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Wireless sensor network positioning method based on RSSI (received signal strength indicator)

A wireless sensor and positioning method technology, applied in wireless communication, electrical components, etc., can solve problems such as low accuracy, poor stability, and low cost

Inactive Publication Date: 2013-10-02
赵东明
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this positioning error is large, the accuracy is not high, and the stability is poor, so there is no positioning method with high positioning accuracy, small error, strong stability, and low cost.

Method used

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  • Wireless sensor network positioning method based on RSSI (received signal strength indicator)
  • Wireless sensor network positioning method based on RSSI (received signal strength indicator)
  • Wireless sensor network positioning method based on RSSI (received signal strength indicator)

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Embodiment Construction

[0037] The principles and features of the present invention are described below in conjunction with the examples, which are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0038] A positioning method for a wireless sensor network based on RSSI, comprising the following steps:

[0039] Step 1: The gateway builds a network, adds 4 reference devices and several mobile devices to the wireless network, and sets the 4 reference devices at the four vertices of the positioning area respectively. Both the gateway and the reference device use CC2430 as the main wireless transceiver chip, the mobile device uses a CC2431 chip with a positioning engine, the gateway is connected to the host computer through the 232 serial port, and the position coordinates of each reference device are set through the host computer software.

[0040] In step 2, the configuration parameters of each mobile device are set through the host computer ...

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Abstract

The invention relates to the wireless sensor network positioning field, and specifically relates to a wireless sensor network positioning method based on an RSSI (received signal strength indicator). The method comprises the following steps: a network is established; a host computer software sets a position coordinate of each reference device and a configuration parameter of each mobile device; the reference device sends a built-in RSSI value and an ID to other reference devices; when the reference device A serves as a difference correction reference node, a reference positioning coordinate and a positioning offset amount of the reference device A are calculated; the mobile device, according to received data, obtains a preliminary positioning coordinate and a difference correction coordinate of the mobile device; a correction mean value coordinate is obtained after repeated r rounds of above steps; and finally a weighted algorithm is used to calculate a positioning coordinate. The method of the invention solves the problems in the prior art of low positioning precision, low reliability and high cost, substantially reduces effects of the environment interference factor, and is suitable for the development trend of the indoor wireless positioning.

Description

technical field [0001] The invention relates to the field of wireless sensor network positioning, in particular to a wireless sensor network positioning method. Background technique [0002] Wireless positioning requires low hardware cost, low communication overhead, and high positioning accuracy. At present, for the application and research of the wireless positioning system, the outdoor positioning system has been quite mature, and has a wide range of applications, such as positioning during emergency rescue and disaster relief, and mine personnel positioning. Due to the difficulty of indoor positioning, there are many interference factors, and the indoor positioning technology is not yet mature, with many defects, so that the accuracy of indoor positioning is difficult to compare with outdoor positioning, and the stability is very poor. Many positioning algorithms can only increase the positioning accuracy by adding reference nodes, and then increase the cost, such as TO...

Claims

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Application Information

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IPC IPC(8): H04W64/00
Inventor 赵东明
Owner 赵东明
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