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Wireless communication apparatus, wireless communication device, wireless communication method, and wireless communication program

A technology of wireless communication equipment and wireless communication device, applied in the field of wireless communication, can solve problems such as inconvenience of use

Active Publication Date: 2018-04-17
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It is inconvenient in terms of usability when using a special device or a licensed frequency to realize the wireless network

Method used

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  • Wireless communication apparatus, wireless communication device, wireless communication method, and wireless communication program
  • Wireless communication apparatus, wireless communication device, wireless communication method, and wireless communication program
  • Wireless communication apparatus, wireless communication device, wireless communication method, and wireless communication program

Examples

Experimental program
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Effect test

Embodiment approach 1

[0050] In the present embodiment and the following embodiments, a configuration is described in which, in an industrial network, real-time data is continuously transmitted and received by wireless communication at a fixed cycle between the master device and the slave device, and there is a case where there is a margin in the cycle Next, send and receive non-real-time data.

[0051] In this embodiment and the following embodiments, the cycle for transmitting and receiving data between the master and the slave is fixed.

[0052] Furthermore, in the present embodiment and subsequent embodiments, the real-time data period is set at the beginning of the cycle, and the non-real-time data period is set after the real-time data period.

[0053] By expanding and contracting the length of the real-time data period, fluctuations due to communication errors are absorbed.

[0054] In cases where there is time remaining in the period after the real-time data period completes, the remaining...

Embodiment approach 2

[0221] In this embodiment, a specific method of notifying the wireless slave device N300 of the number of real-time data and the number of non-real-time data held by the wireless slave device N300 to the wireless master device N201 will be described.

[0222] In this embodiment, the different priority queue notification processing unit 26 is provided in the wireless transmission unit 24 of the wireless slave device N300.

[0223] The different priority queue notification processing unit 26 performs a process of notifying the number of real-time data and the number of non-real-time data held by the storage unit 27 .

[0224] More specifically, the different priority queue notification processing unit 26 utilizes Figure 9 The Ack data sent in S203 notifies the processing of the number of real-time data and the number of non-real-time data counted by the different priority queue management unit 22 .

[0225] The different priority queue notification processing unit 26 does not ...

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Abstract

In a wireless master device (N201), a wireless scheduling unit (16) allocates a real-time data period within a communication cycle for performing wireless communication with a wireless slave device (N300) that transmits real-time data and non-real-time data which has lower priority than the real-time data, causes the wireless slave device (N300) to transmit the real-time data in the real-time dataperiod, and if the communication cycle is remaining upon completion of the transmission of the real-time data by the wireless slave device (N300), allocates the remaining communication cycle time toa non-real-time data period, and causes the wireless slave device (N300) to transmit the non-real-time data in the non-real-time data period.

Description

technical field [0001] The present invention relates to wireless communications. [0002] The present invention relates, for example, to wireless communication in industrial networks. Background technique [0003] As described in Non-Patent Document 1 below, in a network called a field network among industrial networks, a plurality of slave devices are connected to one master device. [0004] For example, the master device is a controller, and the slave devices are various I / O (Input / Output: input / output) devices or measuring devices. [0005] Furthermore, cyclic communication is performed between the master device and the plurality of slave devices at predetermined time intervals. [0006] On the other hand, for the purpose of reducing the installation cost of a wired network, wirelessization of the network is required. [0007] When wirelessization of the network is realized using a special device or a licensed frequency, it is inconvenient in terms of usability. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04W72/04H04W72/10H04W84/10
CPCH04W72/04H04W72/12H04W84/10H04W72/56H04W72/0446H04W72/569
Inventor 平井博昭
Owner MITSUBISHI ELECTRIC CORP
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