Method and device for shortening link establishing time, and local end equipment

A central office device and timing technology, applied in the field of network communication, can solve problems such as short transmission distance, lower line transmission rate, and increase the link establishment time of user end equipment, so as to simplify the estimation process, reduce link establishment time, and improve user experience Effect

Inactive Publication Date: 2016-03-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, because the frequency band that described VDSL2 technology uses is higher, cause digital subscriber line (DSL, Digital Subscriber Line) inter-pair crosstalk, that is, DSL crosstalk problem is relatively prominent, compared with the bandwidth of single-line pair VDSL2 access, multi-line pair When VDSL2 is connected, the bandwidth of each line pair drops very obviously. Therefore, the DSL crosstalk problem has become the main factor of VDSL2 performance.
[0003] The DSL crosstalk is divided into near-end crosstalk (NEXT, Near-endCrosstalk) and far-end crosstalk (FEXT, Far-endCrosstalk); wherein, the FEXT is that the transmission signal of the interfering line pair starts from the interfering line pair and is coupled to the interfered After the line pair, continue to propagate along the disturbed line pair until it propagates to the "far-end" receiving end of the disturbed line pair; the NEXT is that the transmitted signal of the disturbing line pair starts from the disturbing line pair and is coupled to the disturbed line pair , and then transmitted to the "near-end" receiving end of the disturbed line pair; for the DSL crosstalk, the FEXT is the interference between uplink signals of different line pairs, or between downlink signals of different line pairs; and Described NEXT is the interference between the uplink signal and the downlink signal of different wire pairs; Since the VDSL2 technology adopts the frequency division multiplexing (FDM, Frequency Division Multiplexing) mode, the transmission signal of the interfering wire pair and the received signal of the interfered wire pair use The frequency bands are different, so the NEXT can be eliminated or greatly reduced by the filter; how

Method used

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  • Method and device for shortening link establishing time, and local end equipment
  • Method and device for shortening link establishing time, and local end equipment
  • Method and device for shortening link establishing time, and local end equipment

Examples

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Example Embodiment

[0060] Embodiment one

[0061] figure 2 It is a schematic flow chart of the method for shortening the chain establishment time in the embodiment of the present invention; figure 2 As shown, the method is applied in a vectorization system, and the method includes:

[0062] Step 201: When it is determined that the historical far-end crosstalk data of the crosstalk cancellation line pair initialization line conforms to the first preset rule, use the historical far-end crosstalk data as the first remote end of the crosstalk cancellation line pair initialization line in the current link establishment state crosstalk data;

[0063] Step 202: Establish a link according to the first far-end crosstalk data;

[0064] Wherein, the initialization line is a line corresponding to the current link establishment; the crosstalk elimination line is a line that causes crosstalk to the initialization line during the current link establishment.

[0065] In practical applications, the client ...

Example Embodiment

[0109] Embodiment two

[0110] Figure 5 It is a schematic flowchart of the specific implementation of the method for shortening the link establishment time in the embodiment of the present invention, as shown in Figure 5 As shown, the method includes:

[0111] Step 501: The central office device determines that historical FEXT data is stored, that is, the condition for using historical FEXT data for link establishment in the central office device is configured as enable;

[0112] Wherein, the historical far-end crosstalk data is determined by using the G993.5 standard during the link establishment process.

[0113] Step 502: The central office device determines that the storage time of the historical far-end crosstalk data is less than or equal to 24 hours, that is, the effective time of configuring the historical far-end crosstalk data in the central office device is 24 hours;

[0114] Step 503: The central office device determines that the drop in the allowable signal-t...

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Abstract

The invention discloses a method for shortening link establishing time. The method comprises the steps: determining that when historical far-end crosstalk data of an initial line for a crosstalk elimination line accords with a first preset rule, taking the historical far-end crosstalk data as first far-end crosstalk data of the initial line for the crosstalk elimination line in a current link establishing state; establishing a link according to the first far-end crosstalk data. The initial line is a line corresponding to current link establishment, and the crosstalk elimination line is a line acting on the initial line during current link establishment. The invention also discloses a device for shortening link establishing time, and also local end equipment.

Description

technical field [0001] The invention relates to network communication technology, in particular to a method for shortening the link establishment time, its device, and central office equipment. Background technique [0002] The second generation of very high-speed digital subscriber loop (VDSL2, Very-high-bit-rateDigitalSubscriberloop) is one of the "last mile" mainstream copper wire access technologies, using discrete multi-tone method to modulate data in different The transmission is carried out on the sub-carrier, and the spectral bandwidth up to 30MHz can be used. Therefore, the VDSL2 technology has the advantages of higher transmission rate, longer transmission distance and optimal network utilization. But, because the frequency band that described VDSL2 technology uses is higher, cause digital subscriber line (DSL, Digital Subscriber Line) inter-pair crosstalk, that is, DSL crosstalk problem is relatively prominent, compared with the bandwidth of single-line pair VDSL2...

Claims

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Application Information

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IPC IPC(8): H04B3/32
CPCH04Q11/04H04Q2213/1319
Inventor 吴洲
Owner ZTE CORP
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