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CLC number: TP393

On-line Access: 2013-10-08

Received: 2013-04-09

Revision Accepted: 2013-09-03

Crosschecked: 2013-09-16

Cited: 3

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE C 2013 Vol.14 No.10 P.766-776

http://doi.org/10.1631/jzus.C1300084


IEEE 1588 based time synchronization system for a seafloor observatory network


Author(s):  De-jun Li, Gang Wang, Can-jun Yang, Bo Jin, Yan-hu Chen

Affiliation(s):  State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   li_dejun@zju.edu.cn, wgseu@126.com

Key Words:  Seafloor observatory network, Junction box, IEEE 1588, Time synchronization


De-jun Li, Gang Wang, Can-jun Yang, Bo Jin, Yan-hu Chen. IEEE 1588 based time synchronization system for a seafloor observatory network[J]. Journal of Zhejiang University Science C, 2013, 14(10): 766-776.

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author="De-jun Li, Gang Wang, Can-jun Yang, Bo Jin, Yan-hu Chen",
journal="Journal of Zhejiang University Science C",
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T1 - IEEE 1588 based time synchronization system for a seafloor observatory network
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DOI - 10.1631/jzus.C1300084


Abstract: 
An IEEE 1588 based application scheme was proposed to achieve accurate time synchronization for a deep seafloor observatory network based on the communication topological structure of the Zhejiang University Experimental and Research Observatory. The principles of the network time protocol (NTP) and precision time protocol (PTP) were analyzed. The framework for time synchronization of the shore station, undersea junction box layer, and submarine science instrument layer was designed. NTP and PTP network signals were decoded by a PTP master clock on a shore station that receives signals from the Global Positioning System and the BeiDou Navigation Satellite System as reference time sources. These signals were remotely transmitted by a subsea optical–electrical composite cable through an Ethernet passive optical network. Accurate time was determined by time synchronization devices in each layer. Synchronization monitoring experiments performed within a laboratory environment indicated that the proposed system is valid and has the potential to realize microsecond accuracy to satisfy the time synchronization requirements of a high-precision seafloor observatory network.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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