METHOD OF TAGGING SIGNALS USED FOR LEAKAGE DETECTION AND/OR MEASUREMENT IN xDSL DATA TRANSMISSION NETWORKS AND APPARATUS FOR DETECTION AND/OR MEASUREMENT OF LEAKAGE SOURCES IN xDSL DATA TRANSMISSION NETWORKS

• US 20120275503A1
• Filed: 04/04/2012
• Published: 11/01/2012
• Est. Priority Date: 04/30/2011
• Status: Abandoned Application

• Current Assignee: Kabelkom Sp. Z O.O.
• Original Assignee: Kabelkom Sp. Z O.O.
• Inventors: SALA, Wojciech, SZÓSTKA, Jaroslaw
• Application Number:
  US13/438,986
• Publication Number:
  US 20120275503A1
• Time in Patent Office: Days
• US Class Current: 375/224
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data

Abstract

A method of tagging signals for leakage detection and measurement in xDSL data transmission networks which uses additional signals carrying the tagging information and transmitted in these networks. A narrowband tagging signal or signals are placed in unused parts of an xDSL signal frequency spectrum or in its proximity.

Claims

1. A method of tagging signals used for leakage detection and/or leakage measurement in data transmission networks;

the data transmission networks comprising a digital subscriber loop xDSL carrying an xDSL signal frequency spectrum;

the method comprising placing a narrowband tagging signal or narrowband tagging signals in an unused part or unused parts of the xDSL signal frequency spectrum or in a proximity of the xDSL signal frequency spectrum.

2. The method of claim 1, wherein said narrowband tagging signal or narrowband tagging signals are extraneous and additional to signals normally carried by the data transmission networks;

and said narrowband tagging signal or narrowband tagging signals carry tagging information.

3. The method of claim 1, wherein said narrowband tagging signal or narrowband tagging signals have a bandwidth of from a few kHz up to several kHz.

4. An apparatus for leakage detection and/or leakage measurement in data transmission networks;

the data transmission networks comprising a digital subscriber loop xDSL carrying an xDSL signal frequency spectrum tagged using the method of claim 1;

the apparatus comprising;

a narrowband filter or filters for tagging signal extraction having a filter output;

a microprocessor having a microprocessor input;

an antenna switch;

an amplifier;

a variable frequency local oscillator;

a screen; and

a keyboard;

wherein

said narrowband filters have a bandwidth of from a few up to several kHz;

said filter output is connected to said microprocessor input;

said microprocessor is connected to said antenna switch, said amplifier, the said variable frequency local oscillator, said screen, and said keyboard (K); and

said microprocessor is programmed for sampling and quantizing of an input signal and for the detection of spectrum components carrying tagging information.

5. The apparatus of claim 4, wherein said apparatus uses frequency conversion reception of signals.

6. The apparatus of claim 4, wherein said microprocessor uses fast Fourier transform for leakage detection and/or leakage measurement.

7. The apparatus of claim 4, wherein said microprocessor uses discrete cosine transform for leakage detection and/or leakage measurement.

8. An apparatus for leakage detection and/or leakage measurement in data transmission networks, which uses the method of claim 1 for tagging signals.

9. An apparatus for leakage detection and/or leakage measurement in data transmission networks using the method of claim 1;

the apparatus comprising a narrowband filter or filters and a microprocessor;

wherein said narrowband filter or filters attenuate signals other than said narrowband tagging signal or narrowband tagging signals; and

said microprocessor carries out sampling and quantizing of an input signal and detection of spectrum components carrying tagging information.