Use of priority information to intelligently allocate power for personal computing devices in a Power-over-Ethernet system

• US 7,890,776 B2
• Filed: 12/28/2006
• Issued: 02/15/2011
• Est. Priority Date: 06/28/2006
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Assouad, Simon, Diab, Wael William
• Primary Examiner(s): WANG, ALBERT C
• Application Number:
  US11/646,523
• Publication Number:
  US 20080005600A1
• Time in Patent Office: 1,510 Days
• Field of Search: 713/300, 307/29, 700/295
• US Class Current: 713/300
• CPC Class Codes: G06F 1/3209 Monitoring remote activity, e.g. over telephone lines or network connections

Abstract

A Power-over-Ethernet (PoE) communication system dynamically provides power and data communications over a communications link. In an enterprise environment made up of one or more personal computing devices (e.g., personal or laptop computers), a switch determines an allocated amount of power to be supplied to each device. The system includes a switch, a power supply, and one or more personal computing devices having a PoE control module. The PoE control module can be part of, for example, a Power Source Equipment/Powered Device (PSE/PD) system or a LAN-On-Motherboard/Powered Device (LOM/PD) system. A method of dynamically providing power to personal computing devices includes determining the power requirements of each device based on one or more factors, which can include, for example, battery charge status, power load, power mode, etc., of each device. Various algorithms can be used to decide priority in providing power to the devices.

Claims

1. In a Power-over-Ethernet (PoE) system, an automated method of dynamically supplying power to one or more personal computing devices, comprising:

(a) detecting one or more personal computing devices;

(b) determining power requirements over a Layer 2 type communication layer for each of the detected personal computing devices;

(c) receiving priority information for each of the detected personal computing devices over the Layer 2 type communication layer;

(d) determining an available amount of power in a power supply;

(e) determining a respective allocated amount of power for each of the detected personal computing devices based on the available amount of power and the power requirements of each respective personal computing device, wherein the priority information for each of the detected personal computing devices is used to determine the respective allocated amount of power for each of the detected personal computing devices when the available amount of power is less than the power requirements of all of the detected personal computing devices; and

(f) supplying the respective allocated amounts of power from the power supply to the respective personal computing devices.

2. The method of claim 1, wherein step (b) determines power requirements based on one or more of:

battery charge status of each personal computing device;

power load of each personal computing device;

power mode of each personal computing device;

load states of each personal computing device;

devices attached to each personal computing device;

backup needs of each personal computing device; and

the priority information for each personal computing device.

3. The method of claim 1, wherein step (b) includes receiving the power requirements directly from one or more of:

a network server; and

one or more of the personal computing devices.

4. The method of claim 1, wherein step (b) includes:

receiving power-related information from one or more of;

a network server; and

one or more of the personal computing devices; and

calculating the power requirements of each respective personal computing device from the received power-related information.

5. The method of claim 1, wherein step (b) includes calculating the power requirements, the calculation performed by one of:

a switch; and

one or more of the personal computing devices.

6. The method of claim 1, wherein steps (a)-(f) are performed in a Power Source Equipment/Powered Device (PSE/PD) system.

7. The method of claim 1, wherein steps (a)-(f) are performed in a LAN-On-Motherboard/Powered Device (LOM/PD) system.

8. The method of claim 1, wherein step (f) supplies the respective allocated amount of power to its respective personal computing device when a charge of the respective personal computing device is determined to be below a predetermined charge start level.

9. The method of claim 8, further comprising:

stopping the supply of power to the respective personal computing device when its charge is determined to reach a predetermined charge stop level.

10. The method of claim 9, wherein the predetermined charge stop level is equal to a full charge of the respective personal computing device.

11. The method of claim 1, further comprising:

determining a priority order of personal computing devices to receive their respective allocated amounts of power based upon the priority information for each of the detected personal computing devices when the available amount of power is less than the power requirements of all of the detected personal computing devices.

12. The method of claim 11, wherein the determining includes performing one or more priority algorithms, the priority algorithms performed by one or more of:

a switch; and

one or more personal computing devices.

