Loop auxiliary underwater positioning method without time synchronization

An underwater positioning, timeless technology, applied in wireless communication, electrical components, etc., can solve problems such as inaccessibility, practical application limitations, high positioning coverage, etc., to improve accuracy, improve positioning coverage, and reduce the impact of measurement errors. Effect

Active Publication Date: 2014-09-10
WUHAN UNIV
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Problems solved by technology

The positioning technology based on arrival time difference ranging is difficult to be applied in large-scale underwater networks, which brings limitations to practical applications
The existing positioning technology based on two-way time-of-arrival ranging cannot deal with the ranging problem of underwater asymmetric links, and cannot achieve high positioning coverage

Method used

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  • Loop auxiliary underwater positioning method without time synchronization
  • Loop auxiliary underwater positioning method without time synchronization
  • Loop auxiliary underwater positioning method without time synchronization

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Embodiment Construction

[0035] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0036] The structure of underwater acoustic communication sensor network is figure 1 As shown, the underwater sensor network is composed of two kinds of nodes: one is a common node, and the other is an anchor node. A small number of anchor nodes are evenly distributed on the water surface, and each anchor node can directly receive the GPS signal to obtain the position directly, and is equipped with an underwater acoustic modem to communicate with common underwater nodes. Ordinary nodes that need to be positioned are randomly arranged in the underwater three-...

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Abstract

The invention discloses a loop auxiliary underwater positioning method without time synchronization. The loop auxiliary underwater positioning method without the time synchronization includes that firstly, each node completes link symmetry detection and acquires the symmetry link length by sending hello information once and sending distance measurement information once, then a water surface anchor node sends self coordinate information once, and completes positioning of a part of nodes by using distance and coordinate information, and the nodes which are positioned also send self coordinate information once, and performs iteration positioning, and finally a loop auxiliary method is adopted for nodes which are not positioned, coordinates and distances of neighbor nodes which are connected through asymmetry links are obtained, and accordingly positioning is completed. The nodes which are positioned can send the self coordinate information once, trigger a new iterative process, and furthermore enlarge a positioning coverage range, and complete the whole positioning process. The loop auxiliary underwater positioning method without the time synchronization can meet positioning requirements high in accuracy and large in coverage range, and effectively eliminates influence of the underwater asymmetry links on the node positioning under the condition that the time synchronization does not exist.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic communication, and relates to a node positioning method of an underwater acoustic communication sensor network, in particular to a loop-assisted underwater positioning method without time synchronization. Background technique [0002] With the development of human science and technology, land exploitable resources are increasingly scarce, and the development and utilization of underwater resources has become an inevitable trend. Among them, the underwater acoustic communication sensor network is an effective way to explore the underwater world. It has the advantages of wide coverage, accurate and real-time data, and flexible operation. It has broad application prospects in various fields. In the underwater acoustic communication sensor network, the location information of the nodes is very important, and the sensor data combined with the location information has more practical applicat...

Claims

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Application Information

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IPC IPC(8): H04W64/00
Inventor 李德识张松陈健廖子龙
Owner WUHAN UNIV
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