Process for time synchronization of at least two clocks in a...

Details Process for time synchronization of at least two clocks in a... Process for time synchronization of at least two clocks in a...

2007-03-20

2007-03-20

Perveen, Rehana (Department: 2116)

Electrical computers and digital processing systems: support

Synchronization of plural processors

C713S400000, C375S354000

Reexamination Certificate

active

10866097

ABSTRACT:
A method for time synchronisation of at least two clocks contained in a multiprocessor system, wherein a first clock having a predetermined clock rate generates consecutive respective time-stamps indicating the time and at least one second clock which has an adjustable clock rate is synchronised with the first clock at certain time intervals. At predetermined time intervals the relative temporal position of flanks of the first clock and of the second clock representing the transition between two consecutive time-stamps is recorded. From the change in the relative temporal position of the transition flanks of the first clock and of the second clock a correction factor representing the time deviation between the first clock and the second clock is determined. Using the correction factor representing the time deviation between the first clock and the second clock the clock rate of the second clock is readjusted in the sense of a diminution of the time deviation between the first clock and the second clock. The recording, determination and readjustment are repeated.

REFERENCES:
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patent: 5875320 (1999-02-01), Gu
patent: 5896524 (1999-04-01), Halstead et al.
patent: 6199169 (2001-03-01), Voth
patent: 2003/0179780 (2003-09-01), Walker et al.
patent: WO 02/080440 (2002-10-01), None
Li-Shen Juhn et al., “Achieve High Acuracy of Network Time with Proper Parameters”, Computer Communications, 1999, pp. 419-431, vol. 22, Elsevier Science B.V.

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