Locating method of wireless sensor network based on RSSI (Received Signal Strength Indicator)

A wireless sensor and positioning method technology, applied in network topology, wireless communication, transmission monitoring, etc., can solve problems such as being susceptible to environmental interference, affecting positioning accuracy, and unsatisfactory positioning accuracy

Inactive Publication Date: 2012-05-30
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above two technologies use some simple estimation methods in mathematics, which can only achieve rough positioning of unknown nodes; they have high requirements for the density of nodes, and the positioning accuracy is not ideal, and they are easily affected by environmental interference. Its positioning accuracy

Method used

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  • Locating method of wireless sensor network based on RSSI (Received Signal Strength Indicator)
  • Locating method of wireless sensor network based on RSSI (Received Signal Strength Indicator)
  • Locating method of wireless sensor network based on RSSI (Received Signal Strength Indicator)

Examples

Experimental program
Comparison scheme
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Embodiment

[0028] This embodiment includes the following steps:

[0029] Step 1: Establish a Cartesian coordinate system to obtain the position information of each anchor node in the wireless sensor network, and measure the RSSI values ​​of the anchor node and the node to be tested respectively, and estimate the obtained RSSI value to obtain the node to be tested and each node to be tested. The distance information of the anchor node.

[0030] The estimation process described is:

[0031] r j = r 0 e p j - p 0 10 n ,

[0032] where: r j is the distance between the node to be tested and the jth anchor node, p j is the RSSI value of the jth anchor node, n is the ch...

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PUM

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Abstract

The invention relates to a locating method of a wireless sensor network based on an RSSI (Received Signal Strength Indicator), which belongs to the technical field of wireless sensor networks and comprises the following steps of: respectively measuring the RSSI values of anchor nodes and a blind node to obtain the information on the distance between the blind node and each anchor node; selecting three anchor nodes nearest to the blind node as reference nodes to perform rough locating to obtain the rough locating position of the blind node; establishing a distribution probability model of the blind node to obtain the distribution probability of the blind node in each position of the wireless sensor network; performing locating searching processing by using the rough locating position of the blind node as an initial position and L1 as step length to obtain the first locating position of the blind node; and performing locating searching by using the (N-1)th locating position as an initial position and L(N) as step length to obtain the Nth locating position of the blind node, i.e. the finial position of the blind node. The invention has low requirements for node density, no environmental interference, great improvement on locating accuracy and low locating error reduced to be between 20% and 50%.

Description

technical field [0001] The present invention relates to a method in the technical field of wireless sensor networks, in particular to a positioning method for wireless sensor networks based on RSSI (Received Signal Strength Indication, Received Signal Strength Indication). Background technique [0002] Wireless Sensor Network (WSN, Wireless Sensor Network) is an IT technology that will have a significant impact on human life after the Internet. It combines sensor technology, embedded technology, microelectromechanical system (MEMS, Microelectronic mechanical system) technology and modern network and wireless communication technology. In the sensor network, all kinds of integrated micro-sensors cooperate to monitor in real time, perceive and collect information of various environments or monitoring targets, and process the information, and then use multi-hop wireless communication network In this way, information is transmitted to the user terminal, so as to realize the conn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W84/18H04B17/00
Inventor 唐晓宁陈凯赵琦陈佳品李振波
Owner SHANGHAI JIAOTONG UNIV
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