Historical coordinate data analysis-based node accurate real-time positioning method applied to wireless sensor network

A wireless sensor, coordinate data technology, applied in positioning, wireless communication, radio wave measurement system and other directions, can solve the problem of unpredictable position information of other nodes

Active Publication Date: 2018-08-14
TSINGHUA UNIV
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Problems solved by technology

[0003] A wireless sensor network is a wireless network formed by the self-organization of multiple irregularly distributed sensor nodes. In most cases, the sensor nodes in the network are deployed randomly. In a special wireless sensor network, only a few nodes have self-positioning In addition to the function, the location information of other nodes in the remaining network cannot be predicted

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  • Historical coordinate data analysis-based node accurate real-time positioning method applied to wireless sensor network
  • Historical coordinate data analysis-based node accurate real-time positioning method applied to wireless sensor network
  • Historical coordinate data analysis-based node accurate real-time positioning method applied to wireless sensor network

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Embodiment Construction

[0059] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] The wireless sensor network of the present invention includes mobile anchor nodes and ordinary nodes, wherein the ordinary nodes include nodes to be positioned and neighbor nodes. First, the mobile anchor nodes move periodically according to a pre-planned path, and the movement of the entire wireless sensor network is completed in one w...

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Abstract

The invention provides a historical coordinate data analysis-based node accurate real-time positioning method applied to wireless sensor network. The method includes the following steps that: a mobileanchor node is made to perform periodic movement according to a planned path, and node precise positioning is completed; when the real-time positioning request of a node i to be positioned is received, a position coordinate fluctuation function which is represented by a symbol described in the descriptions of the invention is calculated for the stored node coordinate historical data of the node ito be positioned; an error threshold is set to be deltad, if the position coordinate fluctuation function is smaller than or equal to the error threshold, the historical position coordinate data of the node i to be positioned are adopted to perform real-time positioning; and if the position coordinate fluctuation function is larger than the error threshold, the historical position coordinate dataof neighbor nodes are adopted to perform real-time positioning. According to the method, the historical position fluctuation characteristics of the nodes are analyzed and calculated on the basis of the periodic positioning realization of the mobile anchor node, and therefore, the timeliness of positioning can be satisfied, and the accuracy of the positioning can be improved.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to an accurate real-time positioning method for nodes based on historical coordinate data analysis in the wireless sensor network. Background technique [0002] With the advent of the Internet of Things and the era of big data, wireless sensor network technology has been widely promoted and applied in people's daily life, which has greatly changed human life style and industrial structure. In the application of wireless sensor networks, sensor nodes need to perceive and collect information in the environment, and the monitored data must be combined with the location coordinates of the collected information to have practical significance. Node positioning technology is one of the important supporting technologies of wireless sensor networks. One, it has also become a research hotspot. [0003] A wireless sensor network is a wireless network formed by the self-organization of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02H04W64/00
CPCG01S5/0278H04W64/00
Inventor 宋士吉徐晶张玉利赵晗
Owner TSINGHUA UNIV
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