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Time signal distribution in communication networks based on synchronous digital hierarchyA 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.
Document ID
19940006517
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Imaoka, Atsushi
(Nippon Telegraph and Telephone Public Corp. Yokosuka, Japan)
Kihara, Masami
(Nippon Telegraph and Telephone Public Corp. Yokosuka, Japan)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: NASA. Goddard Space Flight Center, The 24th Annual Precise Time and Time Interval (PTTI) Applications and Planning Meeting
Subject Category
Communications And Radar
Accession Number
94N10989
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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