Wireless sensor network node self-positioning method based on mobile anchor node

A wireless sensor, mobile anchor node technology, applied in wireless communication, network topology, electrical components and other directions, can solve the problem of high algorithm complexity, achieve the effect of simple algorithm, high positioning accuracy and low cost

Inactive Publication Date: 2013-06-12
广西农垦昌菱农场有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, in the current research on the application of mobile anchor nodes for positioning, most of them realize the communication coverage of all unknown nodes in the whole network through the p

Method used

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  • Wireless sensor network node self-positioning method based on mobile anchor node
  • Wireless sensor network node self-positioning method based on mobile anchor node
  • Wireless sensor network node self-positioning method based on mobile anchor node

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] As shown in Figure 1, the anchor node moves along the x-axis to realize the positioning principle diagram. Figure 1 (a), (b), and (c) respectively represent the positioning principles of unknown nodes in several different situations. The dotted lines in the figure and the coordinates The area enclosed by the axis is the monitoring area, the hollow circle represents the sensor node (unknown node) that needs to be positioned, the solid circle on the coordinate axis represents the moving anchor node, unknown nodes A (xa, ya), B (xb, yb), C(xc, yc) respectively represent arbitrarily selected unknown nodes in several different situations, and the self-location method is explained through the self-location principle of unknown nodes A, B, and C. The positioning steps are as follows:

[0021] Step 1: The sensor nodes are randomly scattered in the monitoring area, and the nodes enter the waiting state after being thrown down;

[0022] Step 2: The base station applies a synchro...

Embodiment 2

[0038] Such as figure 2 As shown, two anchor nodes move along the x-axis and y-axis respectively to realize the positioning schematic diagram, wherein the first anchor node 201 moves along the x-axis, and the second anchor node 202 moves along the y-axis, and the positioning steps are as follows:

[0039] Step 1: The sensor nodes are randomly scattered in the monitoring area, and the nodes enter the waiting state after being thrown down;

[0040] Step 2: The base station applies a synchronization algorithm (such as the RBS synchronization algorithm) to realize the synchronization of the entire network, and then the unknown node enters a dormant state;

[0041] Step 3: Establish a two-dimensional planar Cartesian coordinate system, so that all sensor network monitoring areas are in the first quadrant, and place the first anchor node 201 at the coordinate origin O(0,0), and the first anchor node 201 is directional with the antenna The starting azimuth angle between the x-axis i...

Embodiment 3

[0058] Such as image 3 As shown, the realization method of sensor network hierarchical positioning. Assume that the network layer height is h to realize network layering, the size of h is determined according to information such as anchor node communication capability and network scale, and the layering line is parallel to the coordinate axis. The initial position of the anchor node is at the origin of the coordinates, and first moves along the positive direction of the x-axis. Using the method of Embodiment 1, the location of the unknown node on the first layer can be realized. When the anchor node reaches the network boundary, as image 3 At point O1, the anchor node turns to move upward along the direction of O1O2. When the anchor node reaches point O2, it moves to the left along the direction of O2O3 and enters the second layer of positioning until it reaches point O3 to complete the second layer of unknown node positioning, and then anchor The node then turns to move up...

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Abstract

The invention relates to the technical field of wireless sensors, and discloses a wireless sensor network node self-positioning method based on a mobile anchor node, which is used for solving a problem of high complexity when a mobile anchor node positioning method is adopted. The method comprises the following steps of: building a two-dimensional rectangular plane coordinate system by aiming at a monitoring area so as to locate a sensor network monitoring area in a first quadrant completely and position an initial position of the anchor node in the origin of coordinates. The anchor node does not move when positioning broadcasting location information at interval or positioning the broadcasting location information, all the unknown nodes can receive the location information through rotating a directional antenna and store the received location information and signal strength, and the location information with the largest signal strength is selected as the available self-positioning data after the unknown nodes do not receive the location information. All the unknown nodes receive different location information for at least two times along with the movement of the anchor node, and a self position is computed through utilizing the selected available self-positioning data.

Description

technical field [0001] The present invention relates to the technical field of wireless sensor network (WSN), in particular to a wireless sensor network node self-location method based on mobile anchor nodes. Background technique [0002] Wireless sensor network is a kind of wireless ad hoc network developed in recent years. Because of its ease of use, reliability, cost-effectiveness, and low power consumption, its application prospects are very broad. Many important fields such as hazardous areas and remote control have potential practical value, and are considered to be one of the technologies that will have a huge impact on the 21st century. [0003] Due to the uncontrollability of sensor nodes during deployment, the location of most nodes in the network cannot be determined in advance, and location information is crucial to the monitoring activities of sensor networks. Contains important information, monitoring messages without location information are often meaningles...

Claims

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Application Information

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IPC IPC(8): H04W64/00H04W84/18
Inventor 冯友兵金贺仲伟波朱志宇龚淼卞建秀
Owner 广西农垦昌菱农场有限公司
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