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A direct connection method between handheld device and field device in wia-pa network based on keep-alive frame

A technology for handheld devices and field devices, applied in electrical components, transmission systems, etc., can solve the problem of undefined connection methods for single-hop point-to-point communication between handheld devices and field devices, to ensure timely response and efficiency, and promote fast. Effectively, the effect of optimal allocation of access resources

Active Publication Date: 2018-04-27
CHONGQING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

However, the WIA-PA standard only defines the method for handheld devices to access the entire WIA-PA network as a network device, and does not define the connection method for direct single-hop point-to-point communication between handheld devices and field devices.

Method used

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  • A direct connection method between handheld device and field device in wia-pa network based on keep-alive frame
  • A direct connection method between handheld device and field device in wia-pa network based on keep-alive frame
  • A direct connection method between handheld device and field device in wia-pa network based on keep-alive frame

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the present invention will be further described:

[0024] In order to make the purpose of the present invention, technical solutions and advantages clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, and its specific implementation process is as follows:

[0025] figure 1 It is the improved Keep-alive command frame of the preferred embodiment of the present invention; the device survival command frame Keep-alive command frame format is: frame control field, frame sequence number, address field, auxiliary security header, command frame identifier, relative time slot number , channel number and frame check sequence FCS.

[0026] figure 2 "Handheld device connection request" DLSL command frame; the format of the handheld device connection request DLSL extended command frame is: DLSL frame control, DLSL command frame identifier 0x0f, and the payload of the ...

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Abstract

The invention discloses a method of direct connection between a WIA-PA network handheld device and a field device based on a Keep-alive frame. The method comprises steps: improvement and enhancement are carried out on a Keep-alive order frame periodically sent by the WIA-PA field device, and the handheld device realizes point-to-point communication with a to-be-connected field device through monitoring and using the Keep-alive frame; a use range of a super frame updating request and super frame updating response network layer order frame used by a router and a gateway limited in a WIA-PA standard is expanded to the field device for activation request and response to handheld connection backup super frame; and by using expansibility of a WIA-PA standard DLSL order frame, a DLSL order frame for a handheld device connection request of the handheld device and a handheld device connection response of the to-be-connected device is designed, and building of a direct communication relationship between the handheld device and the to-be-connected device is realized. Distribution of connection resources can be optimized effectively, and tradeoff between timely response and efficiency can be ensured.

Description

technical field [0001] The invention relates to the technical field of industrial wireless communication, in particular to a method for directly connecting a WIA-PA network handheld device and a field device based on a Keep-alive frame. Background technique [0002] In recent years, industrial wireless communication technology has been widely researched and applied in the field of industrial automation by virtue of its low cost, high reliability, high flexibility and mobility, and ease of system integration. The outstanding performance of industrial wireless communication technology in the field of industrial automation makes the formulation of industrial wireless standards another focus of the industry. With the continuous improvement of my country's industrial automation environment, with the support of the government and domestic universities, my country has independently formulated the WIA-PA industrial wireless standard based on the 802.15.4 underlying protocol, which i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08H04L29/06
CPCH04L43/106H04L67/145H04L67/147
Inventor 王恒徐国松王平
Owner CHONGQING UNIV OF POSTS & TELECOMM
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