Data monitoring method for wireless sensor network

Abstract

The invention relates to a Bubble data monitoring method for a wireless sensor network. According to the method, nodes and Sink nodes are arranged in the wireless sensor network, the nodes can generate Bubbles, the Bubbles are state monitoring messages broadcasted by the nodes within a range of the peripheral k jumps (K is a smaller value in terms of the network size), the Sink nodes are convergent nodes, namely special nodes capable of receiving all node transmission packets. According to the monitoring method, the center of the Bubbles is selected through a 'Grading' message primarily broadcasted among the network nodes, the selection of the center of the Bubbles meets the requirement that the two Bubbles which are closest to each other can not be overlapped too much, appropriate Bubbles are selected by utilizing the distance, whether abnormal data are generated in the Bubble area or not is detected, and the information about generation of the abnormal data is reported to the Sink nodes timely.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular relates to a wireless sensor network data monitoring method. Background technique [0002] The wireless sensor network contains a large number of sensor nodes, which can perceive the surrounding information. The information that can be sensed includes: ambient temperature, humidity and so on. Applications based on wireless sensor networks often require early warning processing of abnormal data sensed by some abnormal sensors, and abnormal sensory data often appear in a small range, usually on nodes within the k-hop range of a certain node . Therefore, we need to be able to sense these abnormal areas and monitor the sensed data. [0003] The most simple and intuitive monitoring method is that each node regularly reports the data obtained by its own sensor module to the Sink node. The Sink node regularly obtains all the current sensing data of the sensor nodes in the monitore...

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Problems solved by technology

[0006]The second method requires each node to periodically exchange status messages to the surrounding k hops, although it can reduce unnecessary nodes to report to the Sink node to a certain extent The number of messages, thereby reducing the energy consumption of message transmission between wireless sensor nodes, but still brings some redundant message exchange

For example, two nodes that are very close (less than k hops) broadcast status monitoring messages to the surrounding k hops at the same time, which will cause some nodes to repeatedly perceive and report data in a very short time interval, resulting in unnecessary energy consumption

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