Power over ethernet (POE) dynamic power supply system
A power sourcing equipment (PSE) device including a power over Ethernet (PoE) interface. A processor is coupled to the PoE interface. A memory is coupled to the processor and includes instruction that, when executed by the processor, cause the processor to perform a number of functions. The processor may supply power at a first power level to a PD that is coupled to the PoE interface. The processor may then determine an actual power consumption of the PD. The processor may then send a first Link Layer Discovery Protocol (LLDP) packet to the PD over the PoE interface that includes first proposed power level information that is based on the actual power consumption of the PD. Then processor may then supply power to the PD at a second power level that is different from the first power level.
1. A Power Sourcing Equipment (PSE) device, comprising:
a Power over Ethernet (PoE) interface;
a processing system coupled to the PoE interface; and
a memory system coupled to the processing system and including instruction that, when executed by the processing system, cause the processing system to:
supply power at a first power level to a Powered Device (PD) that is coupled to the PoE interface; and
receive a request packet from the PD through the PoE interface, wherein the request packet includes requested power level information that is associated with a requested power level that is different from the first power level and, in response, supply power to the PD at a second power level that is different than the first power level.
2. The PSE device of claim 1 , wherein the memory system includes instruction that, when executed by the processing system, cause the processing system to:
classify the PD, wherein the first power level is supplied to the PD based on the classification of the PD.
3. The PSE device of claim 1 , wherein the memory system includes instruction that, when executed by the processing system, cause the processing system to:
determine an actual power consumption of the PD;
send a proposal packet to the PD over the PoE interface that includes proposed power level information that is based on the actual power consumption of the PD; and
supply power to the PD at the first power level that is associated with the proposed power level information.
4. The PSE device of claim 1 , wherein the request packet includes a power state of the PD, and wherein the power is supplied to the PD at the second power level based on the power state of the PD.
5. The PSE device of claim 1 , wherein the request packet includes maximum power information for the PD, and wherein the power is supplied to the PD at the second power level based on the maximum power information for the PD.
6. The PSE device of claim 1 , wherein the second power level is the requested power level.
7. The PSE device of claim 1 , wherein the memory system includes instruction that, when executed by the processing system, cause the processing system to:
send a proposal packet to the PD over the PoE interface in response to receiving the request packet, wherein the proposal packet includes proposed power level information that includes the second power level that is between the requested power level and the first power level; and
supply power to the PD at the second power level.
8. A power over Ethernet (PoE) system, comprising:
a plurality of Powered Devices (PDs); and
a Power Sourcing Equipment (PSE) device coupled to each of the plurality of PDs, wherein the PSE device is configured to:
supply power to each of the plurality of PDs at at least one first power level; and
receive a request packet from the PD through the PoE interface, wherein the request packet includes requested power level information that is associated with a requested power level that is different from the first power level and,
in response, supply power to the PD at a second power level that is different than the first power level.
9. The PoE system of claim 8 , wherein the PSE device is configured to:
classify each of the plurality of PDs, wherein the at least one first power level supplied to each of the plurality of PDs is based on the classification of that PD.
10. The PoE system of claim 8 , wherein the PSE device is configured to:
determine an actual power consumption of each of the plurality of PDs;
send a proposal packet to each of the plurality of PDs that includes proposed power level information that is based on the actual power consumption of that PD;
supply power to each of the plurality of PDs at the at least one first power level that is associated with the proposed power level information.
11. The PoE system of claim 8 , wherein the request packet includes a power state of the first PD, and wherein the power is supplied to the first PD at the second power level based on the power state of the first PD.
12. The PoE system of claim 8 , wherein the request packet includes maximum power information for the first PD, and wherein the power is supplied to the first PD at the second power level based on the maximum power information for the first PD.
13. The PoE system of claim 8 , wherein the second power level is the requested power level.
14. The PoE system of claim 8 , wherein the PSE device is configured to:
send a proposal packet to the first PD in response to receiving the request packet, wherein the proposal packet includes proposed power level information that includes the second power level that is between the requested power level and the first power level; and
supply power to the first PD at the second power level.
15. A method for providing power, comprising:
supplying, by a power sourcing equipment (PSE) device to a powered device (PD), power at a first power level;
receiving, by the PSE device from the PD, a request packet that includes requested power level information that is associated with a requested power level that is different from the first power level; and
supplying, by the PSE device to the PD in response to receiving the request packet, power at a second power level that is different than the first power level.
16. The method of claim 15 , further comprising:
classifying, the PD by the PSE device, wherein the first power level is supplied to the PD based on the classification of the PD.
17. The method of claim 15 , further comprising:
determining, by the PSE device, an actual power consumption of the PD;
sending, by the PSE device to the PD, a proposal packet that includes proposed power level information that is based on the actual power consumption of the PD; and
supplying, by the PSE device to the PD, power at the first power level that is associated with the proposed power level information.
18. The method of claim 15 , wherein the request packet includes a power state of the PD, and wherein the power is supplied to the PD at the second power level based on the power state of the PD.
19. The method of claim 15 , wherein the second power level is the requested power level.
20. The method of claim 19 , further comprising:
sending, by the PSE device to the PD, a proposal packet in response to receiving the request packet, wherein the proposal packet includes proposed power level information that includes the second power level that is between the requested power level and the first power level; and
supplying, by the PSE device to the PD, power at the second power level.