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一种面向层次化异构网络的时间同步方法
Alternative TitleTime synchronization method oriented to hierarchical heterogeneous network
曾鹏; 于海斌; 李栋; 王照伟; 汪金涛; 张延宇
Department工业控制网络与系统研究室
Rights Holder中国科学院沈阳自动化研究所
Patent Agent沈阳科苑专利商标代理有限公司 21002
Country中国
Subtype发明
Status有权
Abstract本发明涉及工业实时应用的异构网络技术,具体地说是一种面向层次化异构网络的时间同步方法。基于层次化的思想,构建由Internet骨干网、无线mesh回程网以及现场以太子网组成的三层异构网络。基于IEEE1588的时间同步原理以及硬件时戳概念,采用One_step时间同步机制,减少网络中1/4的同步信息包传输,降低网络负载,引入无线网络的硬件时戳,提高时间同步精度。基于以上内容,设计位于无线mesh回程网和本地以太子网接口处的边界时钟,协调二者之间的时间同步,解决了网络协议不同、同步信息交换及端口不一致所造成的异构网络时间同步精度低问题。最后采用分层同步机制实现全网时间同步。本发明基于现有的IEEE1588和IEEE802.11协议,不引入额外的协议开销。
Other AbstractThe invention relates to a heterogeneous network technology of industrial real-time application, in particular to a time synchronization method oriented to a hierarchical heterogeneous network. A three-layer heterogeneous network consisting of an Internet backbone network, a wireless mesh backhaul network and a field Ethernet sub-network is constructed on the basis of hierarchical thought. An One_step time synchronization mechanism is adopted on the basis of the time synchronization principle of IEEE1588 and a hardware timestamp concept, so that a quarter of synchronization information packet transmission in a network is reduced; the network load is reduced; a hardware timestamp of a wireless network is introduced; and the time synchronization accuracy is increased. A boundary clock positioned on an interface between the wireless mesh backhaul network and a local Ethernet sub-network is designed on the basis of the abovementioned content in order to coordinate the time synchronization between the wireless mesh backhaul network and the local Ethernet sub-network, so that the problem of low time synchronization accuracy of the heterogeneous network due to different network protocols, synchronization information exchange and port inconsistency is solved. At last, whole-network time synchronization is realized by adopting a hierarchical synchronization mechanism. On the basis of existing IEEE1588 and IEEE802.11 protocols, extra protocol overhead is not introduced.
PCT Attributes
Application Date2013-12-26
2015-07-01
Date Available2018-03-27
Application NumberCN201310728987.4
Open (Notice) NumberCN104754722A
Language中文
Contribution Rank1
Document Type专利
Identifierhttp://ir.sia.cn/handle/173321/17083
Collection工业控制网络与系统研究室
Affiliation中国科学院沈阳自动化研究所
Recommended Citation
GB/T 7714
曾鹏,于海斌,李栋,等. 一种面向层次化异构网络的时间同步方法[P]. 2015-07-01.
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