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Time synchronization using the Internet.

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Summary
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This study presents a novel network time synchronization algorithm, achieving 2 ms accuracy by modeling computer clocks and networks. This method enables precise clock synchronization for networked systems at reduced costs.

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Area of Science:

  • Computer Science
  • Network Engineering
  • Distributed Systems

Background:

  • Accurate time synchronization is crucial for networked computer systems.
  • Existing methods may be costly or lack precision for certain applications.

Purpose of the Study:

  • To introduce a new algorithm for synchronizing clocks on networked computers.
  • To leverage statistical modeling for enhanced time synchronization accuracy and cost-efficiency.

Main Methods:

  • Developed a statistical model for computer clocks and network latency.
  • Designed a frequency-lock loop disciplined by the statistical model.
  • Tested the algorithm by synchronizing a workstation to a remote time server (1200 km).

Main Results:

  • Achieved a root-mean-square (rms) time offset of 2 ms from Coordinated Universal Time (UTC).
  • Demonstrated the algorithm's effectiveness over a significant geographical distance.
  • Validated the statistical model's utility in parameter definition.

Conclusions:

  • The proposed algorithm offers a cost-effective solution for high-accuracy network time synchronization.
  • The underlying statistical modeling approach can be adapted for algorithms with varying accuracy and cost requirements.
  • This work advances the field of distributed system timekeeping.