ethernet (PoE) systems face challenges in power allocation and prioritization during power failures, leading to inefficient use of backup power resources and poor management of Uninterruptible Power Supply (UPS) and Power Sourcing Equipment (PSE) interactions, resulting in equipment costs and operational inefficiencies.
Innovation Solution
Implementing enhanced UPS-related communications and prioritization techniques within the PSE to manage backup power allocation and de-allocation based on device priority, and improving communication between the PSE and UPS to automate resource management and prevent misconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If backup power resources are increased to support all PDs during power failure, then power availability to PDs is improved, but system cost and complexity increase
Solution Approach 1:
The system segments PDs into different priority classes (e.g., critical and non-critical devices). During power failure, the PSE selectively provides backup power to high-priority PDs while denying power to low-priority PDs. This segmentation allows the system to maintain reliability for essential devices without needing to provision backup power for all devices, thereby reducing overall system cost and complexity.
Solution Approach 2:
Different quality levels of power service are provided to different PDs based on their priority classification. Critical PDs receive uninterrupted backup power service, while non-critical PDs receive no backup power. This local differentiation of service quality optimizes the balance between reliability and cost by allocating limited backup power resources to where they are most needed.
2Ease of operation
If manual UPS/PSE management is used, then ease of operation is improved, but detection accuracy of misconnections deteriorates
Solution Approach 1:
The system implements self-service management where the PSE automatically discovers connected PDs, determines their priority levels, and autonomously manages power allocation during failures. The system self-monitors UPS status and automatically adjusts power distribution without requiring manual intervention. This automation maintains operational simplicity while significantly improving detection accuracy of misconnections and resource allocation issues.
Solution Approach 2:
The system continuously monitors UPS status, power consumption of connected PDs, and available backup power capacity. Based on this feedback, the PSE dynamically adjusts power allocation decisions. This feedback mechanism enables the system to detect misconnections and resource constraints automatically, improving measurement precision without complicating user operation.
3Adaptability or versatility
If power is provided to all PDs during backup mode, then power distribution fairness is improved, but backup power duration decreases
Solution Approach 1:
The system dynamically adjusts power distribution strategy based on real-time conditions. During normal operation, all PDs receive full power. During power failure, the system transitions to a dynamic prioritization mode where power allocation is adjusted based on PD priority levels. This dynamic adaptation allows the system to extend backup power duration by denying power to non-critical devices while maintaining fairness and priority-based equity for critical devices.
Data Source
AI summary
A controller in PSE (Power Sourcing Equipment) controls how to provision uninterruptible power through corresponding ports (and cables) of the PSE to network devices. For example, the controller of the PSE receives a signal indicating a transition of powering the PSE from a primary power input to a backup power supply. The backup power supply has a limited ability to provide backup power to the PSE. In response to receiving the signal, the controller of the PSE utilizes a powering/de-powering algorithm to generate control information used by the controller to selectively discontinue providing power through the certain ports to respective network devices. Consequently, the PSE and, more specifically, the controller provisions power from the PSE depending on a priority level associated with network devices, extending the power life of critical powered network devices and more efficiently using the backup power supply in the case of a power failure.