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http://dx.doi.org/10.3745/KIPSTC.2009.16C.5.637

Performance Analysis of Synchronization Clock with Various Clock States Using Measured Clock Noises in NG-SDH Networks  

Lee, Chang-Ki (위덕대학교 정보통신공학과)
Publication Information
The KIPS Transactions:PartC / v.16C, no.5, 2009 , pp. 637-644 More about this Journal
Abstract
A study about performance analysis of synchronization clock using measured clock noises is required. Therefore this paper executed the study for performance analysis of synchronization clock and acquirement of maximum number of network node with various clock states using measured clock noises in NG-SDH networks. Also this paper generated a suitable clock model using measured clock noises, and carried out simulations with various clock states. Through the simulation results, maximum numbers were 80 or more network nodes in normal state, and were below 37 nodes in short-term phase transient(SPT) state, and were 50 or more in long-term phase transient(LPT) state. Accordingly this study showed that maximum numbers to meet ITU-T specification were below 37 network nodes in three clock states. Also this study showed that when SPT or LPT states occur from NE network before DOTS system, synchronization source must change with other stable synchronization source of normal state.
Keywords
Synchronization Clock; Clock Noise; NG-SDH;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Dirceu Cavendish et al., “Next Transport Services for Next Generation SONET/SDH Systems,” IEEE Communications Magazine, pp.80-7, May, 2002.   DOI   ScienceOn
2 한국전기통신공사, 디지털 클럭 공급장치(DOTS) 설명서, 1988.
3 이창기, “동기망과 동기식 전송망에서의 동기클럭 단기안정 특성 분석,”한국정보처리학회 논문지, 제8-C권, 제3호, pp299-309, 2001년 6월.   과학기술학회마을
4 이창기, “NG-SDH 망동기에 관한 연구,” 한국전자통신연구원 최종연구보고서, 2004년 11월.
5 이창기, “동기망과 전송망에서의 동기클럭 성능분석을 위한 시뮬레이터 개발,” 한국정보처리학회 논문지, 제11-C권, 제1호, pp.123-134, 2004년 2월.   과학기술학회마을   DOI
6 양충열, 고제수, 이창기, 김환우, “광전송플랫폼에서의 망동기 장치 구현과 광전송망에 미치는 원더의 영향분석,” 한국통신학회 논문지, 제32권 제7호, pp.678-685, 2007년 7월.   과학기술학회마을
7 ITU-T Draft Recommendation G.7042, “Link capacity adjustment scheme(LCAS) for virtual concatenated signals,” August, 2002.
8 ITU-T Recommendation G.783, “Characteristics of synchronous digital hierarchy (SDH) equipment functional blocks,” 1997.
9 이창기, “NG-SDH 망에서 다양한 클럭상태 하에서의 동기클럭 성능분석에 관한 연구,” 한국정보처리학회 논문지, 제13-C권, 제3호, pp303-310, 2006년 6월.   과학기술학회마을   DOI
10 ITU-T G.707/Y.1322, “Network node interface for the synchronous digital hierarchy (SDH),” August 2002.
11 ITU-T Draft Recommendation G.7041, “Generic framing procedure(GFP),” December, 2001
12 ITU-T Recommendation G.810, “Definitions and terminology for synchronization networks,” Sept., 1997.
13 ITU-T Recommendation G.811, “Timing characteristics of primary reference clock,” Sept., 1997.
14 ITU-T Recommendation G.812, “Timing requirements of slave clocks suitable for use as node clocks in synchronization networks,” March, 2005.
15 ITU-T Recommendation G.813, “Timing characteristics of SDH equipment slave clocks(SEC),” March 2003
16 ANSI Revised Draft T1.101, “Synchronization interface standard,” 1999
17 G. Garner, “Noise accumulation in synchronization reference chains,” Contribution to T1 Standard Project, T1X1. 3 / 95-044, 1995.
18 ANSI Draft T1.105.09, “Network element timing and synchronization,” 1995.