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Wireless sensor network perpendicular intersection positioning algorithm

A wireless sensor, vertical intersection technology, used in positioning, radio wave measurement systems, instruments, etc., can solve the problem of large positioning error, achieve the effect of small calculation amount, simple algorithm, and avoid positioning error

Inactive Publication Date: 2008-10-15
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to solve the positioning of randomly distributed sensor nodes in wireless sensor networks and to overcome the problems of large positioning errors in traditional algorithms.

Method used

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  • Wireless sensor network perpendicular intersection positioning algorithm
  • Wireless sensor network perpendicular intersection positioning algorithm
  • Wireless sensor network perpendicular intersection positioning algorithm

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing, the implementation of the present invention is described in detail as follows:

[0046] refer tofigure 1 , figure 1 An example of a sensor network is given in 2 to illustrate the vertical intersection localization algorithm. After the sensor network is configured, mobile beacons move through the network and broadcast beacon signals periodically. The beacon signal contains the location of the mobile beacon at the time of the broadcast. After receiving the beacon signal, the sensor node knows that the mobile beacon is somewhere nearby. figure 1 The solid line in is the trajectory of the mobile beacon, and the arrow points to its moving direction. The mobile beacon starts at point P 1 , terminate at point P 3 , point P 2 is the inflection point of mobile beacons. The propagation radius of the mobile beacon is R, and the dotted line P 1 P 3 with the trajectory P of the mobile beacon 1 P 2 P 3 An imaginary equilatera...

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Abstract

A perpendicularly-crossed positioning algorithm of a wireless sensor network is used in a wireless sensor network of limited power and random distribution. The algorithm is on the premise of a mobile beacon with known self position, wherein the mobile beacon keeps broadcasting signal and current self position on a movement path line; a node records a point of highest signal intensity through comparing signal intensity, and calculates the position of the node by a geometry method according to the two points of highest signal intensity obtained from every two adjacent sides. The perpendicularly-crossed positioning algorithm requests that the path lines of the mobile beacon are two sides of an equilateral triangle and that the side length of the triangle is equal to the transmission radius R of the mobile beacon. The algorithm can accurately calculate the position of the node through using just one mobile beacon, thereby improving system extensibility and usability and reducing hardware requirement to save cost.

Description

technical field [0001] The invention relates to a vertical intersection positioning algorithm of a wireless sensor network. Background technique [0002] Wireless sensor network (WSNs) is a special Ad-hoc network composed of many sensor nodes in the form of self-organization. Each sensor node is composed of data acquisition module, data processing and control module, communication module and power supply module. In addition, it may also include other parts related to the application, such as positioning system, power system, etc. With the help of built-in various sensors, temperature, humidity, air pressure, chemical and physical phenomena can be measured. Because wireless sensor network has a very broad application prospect in military, medical, environmental protection and other fields, it has been valued by many national scientific research institutions. [0003] The self-location of sensor nodes is the basis of sensor network applications. For example, many applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/12H04B17/00H04L12/28H04B17/318
Inventor 郭忠文洪锋冯源曲海鹏蒋永国郭瑛张艳华刘晓东陈朋朋李正宝
Owner OCEAN UNIV OF CHINA
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