Method, Apparatus, and System for Reducing Digital Subscriber Line Interference

A method for reducing digital subscriber line interference, comprising:

• identifying at least one legacy digital subscriber line in a digital subscriber line set, wherein the digital subscriber line set comprises at least one vectored digital subscriber line and the legacy digital subscriber line;
• obtaining a target power spectral density mask value, wherein the target power spectral density mask value is a reference value for reducing interference of the legacy digital subscriber line on the vectored digital subscriber line;
• and
• configuring a port template parameter according to the target power spectral density mask value to reduce interference of the legacy digital subscriber line on the vectored digital subscriber line;
• wherein obtaining the target power spectral density mask value of the legacy digital subscriber line comprises one of following two modes:
• estimating the target power spectral density mask value of the legacy digital subscriber line according to a digital subscriber line interference model;
• or
• calculating the target power spectral density mask value of the legacy digital subscriber line by obtaining a channel parameter of the legacy digital subscriber line.

An apparatus comprising a central office transceiver unit in a digital subscriber line system, wherein the apparatus comprises:

• an identifying module, configured to identify at least one legacy digital subscriber line in a digital subscriber line set, wherein the digital subscriber line set comprises at least one vectored digital subscriber line and the legacy digital subscriber line;
• an obtaining module, configured to obtain a target power spectral density mask value of the legacy digital subscriber line, wherein the target power spectral density mask value is a reference value for reducing interference of the legacy digital subscriber line on the vectored digital subscriber line;
• and
• a reducing module, configured to reduce power spectral density of a transmit signal on the legacy digital subscriber line according to the target power spectral density mask value;
• wherein the obtaining module comprises an estimating unit that is configured to estimate the target power spectral density mask value of the legacy digital subscriber line according to a digital subscriber line interference model or a calculating unit that is configured to calculate the target power spectral density mask value of the legacy digital subscriber line by obtaining a channel parameter of the legacy digital subscriber line.

An apparatus for reducing digital subscriber line interference, the apparatus comprising:

• a line identifying module, configured to identify at least one legacy digital subscriber line in a digital subscriber line set, wherein the digital subscriber line set comprises at least one vectored digital subscriber line and the legacy digital subscriber line;
• a reference value obtaining module, configured to obtain a target power spectral density mask value of the legacy digital subscriber line, wherein the target power spectral density mask value is a reference value for reducing interference of the legacy digital subscriber line on the vectored digital subscriber line;
• and
• a configuring module, configured to configure a port template parameter according to the target power spectral density mask value to reduce interference of the legacy digital subscriber line on the vectored digital subscriber line;
• wherein the reference value obtaining module comprises a first estimating unit that is configured to estimate the target power spectral density mask value of the legacy digital subscriber line according to a digital subscriber line interference model or a first calculating unit that is configured to calculate the target power spectral density mask value of the legacy digital subscriber line by obtaining a historical channel parameter of the legacy digital subscriber line.

A system comprising:

• a digital subscriber line access multiplexer;
• at least one vectored digital subscriber line;
• at least one legacy digital subscriber line;
• and
• at least one vectored customer premises equipment, and at least one legacy customer premises equipment;
• wherein the digital subscriber line access multiplexer comprises a central office transceiver unit in a vectored digital subscriber line system;
• wherein the at least one vectored digital subscriber line is configured to connect the at least one vectored customer premises equipment to the central office transceiver unit in the vectored digital subscriber line system;
• wherein the at least one legacy digital subscriber line is configured to connect the at least one legacy customer premises equipment to the central office transceiver unit in the vectored digital subscriber line system;
• wherein the at least one vectored customer premises equipment is configured to interact with the central office transceiver unit in the vectored digital subscriber line system by using the at least one vectored digital subscriber line;
• wherein the at least one legacy customer premises equipment is configured to interact with the central office transceiver unit in the vectored digital subscriber line system by using the at least one legacy digital subscriber line;
• and
• wherein the central office transceiver unit in the vectored digital subscriber line system is configured to identify the at least one legacy digital subscriber line in a digital subscriber line set, to obtain a target power spectral density mask value of the legacy digital subscriber line, and to reduce power spectral density of a transmit signal on the at least one legacy digital subscriber line according to the target power spectral density mask value.