Multiple channel system for a twisted pair telephone wire local loop system

• US 8,396,077 B2
• Filed: 12/23/2009
• Issued: 03/12/2013
• Est. Priority Date: 02/16/1999
• Status: Expired due to Fees

• 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, Folds, Edward R., Starr, Thomas J. J.
• Primary Examiner(s): TRAN, PHUC H
• Application Number:
  US12/646,544
• Publication Number:
  US 20100098097A1
• Time in Patent Office: 1,175 Days
• Field of Search: 370/348, 370/345, 370/468, 379/93.01
• US Class Current: 370/468
• 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

The system (50) has a subscriber digital filter system (54) connected to the twisted pair telephone wire (56). A subscriber controller (52) sends control signals to the subscriber digital filter system (54). An office digital filter system (58) is connected to the twisted pair telephone wire (56). An office controller (60) sends control signals to the office digital filter system (58).

Claims

1. A telephone communication system, comprising:

a first controller at a switching office to receive a bandwidth allocation request and to identify an available frequency band, wherein the first controller is to use one or more digital filters to implement a frequency translation to move a signal to the available frequency band; and

a first transceiver at the switching office to send and receive via multiple independent channels, wherein the first transceiver is to transmit data representative of the frequency translation to a subscriber gateway.

2. A telephone communication system as defined in claim 1, wherein the switching office is a central office.

3. A telephone communication system as defined in claim 1, wherein the first transceiver is to communicate via a twisted pair telephone wire, and wherein the first transceiver is to transmit the data representative of the frequency translation to the subscriber gateway over the twisted pair telephone wire.

4. A telephone communication system 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.

5. A telephone communication system as defined in claim 1, wherein the first controller is to identify the available frequency band by selecting an unused frequency band.

6. A telephone communication system as defined in claim 5, wherein the first transceiver is to initiate a link quality analysis when the unused frequency band has sufficient bandwidth for the bandwidth allocation request.

7. A telephone communication system as defined in claim 6, wherein the first controller is to calculate the frequency translation in response to the link quality analysis generating a result greater than a threshold.

8. A telephone communication system, comprising:

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

one or more digital filters at the subscriber gateway to implement the frequency translation, the frequency translation to move a signal to an available frequency band; and

a second controller at the subscriber gateway to operate the one or more digital filters.

9. A telephone communication system as defined in claim 8, wherein the one or more digital filters are coupled to a twisted pair telephone wire.

10. A telephone communication system as defined in claim 8, wherein the first transceiver is to enable a link quality check to test one or more bandwidths.

11. A telephone communication system as defined in claim 8, wherein the one or more digital filters are coupled to a splitter and the splitter is to separate a low frequency analog voice signal from a high frequency signal.

12. A telephone communication system as defined in claim 8, further comprising a control channel in communication with the second controller to convey control information between the second controller and the first controller.

13. A telephone communication system as defined in claim 8, wherein the first transceiver is to transmit a plurality of frequency division multiplexed signals.

14. A telephone communication system as defined in claim 8, wherein the first transceiver is coupled to a plain old telephone service.

15. A method of operating a telephone communication system, 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 one or more digital filters 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 one or more digital filters; and

summing outputs of the digital filters using a summer.

16. A method as defined in claim 15, wherein the one or more digital filters are coupled to a twisted pair telephone wire.

17. A method as defined in claim 15, wherein the second controller is to up-convert and down-convert signals in the frequency domain.

18. A method as defined in claim 15, further comprising performing a link quality analysis to test one or more bandwidths.

19. A method as defined in claim 15, further comprising transmitting a plurality of frequency division multiplexed signals via the first transceiver.

20. A multiple telephone communication system, comprising:

a subscriber gateway system having a first transceiver coupled to a twisted pair telephone wire, the first transceiver to send and receive via multiple independent channels;

a second transceiver at a central office coupled to the twisted pair telephone wire, the second transceiver to send and receive via the multiple independent channels, wherein the second transceiver is communicatively coupled with the first transceiver; and

a plurality of digital filters, operatively coupled to the first and second transceivers, to implement a frequency translation scheme, wherein the digital filters are to operate according to the frequency translation scheme to move a signal to an available frequency band associated with the multiple independent channels.