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Anchor-node-free three-dimensional wireless sensor network physical positioning method

A wireless sensor and physical positioning technology, applied in wireless communication, network topology, electrical components, etc., can solve problems such as inappropriate deployment of anchor nodes and unavailable positioning methods

Inactive Publication Date: 2012-10-03
UNIV OF JINAN
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Problems solved by technology

[0005] In some scenarios, such as battlefields, disaster rescue, etc., it is not suitable to deploy anchor nodes, but the spatial physical position of the perceived object needs to be determined, and the positioning methods of the above-mentioned documents and patent inventions cannot be used.

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  • Anchor-node-free three-dimensional wireless sensor network physical positioning method

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0042] A hardware module framework structure of each sensor node is as follows: figure 2 As shown, although the hardware composition of WSN nodes varies greatly according to different applications, the nodes can be divided into perception module, processor module, wireless communication module and power module in general. The neighbor node ranging required by the present invention can generally be realized by receiving signal strength RSSI, time of arrival ToA, time difference of arrival TDoA, ultra-wideband UWB and other technologies. The direction of arrival of the node signal, calculate the relative bearing or angle between the receiving node and the transmitting node. Therefore, the measurement module can also be understood as the function expansion of the wireless communication module, so in figure 2 marked with a dotted line.

[0043] The con...

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Abstract

The invention relates to an anchor-node-free three-dimensional wireless sensor network physical positioning method. In the method, the concept of partially concentrating and global distributing is adopted to solve the common problem of reversal differences in distance measuring methods, and achieving precise physical positioning is achieved through low calculated amount and communication traffic. The method comprises the steps of: 1) initializing a WSN (Wireless Sensor Network) system, searching an adjacent node of each sensor node through each sensor node, and measuring the distance and relative angle information between each sensor mode and the adjacent node; 2) establishing each local space rectangular coordinate system of each node, wherein all rectangular coordinate systems meet a right-hand rule, and the axis z always points to the same half space; 3) calculating the local coordinate of each adjacent node; 4) solving a three-dimensional coordinate system transformational matrix based on homogeneous coordinates through the adjacent node, and transforming the transformational matrix to calculate a coordinate relative to another local coordinate system; and 5) selecting the origin of global coordinate system, and through the recursion transmission of the coordinate system transformational matrix, calculating the global physical coordinate of each node.

Description

technical field [0001] The invention relates to the field of wireless network and mobile computing, in particular to a three-dimensional wireless sensor network physical positioning method free of anchor nodes. Background technique [0002] Wireless sensor network (WSN) integrates the functions of perception, calculation, communication and control, and has a wide range of applications and is complex. In addition to the traditional issues that need to be discussed in wireless networks, such as channel access and control, multi-hop routing selection and optimization, security risks, etc., it also faces a problem that needs to be researched and solved due to its characteristics, how to determine the random distribution of sensors The position of the node itself is one of the key issues. Due to the characteristics of WSN, it is generally not suitable to use GPS, but to develop a distributed node positioning method combined with application requirements. Although there are many...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W84/18
Inventor 张远张玉璘周劲韩春艳陈月辉柏方伦
Owner UNIV OF JINAN
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