Shadow fading-based wireless detection network node positioning method

A network node, shadow fading technology, applied in wireless communication, electrical components, etc., can solve the problem of immediate update of RSS database

Active Publication Date: 2015-08-12
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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Problems solved by technology

But this method needs a lot of manpower to build a database in advance, and when the environment changes, the RSS database needs to be updated immediately

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  • Shadow fading-based wireless detection network node positioning method
  • Shadow fading-based wireless detection network node positioning method
  • Shadow fading-based wireless detection network node positioning method

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Embodiment Construction

[0050] The present invention will be described in detail below with reference to the drawings and embodiments, and the technical problems and beneficial effects solved by the technical solution of the present invention will also be described. The flowchart of the positioning method based on shadow fading proposed by the present invention is as follows figure 1 As shown, it specifically includes the following implementation steps:

[0051] Step 1: Configure the anchor node array:

[0052] L anchor nodes working in the same frequency band and supporting the same communication protocol form an anchor node array and L≥2, place the anchor node array, 1 base station node and 1 unknown node in a 2-dimensional xoy plane, and these The nodes have the same physical structure; the coordinates of the L anchor nodes constituting the anchor node array are known, respectively (x l ,y l ) T ,l∈{1,2,...,L}, the coordinates of unknown nodes are marked as (x,y) T ; L anchor nodes and the un...

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Abstract

The invention discloses a shadow fading-based wireless detection network node positioning method, and belongs to the technical field of wireless positioning in a wireless network. An obstacle performs uniform motion according to a preset track between an anchor node array and a node of an unknown location, wireless links formed by the anchor node array and the node of the unknown location are obstructed successively by the obstacle, thereby causing shadow fading of the links, time of the obstacle passing through the links is estimated through shadow fading, and location estimation of the unknown node is obtained through a least square algorithm by use of link passing-through time. Compared with other positioning methods, the method provided by the invention can improve positioning accuracy, and can use wireless signals which are widely distributed at present to locate a terminal capable of sending wireless signals.

Description

technical field [0001] The invention relates to a wireless positioning method, which is a node positioning method based on shadow fading, and belongs to the technical field of wireless positioning in wireless networks. Background technique [0002] With the increasing demand for location-based services in recent years, the research on wireless positioning technology has become more and more active. Wireless location methods based on Received Signal Strength (RSS), Angle of Arrival (AOA) and Time of Arrival (TOA) have been proposed in the past few decades. However, the positioning method based on AOA requires the nodes to install special antennas such as antenna arrays or directional antennas that can rotate. The method based on TOA requires precise clock synchronization between the anchor node and the unknown node. In recent years, RSS-based wireless positioning methods have attracted extensive attention of researchers, because RSS can be provided by most wireless devices,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
CPCH04W64/003H04W64/006
Inventor 刘珩王正欢倪亚萍许胜新安建平卜祥元辛怡
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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