Network powered device

Patent metadata

Field	Value
Publication number	US-9547350-B2
Application number	US-201114352820-A
Country	US
Kind code	B2
Filing date	Oct 28, 2011
Priority date	Oct 28, 2011
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

Example embodiments disclosed herein relate to determining whether power is supplied at a power level to a network powered device. A network connector can be used to provide power and communications to the network powered device. The network powered device can represent itself to power sourcing equipment as a device using power at the power level. An indicator indicates whether power is supplied at the power level.

First claim

What is claimed is:

1. A network powered device comprising:
a network connector that can provide power and communications to the network powered device;
a power source that can provide power to the network powered device;
a power negotiation module to negotiate for the power from a power sourcing equipment connected via the network connector; and
a failure indicator to indicate, if the negotiation has failed, that the negotiation has failed,
wherein the negotiation includes providing a first current draw on the connection to the power sourcing equipment indicating a request for a first power level,
wherein, if the negotiation fails, a memory stores an indicator of the failed negotiation, and
wherein the power negotiation module is further caused to provide a second current draw on the connection to the power sourcing equipment indicating a request for a second power level based on the indicator.

2. The network powered device of claim 1 , wherein the failure indicator is powered by the power source if the negotiation has failed.

3. The network powered device of claim 1 , further comprising:
a success indicator to indicate, if the negotiation is successful, that the negotiation is successful.

4. The network powered device of claim 1 ,
wherein the negotiation is associated with a first power level,
wherein if the negotiation fails, the power negotiation module performs a second negotiation for the power at a second power level that is lower than the first power level.

5. The network powered device of claim 4 , further comprising:
a power level indicator to indicate, if the second negotiation is successful, the power level of the second negotiation.

6. The network powered device of claim 1 , further comprising:
a power selection module to select a power level associated with the negotiation for power.

7. The network powered device of claim 6 , wherein the power selection module comprises:
a controller to control what the network powered device presents itself as by causing circuitry to present a load based on a selected voltage level associated with a corresponding power classification.

8. The network powered device of claim 6 , wherein the power selection module comprises:
a switch to change electrical connections used for negotiation by enabling a resistor of a resistance associated with a corresponding power classification.

9. A method comprising:
powering a network powered device with an auxiliary power source,
wherein the network powered device includes a network connector that can provide power and communications when connected to a power sourcing equipment;
negotiating, at the network powered device, to obtain power at a first power level from the power sourcing equipment including:
providing a first current draw on the connection to the power sourcing equipment indicating a request for the first power level;

determining, at the network powered device, that the negotiation to obtain the power level was unsuccessful;
storing indicator information representative of an indication of unsuccessful negotiation when the negotiation to obtain the first power level was unsuccessful;
negotiating, at the network powered device, to obtain power at a second power level from the power sourcing equipment including:
providing, based on the indicator information, a second current draw on the connection to the power sourcing equipment indicating a request for the second power level; and

indicating, at the network powered device, that the negotiation was unsuccessful via an indicator disposed upon the network powered device.

10. The method of claim 9 , further comprising:
automatically setting up the network powered device for negotiation with the power sourcing equipment to obtain the power at second power level,
wherein, if the negotiation for the second power level is successful, indicating, at the network powered device, that the second power level was successful.

11. The method of claim 9 , further comprising:
setting the second power level used for the negotiation for the second power level based on user input.

12. The method of claim 11 , wherein the negotiation for the second power level is based on a representation made by the network powered device to the power sourcing equipment based on the set power level.

13. The method of claim 9 , wherein the determination that the negotiation for the first power level was unsuccessful is based on whether the network powered device receives power via the network connector.

14. The method of claim 9 , wherein the indicating that the negotiation was unsuccessful occurs while not receiving power at the first power level from the power sourcing equipment.

15. A non-transitory machine-readable storage medium storing instructions that, if executed by a processor of a network powered device, cause the processor to:
determine a first power classification to request power via a network connector from a power sourcing equipment,
wherein the network powered device includes an auxiliary power source;
cause identification of the network powered device to be presented to the power sourcing equipment via the network connector;
cause a first current draw on a connection to the power sourcing equipment via the network connector to request power at a first power level associated with the first power classification;
determine that the request for power was unsuccessful;
store an indicator that the request for power was unsuccessful;
cause, based on the indicator, a second current draw on the connection to the power sourcing equipment via the network connector to request power at a second power level associated with a second power classification; and
cause presentation that the request for power at the first power level was unsuccessful on a display of the network powered device.

16. The non-transitory machine-readable storage medium of claim 15 , further comprising instructions that, if executed by the processor, cause the processor to:
determine the second power classification to request via the network connector from the power sourcing equipment;
cause identification of the network powered device to be presented to the power sourcing equipment via the network connector as the network powered device requesting the power at the second power level associated with the second power classification;
determine whether the request for the power at the second power level is successful; and
cause presentation of the successfulness of the request for the power at the second power level.

17. The non-transitory machine-readable storage medium of claim 16 , wherein the second power classification is determined based on received input.

18. The non-transitory machine-readable storage medium of claim 15 , wherein the instructions, when executed, cause the processor to drive the display to present power level information associated with the second power level.

19. The non-transitory machine-readable storage medium of claim 15 , wherein:
the instructions to determine that the request for power was unsuccessful, when executed, cause the processor to perform the determination based on removal of power by the power sourcing equipment; and
the instructions to cause presentation that the request for power at the first power level was unsuccessful are caused to be executed in response to the removal of power by the power sourcing equipment.

Assignees

• Flynn Thomas J
• Brooks Robert C
• Durham Michael R
• Hewlett Packard Development Co Lp

Inventors

• Flynn Thomas J
• Brooks Robert C
• Durham Michael R

Classifications

• H02J3/005

  Electricity · mapped topic

• G06F1/30 Primary

  Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations (for resetting only G06F1/24) · CPC title

• H02J3/0075 Primary

  for providing alternative feeding paths between load and source according to economic or energy efficiency considerations, e.g. economic dispatch · CPC title

• H04L12/10 Primary

  Current supply arrangements · CPC title

• H02J3/00

  Circuit arrangements for AC mains or AC distribution networks · CPC title