MULTIPLE CHANNEL SYSTEM FOR A TWISTED PAIR TELEPHONE WIRE LOCAL LOOP SYSTEM

• US 20130155893A1
• Filed: 02/08/2013
• Published: 06/20/2013
• Est. Priority Date: 02/16/1999
• Status: Active Grant

• Current Assignee: Ameritech Corp. (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Skeba, Phillip George, Halling, Dale Brian, Ledbetter, Nelson Leon, Starr, Thomas J.J., Folds, Edward R.
• Granted Patent: US 8,755,406 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04J 1/12 Arrangements for reducing cross-talk between channels in line transmission systems H04B3/32; in cables or lines H04B3/26 - H04B3/30
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 65/40 Support for services or applications

Abstract

Example multiple channel systems for a twisted pair telephone wire local loop system are disclosed. An example method includes implementing, via a digital filter at a subscriber gateway, a frequency translation received from a first controller of a switching office in response to a bandwidth allocation request, wherein the frequency translation moves a signal to an available frequency band identified by the first controller of the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via a first transceiver configured to send and receive via multiple independent channel located at the subscriber gateway.

Claims

1. A method, comprising:

implementing, via a digital filter at a subscriber gateway, a frequency translation received from a first controller of a switching office in response to a bandwidth allocation request, wherein the frequency translation moves a signal to an available frequency band identified by the first controller of the switching office;

operating a second controller at the subscriber gateway to control the digital filter; and

transmitting a plurality of frequency division multiplexed signals via a first transceiver configured to send and receive via multiple independent channel located at the subscriber gateway.

2. A method as defined in claim 1, further comprising summing outputs of the digital filter using a summer.

3. A method as defined in claim 1, wherein the digital filter is coupled to a twisted pair telephone wire.

4. A method as defined in claim 1, wherein the second controller is to up-convert and down-convert signals in the frequency domain.

5. A method as defined in claim 1, further comprising performing a link quality analysis to test bandwidth.

6. A method as defined in claim 1, wherein the first transceiver is to communicate via a digital subscriber line access multiplexer to provide access to a data network.

7. A method as defined in claim 1, wherein the available frequency band is identified by selecting an unused frequency band.

8. A tangible machine readable storage medium comprising instructions that, when executed, cause a machine to perform operations comprising:

in response to receiving, at a first transceiver to send and receive via multiple independent channels located at a subscriber gateway, a frequency translation from a first controller at a switching office in response to a bandwidth allocation request;

implementing the frequency translation via a digital filter at the subscriber gateway, wherein the frequency translation moves a signal to an available frequency band identified by the first controller at the switching office;

operating a second controller at the subscriber gateway to control the digital filter; and

transmitting a plurality of frequency division multiplexed signals via the first transceiver.

9. A storage medium as defined in claim 8, wherein the operations further comprise summing outputs of the digital filter using a summer.

10. A storage medium as defined in claim 8, wherein the digital filter is coupled to a twisted pair telephone wire.

11. A storage medium as defined in claim 8, wherein the second controller is to up-convert and down-convert signals in the frequency domain.

12. A storage medium as defined in claim 8, wherein the operations further comprise performing a link quality analysis to test bandwidth.

13. A storage medium as defined in claim 8, wherein the operations further comprise communicating via a digital subscriber line access multiplexer to provide access to a data network.

14. A storage medium as defined in claim 8, wherein the available frequency band is identified by selecting an unused frequency band.

15. An apparatus, comprising:

a memory comprising machine readable instructions;

a processor to execute the machine readable instructions to perform operations comprising;

receiving, at a first transceiver to send and receive via multiple independent channels located at a subscriber gateway, a frequency translation from a first controller at a switching office in response to a bandwidth allocation request;

implementing the frequency translation via a digital filter at the subscriber gateway, wherein the frequency translation moves a signal to an available frequency band identified by the first controller at the switching office;

operating a second controller at the subscriber gateway to control the digital filter; and

transmitting a plurality of frequency division multiplexed signals via the first transceiver.

16. An apparatus as defined in claim 15, wherein the operations further comprise summing outputs of the digital filter using a summer.

17. An apparatus as defined in claim 15, wherein the digital filter is coupled to a twisted pair telephone wire.

18. An apparatus as defined in claim 15, wherein the second controller is to up-convert and down-convert signals in the frequency domain.

19. An apparatus as defined in claim 15, wherein the operations further comprise performing a link quality analysis to test bandwidth.

20. An apparatus as defined in claim 15, wherein the operations further comprise communicating via a digital subscriber line access multiplexer to provide access to a data network.