Depth adjustment method used for underwater sensor network node and based on Thiessen diagram

Abstract

The invention discloses a depth adjustment method used for underwater sensor network nodes and based on a Thiessen diagram. A plurality of underwater sensors nodes are dripped on a target water area water surface in a random mode and in uniform distribution probability, and a collection node is arranged in the middle of the target water area water surface and serves as a management control center of the underwater sensor nodes in the water area. The Thiessen diagram of the underwater sensor nodes in various water depth layers is generated in a layer-by-layer mode through the collection node from a target water area water surface layer, through calculation of area of a Thiessen polygon corresponding to the underwater sensor nodes, closeness degree of the underwater sensor nodes in the horizontal direction is inspected, and the overstocked nodes in a horizontal layer are subsided to a next layer until to the bottom of the target water area. According to the facts that the nodes are arranged in a random dripped mode and an underwater coverage area is enlarged through subsiding mechanism of the nodes, the depth adjustment method used for the underwater sensor network nodes and based on the Thiessen diagram reduces arrangement cost of an underwater sensor network.

Description

technical field [0001] The invention relates to node deployment and coverage control of underwater wireless sensor networks (UWSNs), in particular to a method for adjusting the depth of underwater sensor network nodes based on a Thiessen diagram. Background technique [0002] At present, Underwater Wireless Sensor Networks (UWSNs) have attracted great attention from governments, research institutions and enterprises in various countries. The underwater sensor nodes can carry out medium and long-term underwater replacement, target detection, and monitoring of marine hydrological environmental elements in the area covered by the network. At the same time, in the huge anti-submarine warfare network composed of multi-base and outboard distributed sensor systems in the future, underwater data communication is the key, and the underwater acoustic network undertakes the important mission of detection and data communication. [0003] The deployment of sensor nodes is an organic com...

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Problems solved by technology

Wang et al. proposed a random deployment method based on a Thiessen graph. He assumed that the nodes have mobility in the horizontal direction, and used the Thiessen graph to find the coverage holes in the area and used the mobility of the nodes to make up the holes to achieve the target area. coverage, but this method can only be applied to a two-dimensional environment, and the situation in a three-dimensional environment has not been discussed

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