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Method, device and system for detecting bridge tap

A technology of bridging taps and detecting bridges, which is applied in the direction of line transmission monitoring/testing, monitoring/monitoring/testing arrangements, line transmission components, etc., which can solve the problems of large amount of line topology calculations, achieve high accuracy, and increase calculation speed , the effect of reducing the amount of calculation

Active Publication Date: 2010-06-09
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of huge amount of calculation in the existing technology of calculating the line topology, the embodiment of the present invention provides the following technical solutions

Method used

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  • Method, device and system for detecting bridge tap
  • Method, device and system for detecting bridge tap
  • Method, device and system for detecting bridge tap

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Embodiment Construction

[0035] In order to solve the problem of a huge amount of calculation in the existing techniques for calculating the line topology, an embodiment of the present invention provides a method for detecting bridge taps.

[0036] Such as figure 2 As shown, the method for detecting bridge taps includes:

[0037] 201. Obtain the channel transfer function H(f) of the line between the sending end and the receiving end, and the steps include:

[0038] Such as image 3 As shown, 2011, send a test signal with known power spectral density and frequency range at the transmitter;

[0039] 2012. The receiving end receives the test signal;

[0040] 2013. Measure the received test signal and compare it with the test signal sent by the transmitting end, so as to obtain the channel transfer function H(f). In practical application, the channel transfer function H(f) can be obtained by the following methods:

[0041] 1) For ADSL2 (Asymmetrical Digital Subscriber Line 2, second-generation asymm...

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Abstract

The invention provides a method, a device and a system for detecting bridge tap, belonging to the field of digital subscriber line (DSL), and aiming to solving the problem the existing technology of obtaining line topology through connecting the resent DSL to the multiplexer network computing is hard to be used practically due to tremendous calculated amount. In the embodiment of the invention detecting is carried out to obtain channel transfer function of the line between a transmitting terminal and a receiving terminal; the channel transfer function is used to calculate and obtain line topology comprising the length and the number of the main line and the bridge tap. In comparison with the calculated amout of the present detecting line topology, the calculated amount of the method of the invention is largely reduced, the computing speed is widely improved, and the accuracy is high and over 85% according to the practical detecting result. The embodiment of the invention is applied to realize the function of obtaining the length of line through using double terminal detecting to finish single terminal detecting.

Description

technical field [0001] The present invention relates to digital subscriber line technology, in particular to a method, device and system for detecting bridge taps. Background technique [0002] In the existing technology of calculating the line topology, the line topology model is established first, such as figure 1 As shown, the line topology model includes the wire diameter and length of each section of the backbone ring, and the wire diameter and length of each bridge tap. Data is transmitted between the central office and the user end through the backbone line, and the bridge tap is an unused branch line connected across the twisted pair. In order to flexibly add or change user configurations, most user lines are connected in parallel with an open-circuit twisted pair, called bridge taps, which are generally closer to the user end. These taps will reflect the high-frequency signals transmitted by the digital, which may offset them. The useful signal pulse from the far ...

Claims

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Application Information

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IPC IPC(8): H04M3/30H04B3/46
Inventor 张朋瑞方李明
Owner HUAWEI TECH CO LTD
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