Pulse or digital communications – Synchronizers – Self-synchronizing signal
Reexamination Certificate
2007-04-24
2007-04-24
Bayard, Emmanuel (Department: 2611)
Pulse or digital communications
Synchronizers
Self-synchronizing signal
Reexamination Certificate
active
10670304
ABSTRACT:
A method and apparatus for conveying to a control shelf of a multi-shelf network node any master clock signal received via a plurality of interface cards associated with a plurality of peripheral shelves of the multi-shelf network node is presented. The apparatus operating in accordance with the method includes a peripheral shelf controller having: a selector selecting an External SYNChronization (ESYNC) signal from a multitude of ESYNC signals received at an associated peripheral shelf; a comparator deriving phase difference information in comparing the selected ESYNC signal and a SSYNC signal distributed by the control shelf; and encoder for digitally encoding the phase difference information at the peripheral shelf; means for conveying a digital phase difference information digitally between a peripheral shelf and the control shelf. The apparatus further includes a control shelf controller having: a phase difference information stream selector at the control shelf selects a phase difference information stream; an ESYNC regenerator providing to a system synchronization unit an ESYNC signal regenerated from the SSYNC signal and the selected phase difference information stream. Advantages are derived from a scalable synchronization signal infrastructure providing any selected ESYNC signal received via any interface card associated with any peripheral shelf of a multi-shelf network node to the control shelf for synchronizing an SSYNC signal thereto.
REFERENCES:
patent: 5638410 (1997-06-01), Kuddes
patent: 5910753 (1999-06-01), Bogdan
patent: 6229573 (2001-05-01), Sato et al.
patent: 2002/0027966 (2002-03-01), Fukuhara
patent: 2002/0180498 (2002-12-01), O'Leary et al.
patent: 1 045 557 (2000-10-01), None
patent: 1 326 385 (2003-07-01), None
Friesen Larry
Liu Geoffrey Chi Ho
Pike Dion
Alcatei
Bayard Emmanuel
Zegeer Jim
LandOfFree
Multi-shelf system clock synchronization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-shelf system clock synchronization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-shelf system clock synchronization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3750623