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Positioning method and device in sensor network

A sensor network and positioning method technology, applied in the field of wireless sensor networks, can solve the problems of large positioning errors and uneven distribution of reference nodes, and achieve the effect of reducing communication load and power consumption and meeting positioning accuracy

Active Publication Date: 2010-01-27
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0015] An object of the present invention is to provide a positioning method in a sensor network to solve the problem of large positioning errors due to uneven distribution of reference nodes, thereby reducing the impact of reference node topology on positioning accuracy and providing stable positioning accuracy

Method used

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  • Positioning method and device in sensor network
  • Positioning method and device in sensor network

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0043] Such as figure 1 As shown, the present invention provides a method for positioning in a sensor network, and the sensor network includes a plurality of sensors for receiving signals sent by targets to be positioned; wherein the positions of the sensors in the sensor network are fixed, and Targets in sensor networks can be fixed or mobile. The method comprises the steps of:

[0044] Step S101: The target transmits a signal. Specifically:

[0045] The target T to be positioned broadcasts and sends a beacon message.

[0046] Step S102: The sensors receive signals, and gather the posi...

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Abstract

The invention provides a positioning method and device in a sensor network. The positioning method comprises the following steps: step S101: emitting signals by a target; step S102: receiving signals by sensors, and collecting the positioning information of the sensors receiving signals; step S103: calculating the smallest enclosing circle determined by all positioning information according to the collected positioning information, and taking the center of the smallest enclosing circle as a target positioning result. The invention can overcome the influence on positioning precision caused by uneven distribution of reference nodes.

Description

technical field [0001] The invention relates to a wireless sensor network, in particular to a method and device for locating a target in a sensor network. Background technique [0002] The wireless sensor network (Wireless Sensor Network, WSN) bridges the gap between the computer and the real world through deeper embedding, wider collection and more free deployment, so that people can monitor any place at any time. Information collection is the most important function of WSN. The data is meaningful only when the location of the collection can be determined. In addition to the location label of the data, the routing protocol that supports message forwarding can be optimized with the help of location information. For example, geographic information-based routing protocols make routing decisions based on routing node location information. Therefore, positioning is an indispensable network service. [0003] Generally, WSN positioning methods are divided into two categories: ra...

Claims

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Application Information

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IPC IPC(8): G01S5/02
Inventor 周全朱红松徐勇军李晓维
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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