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
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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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