Time Signal Distribution in Communication Networks Based on Synchronous Digital Hierarchy

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 &lay measurement was suppressed to 30ns.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1992
Accession Number
ADA501935

Entities

People

  • Atsushi Imaoka
  • Masami Kihara

Organizations

  • NTT, Inc.

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Clocks
  • Communication Networks
  • Control
  • Generators
  • Hierarchies
  • Measurement
  • Multiplexing
  • Networks
  • Optical Fibers
  • Phase Control
  • Signal Generators
  • Terminals
  • Time Interval Counters
  • Time Intervals
  • Time Signals
  • Transmission Lines

Fields of Study

  • Computer science
  • Physics

Readers

  • Computational Modeling and Simulation
  • Positioning, Navigation, and Timing (PNT) Technology.