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Node indoor locating method based on wireless signal strength in wireless sensor network

A wireless signal strength and wireless sensor technology, which is applied in the direction of radio/inductive link selection arrangement, positioning, radio wave measurement system, etc., can solve the problems of inability to meet the needs of indoor positioning, high cost of positioning method equipment, and not suitable for indoor environments, etc. , to achieve the effect of reducing communication consumption, reducing impact, and reducing the amount of calculation

Inactive Publication Date: 2008-08-20
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the existing positioning methods have problems such as high equipment cost (TDOA), not suitable for indoor environment (GPS), too complicated pre-training (RADAR), low precision (APIT), etc., which cannot adapt to reality Indoor positioning needs in life

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  • Node indoor locating method based on wireless signal strength in wireless sensor network
  • Node indoor locating method based on wireless signal strength in wireless sensor network
  • Node indoor locating method based on wireless signal strength in wireless sensor network

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] System structure of the present invention, the node in wireless sensor network of the present invention mainly contains following four categories:

[0046] Standard position node (anchor point): This type of node has known its precise position in advance through GPS (Global Positioning System) positioning or manual setting, and provides position calculation reference for other nodes that need positioning in the wireless sensor network. Such nodes must be distributed in the wireless sensor network in advance.

[0047] Unknown position node (target node): It does not know its own position, and needs to refer to the position information of the standard position node or the known position node.

[0048] SINK node: Collect the coordinate information of multiple target nodes through the wireless sensor network, and provide corresponding location-based s...

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Abstract

The present invention belongs to node self-localization field in large-scale wireless sensor network, and discloses a node indoor localization method based on wireless signal intensity, which main includes: getting relationship curve of signal intensity and distance, and putting forward concept of effective wireless signal intensity (Effective RSS, ERSS); obtaining coordinates of target node by selecting localization arithmetic (ERSS filter + maximum likelihood estimation, triangle localization, approximate location estimation) according with anchor point amount through distance between anchor point and target by training RSS curve; providing alerting service by using physics coordinate, providing navigation service according with route arithmetic and address chain by using sign coordinate (for example in hall). Precisely localization of indoor target can be realized in condition of low-cost, simple initial configuration, and a plurality of services based on location can also be provided.

Description

technical field [0001] The invention relates to the field of self-location of nodes in a large-scale wireless sensor network, mainly uses distributed computing technology to solve the problem of self-location of nodes in the wireless sensor network, and belongs to the cross field of distributed computing technology and wireless sensor network technology. In particular, a node indoor positioning method based on wireless signal strength in a large-scale wireless sensor network is provided. Background technique [0002] Recent developments in microelectromechanical systems (MEMS) and low-power highly integrated digital devices have led to the emergence of low-cost, low-power, micro-volume sensor nodes. With the development of sensor technology and communication technology, wireless sensor network technology has been proposed, and more and more attention has been paid to it because of its wide application. A wireless sensor network is a wireless network composed of a group of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38G01S5/02
Inventor 刘海涛李冬张宝贤高雪赵壮姚郑张锋
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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