Underwater sensor network positioning method

Abstract

The invention discloses an underwater sensor network positioning method, which integrates a three-dimensional Euclidean distance estimation method, an iterative position estimation method and a DV-Hop algorithm, and for completing the positioning of common nodes, gives selection criteria of one-hop upgrade reference nodes, two-hop upgrade reference nodes and next-hop upgrade reference nodes for forwarding positioning request information packets. The method comprises the following steps: calculating the distance between a common node and a two-hop upgrade reference node by using the three-dimensional Euclidean distance estimation method and the DV-Hop algorithm, after the coordinates of the node are calculated by using a four-edge measurement method, calculating a positioning error and a trust value according to the coordinates and the distance between the node and a reference node, comparing the magnitude relation of the trust value and a threshold value, and determining whether the node is positioned successfully and becomes an upgraded reference node; and the iterative position estimation method is used for broadcasting a beacon information packet containing the position of a common node after the common node is positioned successfully, and assisting the positioning of other common nodes. The method disclosed by the invention is applicable to the static or dynamic positioning of nodes in large-scale underwater wireless sensor networks.

Description

technical field [0001] The invention relates to underwater wireless sensor network technology, in particular to a node positioning method in the underwater sensor network. Background technique [0002] Underwater Wireless Sensor Networks (UWSNs for short) is proposed for the application of underwater environment. UWSNs can provide better technical support and information platforms to promote marine environment management, resource protection, disaster monitoring and early warning, marine engineering, offshore production operations, and marine military activities, so underwater wireless sensor networks have broad application prospects. Most applications based on underwater sensor networks are associated with the location of the node. To implement these applications, the node location in the network is required to be uniquely determined. Determining the node location has the following important meanings: First, the data must have location information and time information Mark...

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Problems solved by technology

It can be seen from this that in order to determine the uniqueness of the coordinates of ordinary nodes, the neighbor nodes between the ordinary node and the two-hop reference nodes need to vote for judgment. However, the article does not indicate whether the position of the neighbor node is determined, which will lead to uncertainty Uniqueness of Ordinary Node Coordinates

In addition, when there are not enough one-hop reference nodes and one-hop upgrade reference nodes around common nodes, the iterative position estimation method described in this paper cannot complete the positioning of such common nodes

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