Systems and methods for synchronizing time across networks

Details Systems and methods for synchronizing time across networks Systems and methods for synchronizing time across networks

2005-05-12

2009-08-11

Eisen, Alexander (Department: 2617)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S503000, C713S400000, C713S500000

Reexamination Certificate

active

07573914

ABSTRACT:
By equipping receiving devices in a network with synchronizable clocks it is possible to periodically send an “impulse” signal that is received by all of the clocks at the same (or relatively the same) instant of time. The accuracy of the impulse clock need not be high, only that its signal reach all the clocks approximately at the same time. In one embodiment, a transmitting device, upon receipt of the synchronizing impulse signal, sends a packet of data bearing the sending device's epoch time-stamp to a receiving device. The data packet makes its way through the network element to the receiving device and the time-stamp is used by the receiving device to calculate the difference between the epoch time of the receiver and the epoch time of the sender. Effectively, this procedure removes the unknown network element transit times from the equation and allows the devices to operate in a synchronized manner.

REFERENCES:
patent: 5812749 (1998-09-01), Fernandez et al.
patent: 6985975 (2006-01-01), Chamdani et al.
patent: 2002/0116468 (2002-08-01), Ishikawa
patent: 2004/0073718 (2004-04-01), Johannessen et al.
patent: 2005/0047445 (2005-03-01), Stepanov et al.
patent: 2005/0207387 (2005-09-01), Middleton et al.
patent: 2006/0056559 (2006-03-01), Pleasant et al.
patent: 1 657 619 (2006-07-01), None
patent: 2300789 (1996-11-01), None
patent: 2418113 (2006-03-01), None
GB Search Report dated Jul. 19, 2006.

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