Method and System for Remote Power Feeding of a DSL Communication Device

• US 20090103429A1
• Filed: 10/21/2008
• Published: 04/23/2009
• Est. Priority Date: 10/22/2007
• Status: Abandoned Application

• Current Assignee: Koninklijke KPN NV
• Original Assignee: Koninklijke KPN NV
• Inventors: Herrera Van Der Nood, Jose Manuel
• Application Number:
  US12/255,046
• Publication Number:
  US 20090103429A1
• Time in Patent Office: Days
• US Class Current: 370/216
• CPC Class Codes: H04L 12/10 Current supply arrangements
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data

Abstract

The invention relates to a method and system of remote power feeding of a DSL communication device. The system for performing the method comprises a central DSL system connectable to a plurality of DSL communication devices via a plurality of associated subscriber lines. A subscriber line provides a plurality of communication channels for signal transmission between the central DSL system and the DSL communication device. The method involves receiving a power failure indication signal from the at least one DSL communication device. Following the transmission of the power failure indication signal, one or more communication channels are selected from the plurality of communication channels for signal transmission over the subscriber line. Then, power is fed to the at least one DSL communication device in combination with signal transmission over said selected one or more communication channels of the subscriber line.

Claims

1. A method of remote power feeding of a DSL communication device in a system comprising a central DSL system connectable to a plurality of DSL communication devices via a plurality of associated subscriber lines, a subscriber line providing a plurality of communication channels for signal transmission between the central DSL system and the DSL communication device, the method comprising the steps of:

transmitting a power failure indication signal from said at least one DSL communication device;

selecting, following the transmission by the DSL communication device of said power failure indication signal, one or more communication channels from said plurality of communication channels for signal transmission over the subscriber line; and

feeding power to said at least one DSL communication device in combination with signal exchange over said selected one or more communication channels of the subscriber line.

2. The method according to claim 1, further comprising the steps of:

receiving said power failure indication signal from said at least one DSL communication device at said central DSL system;

in response to receiving said power failure indication signal, feeding power from said central DSL system over further subscriber lines to further associated DSL communication devices without having received a power failure indication signal from these further DSL communication devices.

3. The method according to claim 1, further comprising the steps of:

receiving said power failure indication signal from said at least one DSL communication device at said central DSL system;

in response to receiving said power failure indication signal, disconnecting further subscriber lines from said central DSL system corresponding to further associated DSL communication devices without having received a power failure indication signal from these further DSL communication devices.

4. The method according to claim 2, wherein said step of feeding power over said further subscriber lines of disconnecting said further subscriber lines is performed if a number of power failure indication signals is above a predetermined threshold.

5. The method according to claim 1, wherein a power failure information message is transmitted from said central DSL system over said subscriber line to said at least one DSL communication device.

6. The method according to claim 1, wherein said signal transmission comprises data transmission.

7. The method according to claim 1, wherein said selected channels include carrier waves with a frequency in the range of 0-25 kHz.

12. The system according to claim 7, wherein said central DSL system is adapted for transmitting a power failure information message over said subscriber line to said at least one DSL communication device.

13. The system according to claim 7, wherein said system is arranged for data transmission using carrier waves for said communication channels in the range of 0-25 kHz.

8. A system comprising a central DSL system and a plurality of DSL communication devices connectable to said central DSL system via a plurality of associated subscriber lines, wherein at least one of said DSL communication devices is adapted for transmitting a power failure indication signal and wherein said central DSL system is adapted for feeding power to said at least one DSL communication device in combination with signal exchange over one or more communication channels of the subscriber line and wherein said system is arranged for selecting said one or more communication channels following the transmission of said power failure indication signal.

9. The system according to claim 8, wherein said central DSL system is arranged for receiving said power failure indication signal from said at least one DSL communication device and said central DSL system, in response to receiving said power failure indication signal, is arranged for feeding power from said central DSL system over further subscriber lines to further associated DSL communication devices without having received a power failure indication signal from the further DSL communication devices.

10. The system according to claim 8, wherein said central DSL system is arranged for receiving said power failure indication signal from said at least one DSL communication device and said central DSL system, in response to receiving said power failure indication signal, is arranged for disconnecting further subscriber lines from said central DSL system corresponding to further associated DSL communication devices without having received a power failure indication signal from these further DSL communication devices.

11. The system according to claim 9 or 10, wherein said central DSL system is adapted to feed power over said further subscriber lines or to disconnect said further subscriber lines if a number of received power failure indication signals is above a predetermined threshold.

14. A central DSL system adapted to be connected to a plurality of DSL communication devices via a plurality of associated subscriber lines, wherein at least one of said DSL communication devices is adapted for transmitting a power failure indication signal, wherein said central DSL system comprises:

a receiver arranged to receive a power failure indication signal from at least one of said DSL communication devices;

a communication channel selector adapted to select one or more communication channels following the receipt of said power failure indication signal; and

a power feeder arranged to feed power to said at least one DSL communication device from which said power failure indication signal was received in combination with signal exchange over one or more selected communication channels of the subscriber line.

15. A DSL communication device adapted to be connected to a central DSL system via a subscriber line for signal exchange over one or more communication channels, wherein said DSL communication device comprises:

a power supply monitor for monitoring supply of commercial power for said DSL communication device and to indicate power failure

a power failure indication signal transmitter adapted to transmit a power failure indication signal in response to a power failure

a communication channel selector adapted to select one or more communication channels following the transmission of said power failure indication signal for signal exchange between said central DSL system and said DSL communication device;

a receiver adapted to receive power from said central DSL system in combination with signal exchange over one or more selected communication channels of the subscriber line.

16. The DSL communication device of claim 15, wherein said device further comprises a temporary power source for providing power immediately after power failure.