

FOLLOWUS
State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
[ "De-jun LI, E-mail: li_dejun@zju.edu.cn" ]
[ "Gang WANG, E-mail:wgseu@126.com" ]
Received:09 April 2013,
Revised:2013-;9-16,
Published:2013-10
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De-jun LI, Gang WANG, Can-jun YANG, et al. IEEE 1588 based time synchronization system for a seafloor observatory network[J]. Frontiers of Information Technology & Electronic Engineering, 2013, 14(10): 766-776.
De-jun LI, Gang WANG, Can-jun YANG, et al. IEEE 1588 based time synchronization system for a seafloor observatory network[J]. Frontiers of Information Technology & Electronic Engineering, 2013, 14(10): 766-776. DOI: 10.1631/jzus.C1300084.
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.
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