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Underwater multistage positioning method

A positioning method and a technology for positioning nodes, which are applied in electrical components, wireless communication, network topology, etc., can solve problems such as difficult positioning of isolated nodes, and achieve the effect of improving coverage and reducing positioning errors

Inactive Publication Date: 2013-11-13
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art, aiming at the problem that isolated nodes are difficult to locate, a kind of underwater multi-level positioning method is proposed

Method used

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Embodiment Construction

[0029] An underwater multi-level positioning method of the present invention will be described in detail below in conjunction with the accompanying drawings. The present invention comprises the following steps:

[0030] Step 1. Obtain the distance between the self-node and the adjacent nodes. The antenna of each node periodically rotates counterclockwise in the horizontal direction to send a signal with its own identification to search for surrounding nodes. The surrounding nodes respond to the signal after receiving the signal. Send a response signal with its own identity to complete a handshake, and calculate the distance between all adjacent nodes within the communication radius according to the speed of the sound wave underwater and the time required for a handshake of the signal;

[0031] Step 2, the greedy method obtains the shortest path routing table. From the reference node, use the greedy method to select a shortest path to the node to be located, such as figure 1 ...

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Abstract

The invention provides an underwater multistage positioning method and belongs to the technical field of wireless sensor network positioning. According to the method, a traditional trilateration algorithm and a multistage positioning algorithm are improved, for isolated nodes outside the communication radius of a reference node, other unknown nodes between the reference node and a node to be positioned are taken as a routing node to forward position information of the reference node, through included angle between a receiving signal and a sending signal of the routing node, errors of the distance between the reference node and the node to be positioned are further reduced by using the cosine law, and finally, positioning is finished by using the trilateration. By means of the underwater multistage positioning method, the positioning coverage rate is improved, and positioning errors are reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to an underwater multi-level positioning method. Background technique [0002] Underwater wireless sensor networks have many similarities with traditional land wireless sensor networks. It uses underwater sensors as the medium for information acquisition. The nodes communicate with each other through sound waves, collect the required data in the marine environment, connect the underwater network with the conventional network, and transmit the obtained data to the observer. [0003] In a three-dimensional underwater wireless sensor network, sensor nodes often move due to factors such as water flow, and the positioning of these mobile nodes is very necessary, because some applications such as underwater biological monitoring applications require high-precision positioning, and underwater Monitoring the network requires determining the location information of a large nu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W84/18
Inventor 刘林峰朱志文管文冰
Owner NANJING UNIV OF POSTS & TELECOMM
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