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US 2009/0219979 A1Published application
System and Method for Selectable Mask for LDSL
AssigneeConexant Systems, Inc.
InventorsPatrick Duvaut, Ehud Langberg
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Abstract
The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.
Claims1
A DSL system comprising:
- mask selection criteria, the criteria comprising:
- a weighted ratio of upstream rates and downstream rates;
- and
- a cost function based in part upon the weighted ratio;
- and
- a mask-selectable operator configured to select a spectral mask based on the mask selection criteria, wherein the mask-selectable operator selects a spectral mask based in part upon a determination of whether the cost function is greater than a predetermined value.
3 more elements
Dependencies are inferred from the claim text.