Method, device and system for eliminating DSL crosstalk

A method for eliminating crosstalk between digital subscriber lines (DSLs), comprising:

• notifying, by a coordinated transceiver device, an existing online opposite device of a signal sent to a new online opposite device, comprising
• sending, by the coordinated transceiver device, an ID of a signal sequence that is used to generate the signal and a time when the signal is sent, to the existing online opposite device, wherein a certain number of same signal sequences are respectively pre-stored in the coordinated transceiver device and the existing online opposite device;
• and
• obtaining, by the existing online opposite device, the signal according to the stored signal sequences, the ID of the signal sequence, and the time when the signal is sent;
• receiving, by the coordinated transceiver device, a result of a calculation that is obtained by the existing online opposite device, wherein the calculation is performed based on a detected error signal and the signal sent to the new online opposite device;
• and
• updating, by the coordinated transceiver device, a coefficient of a vector pre-encoder based on the calculation result.

A digital subscriber line (DSL) coordinated transceiver device, comprising:

• a notifying unit, adapted to notify an existing online opposite device of a signal sent to a new online opposite device, the notifying unit comprising:
• a storing unit, adapted to store a sequence generator;
• and
• a sequence sending unit, adapted to send an initial value of the sequence generator that is used to generate the signal and a time when the signal is sent, to the existing online opposite device, so as to inform the existing online opposite device to obtain the signal according to the initial value and perform the calculation;
• a receiving unit, adapted to receive a calculation result fed back by the existing online opposite device, wherein the calculation result is obtained by the existing online opposite through performing a calculation based on a detected error signal and the signal sent to the new online opposite device;
• and
• an updating unit, adapted to update a coefficient of a vector pre-encoder according to the calculation result.

A digital subscriber line (DSL) coordinated transceiver device, comprising:

• a notifying unit, adapted to notify an existing online opposite device of a signal sent to a new online opposite device, the notifying unit comprising:
• a storing unit, adapted to store a predetermined number of signal sequences;
• and
• a sequence sending unit, adapted to send an ID of a signal sequence that is used to generate the signal and a time when the signal is sent, to the existing online opposite device, so as to inform the existing online opposite device to obtain the signal according to the ID and perform the calculation;
• a receiving unit, adapted to receive a calculation result fed back by the existing online opposite device, wherein the calculation result is obtained by the existing online opposite through performing a calculation based on a detected error signal and the signal sent to the new online opposite device;
• and
• an updating unit, adapted to update a coefficient of a vector pre-encoder according to the calculation result.

A system for eliminating crosstalk between digital subscriber lines (DSLs), comprising:

• a coordinated transceiver device, comprising:
• a notifying unit, adapted to notify an existing online opposite device of a signal sent to a new online opposite device;
• a receiving unit, adapted to receive a calculation result fed back by an existing online opposite device;
• and
• an updating unit, adapted to update a coefficient of a vector pre-encoder based on the calculation result;
• and
• an opposite device, comprising:
• an obtaining unit, adapted to obtain the signal that the coordinated transceiver device sends to the new online opposite device, the obtaining unit comprising:
• a storing unit, adapted to store a sequence generator;
• a sequence receiving unit, adapted to receive an initial value of the sequence generator that generates the signal sent to the new online opposite device and a time when the signal is sent, from the coordinated transceiver device;
• and
• a signal generating unit, adapted to generate the signal that the coordinated transceiver device sends to the new online opposite device according to the configured sequence generator, the initial value of the sequence generator, and the time when the signal is sent
• a detecting unit, adapted to detect an error signal;
• a calculating unit, adapted to perform a calculation based on the detected error signal and the obtained signal sent to the new online opposite device;
• and
• a feedback unit, adapted to feed back a calculation result of the calculating unit to the coordinated transceiver device.

A system for eliminating crosstalk between digital subscriber lines (DSLs), comprising:

• a coordinated transceiver device, comprising:
• a notifying unit, adapted to notify an existing online opposite device of a signal sent to the new online opposite device;
• a receiving unit, adapted to receive a calculation result fed back by an existing online opposite device;
• and
• an updating unit, adapted to update a coefficient of a vector pre-encoder based on the calculation result;
• and
• an opposite device, comprising:
• an obtaining unit, adapted to obtain a signal that the coordinated transceiver device sends to the new online opposite device, the obtaining unit comprising:
• a storing unit, adapted to store a predetermined number of signal sequences;
• a sequence receiving unit, adapted to receive an ID of a signal sequence that is used to generate the signal and a time when the signal is sent, from the coordinated transceiver device;
• and
• a signal generating unit, adapted to generate the signal that the coordinated transceiver device sends to the new online opposite device according to the stored signal sequence, the ID of the signal sequence, and the time when the signal is sent
• a detecting unit, adapted to detect an error signal;
• a calculating unit, adapted to perform a calculation based on the detected error signal and the obtained signal sent to the new online opposite device;
• and
• a feedback unit, adapted to feed back a calculation result of the calculating unit to the coordinated transceiver device.