基于环形海底观测网络的时间同步系统研究
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摘要
分析研究环形海底观测网络的时间同步系统的基本架构和建模原型。在此基础上,运用OMNeT++仿真软件对该系统的各级网络传输设备的时钟模式方案展开仿真研究和验证。结果表明,岸基站和主接驳盒的传输设备应分别支持端到端透明时钟模式和边界时钟模式,次接驳盒的传输设备可以不安装PTP时钟模块。此方案下系统所需成本较少且满足亚微秒级精度的要求,同时降低了网络负载流量和不对称传输延迟对时间同步性能的影响。
We analyzed and studied the basic architecture and modeling prototype of the time synchronization system in the annular submarine observation network. On this basis, the clock mode scheme of the network transmission equipment at all levels in the system was simulated and verified by using OMNeT++ simulation software. The results show that the transmission equipment of the shore-based station and the primary junction box should support the end-to-end transparent clock mode and the boundary clock mode respectively. And the transmission equipment of the secondary junction box does not need to install the PTP clock module. In this scheme, the system requires less cost and meets the requirements of sub-microsecond precision, while reducing the impact of network load flow and asymmetric transmission delay on the performance of time synchronization.
We analyzed and studied the basic architecture and modeling prototype of the time synchronization system in the annular submarine observation network. On this basis, the clock mode scheme of the network transmission equipment at all levels in the system was simulated and verified by using OMNeT++ simulation software. The results show that the transmission equipment of the shore-based station and the primary junction box should support the end-to-end transparent clock mode and the boundary clock mode respectively. And the transmission equipment of the secondary junction box does not need to install the PTP clock module. In this scheme, the system requires less cost and meets the requirements of sub-microsecond precision, while reducing the impact of network load flow and asymmetric transmission delay on the performance of time synchronization.
引文
[1] 王潋, 王红霞, 孙洋. 新型海底观测网的研究[J]. 信息通信, 2015(8):56-58.
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[5] Kawaguchi K, Araki E, Kogure Y, et al. Development of DONET2-Off Kii chanel observatory network[C]//Underwater Technology Symposium. IEEE, 2013.
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[9] 杨帆,王红霞,余贝,等.水下信息传输网中OTN与SDH技术集成研究[J].光通信技术,2016,40(8):4-7.
[10] 余贝.缆系水下信息传输网络传输性能优化研究[D].武汉:海军工程大学,2017.
[11] Puhm A, Kramer M, Moosbrugger P, et al. Problems and solutions for refitting a sensor network with IEEE1588 clock synchronisation[C]//Emerging Technology and Factory Automation. IEEE, 2015.
[2] 余贝, 王红霞, 谢杰荣. 基于可靠性的海底观测网传输网络拓扑结构研究[J]. 光纤与电缆及其应用技术, 2018(1):25-27.
[3] Milevsky A, Walrod J. Development and test of IEEE 1588 Precision Timing Protocol for ocean observatory networks[C]//Oceans. IEEE, 2009.
[4] Yokobiki T, Eiichiro E, Araki A, et al. Time-synchronization system for cabled observation systems[C]//The Seventeenth International Offshore and Polar Engineering Conference, 1-6 July, Lisbon, Portugal, 2007.
[5] Kawaguchi K, Araki E, Kogure Y, et al. Development of DONET2-Off Kii chanel observatory network[C]//Underwater Technology Symposium. IEEE, 2013.
[6] Rio J D, Toma D M, Shariat-Panahi S, et al. Smart IEEE-1588 GPS clock emulator for cabled ocean sensors[J]. IEEE Journal of Oceanic Engineering, 2014, 39(2):269-275.
[7] Lentz S, Lecroart A. Precision timing in the NEPTUNE Canada network[C]. Oceans. IEEE, 2009.
[8] Li D, Wang J, Zhang Z, et al. Research and implementation of an IEEE 1588 PTP-based time synchronization system for Chinese experimental ocean observatory network[J]. Marine Technology Society Journal, 2015, 49(1):47-58.
[9] 杨帆,王红霞,余贝,等.水下信息传输网中OTN与SDH技术集成研究[J].光通信技术,2016,40(8):4-7.
[10] 余贝.缆系水下信息传输网络传输性能优化研究[D].武汉:海军工程大学,2017.
[11] Puhm A, Kramer M, Moosbrugger P, et al. Problems and solutions for refitting a sensor network with IEEE1588 clock synchronisation[C]//Emerging Technology and Factory Automation. IEEE, 2015.