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Optimal downstream power back-off for digital subscriber lines

A technology of digital subscriber line and customer premises equipment, applied in another embodiment, in another embodiment field, can solve problems such as suppressing transmission signals and affecting signals

Active Publication Date: 2014-07-23
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the far-end crosstalk (FEXT) introduced at this point can seriously affect the signal in the switchboard deployment line, sometimes completely suppressing the desired transmission signal

Method used

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  • Optimal downstream power back-off for digital subscriber lines
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Examples

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Embodiment Construction

[0022] It should be understood at the outset that although an illustrative implementation of one or more embodiments is provided below, the disclosed systems and / or methods may be implemented using any number of techniques, whether currently known or in existence . The invention should in no way be limited to the illustrative implementations, drawings, and techniques illustrated below, including the exemplary designs and implementations illustrated and described herein, but may be limited within the scope of the appended claims and their equivalents. Modified in full.

[0023] In order to reduce the crosstalk of downlink transmission in the DSL system and solve potential problems, for example, the "far-near" problem, a spectrum management technology called downstream power back-off (DPBO) can be applied. The DPBO technology can reduce downlink transmission power spectral density (power spectrum density, PSD) (sometimes also referred to as power spectral density) on a short lo...

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Abstract

A method comprising determining a plurality of power spectrum density (PSD) profiles for a plurality of cabinet-deployed digital subscriber lines (DSLs) comprising jointly and iteratively determining a plurality of cutoff frequencies based on crosstalk coupling parameters among the DSLs, wherein the cutoff frequencies and PSD profiles are in one to one correspondence, and wherein each profile comprises a reduced PSD portion below the cutoff frequency of the profile and a maximum PSD portion above the cutoff frequency.

Description

[0001] Cross References to Related Applications [0002] The present invention claims the prior application priority of U.S. Provisional Patent Application No. 61 / 479,719, filed by Weidong on April 27, 2011, entitled "Optimal Downlink Power Shutdown of Digital Subscriber Line", and the above-mentioned prior The content of the application is incorporated herein by reference in its entirety. [0003] Statement Regarding Research or Development Sponsored by the Federal Government [0004] Not applicable. [0005] Refer to Microfiche Addendum [0006] Not applicable. Background technique [0007] Digital subscriber line (digital subscriber line, DSL) technology can provide large bandwidth for digital communication of existing subscriber lines. When transmitting data on subscriber lines, crosstalk interference may arise between signals transmitted on adjacent twisted-pair telephone lines, for example, within the same bundle or adjacent bundles of wires. Crosstalk may limit the...

Claims

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Application Information

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IPC IPC(8): H04B3/32H04B3/46H04M11/06
CPCH04B3/32H04B3/487H04M11/062
Inventor 卫东
Owner HUAWEI TECH CO LTD
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