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

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

Inactive Publication Date: 2011-10-05
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0006] The accuracy of ranging and positioning based on RSSI is not high, and it is easily disturbed by the environment
For example, in the process of wireless signal propagation, uncertain fact

Method used

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

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Embodiment Construction

[0051] The method of the present invention will be further described below according to the accompanying drawings.

[0052] An RSSI-based wireless sensor network node positioning method involves anchor nodes and unknown nodes in the wireless sensor network. Nodes with known coordinate positions are called anchor nodes, and nodes with unknown coordinate positions are called unknown nodes. The special feature of this positioning method is that in terms of reading RSSI values, the Gaussian distribution function model is used to select effective RSSI values, which to a certain extent removes small probability events during RSSI measurement and improves the accuracy of RSSI values ​​​​between nodes; Effectively use the distance between the anchor nodes and the RSSI value as a reference to obtain the distance between the unknown node and the anchor node, which improves the measurement accuracy between the unknown node and the anchor node; use the triangle positioning method to obtain...

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Abstract

The invention relates to a wireless sensor network node positioning method based on a received signal strength indicator (RSSI). The precision of the traditional method is not high, and the traditional method is easily disturbed by environment. In the method, an effective RSSI value is selected by using a Gaussian distribution function model in the aspect of reading RSSI value, so that small probability events during RSSI measurement are removed to a certain extent, and the precision of RSSI value between nodes is improved; and the coordinates of an unknown node are obtained by a triangular positioning method, and the unknown node is circularly refined via the distribution probability model of the unknown node, so that a point with the maximum distribution probability is found and is used as the final positioning coordinate. In the method, the signal intensity and distance information between anchor nodes are introduced and are used as the reference; the unknown node coordinate is found out via the distribution probability model of the unknown node; the distance measurement precision and the positioning precision between the unknown node and the anchor node are improved; and the method is not easily disturbed by environment.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, in particular to a wireless sensor network node positioning method based on RSSI (Received Signal Strength Indication, received signal strength indication). Background technique [0002] In wireless sensor networks, location information is crucial to the monitoring activities of wireless sensor networks, and data without location information is meaningless. For example, many applications such as target monitoring and tracking, intelligent transportation, and logistics management require network nodes to know their own locations in advance, and use location information to complete application requirements during communication and collaboration. [0003] The miniaturization and limited battery power supply capacity of sensor nodes greatly restrict the choice of node hardware. Installing GPS modules for all network nodes is limited by issues such as cost, power consumption, and sca...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04W84/18H04B17/00
Inventor 王建中蔡优笔王瑞荣薛安克葛铭
Owner HANGZHOU DIANZI UNIV
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