Apparatus, method and system having reduced power consumption in a multi-carrier wireline environment
US6353628B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1998 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To reduce power consumption and associated heating in a line card of line termination equipment (LTE, 12) employing multiple cub-channel carriers to communicate broadband information to customer premise equipment (CPE, 30) down a wireline communication resource (26, sub-channel carrier transmissions are restricted (58) during periods of CPE inactivity. Power supplies to a power amplifier (30) associated with the line card and wireline resource (26) are reduced, with digital signal processing capabilities of the LTE (12) further restricted (64). When the CPE wishes to re-start communication, the CPE (30) locks (68) 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 (80) the transmission environment and sends (82) a wake-up call to the LTE between boundaries of an uplink slot. The LTE (12) re-establishes pilot tone transmissions (86), with synchronization and lock (88) subsequently achievable by the CPE (30): this is illustrated in FIG. 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.