Title :
Reference signal generation and management in SDH-WDM-based equipment and networks
Author :
Kihara, Masami ; Hisadome, Kenji
Author_Institution :
NTT Network Innovation Lab., Kanagawa, Japan
Abstract :
This paper describes a new system that functions as both conventional SDH Equipment Clock (SEC) and a new reference signal generation and management device. The system is basically intended for new telecommunication networks based on a combination of Synchronous Digital Hierarchy (SDH) and Wavelength Division Multiplex (WDM) techniques. The new processor-based system is composed of decision-making and selection circuits for reference signals, and advanced 155 MHz phase-locked oscillators (PLO) for generating the SDH frequency, IPPS time signal. This configuration can also achieve highly reliable signal generation and autonomous management independently of conventional network operation systems
Keywords :
clocks; computerised instrumentation; reference circuits; signal generators; synchronous digital hierarchy; telecommunication computing; timing circuits; transfer standards; wavelength division multiplexing; 155 MHz; IPPS time signal; SDH; SDH equipment clock; SDH frequency; SDH-WDM-based equipment; Synchronous Digital Hierarchy; WDM; Wavelength Division Multiplexing; autonomous management; decision-making circuits; phase-locked oscillators; reference signal; reference signal generation; selection circuits; telecommunication networks; Clocks; Intelligent networks; Optical fiber networks; Optical filters; Optical network units; Repeaters; Routing; Signal generators; Synchronous digital hierarchy; Wavelength division multiplexing;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.840766
