Abstract: The disclosure generally describes computer-implemented methods, software, and systems for accessing volumes of data records structured to include sets dimensions, each dimension labelled in a manner specific to respective entities; identifying candidates data records keyed by managed keys that span a subset of dimensions even though at least one dimension from the subset of dimensions is labelled differently between the different volumes; comparing the candidate data records from the different volumes to determine whether a particular managed key is valid based on contents of the candidate data records from the different volumes; in response to determining that the particular managed key is valid, combining the candidate data records keyed by the valid managed key to be merged and accessible as one continuous entry; and in response to determining that the particular managed key is invalid, combining the candidate data records from the different volumes as separate entries.

Abstract: The disclosure generally describes computer-implemented methods, software, and systems for accessing volumes of data records structured to include sets dimensions, each dimension labelled in a manner specific to respective entities; identifying candidates data records keyed by managed keys that span a subset of dimensions even though at least one dimension from the subset of dimensions is labelled differently between the different volumes; comparing the candidate data records from the different volumes to determine whether a particular managed key is valid based on contents of the candidate data records from the different volumes; in response to determining that the particular managed key is valid, combining the candidate data records keyed by the valid managed key to be merged and accessible as one continuous entry; and in response to determining that the particular managed key is invalid, combining the candidate data records from the different volumes as separate entries.

Abstract: The disclosure generally describes computer-implemented methods, software, and systems for accessing volumes of data records structured to include sets dimensions, each dimension labelled in a manner specific to respective entities; identifying candidates data records keyed by managed keys that span a subset of dimensions even though at least one dimension from the subset of dimensions is labelled differently between the different volumes; comparing the candidate data records from the different volumes to determine whether a particular managed key is valid based on contents of the candidate data records from the different volumes; in response to determining that the particular managed key is valid, combining the candidate data records keyed by the valid managed key to be merged and accessible as one continuous entry; and in response to determining that the particular managed key is invalid, combining the candidate data records from the different volumes as separate entries.

Abstract: The disclosure generally describes computer-implemented methods, software, and systems for accessing volumes of data records structured to include sets dimensions, each dimension labelled in a manner specific to respective entities; identifying candidates data records keyed by managed keys that span a subset of dimensions even though at least one dimension from the subset of dimensions is labelled differently between the different volumes; comparing the candidate data records from the different volumes to determine whether a particular managed key is valid based on contents of the candidate data records from the different volumes; in response to determining that the particular managed key is valid, combining the candidate data records keyed by the valid managed key to be merged and accessible as one continuous entry; and in response to determining that the particular managed key is invalid, combining the candidate data records from the different volumes as separate entries.

Abstract: The disclosure generally describes computer-implemented methods, software, and systems for accessing volumes of data records structured to include sets dimensions, each dimension labelled in a manner specific to respective entities; identifying candidates data records keyed by managed keys that span a subset of dimensions even though at least one dimension from the subset of dimensions is labelled differently between the different volumes; comparing the candidate data records from the different volumes to determine whether a particular managed key is valid based on contents of the candidate data records from the different volumes; in response to determining that the particular managed key is valid, combining the candidate data records keyed by the valid managed key to be merged and accessible as one continuous entry; and in response to determining that the particular managed key is invalid, combining the candidate data records from the different volumes as separate entries.

Abstract: A method for reinforcing signals on coupled channels during idle periods transmits a first signal on a destination channel and a second signal on a source channel. The second signal is formulated to produce an optimal signal coupled into the destination channel to reinforce the first signal and is sent during idle periods in the source channel.

Abstract: A method for reinforcing signals on coupled channels during idle periods transmits a first signal on a destination channel and a second signal on a source channel. The second signal is formulated to produce an optimal signal coupled into the destination channel to reinforce the first signal and is sent during idle periods in the source channel.

Abstract: A method includes identifying, at a processor of a crosstalk analyzer, a first communication line of a plurality of communication lines and a second communication line of the plurality of communication lines. The first communication line and the second communication line identified based on a correlation of a crosstalk parameter with respect to the first communication line and the second communication line. The method also includes, responsive to identifying the first communication line and the second communication line, assigning, by the processor, the first communication line to a first port of an access node and the second communication line to a second port of the access node.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a controller to: determine crosstalk coupling characteristics between a plurality of lines of a digital subscriber line system connected to a plurality of modems based on a transition between a full power mode and one or more other modes, and provide the determined crosstalk coupling characteristics to one or more of the plurality of modems for performance of at least one of pre-coding a transmitted signal and processing a received signal along a line of the plurality of lines, where the pre-coding and processing is performed based at least in part on the determined crosstalk coupling characteristics, and where the pre-coding of the transmitted signal and the processing of the received signal reduce effects of fluctuating crosstalk. Other embodiments are disclosed.

Abstract: A method includes identifying, at a processor of a crosstalk analyzer, a first communication line of a plurality of communication lines and a second communication line of the plurality of communication lines. The first communication line and the second communication line identified based on a correlation of a crosstalk parameter with respect to the first communication line and the second communication line. The method also includes, responsive to identifying the first communication line and the second communication line, assigning, by the processor, the first communication line to a first port of an access node and the second communication line to a second port of the access node.

