System for maintaining synchronization between multiple...

Details System for maintaining synchronization between multiple... System for maintaining synchronization between multiple...

2006-05-23

2006-05-23

Sam, Phirin (Department: 2661)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S516000

Reexamination Certificate

active

07050420

ABSTRACT:
An apparatus for maintaining synchronization with a plurality of asynchronous communication links includes a first counter that generates a first local network clock, and a second counter that generates a second local network clock. The apparatus also includes an offset controller coupled with the first counter and coupled with the second counter, the offset controller configured to load a current network clock value of a first network clock of a first communication link into the first counter, and to load a current network clock value of a second network clock of a second communication link into the second counter. The apparatus further includes a drift controller coupled with the first counter and with the second counter, the drift controller configured to correct a drift between the first local network clock and the first network clock and to correct a drift between the second local network clock and the second network clock. The first local network clock approximates the first network clock of the first communication link and the second local network clock approximates the second network clock of the second communication link.

REFERENCES:
patent: 6111896 (2000-08-01), Slattery et al.
patent: 6633590 (2003-10-01), Garofalo et al.

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