Control method for shrouding wireless sensor network using node boundary

Abstract

The invention discloses a wireless sensor network covering and controlling method which adopt the node boundary coverage. The network covering and controlling method adopts a node dormancy sleep qualification criterion ERPC to carry out the dynamic sleep control on each node distributed in the wireless sensor network. According to the position information of the surrounding neighbor collected by each node, the node sleep qualification criterion ERPC is used to judge the sleep qualification, and the node which meets the condition enters into the sleep status. The network covering and controlling method of the invention utilizes the lower computational complexity and the necessary and sufficient condition to judge the redundancy of each node in the network, and realizes the coverage-configurable distributed network covering and controlling.

Description

Technical field [0001] The present invention relates to a method for controlling the working state of nodes in a wireless sensor network, more particularly, it refers to a network that uses node boundary coverage to determine the eligibility of a node to sleep, and dynamically controls the working state of any node and its neighbor nodes according to the determination result Coverage control method. Background technique [0002] Wireless Sensor Network (Wireless Sensor Network, WSN) is composed of a large number of wireless sensors deployed in the monitoring area, a multi-hop self-organizing network system formed through wireless communication (see figure 1 (Shown), its purpose is to cooperatively sense, collect and process the information of the sensed objects in the network coverage area, and send it to the user. Each wireless sensor is called a node in the wireless sensor network, and the node that can communicate with the node is called the neighbor node of the node. Each no...

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Problems solved by technology

[0005] The random deployment of wireless sensor networks leads to uneven distribution of nodes, and the sensing areas of multiple nodes often produce overlapping coverage areas (see figure 2 As shown, there are areas with oblique lines in the figure), which makes the coverage K of some sensing areas too high, resulting in the redundancy of wireless sensors set in the wireless sensor network, resulting in an increase in the construction cost of the wireless sensor network

Conversely, if the sensing areas of multiple nodes do not intersect each other or are separated by a certain distance, the target phenomenon (also called under-coverage blind spots) will be missed, and the monitoring area N cannot be reached. L×M purpose of monitoring

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