Method for adjusting clocks of multiple data processors to a com

Details Method for adjusting clocks of multiple data processors to a com Method for adjusting clocks of multiple data processors to a com

1988-01-26

1989-11-21

Griffin, Robert L.

Pulse or digital communications

Spread spectrum

Direct sequence

455 69, 364569, H04L 700

Patent

active

048827398

ABSTRACT:
A master clock is situated at a central data gathering station, and slave clocks are situated at one or more (functionally or spatially) remote stations. Time signals are exchanged between the master clock at the central station and each slave clock at the corresponding remote station. From these signals (i) the transmission time between the central station and the corresponding remote station is determined, and (ii) the ratio between the frequencies of the central station master clock and the corresponding remote station slave clock is determined. The transmission time and clock ratio so determined are averaged between successive determinations to provide improved accuracy. The transmission time value is used to set the slave clock to a reference value accurately corresponding to the time kept by the master clock; and thereafter the clock ratio value is used to insure that the slave clock is incremented at a rate corresponding to the frequency of the oscillator in the master clock. If desired, the master clock can be synchronized to a reference time which is the average of the reference times of the various clocks, and/or to a frequency which is the average of the frequencies of the oscillators in the various clocks.

REFERENCES:
patent: 3128465 (1964-04-01), Brilliant
patent: 3250896 (1966-05-01), Perkinson et al.
Richard Wallace; "Time Source Synchronizes Computers in Networks"; p. 24; Electronic Engineering Times; 9/21/87.
D. L. Mills; "Network Time Protocol"; M/A-Com Linkabit; 9/85.
D. L. Mills; "Experiments in Network Clock Synchronization"; M/A--Com Limkabit; 9/85.

Affiliated with

Also associated with

Rating

Method for adjusting clocks of multiple data processors to a com does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for adjusting clocks of multiple data processors to a com, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for adjusting clocks of multiple data processors to a com will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1430136