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Wireless sensing network node positioning and calibrating method based on trusted neighbor distance

A wireless sensor network and node positioning technology, applied in wireless communication, network topology, electrical components, etc., to achieve the effect of improving positioning accuracy and reducing energy consumption

Inactive Publication Date: 2013-12-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a wireless sensor network node positioning and calibration method, which can adapt to the irregular network topology in practical applications without increasing hardware equipment and communication energy consumption, so as to improve node positioning purpose of precision

Method used

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  • Wireless sensing network node positioning and calibrating method based on trusted neighbor distance
  • Wireless sensing network node positioning and calibrating method based on trusted neighbor distance
  • Wireless sensing network node positioning and calibrating method based on trusted neighbor distance

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Embodiment approach

[0041] One embodiment of the present invention is as follows:

[0042] Step 1, determine the connectivity of all nodes in the network

[0043] Applying the DV-hop positioning method, each anchor node broadcasts information including the hop value initialized to 1, the ID number and its own position coordinates to the neighbor nodes, and each neighbor node that receives this information will retain this information and send the hop value Add 1 to continue forwarding. During this process, the node retains the information with the smallest hop value from the same anchor node. In addition, the unknown node obtains the ID number of the neighbor anchor node in the first information forwarding, and then not only records the number of hops from itself to each anchor node, but also keeps the number of hops from the neighbor anchor node to each anchor node. Through this mechanism, all nodes in the network will obtain the location information of each anchor node, and at the same time, u...

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Abstract

The invention discloses a wireless sensing network node positioning and calibrating method based on a trusted neighbor distance. The method includes a step of determining connectivity of all nodes in a network, a step of acquiring distances between each unknown node and different anchor nodes, a step of estimating an initial position coordinate of each unknown node and a step of calibrating positions of unknown nodes which have neighboring anchor nodes. Through use of connectivity difference, the wireless sensing network node positioning and calibrating method enables optimal estimation of the distances between the unknown nodes and the neighboring anchor nodes to be carried out. When initial positions of the unknown nodes are acquired, initial estimated positions of the unknown nodes are calibrated through use of the trusted neighbor distance so that positioning precision is improved efficiently. And in the method, no extra hardware devices are added to exchange information with the nodes so that no communication cost is added and energy consumption is low.

Description

technical field [0001] The invention relates to the technical field of wireless communication networks, in particular to a node positioning calibration method of a wireless sensor network. Background technique [0002] Most of the nodes in the wireless sensor network are randomly distributed in the monitoring area. These nodes can be divided into two types: anchor nodes and unknown nodes. The location cannot be determined in advance, and nodes within a certain range can communicate with each other freely, called neighbor nodes. [0003] In many applications, the location of the event or the location of the node that obtains the information is the important information contained in the monitoring message of the sensor node, and the monitoring data without location information is often meaningless. For example, when a target is tracked, the sensor detects the tracked target, and the position of the target needs to be calculated through the position of the sensor; in a fire al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W84/18
Inventor 江禹生陈跹江松洋
Owner CHONGQING UNIV
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