Pulse or digital communications – Transceivers
Reexamination Certificate
2004-12-02
2008-08-05
Tran, Khanh C (Department: 2611)
Pulse or digital communications
Transceivers
C370S252000
Reexamination Certificate
active
07408980
ABSTRACT:
A semi-distributed method of managing the spectral power over multiple digital subscriber line communication loops (LP1, LP2) is disclosed. A central office (CO) DSL transceiver (10) and a remote terminal (RT) DSL transceiver (15) communicate with customer premises equipment (CPE) (121, 122) over separate twisted-pair wire loops (LP1, LP2) that are in sufficient physical proximity with one another as to suffer from crosstalk. A network management center (NMC) (20) initializes a price parameter, which is used by the CO (10) and RT (15) in independent maximization problems. The CO (10) derives a maximum tolerable power spectral density for the RT (15) that permits the CO (10) to reach a target data rate, and the RT (15) derives an actual power spectral density that maximizes its data rate, each using the price parameter. The NMC (20) compares the actual RT power spectral density to the tolerable RT power spectral density, and adjusts the price parameter accordingly, with the process repeating until convergence. As a result, the RT data rate is maximized to a level that still permits the CO (10) to reach its target data rate, thus maximizing the overall network data rate.
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Brady W. James
Shaw Steven A.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Tran Khanh C
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