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Aligning the upstream dmt symbols of multiple lines in a TDD DSL system

A symbol and symbol period technology, applied in transmission systems, modulated carrier systems, digital transmission systems, etc., can solve the problems of timing offset and crosstalk elimination.

Active Publication Date: 2015-02-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Timing offsets between various signals from customer premises may be detrimental to crosstalk cancellation

Method used

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  • Aligning the upstream dmt symbols of multiple lines in a TDD DSL system
  • Aligning the upstream dmt symbols of multiple lines in a TDD DSL system
  • Aligning the upstream dmt symbols of multiple lines in a TDD DSL system

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Embodiment Construction

[0032] 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 currently known or available techniques. 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. Modify within the complete scope of the object.

[0033] Depending on the standards supported, a DSL system can be denoted as an xDSL system, where 'x' can represent any DSL standard. For example, 'x' can represent 'A' in ADSL2 or ADSL2+ system, 'V' in VDSL or VDSL2 system, or 'F' in G.fast system. When the transceiver is located at the operator's end of the DSL system, including a central office (CO), a DSL access multiplexer (DSLAM), a cabi...

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Abstract

A method comprising transmitting a delay value to each of a plurality of digital subscriber line (DSL) transceivers, by a distribution point unit (DPU), and receiving a plurality of signals at substantially the same time, wherein each of the plurality of signals is from a different DSL transceiver in the plurality of DSL transceivers and transmitted at different times based on the delay value and a corresponding propagation delay.

Description

[0001] Cross References to Related Applications [0002] The present invention claims the filing of U.S. Provisional Patent Application No. 61 / 641424, filed May 2, 2012 by Shi Cao et al. First to apply for priority, and U.S. Provisional No. 61 / 772312, filed March 4, 2013, by Shi Cao et al., entitled "Method for Aligning Upstream DMT Symbols for Multiple Lines in a TDD DSL System-2" Priority to the earlier patent applications, the contents of both earlier applications are incorporated herein by reference as if reproduced in their entirety. [0003] About Sponsored by the Federal Government [0004] Statement of Research or Development [0005] Not applicable. [0006] Refer to Microfiche Addendum [0007] Not applicable. Background technique [0008] Digital Subscriber Line (DSL) technology is used to provide high-speed data over twisted-pair conductors. Current DSL standards may include Asymmetric DSL (ADSL, ADSL2 and ADSL2+), Very High Bit Rate DSL (VDSL and VDSL2), and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/32H04L25/08H04M3/34H04J3/06
CPCH04B3/32H04L27/2662H04J3/0682H04L5/1469H04L7/0041H04L25/14H04L27/2646H04M11/062H04L5/14
Inventor 石操阿米尔·H·法兹罗拉西刘建华
Owner HUAWEI TECH CO LTD
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