Method and apparatus for increasing the number of the powered devices supported by the PoE system

• US 9,264,239 B2
• Filed: 02/25/2009
• Issued: 02/16/2016
• Est. Priority Date: 02/25/2009
• Status: Expired due to Fees

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Liu, Jun
• Primary Examiner(s): GRANT, ROBERT J
• Application Number:
  US13/142,821
• Publication Number:
  US 20110298428A1
• Time in Patent Office: 2,547 Days
• Field of Search: 320/114, 320/149
• US Class Current: 1/1
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
• CPC Class Codes: H04L 12/10 Current supply arrangements

Abstract

In order to increase the number of the powered devices that can be supported by the Ethernet power supply system, the present invention proposed to equip the powered device with an electrical energy storage device, namely shift the power timely shift the power supplying capability of the power sourcing equipment. The power sourcing equipment charges the electrical energy storage device, and then the powered device is supplied by the electrical energy storage device under usual situations. Thus the number of the powered devices that can be supported by the Ethernet power supply system is increased without increasing the supplying capability of the electrical quantity of the power sourcing equipment. Using the solution in the present invention, the capacity of the powered devices in the POE system is increased without having to change the hardware of the power sourcing equipment, and without having to change the wiring.

Claims

1. A method for use in a power sourcing equipment to power a powered device, the method comprising the steps of:

receiving, at the power sourcing equipment, charging related information from the powered device, wherein the charging related information comprises a quantity of power needed, a power consumption mode of the powered device, and charging modes of the powered device that comprise an emergency charging mode for a remaining electrical quantity of less than ten percent and a normal charging mode otherwise;

determining, at the power sourcing equipment, whether a predetermined charging condition is satisfied according to the received charging related information; and

charging continuously, via the power sourcing equipment, an electrical energy storage device of the powered device, or charging periodically, via the power sourcing equipment, the electrical energy storage device according to a time slot and to the received charging related information when the predetermined charging condition is satisfied, the electrical energy storage device being used to provide the powered device with a working power supply.

2. The method according to claim 1, wherein the step of charging continuously, via the power sourcing equipment, the electrical energy storage device further comprises the step of:

providing the powered device with a working power supply.

3. The method according to claim 1, wherein the step of charging continuously, via the power sourcing equipment, the electrical energy storage device further comprises the step of:

charging continuously, via the power sourcing equipment, the electrical energy storage device of the powered device over a physical medium of transmission, or charging periodically, via the power sourcing equipment, the electrical energy storage device over the physical medium of transmission according to the time slot and to the received charging related information when the predetermined charging condition is satisfied.

4. The method according to claim 1, wherein the received charging related information further comprises a charging request message for the requested charging.

5. The method according to claim 1, wherein the received charging related information comprises indication information for the electrical quantity of the electrical energy storage device, the predetermined charging condition further comprising the steps of:

comparing, at the power sourcing equipment, the indication information for the electrical quantity with a predetermined threshold; and

determining, at the power sourcing equipment, to charge the electrical energy storage device according to the results of the comparison.

6. The method according to claim 1, wherein the power consumption mode comprises a large power consumption mode or a normal power consumption mode.

7. The method according to claim 1, wherein before the step of determining whether a predetermined charging condition is satisfied, the method further comprises the step of:

sending, at the power sourcing equipment, an inquiry message to the powered device, the inquiry message being used to request the charging related information.

14. The method according to claim 1, wherein the electrical energy storage device of the powered device is separated from the powered device.

15. The method according to claim 1, further comprising the step of stopping, at the power sourcing equipment, the periodic charging of the powered device after detecting that a time for the periodic charging has expired.

8. A method for use in a powered device to assist power sourcing equipment to supply power to the powered device, wherein the powered device comprises an electrical energy storage device, the method comprising the step of:

sending, at the powered device, charging related information to the power sourcing equipment, wherein the charging related information comprises a quantity of power needed, a power consumption mode of the powered device, and charging modes of the powered device that comprise an emergency charging mode for a remaining electrical quantity of less than ten percent and a normal charging mode otherwise; and

receiving, at the powered device, a continuous charging of the electrical energy storage device from the power sourcing equipment, or a periodic charging of the electrical energy storage device according to a time slot and to the received charging related information when a predetermined charging condition is satisfied.

9. The method according to claim 8, wherein the method further comprises the step of:

receiving, at the powered device, a working power supply via the electrical energy storage device.

10. The method according to claim 8, wherein the step of sending, at the powered device, charging related information further comprises the step of indicating, at the powered device, information for an electrical quantity of the electrical energy storage device.

11. The method according to claim 8, wherein the charging related information further comprises a charging request message;

the method further comprises the following steps before the step of sending;

detecting, at the powered device, electrical quantity information of the electrical energy storage device;

comparing, at the powered device, the electrical quantity information with a pre-determined threshold; and

generating, at the powered device, the charging request message when the results of the comparison determine that it is necessary to charge the electrical energy storage device.

12. A power sourcing apparatus in a power sourcing equipment to power a powered device, wherein the powered device comprises:

a determining means configured to determine whether a predetermined charging condition is satisfied according to received charging related information from the powered device, wherein the received charging related information comprises a quantity of power needed, a power consumption mode of the powered device, and charging modes of the powered device that comprise an emergency charging mode for a remaining electrical quantity of less than ten percent and a normal charging mode otherwise; and

a power supplying means configured to charge continuously an electrical energy storage device of the powered device, or charge periodically the electrical energy storage device according to a time slot and to the received charging related information when the predetermined charging condition is satisfied, the electrical energy storage device being used to provide the powered device with a working power supply.

13. An aiding apparatus in a powered device configured to aid a power sourcing equipment in powering the powered device, wherein the powered device comprises an electrical energy storage device, the aiding apparatus being configured to

send a charging related information to the power sourcing equipment, wherein the charging related information comprises a quantity of power needed, a power consumption mode of the powered device, and charging modes of the powered device that comprises an emergency charging mode for a remaining electrical quantity of less than ten percent and a normal charging mode otherwise;

and

receive a continuous charging of the electrical energy storage device from the power sourcing equipment, or a periodic charging of the electrical energy storage device according to a time slot and to the charging related information when a predetermined charging condition is satisfied.