Time Signal Distribution in Communication Networks Based on Synchronous Digital Hierarchy

Atsushi Imaoka, Masami Kihara

Abstract:	A new method that uses round-trip paths to accurately measure transmission delay for time synchronization is proposed. The performance of the method in Synchronous Digital Hierarchy networks is discussed. The feature of this method is that it separately measures the initial round-trip path delay and the variations in round-trip path delay. The delay generated in SDH equipment is determined by measuring the initial round-trip path delay. In an experiment with actual SDH equipment, the error of initial delay measurement was suppressed to 30ns.
Published in:	Proceedings of the 24th Annual Precise Time and Time Interval Systems and Applications Meeting December 1 - 3, 1992 Ritz-Carlton Hotel McLean, Virginia
Pages:	303 - 312
Cite this article:	Imaoka, Atsushi, Kihara, Masami, "Time Signal Distribution in Communication Networks Based on Synchronous Digital Hierarchy," Proceedings of the 24th Annual Precise Time and Time Interval Systems and Applications Meeting, McLean, Virginia, December 1992, pp. 303-312.
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