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Wireless communication device, wireless communication system, and wireless communication method

A wireless communication device and wireless communication technology, applied in wireless communication, synchronization device, network topology, etc., can solve problems such as noise, and achieve the effect of reducing the impact of periodic noise

Active Publication Date: 2018-09-18
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is well known that among industrial equipment used in industrial networks, some equipment has power supplies, fans, motors, etc., and the power supply, fans, motors, etc. will generate noise for a certain period of time.

Method used

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  • Wireless communication device, wireless communication system, and wireless communication method
  • Wireless communication device, wireless communication system, and wireless communication method
  • Wireless communication device, wireless communication system, and wireless communication method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] figure 1 It is a diagram showing a configuration example of an industrial network including the wireless communication system according to Embodiment 1 of the present invention. The industrial network has: the industrial master device N1 as the controller of the industrial network; the industrial slave devices N101, N102, N103, ..., N100+m as various IO devices and measuring instruments in the industrial network; The wireless master device N201, the wireless master device N201 is a wireless communication device as a wireless master station that is wired with the industrial master device N1 and carries out wireless communication with the industrial slave devices N101, N102, N103, ..., N100+m side; And wireless slave devices N301, N302, N303,..., N300+m, the wireless slave devices N301, N302, N303,..., N300+m are used as a 1-to-1 mode with industrial slave devices N101, N102, N103, ..., N100+m is a wireless communication device of a wireless substation connected by wire ...

Embodiment approach 2

[0076] In Embodiment 1, the delay control unit 14 of the wireless master device N201 and the transmission timing control units 26 of the wireless slave devices N301 to N303 perform control such that the transmission timing is delayed for CMDs #1 to #3. However, the control method of the transmission timing is not limited to this.

[0077] Image 6 It is a figure which shows the signal transmission / reception timing in each apparatus in the industrial network including the wireless communication system of Embodiment 2 of this invention. The configuration of the wireless communication system is the same as that of the first embodiment. In the wireless slave devices N301 to N303, as long as the timing of sending SYNC to the industrial slave devices N101 to N103 does not conflict with the timing of sending CMD#1 to #3 to the industrial slave devices N101 to N103, the CMD#1 ~#3 does not control the transmission timing, that is, transmits to the industrial slave devices N101 to N10...

Embodiment approach 3

[0080] In Embodiment 1, the delay control unit 14 of the wireless master device N201 and the transmission timing control units 26 of the wireless slave devices N301 to N303 perform control such that the transmission timing is delayed for CMDs #1 to #3. However, the control method of the transmission timing is not limited to this. A method different from Embodiment 2 will be described.

[0081] Figure 7 It is a figure which shows the signal transmission / reception timing in each apparatus in the industrial network including the wireless communication system of Embodiment 3 of this invention. The configuration of the wireless communication system is the same as that of the first embodiment. Only the delay control unit 14 of the wireless master device N201 may give such delay time to the CMDs #1 to #3 that the delay time is set to Figure 4 The delay times for CMDs #1 to #3 in the wireless master device N201 shown are the same as Figure 4 The shown wireless slave devices N30...

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PUM

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Abstract

A wireless communication device capable of reducing the influence of periodic noise in fixed-period communication based on wireless communication is obtained. The wireless master device (N201) serving as a wireless master station performs wireless communication with the wireless slave device (N301) serving as a wireless slave station, wherein a delay control unit (14) is provided that randomly transmits the input signal every transmission cycle A delay time is set; and a wireless transmission unit (13) delays a signal according to the delay time and transmits it to a wireless slave device (N301).

Description

technical field [0001] The present invention relates to a wireless communication device, a wireless communication system, and a wireless communication method used in an industrial network. Background technique [0002] Conventionally, in an industrial network and a field network, a controller is a master device, and various IO (Input Output) devices and measuring instruments are slave devices, and are connected in a one-to-many manner. Cyclic communication is performed at preset time intervals between the master and multiple slaves. The following Non-Patent Document 1 discloses such a technique. Furthermore, in a motion control network, since a plurality of motors are driven to operate, more accurate timing synchronization is required. [0003] In an existing industrial network premised on fixed-period communication, if it can be used without changing existing industrial equipment by connecting a wireless device to the outside, installation costs and wiring costs can be re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W84/20
CPCH04W84/10H04W56/0015H04W84/20H04W56/0045H04W56/009H04W72/12
Inventor 平井博昭
Owner MITSUBISHI ELECTRIC CORP