Method, apparatus and system for reducing interference in digital subscriber line

Abstract

The present invention provides a method, an apparatus, and a system for reducing digital subscriber line interference, so as to reduce, as much as possible, or eliminate an influence of a legacy line on a vectored line in a digital subscriber line system. The method includes: identifying at least one legacy digital subscriber line in a digital subscriber line DSL legacy line set; obtaining a target power spectral density mask value of the legacy digital subscriber line; and reducing power spectral density of a transmit signal on the legacy digital subscriber line according to the target power spectral density mask value. The method according to embodiments of the present invention can achieve an effect of eliminating far end crosstalk caused on a Vectored DSL line without upgrading or replacing a VDSL2 Legacy CPE, thereby reducing time consumed by the upgrade, and eliminating human and material (such as device) costs caused by the upgrade.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for reducing digital subscriber line interference. Background technique [0002] 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 (ADSL), Very-high-bit-rate Digital Subscriber Line (VDSL), ISDN Digital Subscriber Line based on Integrated Services Digital Network (ISDN), IDSL), etc., xDSL is the general term for the above-mentioned digital subscriber lines. [0003] In addition to IDSL and DSL with baseband transmission such as Symmetric High bit rate Digital Subscriber Line (SHDSL), xDSL with passband transmission uses frequency division multiplexing technology to make xDSL and the traditional telephone service (POTS, Plain Old Telephone Service) ...

AI Technical Summary

Problems solved by technology

[0022] 1) high cost

First, upgrading all VDSL2 Legacy CPEs on the existing network will consume a lot of cost. Second, some older VDSL2 Legacy CPEs may not be able to be upgraded to vectorization (Vector ) of the CPE, thereby requiring replacement of the entire CPE, which will further increase costs;

[0023] 2) The upgrade cycle is long

Due to the large stock of VDSL2 Legacy CPE on the existing network, the upgrade cannot be completed overnight, and various factors such as users not at home will still lead to the coexistence of Vectored CPE and VDSL2 Legacy CPE for a long period of time

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