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.
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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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