System and method for policing bad powered devices in power over ethernet
AssigneeBroadcom Corporation
InventorSanjaya Maniktala
Life of this patent
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Abstract
A system and method for policing bad powered devices in power over Ethernet. Degradation of components within powered devices can lead to noise and ripple that exceed specified thresholds. This noise and ripple can adversely impact the operation of the power sourcing equipment. A noise detector implemented in the power sourcing equipment can detect the presence of such noise and ripple and modify the application of power to the particular port.
Claims20
A remote powering method in a power sourcing equipment, comprising:
- detecting a presence of a valid powered device that is capable of receiving power via a port, said powered device being coupled to said port via a cable;
- after completion of said detection of said power device applying power to said port at a first power level for powered operation of said powered device;
- determining, during said application of said power at said first power level whether a noise ripple level represented by a periodic variation of a voltage level on said cable exceeds a threshold level;
- and
- modifying an application of power to said port to a second power level if said determination indicates that said noise ripple level on said cable exceeds said threshold level.
A power sourcing equipment system, comprising:
- a power supply for delivering power to a port coupled to a valid powered device via a cable, wherein a validity of said powered device is determined using a detection process;
- a detector that determines, during a delivery of power by said power supply to said port, whether a noise ripple level represented by a periodic variation of a voltage level on said cable exceeds a threshold level;
- and
- a controller that modifies said delivery of power to said port based on said determination.
A power sourcing equipment system that is configured to deliver power to a valid powered device via a cable, wherein a validity of said powered device is determined using a detection process by said power sourcing equipment system, comprising:
- a detector that determines, while said power sourcing equipment system delivers power to said valid powered device via said cable, whether a noise ripple level represented by a periodic variation of a voltage level on said cable exceeds a threshold level;
- and
- a controller that modifies a delivery of power to said valid powered device based on said determination.
Dependencies are inferred from the claim text.