US 11,797,070 B2
Response mechanisms for power-interruption events in PoE systems
Hong Yi Wee, Singapore (SG); Kah Hoe Ng, Johor (MY); and Shiyu Tian, Singapore (SG)
Assigned to Hewlett Packard Enterprise Development LP, Spring, TX (US)
Filed by HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP, Houston, TX (US)
Filed on Jul. 10, 2020, as Appl. No. 16/925,928.
Prior Publication US 2022/0011841 A1, Jan. 13, 2022
Int. Cl. G06F 1/3296 (2019.01); G06F 1/30 (2006.01); G06F 1/28 (2006.01)
CPC G06F 1/30 (2013.01) [G06F 1/28 (2013.01); G06F 1/3296 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, at a Power Sourcing Equipment (PSE), power from at least a first Power Supply Unit (PSU) and a second PSU;
providing power to at least a first Powered Device (PD) via a first Ethernet cable and a second PD via a second Ethernet cable;
detecting, by processing circuitry in the PSE, while providing power to the first PD and the second PD, an interruption to a flow of power from the first PSU to the PSE; and
in response to detecting the interruption:
ceasing to provide power to the first PD via the first Ethernet cable while continuing to provide power to the second PD via the second Ethernet cable;
sending a first network communication from the PSE to the second PD indicating that the interruption has occurred and requesting that the second PD enter a power-saving mode of the second PD;
receiving a second network communication sent from the second PD to the PSE in response to the first network communication, the second network communication indicating whether the second PD is willing to enter the power-saving mode of the second PD;
based on the second network communication, reducing an amount of power allocated to the second PD from an initial value to a reduced value;
allocating an amount of power to the first PD that is based on a difference between the initial value and the reduced value; and
instructing the first PD to power on in a power-saving mode of the first PD.