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 the inability to prevent data from being tampered with, the inability to transmit data redundantly, and the inability to ensure communication reliability.

Inactive Publication Date: 2009-08-05
SOUTHWEST UNIVERSITY
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  • Abstract
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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

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Embodiment 1

[0028] Embodiment 1: Access Point Slot Redundancy

[0029] Access point time slot redundancy is the redundant transmission of data in a star network in the industrial wireless network topology, which is divided into clustering, dormancy, preparation phase, sending data, calculating Q value, applying for network address, completing data redundancy. I sent seven stages.

[0030] 1) into the cluster

[0031] A star network constitutes a cluster, and the communication within the entire cluster shares one channel. The industrial wireless network uses TDMA to avoid conflicts. Only when the communication time slot of its own cluster arrives, the field devices can obtain the access right of the channel, realizing the communication with the cluster head. Communication. Such as figure 1 , after the initialization of the star network is completed, the cluster head has allocated a corresponding intra-cluster address for each network-connected field device. The intra-cluster address of...

Embodiment 2

[0048] Example 2: Routing and sending redundancy

[0049] Routing and sending redundancy is a method of data redundancy in the MESH network, such as figure 2 shown. The router sets the data redundancy N according to the importance K of the received data and the redundant routing table saved on the router. Firstly, it is stipulated that the 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 saved on the route, the routing will set the redundancy to be 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 o...

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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 being sent over in a time slot.

Description

technical field [0001] The invention belongs to the industrial wireless network communication technology, in particular to a method for redundant data transmission in the industrial wireless network. Background technique [0002] Industrial wireless technology is a wireless communication technology oriented to information interaction between devices. It is an expansion and improvement of the existing industrial communication technology in the direction of industrial application. , high reliability and high flexibility. With the arrival of the wireless upsurge, 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 of key information, which will bring disastrous consequences. For wireless networks, data redundancy is an effective method to impro...

Claims

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Application Information

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