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Method and apparatus for crosstalk testing of multi-user communication line

A communication line and test method technology, which is applied in the field of network communication, can solve the problems of limited optimization degree, large amount of calculation, and inability to provide quantitative crosstalk test between multiple lines, so as to improve the overall performance and stabilize the transmission rate.

Active Publication Date: 2006-11-15
HUAWEI TECH CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

[0006] The detection methods of the above crosstalk information have the disadvantages of complex implementation and large amount of calculation
Moreover, the quantitative test of crosstalk between multiple lines cannot be provided, but the performance of DSL lines or systems is optimized only from certain statistical characteristics of crosstalk, which limits the degree of optimization

Method used

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  • Method and apparatus for crosstalk testing of multi-user communication line
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  • Method and apparatus for crosstalk testing of multi-user communication line

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Embodiment Construction

[0061] The main purpose of the present invention is to detect the crosstalk source and quantitatively test the crosstalk value. Only when DSL equipment can test crosstalk in real time can it be possible to respond in real time to avoid crosstalk between multi-user DSL lines and provide crosstalk data for system-level optimization of DSLAM equipment.

[0062] In practical applications, XDSL subscriber lines can generate crosstalk to XDSL subscriber lines in the same bundle of cables, and at the same time, receive crosstalk from other XDSL subscriber lines. The core of the method of the present invention is to use the code division method to detect mutual interference (that is, crosstalk) between XDSL multi-line pairs, and can accurately locate the crosstalk source and the quantized value of the crosstalk.

[0063] In order to further understand the present invention, the method described in the present invention will be described in detail below in conjunction with the accompanyi...

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Abstract

The invention relates to a multi user communication wire disturbing testing method and device that carries preset orthotropic spread spectrum to the send end on each line, taking cross talk testing to xDSL line according to the received signal vector at receiving end to effectively recognize the cross talk resource, cross talk extent and phase. The invention could also realize the measuring for cross talk value between the lines. The invention supplies basic data for dynamic frequency spectrum managing and DSLAM system optimizing.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a multi-user communication line crosstalk testing method and equipment. Background technique [0002] ADSL (Asymmetric Digital Subscriber Line) technology has been developed for many years, and the corresponding technology has been constantly updated, and has developed from the first generation of ADSL to the current second generation of ADSL2, ADSL2+ and updated VDSL2, and each technology The frequency band used is gradually increasing, and the corresponding bandwidth is also gradually increasing. Among them, ADSL and ADSL2 downlink use spectrum below 1.1MHz to provide a maximum downlink rate of 8Mbps, ADSL2+ expands the downlink bandwidth to 2.2MHz, which can provide a maximum downlink rate of 24Mbps, and the downlink bandwidth of VDSL2 can even use a spectrum up to 30MHz , which can provide a maximum uplink and downlink symmetrical rate of 100Mbps. [0003] How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04B3/32H04J13/00H04J13/18H04M3/00
CPCH04L5/0007H04L5/0016H04L27/2613H04M3/304H04M3/34H04B3/487
Inventor 石清泉
Owner HUAWEI TECH CO LTD
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