The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2004
Filed:
Mar. 13, 2000
Daniel Amrany, Wayside, NJ (US);
William H. Scholtz, Middletown, NJ (US);
Globespanvirata, Inc., Red Bank, NJ (US);
Abstract
The present invention is directed to a system and method that detects periods of no activity in the downstream data path of a DSL modem and reduces the transmit power in the output line driver to reduce power consumption in the modem. A preferred method is operative at the central office DSL modem and comprises detecting periods of no activity in the downstream data bins, reducing the transmit power in response to the inactivity on the communication link, detecting either upstream or downstream data, and performing a fast retrain of the modem to restore nominal power data transmission in the downstream direction. A variation of the preferred method uses a reduced point constellation encoding scheme to reduce power consumption. Broadly, the system of the present invention may be realized by a configurable transmit channel line driver and a digital signal processor.