Industrial Internet of Things fault-tolerant time synchronization method and system based on block chain

Abstract

The invention discloses an industrial Internet of Things fault-tolerant time synchronization method and system based on a block chain. The method comprises the following steps of recording data: intra-cluster node time and cluster head node broadcast time,adopting a least square method to construct a cluster node clock model,predicting cluster node time according to the cluster node clock model, calculating the deviation between thecluster head node broadcast timeand the cluster head node prediction timebefore the cluster nodes are synchronized, when the deviation is smaller than a threshold value, enabling the cluster nodes to normally perform time synchronization, or otherwise, enabling the cluster nodes to initiate a consensus request in a broadcast mode,after the nodes in the cluster receive the consensus request broadcast packet, forming a block chain, and sharing time synchronization information of all cluster nodes by initiating a consensus request, broadcasting self time, publishing a result and achieving a consensus mechanism of consensus. The fault-tolerant time synchronization method based on the blockchain consensus mechanism can tolerate f cluster head nodes to fail orbe attacked, and effectively improves the reliability and security of an industrial Internet of Things time synchronization protocol in a complex environment.

Description

technical field [0001] The present invention relates to the technical field of Internet of Things network security, and more specifically, to a method and system for fault-tolerant time synchronization of the Industrial Internet of Things based on blockchain. Background technique [0002] Industrial Internet of Things applications have strict requirements on real-time and low power consumption, and the carrier sense multiple access CSMA protocol cannot meet this performance requirement. At present, most communication protocols in the industrial Internet of Things are based on time division multiple access TDMA protocols, such as WirelessHART, ISA100.11a and IEEE802.15.4e and other industrial wireless international standards. High-precision time synchronization is based on the core supporting technology in the time division multiple access TDMA protocol. The Industrial Internet of Things usually consists of thousands or even tens of thousands of wireless sensor nodes with li...

AI Technical Summary

Problems solved by technology

[0003] Industrial Internet of Things cluster head nodes sometimes fail, resulting in broadcasting wrong time synchronization information; there may be some malicious nodes in the Industrial Internet of Things cluster, when malicious nodes are elected as cluster heads, they destroy normal time synchronization by broadcasting wrong time information

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