Title:
METHOD AND SYSTEM FOR PREESTIMATING MAXIMUM BANDWIDTH OF SUBSCRIBER LINE IN DIGITAL SUBSCRIBER LOOP
Document Type and Number:
WIPO Patent Application WO/2010/148854
Kind Code:
A1
Abstract:
A method and a device for preestimating the maximum bandwidth of a subscriber line in a digital subscriber loop. The method comprises: obtaining independent crosstalk noise according to the line length of the measured subscriber line, the line transfer equation, and the power spectral density of each frequency signal in the band of a Digital Subscriber Loop(DSL) of the other subscriber lines in the line pair where the measured subscriber line is located; obtaining a total crosstalk noise by time domain superposition; according to the DSL band adopted by the measured subscriber line, selecting the total crosstalk noise and line attenuation subjected by each frequency signal in this band; obtaining the signal-to-noise ratio of each frequency signal in this band using the power spectral density of each frequency signal in this band; and obtaining the maximum bandwidth according to the frequency domain form of the Shannon theorem. The solution can exactly preestimate the maximum bandwidth of the subscriber line before the DSL services are actually launched.
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Inventors:
BAI HAIBIN (CN)
Application Number:
PCT/CN2010/073019
Publication Date:
December 29, 2010
Filing Date:
May 20, 2010
Export Citation:
Assignee:
ZTE CORP (CN)
BAI HAIBIN (CN)
BAI HAIBIN (CN)
International Classes:
H04L12/24; H04L12/26
Domestic Patent References:
| WO2002069580A1 | 2002-09-06 |
Foreign References:
| CN1535506A | 2004-10-06 |
Other References:
See also references of EP 2451121A4
None
None
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (E-Wing CenterNo. 113 Zhichun Road,Haidian District, Beijing 6, CN)
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