13. The method of claim 11, wherein the priority order is determined on a “

first-come, first-served”

basis in which a first personal computing device determined to have its charge drop below the predetermined level is the first personal computing device to be supplied its allocated amount of power.

14. The method of claim 13, further comprising:

stopping the supply of power to the first personal computing device when its charge is determined to reach a predetermined charge stop level; and

supplying power to a second personal computing device that is next in priority order.

15. The method of claim 11, wherein the priority order is determined based on which personal computing device is determined to have a lowest charge, such that a first personal computing device determined to have the lowest charge is the first personal computing device to be supplied its allocated amount of power.

16. The method of claim 15, further comprising:

stopping the supply of power to the first personal computing device when its charge is determined to reach a predetermined charge stop level; and

supplying power to a second personal computing device that is next in priority order.

17. The method of claim 16, wherein the predetermined charge stop level is a level above a charge of the second personal computing device.

18. The method of claim 11, wherein the priority order is determined based on which personal computing device is determined to have a highest priority assignment, such that a first personal computing device determined to have the highest priority assignment is the first personal computing device to be supplied its allocated amount of power.

19. The method of claim 18, further comprising:

stopping the supply of power to the first personal computing device when its charge is determined to reach a predetermined charge stop level; and

supplying power to a second personal computing device that is next in priority order.

20. The method of claim 18, further comprising:

stopping the supply of power to the first personal computing device when its priority assignment is determined to be below that of a second personal computing device; and

supplying power to the second personal computing device.

21. The method of claim 18, further comprising:

reducing the supply of power to the first personal computing device when its priority assignment is determined to be below that of a second personal computing device; and

supplying power to the second personal computing device.

22. The method of claim 18, further comprising:

maintaining the supply of power to the first personal computing device when its priority assignment is determined to be below that of a second personal computing device; and

supplying power to the second personal computing device,

when there is enough power available to be supplied to both the first and second personal computing devices.

23. The method of claim 1, further comprising:

communicating the respective allocated amount of power to each respective personal computing device along with a request for confirmation that the allocated amount of power is acceptable; and

receiving confirmation from each personal computing device stating whether its allocated amount of power is acceptable.

24. The method of claim 1, further comprising:

repeating steps (a)-(f) at periodic intervals.

25. In a Power-over-Ethernet system, an automated system for dynamically supplying power to one or more personal computing devices, comprising:

one or more personal computing devices having a PoE control module;

a switch, connected to the one or more personal computing devices, configured to receive priority information for each of the one or more personal computing devices over a Layer 2 type communication layer; and

a power supply connected to the switch and the personal computing devices,

wherein the switch is further configured to determine an allocated amount of power for each personal computing device over the Layer 2 type communication layer based on an available amount of power at the power supply and power requirements of each personal computing device, to determmine the allocated amount of power for each of personal computing device based upon the priority information for each personal computing device when the available amount of power is less than the power requirements of all of the personal computing devices, and to supply the allocated amount of power to each of the personal computing devices via the PoE control module.

26. The system of claim 25, wherein the power requirements of each personal computing device is based on one or more of:

battery charge status of each personal computing device;

power load of each personal computing device;

power mode of each personal computing device;

load states of each personal computing device;

devices attached to each personal computing device;

backup needs of each personal computing device; and

the priority information for each personal computing device.

27. The system of claim 25, wherein the switch is configured to receive power requirements for a particular personal computing device from among the one or more personal computing devices.

28. The system of claim 25, wherein a particular personal computing device from among the one or more personal computing devices is configured to calculate the power requirements based on power need information located at the particular personal computing device.

29. The system of claim 25, wherein the switch is configured to calculate the power requirements for a particular personal computing device from among the one or more personal computing devices based on power need information provided to the switch for the particular personal computing device.

30. The system of claim 25, further comprising:

a network server having a database in which at least some of the power requirements for one or more of the personal computing devices are located.

31. The system of claim 30, wherein the switch is configured to request and to receive power requirements from the network server.

