Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate
2006-09-12
2006-09-12
Tieu, Binh K. (Department: 2614)
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of data transmission
C379S027010, C379S416000, C379S417000, C370S201000, C375S296000
Reexamination Certificate
active
07106833
ABSTRACT:
An automatic system for the provisioning, deployment and management of digital subscriber lines (DSL) in a telephone network uses data on loop composition, electromagnetic interference and crosstalk between lines to optimize the performance and correct problems with one or more symmetric and or asymmetric digital subscriber lines in a cable. The system optimizes DSL lines on an individual basis using measurements and data. The optimal transmit power spectral density (PSD) for each DSL can be found in an iterative manner. Starting each DSL with some predetermined starting parameter, the transmit PSD of each DSL is optimized in round-robin fashion. The crosstalk into a given DSL is calculated as the power sum of all transmissions passed through their measured crosstalk couplings. An asymmetric DSL has its transmit PSD optimized by using the “waterfilling” technique. A symmetric or single carrier DSL has its transmit PSD optimized simply as being the PSD corresponding to the maximum bit rate that it can reliably transmit. The joint optimization algorithm converges rapidly to unique values after only a few iterations. Each DSL may also be analyzed by the DSL management system to correct for crosstalk disturbers and electromagnetic interference (EMI) on an individual basis.
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Giordano Joseph
Schoneman William A.
Telcordia Technologies Inc.
Tieu Binh K.
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