Abstract: A method includes identifying, at a processor, a set of communication lines from a plurality of communication lines, the set of communication lines including a first communication line and a second communication line. A first crosstalk characteristic of the first communication line is correlated with a second crosstalk characteristic of the second communication line. The method also includes modifying, at the processor, a first signal corresponding to the first communication line based on a second signal corresponding to the second communication line.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a controller to: determine crosstalk coupling characteristics between a plurality of lines of a digital subscriber line system connected to a plurality of modems based on a transition between a full power mode and one or more other modes, and provide the determined crosstalk coupling characteristics to one or more of the plurality of modems for performance of at least one of pre-coding a transmitted signal and processing a received signal along a line of the plurality of lines, where the pre-coding and processing is performed based at least in part on the determined crosstalk coupling characteristics, and where the pre-coding of the transmitted signal and the processing of the received signal reduce effects of fluctuating crosstalk. Other embodiments are disclosed.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a controller to: determine crosstalk coupling characteristics between a plurality of lines of a digital subscriber line system connected to a plurality of modems based on a transition between a full power mode and one or more other modes, and provide the determined crosstalk coupling characteristics to one or more of the plurality of modems for performance of at least one of pre-coding a transmitted signal and processing a received signal along a line of the plurality of lines, where the pre-coding and processing is performed based at least in part on the determined crosstalk coupling characteristics, and where the pre-coding of the transmitted signal and the processing of the received signal reduce effects of fluctuating crosstalk. Other embodiments are disclosed.

Abstract: A method includes identifying, at a processor, a set of communication lines from a plurality of communication lines, the set of communication lines including a first communication line and a second communication line. A first crosstalk characteristic of the first communication line is correlated with a second crosstalk characteristic of the second communication line. The method also includes modifying, at the processor, a first signal corresponding to the first communication line based on a second signal corresponding to the second communication line.

Abstract: A computer implemented method includes determining crosstalk characteristics of a plurality of digital subscriber lines. The computer implemented method includes identifying pairs of digital subscriber lines, each of the pairs including a first digital subscriber line and a second digital subscriber line, where the first digital subscriber line has a crosstalk characteristic that is correlated to the second digital subscriber line. The computer implemented method also includes rearranging terminations at an access node to assign at least one of the identified pairs of digital subscriber lines to a common vectoring group.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a controller to: determine crosstalk coupling characteristics between a plurality of lines of a digital subscriber line system connected to a plurality of modems based on a transition between a full power mode and one or more other modes, and provide the determined crosstalk coupling characteristics to one or more of the plurality of modems for performance of at least one of pre-coding a transmitted signal and processing a received signal along a line of the plurality of lines, where the pre-coding and processing is performed based at least in part on the determined crosstalk coupling characteristics, and where the pre-coding of the transmitted signal and the processing of the received signal reduce effects of fluctuating crosstalk. Other embodiments are disclosed.

Abstract: A system that incorporates teachings of the present disclosure may include, for example, a controller to: determine crosstalk coupling characteristics between a plurality of lines of a Digital Subscriber Line (DSL) system connected to a plurality of modems based on a transition between a full power mode and one or more other modes, and provide the determined crosstalk coupling characteristics to one or more of the plurality of modems for performance of at least one of pre-coding a transmitted signal and processing a received signal along a line of the plurality of lines, where the pre-coding and processing is performed based at least in part on the determined crosstalk coupling characteristics, and where the pre-coding of the transmitted signal and the processing of the received signal reduce effects of fluctuating crosstalk. Other embodiments are disclosed.

Abstract: A digital subscriber line (DSL) network provides enhanced dynamic spectrum management (DSM) based on estimated foreign interference obtained from monitoring unmanaged wire pairs in a cable. A DSL access multiplexer (DSLAM) or other line terminal provides vectored DSL signaling to a plurality of subscribers via a first set of wire pairs of the cable. The DSLAM monitors a second set of one or more wire pairs of the cable that are not connected to the vectored group associated with the first set of wire pairs to estimate foreign interference introduced to the first set of wire pairs. The DSLAM then modifies the vectored DSL transmitted signaling responsive to the estimated foreign interference so as to pre-cancel or otherwise compensate for the foreign interference introduced into the managed wire pairs.

Abstract: Systems and methods to mitigate impulse noise are provided. A particular method includes providing a signal from a transmission source to a mitigator. The mitigator checks the signal for complex impulse noise comprising at least a first periodic impulse noise component correlated to a first portion of a sinusoid representing frequency of an alternating current power source associated with the transmission source and a second periodic impulse noise component correlated to a second portion of the sinusoid. The method further includes receiving noise mitigation instructions from the mitigator at the transmission source to compensate for the complex impulse noise.

Abstract: Methods and apparatus to reduce errors during a re-transmission performed by a communication module are disclosed. An example method includes detecting an error in received data, predicting a time interval that is expected to be substantially error-free, and transmitting a re-transmission request message for the data based on the time interval.