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US 8,301,919 B2Granted
System and method for implementing fairness in the powering of computing devices in a power over Ethernet application
AssigneeBroadcom Corporation
InventorsWael William Diab, Hemal Vinodchandra Shah, Simon Assouad
Life of this patent
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Abstract
A system and method for implementing fairness in the powering of computing devices in a power over Ethernet (PoE) application. Power supplies in a power sourcing equipment are often oversubscribed. This oversubscription can lead to starvation of certain computing devices that have power requests that are not granted relative to competing requests. A fairness consideration can be implemented to ensure that starvation conditions are avoided.
Claims16
A power over Ethernet method, comprising:
- receiving at least two power requests from a computing device, each of said power requests representing alternative requests for power for said computing device, wherein neither of said at least two power requests are received after a denial of a previous power request;
- approving one of said at least two power requests;
- and
- allocating power to said computing device based on said approved power request.
1 more element
A power over Ethernet method, comprising:
- receiving a power request from a computing device;
- and
- allocating power to said computing device based on approval of said power request, wherein said allocation of power to said computing device is limited in duration to a period of time that is identified prior to said allocation, wherein said period of time is determined at a switch that receives said power request and is based on a power subscription level at said switch.
A power over Ethernet system, comprising:
- a detection component that determines whether a powered device that is coupled to said power over Ethernet system via a network cable is a valid device for receiving power;
- and
- a controller that is configured to analyze at least two power requests that are received from said powered device, each of said power requests representing alternative requests for power for said powered device, wherein neither of said at least two power requests are received after a denial of a previous power request, said controller being further configured to approve one of said at least two power requests and allocate power to said powered device based on said approved power request.
Dependencies are inferred from the claim text.