Data redundance sending method for industrial wireless network

An industrial wireless network and data redundancy technology, applied in network topology, wireless communication, network traffic/resource management, etc., can solve problems such as inability to prevent data from being tampered with, inability to guarantee communication reliability, and inability to send data redundantly

Inactive Publication Date: 2010-10-13
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Another purpose of the present invention is that the double-layer topology applied in the industrial field environment cannot prevent data from being tampered with during transmission, cannot guarantee the real-time performance of long data transmission, cannot perform differentiated redundant transmission of data, and cannot To ensure the reliability of communication, a method of data redundancy in industrial wireless networks is proposed, which can dynamically adjust the redundant transmission of data, thereby ensuring the reliability of communication

Method used

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  • Data redundance sending method for industrial wireless network
  • Data redundance sending method for industrial wireless network
  • Data redundance sending method for industrial wireless network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Access Point Slot Redundancy

[0029] Access point time slot redundancy is a star network in the industrial wireless network topology to achieve redundant data transmission. I send seven stages.

[0030] 1) into the cluster

[0031] A star network constitutes a cluster, and the communication in the whole cluster shares a channel. The industrial wireless network adopts TDMA to avoid conflicts. The field device can only obtain the access right of the channel when the communication time slot of its own cluster arrives, so as to realize the communication with the cluster head. Communication. like figure 1 , after the initialization of the star network is completed, the cluster head has assigned a corresponding intra-cluster address to each field device that enters the network. The cluster address of the cluster head is 0, and the cluster addresses of the newly added field devices are allocated from 1. It is specified that the intra-cluster address correspond...

Embodiment 2

[0048] Example 2: Routing and sending redundancy

[0049] Routing redundancy is a method of data redundancy in MESH networks, such as figure 2 shown. The routing sets the data redundancy N according to the data importance K of the received data and the redundant routing table saved on the routing. First, it is stipulated that the data importance K only takes values ​​in the set {1, 2, 3}, and the redundancy N is divided into three levels: low, medium, and high. When K=1 or only one routing table is stored on the route, the router sets the redundancy to low, N=1, that is, the data is ordinary data, and no redundant transmission is performed; when K=2 and there are multiple Redundant routing table, the redundancy is medium at this time. If the number n of redundant routing tables on the route is greater than K, N=K, that is, when the data to be sent is generally important data, even if there are multiple redundant paths on the route, the route will only select 2 of them for ...

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Abstract

The invention relates to a data redundancy sending method in an industrial wireless network, which comprises the steps of: detecting key degree Q of data in a star network firstly, realizing redundancy sending of key data, then determining redundancy rate N of data sending according to importance K of transmission data of field devices and redundancy routing table number stored by a router, and finally realizing N redundancy sending of the data in an MESH network. The method not only realizes redundancy sending of key data, avoids communication resource waste caused by sending common data repeatedly, prevents data loss and alteration, and provides guarantee for reliable transmission of the whole network data, but also solves the problem of data delay caused by long data incapable of beingsent over in a time slot.

Description

technical field [0001] The invention belongs to an industrial wireless network communication technology, in particular to a method for redundant data transmission in an industrial wireless network. Background technique [0002] Industrial wireless technology is a wireless communication technology for information exchange between devices. It is an extension and improvement of the existing industrial communication technology in the direction of industrial application. It will lead to the transformation of the traditional industrial measurement and control mode and lead the industrial automation system to low-cost. , High reliability and high flexibility. With the advent of the wireless boom, industrial wireless communication technology has developed rapidly. In industrial wireless network communication, extremely high reliability is required. Any data loss from field devices will lead to unpredictable accidents in the industrial field, especially the unreliable transmission o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04H04W84/18H04L1/22H04L29/12
Inventor 杨颂华张丹
Owner SOUTHWEST UNIV
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