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Factory automation wireless network time synchronizing method based on time division multiple address (TDMA)

A factory automation, wireless network technology, applied in the communication between multiple stations, time-division multiplexing systems, electrical components, etc., can solve problems such as the inability to directly apply WLAN, and improve effective throughput and flexibility. , the effect of reducing the difficulty of maintenance and management

Active Publication Date: 2013-06-26
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

However, PTP is oriented to wired Ethernet and cannot be directly applied to WLANs based on the IEEE 802.11 standard

Method used

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  • Factory automation wireless network time synchronizing method based on time division multiple address (TDMA)
  • Factory automation wireless network time synchronizing method based on time division multiple address (TDMA)
  • Factory automation wireless network time synchronizing method based on time division multiple address (TDMA)

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] The method of the invention comprises the following steps: forming a factory automation wireless network into a star network based on the IEEE 802.11 single-hop BSS structure; realizing time synchronization of the factory automation wireless network based on a TDMA mechanism.

[0034] Such as figure 1 As shown, the factory automation wireless network based on the IEEE 802.11 single-hop BSS structure of the present invention is a star structure. The nodes in the factory automation wireless network include: access point AP, redundant AP, field node and (or) hand-held node. Among them, the field nodes and (or) handheld nodes are responsible for collecting various parameters related to factory automation; the access point AP is responsible for forwarding the data collected by the field nodes and (or) handheld nodes to the main control comp...

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Abstract

The invention relates to the industrial wireless network technology, in particular to a factory automation wireless network time synchronizing method based on time division multiple address (TDMA). The factory automation wireless network time synchronizing method is based on the institute of electrical and electronic engineers (IEEE) 802.11 standard and the TDMA mechanism, by adopting a hardware timestamp printing method and calculating the timestamp values of a receiving side and a dispatching side, time deviation caused by processing delay of a protocol stack, delay from a physical layer interface to a wireless media interface (antenna) and delay of information transmission in the air can be eliminated, and accurate time synchronization of a factory automation wireless network can be achieved. On the basis that no additional expenses can be caused, the factory automation wireless network time synchronizing method remarkably improves the time synchronization accuracy of the factory automatic wireless network based on the IEEE 802.11 single-hop network, meets severe requirements on transmission speed, reliability, instantaneity and network scale of the factory automatic network and achieves the aims of being high in synchronizing accuracy, high in efficiency, low in expense, easy to achieve and the like.

Description

technical field [0001] The invention relates to industrial wireless network technology, in particular to a TDMA-based factory automation wireless network time synchronization method. Background technique [0002] Industrial wireless network technology is another hot technology in the field of industrial control after fieldbus. It is a revolutionary technology that reduces the cost of industrial measurement and control systems and improves the application range of industrial measurement and control systems. It is also a new growth point for industrial automation products in the next few years. Industrial wireless network technology is oriented to short-range, low-rate information interaction between devices, suitable for use in harsh industrial site environments, and has strong anti-interference ability, ultra-low energy consumption, real-time communication and other technical features. Functional expansion and technological innovation in the direction, and finally transforme...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04B7/26
Inventor 梁炜杨雨沱张晓玲于海斌
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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