Time synchronization correction method for industrial wireless network based on tdma

An industrial wireless network and time synchronization technology, which is applied in the fields of wireless transmission technology, Internet of Things, and network technology, can solve problems such as the influence of random errors, achieve real-time improvement, achieve reliability, and reduce the amount of calculation.

CN104717737BActive Publication Date: 2018-10-16MICROCYBER CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-10-16

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Abstract

The invention relates to the field of industrial automation and wireless communication, and particularly discloses an industrial wireless network time synchronization correction method based on a TDMA. The high-accuracy time synchronization technology is invented by adopting the research on the TDMA communication mechanism and analyzing time synchronization between nodes in an industrial wireless network. The technology has the advantages of being high in time accuracy, small in calculation amount, small in data transmission load, and the like. The effects of the technology are verified through an independently-researched and independently-developed WH-M module and platforms such as a PC and a serial port debugging tool SSCOM32.exe under the error condition that the system clock is 24 M and the drifting error is 10 ppm, the technology can be obtained, 83% of time synchronization errors can be reduced, and the technology has universality for a TDMA network.
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Description

technical field

[0001] The invention relates to the fields of wireless transmission technology, network technology and the Internet of Things, in particular to a method for synchronizing node time based on industrial wireless networks. Background technique

[0002] With the development of control, computer, communication, network and other technologies, the field of information exchange and communication is rapidly covering from field equipment to various control fields, and the industrial wireless technology that emerged at the beginning of this century has triggered a major change in the traditional industrial measurement and control mode. Industrial wireless network is developed from the emerging wireless sensor network, which has the characteristics of low cost, low energy consumption and high flexibility. It has become another research hotspot after the industrial bus. Now the western industrial powers represented by the United States and Germany have invested heavily i...

Examples

Embodiment Construction

[0044] Below with the accompanying drawings Figure 1-5The present invention is described in further detail.

[0045] The TDMA-based industrial wireless network time synchronization correction method runs on the TDMA network platform. The TDMA network divides the time axis into superframes of a certain length, and each superframe is divided into several time slots;

[0046] Each node in the network is assigned a certain number of time slots to receive or send information within a superframe, and each network node has precise timing;

[0047] The clocks of each node in the network must be synchronized to achieve normal communication;

[0048] Clock synchronization, each node in the network realizes the same time of each node by exchanging messages, referring to the same node, and using algorithms to estimate the time of the other party.

[0049] Clock synchronization. In addition to completing the time synchronization process between nodes in the network, the nodes that need ...