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Collinear transmission method and device

A transmission method and collinear technology, applied in the direction of line transmission components, line fault/interference reduction, baseband system components, etc., can solve problems such as adjacent line crosstalk

Active Publication Date: 2019-05-28
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a collinear transmission method and device to at least solve the problem of crosstalk between adjacent lines in the related art

Method used

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  • Collinear transmission method and device
  • Collinear transmission method and device

Examples

Experimental program
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Embodiment 1

[0048] Such as figure 2 As shown, this embodiment is aimed at the scenario where VDSL / VDSL2 and G.fast coexist, wherein VDSL / VDSL2 adopts the FDD mode, and its downlink spectrum is as follows image 3 As shown, the spectrum in the uplink direction is shown as Figure 4 shown. G.fast spectrum such as Figure 5 shown. The specific steps of the solution provided in this embodiment are as follows:

[0049] 1. Obtain the transmission mode of the adjacent line pair of the G.fast line, the working frequency band overlapping with the G.fast own line pair, the overlapping frequency band in the downlink direction and the overlapping frequency band in the uplink direction, and determine the opening in order to avoid near-end crosstalk (NEXT). Which overlapping frequency bands are notched; and determine the PSD (power spectral density) of adjacent lines at the deployment point in the unnotched working frequency band.

[0050] (1) Since VDSL / VDSL2 (collectively referred to as VD) ado...

Embodiment 2

[0086] Such as figure 2 As shown, this embodiment is aimed at the scenario where VDSL / VDSL2 and G.fast coexist, wherein VDSL / VDSL2 adopts the FDD mode, and its downlink spectrum is as follows image 3 As shown, the spectrum in the uplink direction is shown as Figure 4 shown. G.fast spectrum such as Figure 5 shown. The specific steps of the solution provided in this embodiment are as follows:

[0087] 1. Obtain the transmission mode of the adjacent line pair of the G.fast line, the working frequency band overlapping with the G.fast line pair, the overlapping frequency band in the downlink direction and the overlapping frequency band in the uplink direction, and determine Notching in order to avoid near-end crosstalk (NEXT) Which overlapping frequency bands to drop; and determine the PSD (power spectral density) of adjacent lines at the deployment point in the working frequency band that has not been notched.

[0088] (1) Since VDSL / VDSL2 (collectively referred to as VD)...

Embodiment 3

[0125] Such as figure 2 As shown, this embodiment is aimed at the scenario where VDSL / VDSL2 and G.fast coexist, wherein VDSL / VDSL2 adopts the FDD mode, and its downlink spectrum is as follows image 3 As shown, the spectrum in the uplink direction is shown as Figure 4 shown. G.fast spectrum such as Figure 5 shown. The specific steps of the solution provided in this embodiment are as follows:

[0126] 1. Obtain the transmission mode of the adjacent line pair of the G.fast line, the working frequency band overlapping with the G.fast line pair, the overlapping frequency band in the downlink direction and the overlapping frequency band in the uplink direction, and determine Notching in order to avoid near-end crosstalk (NEXT) Which overlapping frequency bands to drop; and determine the PSD (power spectral density) of adjacent lines at the deployment point in the working frequency band that has not been notched.

[0127] (1) Since VDSL / VDSL2 (collectively referred to as VD)...

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Abstract

The invention provides a collinear transmission method and device. The method comprises the following steps: determining an overlapped working frequency band between a first line pair and a second line pair in collinear transmission; and performing grooving or power reduction on the power spectrum density corresponding to the overlapped working frequency band of the first line pair. According to the invention, aiming at the problem that crosstalk exists between the line pairs in collinear transmission in the prior art, grooving or power reduction is carried out on the power spectrum density corresponding to the overlapped working frequency bands, so that the transmitting power of the line pairs does not have too much influence on adjacent channels, and meanwhile, the optimization of the transmission performance of the line is also achieved.

Description

technical field [0001] The present invention relates to the technical field of copper wire access network, in particular to a collinear transmission method and device. Background technique [0002] With the development of copper wire access network technology, asymmetric digital subscriber line (ADSL, Asymmetric Digital Subscriber Line), ADSL2 (second generation ADSL), ADSL2+ (ADSL2plus), VDSL (very high speed digital subscriber line), VDSL2 (second Generation ultra-high-speed digital subscriber line), G.fast (high-speed access user terminal system), G.mgfast / MGfast (multi-gigabit high-speed access user terminal system) and other transmission technologies have emerged one after another. The main feature of the evolution of copper wire technology is that the working bandwidth is getting bigger and bigger, from a few KHz of ADSL, to 17MHz, 30MHz, 35MHz of VDSL2, to 106MHz / 212MHz of G.fast; at the same time, the deployment distance is getting shorter and shorter. From a few ki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/32H04L25/08
CPCH04B3/32H04L25/08
Inventor 卢刘明胡珊
Owner ZTE CORP
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