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. 05, 2002
Filed:
Dec. 15, 1998
Andrew David Wallace, Harlow, GB;
Christopher Neville Tate, Herts, GB;
Mike Francis Grant, Hertfordshire, GB;
Nortel Networks Limited, St. Laurent, CA;
Abstract
To reduce power consumption and associated heating in a line card of line termination equipment (LTE, ) employing multiple cub-channel carriers to communicate broadband information to customer premise equipment (CPE, ) down a wireline communication resource ( , sub-channel carrier transmissions are restricted ( ) during periods of CPE inactivity. Power supplies to a power amplifier ( ) associated with the line card and wireline resource ( ) are reduced, with digital signal processing capabilities of the LTE ( ) further restricted ( ). When the CPE wishes to re-start communication, the CPE ( ) locks ( ) to a correct alignment in a transmission scheme using a pilot tone that is transmitted within a simple pattern sent during reduced sub-channel carrier transmissions. Alternatively, should all transmission from the LTE cease during CPE inactivity, then the CPE monitors ( ) the transmission environment and sends ( ) a wake-up call to the LTE between boundaries of an uplink slot. The LTE ( ) re-establishes pilot tone transmissions ( ), with synchronization and lock ( ) subsequently achievable by the CPE ( ): this is illustrated in FIG.