Power management method and apparatus for power sourcing equipment

Patent metadata

Field	Value
Publication number	US-12549396-B2
Application number	US-202318400303-A
Country	US
Kind code	B2
Filing date	Dec 29, 2023
Priority date	Jun 30, 2021
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

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.

First claim

What is claimed is:

1 . A method, comprising:
supplying, through a plurality of ports of a power sourcing equipment (PSE) and to a plurality of powered devices (PDs), power; setting, based on a power usage status, reserved power of the PSE, wherein the reserved power varies with the power usage status, wherein the power usage status comprises a power change frequency of the PSE, wherein the power change frequency indicates a change frequency of total power actually used by the PSE through the plurality of ports, and wherein setting the reserved power comprises: measuring a first power change rate of the total power actually used by the PSE through the plurality of ports, wherein the first power change rate is greater than or equal to a threshold; setting, in response to measuring the first power change rate, the reserved power of the PSE to a first power value; measuring a second power change rate of the total power actually used by the PSE through the plurality of ports, wherein the second power change rate is less than the threshold; and setting, in response to measuring the second power change rate, the reserved power of the PSE to a second power value, wherein the first power value is greater than the second power value; determining that actual available power of the PSE is exhausted; and continuing supplying, to the plurality of PDs and using the reserved power, the power based on the determining that the actual available power of the PSE is exhausted.

2 . The method of claim 1 , wherein the plurality of ports comprises used ports, wherein the used ports comprise a first port having a lowest priority of the used ports, and wherein setting the reserved power comprises setting, based on applied power or used power of a first one of the plurality of PDs connected to the first port, the reserved power.

3 . The method of claim 2 , wherein setting the reserved power comprises:
setting the applied power or n times the applied power as the reserved power, wherein n is a first constant greater than 1; or setting m times the used power, wherein m is a second constant greater than 1.

4 . The method of claim 1 , wherein the actual available power is a difference of entire available power of the PSE and the reserved power, and wherein the change frequency of the total power actually used by the PSE through the plurality of ports is for two or more detection periodicities.

5 . The method of claim 1 , further comprising:
continuing supplying, to a first one of the plurality of PDs, the power when the actual available power is not exhausted, wherein the actual available power is a first difference of entire available power of the PSE and the reserved power; powering off the first one of the plurality of PDs when a first accumulated duration in which the actual available power is exhausted but the reserved power is not exhausted reaches a preset first threshold; and powering off the first one of the plurality of PDs when the reserved power is exhausted.

6 . The method of claim 5 , further comprising calculating: a power overload capacity as a second difference of total power actually used by the PSE and the actual available power, wherein the actual available power is exhausted but the reserved power is not exhausted when the power overload capacity is greater than or equal to zero and less than the reserved power, and wherein the reserved power is exhausted when the power overload capacity is greater than or equal to the reserved power.

7 . The method of claim 5 , wherein the preset first threshold comprises a preset second threshold and a preset third threshold, wherein the preset second threshold is greater than the preset third threshold, and wherein powering off the first one of the plurality of PDs when the first accumulated duration reaches the preset first threshold comprises:
powering off the first one of the plurality of PDs when a second accumulated duration in which the power overload capacity is greater than or equal to zero and less than actually used power reaches the preset second threshold; and powering off, the first one of the plurality of PDs when a third accumulated duration in which the power overload capacity is greater than or equal to the actually used power and less than the reserved power reaches the preset third threshold.

8 . The method of claim 7 , further comprising powering on the first one of the plurality of PDs again when remaining power is greater than applied power of the first one of the plurality of PDs, wherein the remaining power is a second difference of the actual available power and total power actually used by the PSE after the first one of the plurality of PDs is powered off.

9 . The method of claim 1 , further comprising:
calculating maximum allowable overload power of each of the plurality of PDs connected to one of a plurality of powered-on ports of the PSE; powering off a first one of the plurality of PDs connected to a first one of the plurality of powered-on ports when a first accumulated duration in which power used by the first one of the plurality of PDs is greater than applied power of the first one of the plurality of PDs but is less than or equal to the maximum allowable overload power reaches a preset first threshold; and powering off the first one of the plurality of PDs when the power is greater than the maximum allowable overload power.

10 . The method of claim 1 , wherein setting the reserved power of the PSE further comprises setting the reserved power of the PSE based on a power change amplitude of the PSE.

11 . A method, comprising:
calculating a first power overload capacity as a first difference of first total power actually used by a power sourcing equipment (PSE) to supply first power to a plurality of powered devices (PDs) and first actual available power of the PSE, wherein the first total power is a first sum of first actual power used by a plurality of powered-on ports, and wherein the first actual available power is a second difference of entire available power of the PSE and reserved power; continuing supplying, to the plurality of PDs, the first power during a first interval, power, wherein the first interval includes a range where the first power overload capacity is less than 0; calculating a second power overload capacity as a third difference of second total power actually used by the PSE to supply second power to the plurality of PDs and second actual available power of the PSE, wherein the second total power is a second sum of second actual power used by the plurality of powered-on ports, and wherein the second actual available power is a fourth difference of the entire available power of the PSE and the reserved power; determining that a first accumulated duration in which the second power overload capacity falls into a second interval reaches a preset threshold; and powering off one or more of the plurality of PDs based on the determining that the first accumulated duration in which the second power overload capacity falls into the second interval reaches the preset threshold, wherein the second interval is [0, P s ), and wherein P s is the reserved power.

12 . The method of claim 11 , wherein the second interval comprises a trigger zone and a dangerous zone, wherein the trigger zone is [0, P r ), wherein the dangerous zone is [P r , P s ), wherein P r is actually used power of a first PD connected to a first port of the PSE, and wherein the first port has a lowest priority in a plurality of used ports of the PSE.

13 . The method of claim 12 , wherein the preset first threshold comprises a preset second threshold and a preset third thresh

Assignees

• Huawei Tech Co Ltd

Inventors

• Zou Mujie
• Deng Chenhui
• Niu Shenghua
• Gu Chao
• Chen Weibiao

Classifications

• H04L12/40045

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