Distributed wireless sensor network node self positioning method

A wireless sensor and positioning method technology, applied in the field of communication, can solve problems such as large energy loss, large positioning error, and inability to update effective information in time

Inactive Publication Date: 2008-02-06
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this DV-Hop method is that only in the isotropic dense network, the correction value can reasonably estimate the average distance per hop; Energy loss, low positioning accuracy
[0007] 2. When the proportion of anchor nodes is s

Method used

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  • Distributed wireless sensor network node self positioning method
  • Distributed wireless sensor network node self positioning method
  • Distributed wireless sensor network node self positioning method

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Embodiment Construction

[0053] In the wireless sensor network of the present invention, a node that is equipped with a GPS device and can obtain its own geographical coordinate position through the device is called an anchor node, and a node that needs to locate itself through the anchor node is called a normal node, and nodes without special description include Normal nodes and anchor nodes. All nodes are provided with their own hop lists and sending queues, and each hop list records the corresponding hop values ​​from this node to each anchor node; the present invention first initializes the nodes, and ordinary nodes set their hop lists to ∞ , the send queue is emptied. For the anchor node, the hop count list is set to ∞ except for the item corresponding to the node ID number of the anchor node. In the whole network, the node ID number in the present invention does not leave the team after entering the team, and each node cyclically sends the coordinates, node ID number, and correction value of th...

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Abstract

The present invention discloses a node autologous location method in the wireless sensor network, and the process is that each anchor node in the wireless sensor network sends the anchor node coordinate, the node ID number, the correct value, and the jumping-figure information to all nodes of the entire net, and enables the entire net to obtain the autologous information of all anchor nodes; after obtaining the smallest jumping-figure of other anchor nodes, each anchor node performs the calculation of the smallest mean square error correct value, and sends out the smallest mean square error correct value, then enables all ordinary anchor nodes to obtain the smallest mean square error correct value of all anchor nodes ultimately; each ordinary anchor node selects one smallest mean square error correct value c from the all smallest mean square error correct values, and performs the trilateral localization with each anchors node autologous information obtained from the mutual information, and performs the choice of the probability, then takes the trilateral localization coordinate of the biggest probability as the autologous position of the ordinary node. The present invention has the advantages of low energy consumption and high accuracy, thus being available in the autologous localization of the isotropic wireless sensor network node.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a self-positioning technology in a wireless sensor network, in particular to a distributed wireless sensor network node self-positioning method, which can be used in the wireless sensor network node self-positioning. Background technique [0002] The wireless sensor network is composed of a large number of cheap micro sensor nodes deployed in the monitoring area, and forms a multi-hop self-organizing network system through wireless communication. Its purpose is to cooperatively perceive, collect and process the information of the sensing objects in the network coverage area , and sent to the observer, mainly used in military scenarios, target tracking, environment detection and space exploration. For most applications, the sensed data is meaningless without knowing the location of the sensor nodes. Sensor nodes must be able to locate and track external targets only when they...

Claims

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Application Information

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IPC IPC(8): G01S5/02G01S5/14H04Q7/38H04W64/00H04W84/18
CPCY02B60/50Y02D30/70
Inventor 盛敏狄倩李建东姚俊良田野张琰时振帅
Owner XIDIAN UNIV
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