Method for detecting wireless sensor network node malfunction

Abstract

The invention relates to an improved DFD wireless sensor network code failure detecting method. The current detecting method has a low detecting precision. On the basis of obtaining the detecting result and initial detecting state of the neighbor nodes, the inventive method judges the node state normal if detected nodes, whose detecting result is zero, is more than the nodes whose detecting result is one in the nodes whose initial detecting result is possibly normal in the neighbor nodes to any node; contrarily, it is failed. The method detects the failure code by the data exchange and inter-detection between the neighbor nodes. The technology scheme is suitable for the sensor network with a few network nodes and the neighbor codes to be detected, and high failure rate, which largely improves failure detecting precision.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an improved wireless sensor network node failure detection method, which detects the failure node through data exchange and mutual testing among neighbor nodes in the network. Background technique [0002] The wireless sensor network is a multi-hop self-organizing network system composed of a large number of low-cost miniature sensor nodes deployed in the monitoring area through wireless communication. It has the characteristics of multi-function and low energy consumption. Its purpose is to sense, collect and process Information about objects in the area covered by the network and sent to observers for processing and analysis. As one of the key technologies of wireless sensor networks, node fault detection is an indispensable link in most application fields of wireless sensor networks. [0003] Wireless sensor network integrates sensor, embedded computing, modern n...

AI Technical Summary

Problems solved by technology

[0007] (3) It is very troublesome and unrealistic to manually detect whether each node is normal;

[0008] (4) Faulty solar terms will generate wrong data, so that the monitoring center cannot obtain correct monitoring information, and in severe cases, the entire network will collapse;

Among them, the DFD wireless sensor network node fault detection method has the following disadvantages: when the number of neighbor nodes of the node to be detected is small or the probability of node failure in the network is high, the fault detection accuracy will decrease rapidly; Only when there are a large number of sensor networks can there be higher fault detection accuracy

The root cause is that the DFD node failure detection algorithm correctly detects the node whose actual state is normal as "normal" condition is too harsh

Moreover, when the number of neighbor nodes of the node to be detected is small or the node failure rate of the network is large, the accuracy of node failure detection will decrease rapidly

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