Method for locating node of wireless sensor network

A wireless sensor and node positioning technology, which is used in positioning, wireless communication, radio wave measurement systems, etc., can solve the problems of not taking the physical distribution of network nodes into account, difficult to meet the high-precision requirements of node positioning, and low positioning accuracy.

Inactive Publication Date: 2008-08-27
INST OF COMPUTING TECH CHINESE ACAD OF SCI +1
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Problems solved by technology

[0007] However, despite the emergence of many sensor node positioning methods, the traditional positioning iterative refinement method directly optimizes the cost function, whether it is in a weighted or unweighted form, and does not take into account the actual network nodes. Physical distribution only optimizes the cost function from a mathematical point of view, so its positioning accuracy is relatively low, and some methods have large computational and communication overheads, making it difficult to meet the high-precision requirements of node positioning

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  • Method for locating node of wireless sensor network
  • Method for locating node of wireless sensor network
  • Method for locating node of wireless sensor network

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Embodiment Construction

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, a node positioning method for a wireless sensor network of 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 embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] A node positioning method for a wireless sensor network of the present invention aims at the shortcomings of existing positioning methods, and proposes a distributed node positioning method based on two-hop restrictive conditions. This method introduces a priori two-hop The minimum and maximum distance (Euclidean distance calculated based on coordinates) constraint conditions satisfied between jumping neighbor nodes, and the corresponding penalty term is introduced into the local cost function of the node, forcing the negative gradie...

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Abstract

The invention discloses a node locating method of a wireless sensor network, comprising the following: step A, a local relative coordinate system of each part of the wireless sensor network is established; step B, the local relative coordinate systems are integrated to obtain an overall relative coordinate of all nodes, and the overall relative coordinate is converted into an overall absolute coordinate by means of a beacon node with known position information; step C, when the overall absolute original coordinate of all nodes is obtained, node locating iteration refinement is carried out. The node locating method, which overcomes the disadvantages in the prior art, provides a high-precision node locating method of a wireless sensor network.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks (WSN), in particular to a node positioning method of a wireless sensor network. Background technique [0002] Wireless Sensor Networks (WSN) node positioning has broad application prospects in logistics management, animal tracking, security and military reconnaissance and other fields. [0003] The research on WSN originated in the 1970s. It was first used in the military field. After entering the 21st century, with the advancement of wireless communication technology, microchip manufacturing and other technologies, the research of WSN has made great progress in various applications. "MIT Technology Review" listed WSN as the first of the ten emerging technologies that will change the future world, and the US "Defense Today" magazine even believed that the application and development of WSN will cause an epoch-making revolution in military technology and changes in future warfare...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/02H04W64/00
Inventor 罗海勇赵方林权朱珍民何哲
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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