32. The system of claim 30, wherein the network server is configured to download the power requirements to the one or more personal communication devices.

33. The system of claim 25, wherein the PoE control module for one or more of the personal computing devices is part of a Power Source Equipment/Powered Device (PSE/PD) system.

34. The system of claim 25, wherein the PoE control module for one or more of the personal computing devices is part of a LAN-On-Motherboard/Powered Device (LOM/PD) system.

35. The system of claim 25, wherein one or more of the personal computing devices is a laptop computer.

36. The system of claim 25, wherein the switch is further configured to supply the allocated amount of power to a particular personal computing device from among the one or more personal computing devices when a charge of the particular personal computing device is determined to be below a predetermined charge start level.

37. The system of claim 36, wherein the switch is further configured to stop supplying the allocated amount of power to the particular personal computing device when its charge is determined to reach a predetermined charge stop level.

38. The system of claim 37, wherein the predetermined charge stop level is equal to a full charge of the particular personal computing device.

39. The system of claim 25, wherein the switch is configured to determine a priority order of personal computing devices to receive their respective allocated amounts of power based upon the priority information for each personal computing device when the available amount of power is less than the power requirements of all of the personal computing devices.

40. The system of claim 39, wherein the switch is further configured to determine the priority order is determined based on which personal computing device is determined to have a highest priority assignment, such that a first personal computing device from among the one or more personal computing devices determined to have the highest priority assignment is the first personal computing device to be supplied its allocated amount of power.

41. The system of claim 40, wherein the switch is further configured to stop the supply of power to the first personal computing device when its charge is determined to reach a predetermined charge stop level, allowing power to then be supplied to a second personal computing device from among the one or more personal computing devices that is next in priority order.

42. The system of claim 40, wherein the switch is further configured to stop the supply of power to the first personal computing device when its priority assignment is determined to be below that of a second personal computing device from among the one or more personal computing devices, allowing power to then be supplied to the second personal computing device.

43. The system of claim 40, wherein the switch is further configured to reduce the supply of power to the first personal computing device when its priority assignment is determined to be below that of a second personal computing device from among the one or more personal computing devices, allowing power to then be supplied to the second personal computing device.

44. The system of claim 40, wherein the supply of power to the first personal computing device remains unchanged when its priority assignment is determined to be below that of a second personal computing device from among the one or more personal computing devices, when there is enough power available to be supplied to both the first and the second personal computing devices.

45. The system of claim 39, wherein a particular personal computing device from among the one or more personal computing devices is configured to calculate its programmed priority setting based on a priority algorithm and to send its programmed priority setting as the priority information.

46. The system of claim 39, wherein the switch is further configured to determine the priority order based on a priority algorithm.

47. The system of claim 39, wherein the switch is further configured to determine the priority order is determined on a “

first-come, first-served”

basis in which a first personal computing device from among the one or more personal computing devices determined to have its charge drop below the predetermined level is the first personal computing device to be supplied its allocated amount of power.

48. The system of claim 47, wherein the switch is further configured to stop supply of power to the first personal computing device when its charge is determined to reach a predetermined charge stop level, allowing power to then be supplied to a second personal computing device from among the one or more personal computing devices that is next in priority order.

49. The system of claim 39, wherein the switch is further configured to determine the priority order based on which personal computing device is determined to have a lowest charge, such that a first personal computing device from among the one or more personal computing devices determined to have the lowest charge is the first personal computing device to be supplied its allocated amount of power.

50. The system of claim 49, wherein the switch is further configured to stop supply of power to the first personal computing device when its charge is determined to reach a predetermined charge stop level, allowing power to then be supplied to a second personal computing device that is next in priority order.

51. The system of claim 50, wherein the predetermined charge stop level is a level above a charge of the second personal computing device.

52. The system of claim 25, wherein the personal computing devices, the switch, and the power supply are located in a conference room.

53. The system of claim 25, wherein the switch is further configured to reassess and to resupply the allocated amount of power on a periodic basis.