Pulse or digital communications – Transceivers – Transmission interface between two stations or terminals
Reexamination Certificate
2011-04-26
2011-04-26
Payne, David C (Department: 2611)
Pulse or digital communications
Transceivers
Transmission interface between two stations or terminals
C375S227000, C455S420000
Reexamination Certificate
active
07933318
ABSTRACT:
The present invention relates to a first transceiver unit, acting as a receiver unit, and to a second transceiver unit, acting as a transmitter unit. The first transceiver unit measures the signal to noise ratio for each tone, and determine whether a tone shall be shut off, thereby reducing interference on neighboring lines and power consumption. If so, the first transceiver unit keeps on measuring the noise level over that tone. If the ratio of the initially measured signal level to the newly measured noise level exceeds a pre-determined threshold, then the first transceiver unit requests the second transceiver unit to re-activate that tone. A new initialization sequence is transmitted over that tone for initializing the frequency domain equalizer, for measuring the signal to noise ratio, and finally for agreeing on a bit loading.
REFERENCES:
patent: 5903608 (1999-05-01), Chun
patent: 5956642 (1999-09-01), Larsson et al.
patent: 6452907 (2002-09-01), Levin
patent: 6473394 (2002-10-01), Marchok et al.
patent: 6751467 (2004-06-01), Cameron et al.
patent: 2002/0163705 (2002-11-01), Bakker et al.
patent: 2003/0012152 (2003-01-01), Feldman et al.
patent: 2003/0054852 (2003-03-01), Ginesi et al.
patent: 2003/0073435 (2003-04-01), Thompson et al.
patent: 2004/0113814 (2004-06-01), Lochner
patent: 2004/0166884 (2004-08-01), Oh et al.
patent: WO 03/041367 (2003-05-01), None
International Telecommunication Union (ITU), Telecommunication Standardization Sector of ITU(ITU-T), G.992.3, Series G: Transmission Systems and Media, Digital Systems and Networks, Digital Sections and digital line system—Access networks, “Asymmetric digital subscriber line (ADSL) transceivers—2(ADLS2)”(Jul. 2002).
Van den Bogaert Etienne André Hubert
Van Elsen Jeroen Celina Karel
Alcatel
Payne David C
Stevens Brian J
Sughrue & Mion, PLLC
LandOfFree
Carrier re-activation in case of signal to noise ratio... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Carrier re-activation in case of signal to noise ratio..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier re-activation in case of signal to noise ratio... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2639643