PoE Power Sourcing Control for Dynamic Reserved Power Allocation
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Solution Overview
Problem
The repeated power-on and power-off of low-priority ports in power over Ethernet (POE) systems due to fixed reserved power settings leads to inefficient power utilization and reduced availability of power for connected devices.
Innovation Solution
A power management method for PSE that dynamically adjusts reserved power based on the power usage status, including factors such as applied and used power, power change frequency, and power overload capacity, to optimize power distribution and minimize repeated power cycling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed reserved power is set to prevent repeated power-on and power-off of low-priority ports, then reliability of power supply is improved, but power utilization deteriorates
Solution Approach 1:
The patent transforms the static fixed reserved power setting into a dynamic adjustment mechanism. The PSE controller continuously monitors power consumption of high-priority ports and adjusts the reserved power for low-priority ports in real-time. When high-priority power consumption is low, more power is allocated to low-priority ports; when high-priority power consumption increases, reserved power is reduced. This dynamic allocation prevents repeated power cycling while maximizing overall power utilization.
Solution Approach 2:
The patent changes the parameter of reserved power from a fixed value to a variable that adapts based on system conditions. By monitoring power consumption patterns and adjusting the reserved power parameter dynamically, the system resolves the contradiction between maintaining supply stability and maximizing energy utilization. The controller modifies power allocation parameters based on real-time measurements of actual power consumption.
2Reliability
If fixed reserved power is set to avoid repeated power cycling, then reliability of power delivery is improved, but power consumption efficiency deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the PSE controller continuously monitors the actual power consumption of high-priority ports and uses this information to adjust reserved power allocation to low-priority ports. The controller receives feedback about power usage patterns and dynamically modifies power distribution accordingly. This closed-loop control ensures reliable power delivery while optimizing energy consumption efficiency by allocating power based on actual needs rather than fixed reservations.
Data Source
AI summary
A power management method includes power sourcing equipment (PSE) supplying power to a plurality of powered devices (PDs), and determining reserved power of the PSE based on a power usage status, where the reserved power is used to continue supplying power to the plurality of PDs when actual available power of the PSE is exhausted, and where the reserved power varies with the power usage status of the PSE.