Multiline crosstalk test method, device and system

A test method and multi-line technology, applied in wired transmission systems, transmission systems, baseband system components, etc., can solve the problems of long time, large number of measurements, and large business impact.

Active Publication Date: 2013-07-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only test one of the lines one by one, and during the test, other lines cannot work and must be in a silent state. Moreover, it takes a long time to measure one by one, and frequent deactivation of lines is required, especially for large-scale lines. When the number of measurements required is huge, it will have a great impact on the business

Method used

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  • Multiline crosstalk test method, device and system
  • Multiline crosstalk test method, device and system
  • Multiline crosstalk test method, device and system

Examples

Experimental program
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Embodiment 1

[0090] figure 2 It is a flow chart of the multi-line crosstalk testing method provided in this embodiment, such as figure 2 Shown, method of the present invention comprises:

[0091] In step S101, the SMC configures a corresponding subcarrier test sequence for each of the multiple tested lines.

[0092] The SMC pre-configures multiple subcarrier test sequences and stores them in the Management Information Base (MIB).

[0093] The far-end crosstalk between two lines L1 and L2 includes two directions: the downlink direction and the uplink direction. The crosstalk coefficient of L2 to L1 in the downlink direction and the crosstalk coefficient of L1 to L2 in the uplink direction have a dual relationship, that is, in the case of the same frequency , the crosstalk level coefficients in both directions are equal. Therefore, when constructing subcarrier test sequences, SMC can construct subcarrier test sequences in two directions respectively, and calculate the crosstalk level co...

Embodiment 2

[0150] This embodiment takes the scenario where Legacy VDSL2 and Vectored-DSL are mixed as an example. The Vectored-DSL system can obtain the crosstalk information between Vector lines and Crosstalk information between. Use the crosstalk information obtained by the Vectored-DSL system to accelerate the calculation of other unknown crosstalk information in the mixed scene, and obtain the crosstalk information of Legacy line to Legacy line and Vector line to Legacy line, that is, use the known crosstalk level coefficient and the operation of collection Parameters are combined for calculation, which can shorten the calculation time.

[0151] Figure 4 It is a flow chart of the multi-line crosstalk testing method provided in this embodiment, such as Figure 4 As shown, the method includes:

[0152] In step S201, the SMC configures a corresponding subcarrier test sequence for each of the multiple tested lines.

[0153] Optionally, the SMC may configure a corresponding subcarrie...

Embodiment 3

[0169] Figure 5 It is a schematic diagram of the multi-line crosstalk testing device provided in this embodiment, such as Figure 5 As shown, the multi-line crosstalk testing device of the present invention includes: a configuration unit 10 , a sending unit 20 , an acquisition unit 30 and a calculation unit 40 .

[0170] The configuration unit 10 is configured to configure a corresponding subcarrier test sequence for each of the multiple tested lines, the subcarrier test sequence includes at least one shielded frequency point, and the shielded transmission corresponding to the shielded frequency point Frequency subcarrier signal.

[0171] The configuration unit 10 pre-configures multiple subcarrier test sequences and stores them in the management information base.

[0172] The far-end crosstalk between two lines L1 and L2 includes two directions: the downlink direction and the uplink direction. The crosstalk coefficient of L2 to L1 in the downlink direction and the crosstal...

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Abstract

The invention relates to a multiline crosstalk test method, device and system. The method includes: configuring a corresponding subcarrier test sequence, which includes at least one shielding frequency point, for each of the multiple tested lines and shielding transmission of subcarrier signals of corresponding frequencies on the shielding frequency points; controlling the loading, which is carried out by the sending terminal of each of the tested lines, of the subcarrier test sequence corresponding to each of the tested lines and sending the subcarrier test sequences to corresponding receiving terminals via each of the tested lines; collecting operating parameter information on each of the tested lines; and calculating the crosstalk level coefficient between every two of the tested lines according to the operating parameter information correspondingly received from the multiple tested lines. The multiline crosstalk test method, device and system enable multiple lines to be tested simultaneously so that the crosstalk test can be completed rapidly and precisely while the tested lines can still work normally. So effect on user service is small.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a multi-line crosstalk testing method, device and system. Background technique [0002] Digital Subscriber Line (Digital Subscriber Line, DSL) technology is a high-speed transmission technology for data transmission through telephone twisted pair, namely Unshielded Twist Pair (UTP), including Asymmetrical Digital Subscriber Line (Asymmetrical Digital Subscriber Line) Subscriber Line, ADSL), Very-high-bit-rate Digital Subscriber Line (VDSL), ISDN Digital Subscriber Line (IDSL) based on Integrated Services Digital Network (ISDN) ) and Single-pair High-bit-rate Digital Subscriber Line (Single-pair High-bit-rate Digital Subscriber Line, SHDSL), etc. [0003] Among various digital subscriber line technologies (xDSL), DSL using passband transmission uses frequency division multiplexing technology to enable DSL and traditional telephone services (Plain Old Telephone Service, POT...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03H04B3/487H04M3/34H04M11/062
Inventor 涂建平
Owner HUAWEI TECH CO LTD
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