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US 10,567,037 B2Granted
Methods, devices and systems of supporting discontinuous operation in communication systems using vectoring
AssigneeLantiq Deutschland GmbH
InventorsRainer Strobel, Vladamir Oksman
Life of this patent
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Abstract
Methods, devices and techniques are disclosed where vectoring is adapted to lines becoming inactive and active, for example in a discontinued operation. In some embodiments, the vectoring is modified based on already present coefficients.
Claims24
A device arranged to transmit data in a discontinuous operation network, wherein the device comprising:
- a processor, and a memory;
- wherein the device configured to:
- transmit on any of the plurality of lines symbols corresponding to the data are transmitted during a transmission opportunity of a time division duplex (TDD) frame;
- transmit on any one of the plurality of lines in a discontinuous operation mode quiet or idle symbols when no data is available for transmission on that one of the plurality of lines;
- perform crosstalk reduction of a plurality of lines in a vectored group using a crosstalk reduction circuit;
- and
- modify the crosstalk reduction based on a previous crosstalk reduction in case of a change of composition of the vectored group in the discontinuous operation mode;
- wherein, for a case where one line of the lines is deactivated, the device is configured to perform crosstalk reduction by precompensating for crosstalk according to:
- xai=piaT·ua−pdi·padT·ua
- wherein xai is a signal sent on active line a, P is a precompensation matrix, i indicates an inactive line and u is a vector of data signals to be sent on active lines.
7 more elements
A device arranged to transmit data in a discontinuous operation network, wherein the device comprising:
- a processor, and a memory;
- wherein the device configured to:
- transmit on any of the plurality of lines symbols corresponding to the data are transmitted during a transmission opportunity of a time division duplex (TDD) frame;
- transmit on any one of the plurality of lines in a discontinuous operation mode quiet or idle symbols when no data is available for transmission on that one of the plurality of lines;
- perform crosstalk reduction of a plurality of lines in a vectored group using a crosstalk reduction circuit;
- and
- modify the crosstalk reduction based on a previous crosstalk reduction in case of a change of composition of the vectored group in the discontinuous operation mode;
- wherein, for a case where one line of the lines is deactivated, the device is configured to perform crosstalk reduction by precompensating for crosstalk according to
- xa=Paaua−Pda·Pdd−1·Pad·ua
- wherein for matrix inversion an approximation according to
- [
- P
- dd
- -
- 1
- ]
- ij
- ≈
- {
- -
- p
- ddij
- for
-
-
- i
- ≠
- j
- p
- ddij
- for
-
-
- i
- =
- j
- is used, where x is a vector of signals sent on active lines, P is a precompensation matrix, and u is a vector of data signals to be sent on the active lines.
34 more elements
A device arranged to transmit data in a discontinuous operation network, wherein the device comprising:
- a processor, and a memory;
- wherein the device configured to:
- transmit on any of the plurality of lines symbols corresponding to the data are transmitted during a transmission opportunity of a time division duplex (TDD) frame;
- transmit on any one of the plurality of lines in a discontinuous operation mode quiet or idle symbols when no data is available for transmission on that one of the plurality of lines;
- perform crosstalk reduction of a plurality of lines in a vectored group using a crosstalk reduction circuit;
- and
- modify the crosstalk reduction based on a previous crosstalk reduction in case of a change of composition of the vectored group in the discontinuous operation mode;
- wherein, for a case when one line of the lines is deactivated, the device is configured to perform crosstalk reduction by precompensating crosstalk using a non-linear precoding according to:
- xa=Pf aa·umod a+(Haa−1·Had)·Pf da·umod a
- wherein H is a channel matrix, where x is a vector of signals sent on active lines, P is a precompensation matrix, and ua is a vector of data signals to be sent on the active lines.
7 more elements
A device arranged to transmit data in a discontinuous operation network, wherein the device comprising:
- a processor, and a memory;
- wherein the device configured to:
- transmit on any of the plurality of lines symbols corresponding to the data are transmitted during a transmission opportunity of a time division duplex (TDD) frame;
- transmit on any one of the plurality of lines in a discontinuous operation mode quiet or idle symbols when no data is available for transmission on that one of the plurality of lines;
- perform crosstalk reduction of a plurality of lines in a vectored group using a crosstalk reduction circuit;
- and
- modify the crosstalk reduction based on a previous crosstalk reduction in case of a change of composition of the vectored group in the discontinuous operation mode;
- wherein, for a case where one line of the lines is deactivated, the device is configured to perform crosstalk reduction according to:
- ûa=Gaaya−Gda·Gdd−1·Gad·ya,
- wherein ûa is a corrected received signal, ya is a received and G is an equalization matrix for a case when all lines are active.
7 more elements
Dependencies are inferred from the claim text.