Response mechanisms for power-interruption events in poe systems
AssigneeHewlett Packard Enterprise Development LP
InventorsHong Yi Wee, Kah Hoe Ng, Shiyu Tian
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Abstract
Systems and methods disclosed herein allow efficient reallocation of PoE when a PSU for a PSE fails. A PSE initially receives power from at least two PSUs and provides PoE to at least two PDs. When power from one of the PSUs becomes unavailable, the PSE refrains from providing PoE to a first PD, but continues providing PoE to a second PD. The PSE sends a communication to the second PD requesting that the second PD allow the PSE to allocate less power to the second. If the second PD confirms that allocating less power to the second PD is acceptable, the PSE reduces the amount of power allocated to the second PD and allocates at least some of the power saved by the reduction to the first PD.
Claims20
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, at the PSE while providing power to the first PD and the second PD, that an event has interrupted a flow of power from the first PSU to the PSE;
- in response to detecting the event, 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 event has occurred and requesting that the second PD permit the PSE to reduce an amount of power allocated to the second PD;
- receiving a second network communication sent from the second PD to the PSE in response to the first network communication;
- based on the second network communication, reducing an amount of power allocated to the second PD from an initial value to a reduced value;
- and
- allocating an amount of power to the first PD that is no greater than a difference calculated by subtracting the reduced value from the initial value.
A Power Sourcing Equipment (PSE) comprising:
- one or more processors;
- a first Ethernet port;
- a second Ethernet port;
- and
- a memory storing instructions that, when executed on the one or more processors, perform a set of actions, the set of actions comprising:
- receiving, at the 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 plugged into the first Ethernet port and a second PD via a second Ethernet cable plugged into the second Ethernet port;
- detecting, at the PSE while providing power to the first PD and the second PD, that an event has interrupted a flow of power from the first PSU to the PSE;
- in response to detecting the event, 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 event has occurred and requesting that the second PD permit the PSE to reduce an amount of power allocated to the second PD;
- receiving a second network communication sent from the second PD to the PSE in response to the first network communication;
- based on the second network communication, reducing an amount of power allocated to the second PD from an initial value to a reduced value;
- and
- allocating an amount of power to the first PD that is no greater than a difference calculated by subtracting the reduced value from the initial value.
A powered device (PD) comprising:
- one or more processors;
- an Ethernet port;
- and
- a memory storing instructions that, when executed on the one or more processors, perform a set of actions, the set of actions comprising:
- receiving, at the PD, power from a Power Sourcing Equipment (PSE) via an Ethernet cable that is plugged into the Ethernet port;
- receiving a first network communication from the PSE indicating that an event has interrupted a flow of power from a PSU to the PSE and requesting that the PD permit the PSE to reduce an amount of power allocated to the second PD;
- and
- sending a second network communication to the PSE in response to the first network communication indicating whether the PD is willing to switch into a power-saving mode.
Dependencies are inferred from the claim text.