Distributed type node drift detection method and device

A distributed node, drift detection technology, applied in measurement devices, radio wave measurement systems, instruments, etc., can solve the problem of large computational load in the node drift detection process

Inactive Publication Date: 2017-01-11
河南省烟草公司洛阳市公司 +1
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[0007] The purpose of the present invention is to provide a distributed node drift detection m...

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  • Distributed type node drift detection method and device
  • Distributed type node drift detection method and device
  • Distributed type node drift detection method and device

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

[0045] Embodiment of a distributed node drift detection method of the present invention

[0046] A wireless signal is an electromagnetic wave signal. Considering the received signal strength indicator of an isotropic spherical wave, the unit is dBm. During the propagation process, part of the energy will be absorbed by the propagation medium, and the strength will decay exponentially with the distance. Commonly used wireless signal propagation path loss models include: free space propagation model, two-wire ground reflection model, and logarithmic distance path loss model, among which the logarithmic distance path loss model is most widely used. The logarithmic distance path loss model consists of two parts. The first one is the pass loss model, which can predict the received signal power when the distance is d, expressed as Use a distance...

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Abstract

The invention relates to a distributed type node drift detection method and a distributed type node drift detection device and belongs to the technical field of wireless sensor network. The distributed type node drift detection method includes: firstly, collecting RSSI (received signal strength indicator) data of communication of beacon nodes and the rest beacon nodes according to set time intervals; calculating RSSI variation of the neighboring sampled beacon nodes to acquire a time sequence G of the RSSI variation of the beacon nodes and then performing linear fitting on the time sequence G of the RSSI of the beacon nodes to acquire a fitted regression line of the timing sequence of the RSSI variation; finally, judging whether difference value between the fitted value on the fitted regression line of the timing sequence of the RSSI variation of the beacon nodes is greater than the set threshold and corresponding actual value is greater than a set threshold or not, if yes, determining that the corresponding beacon nodes shift. The beacon nodes possibly shift can be judged out automatically by calculating the RSSI variation at different time, simpleness is achieved, and high practicability is realized.

Description

technical field [0001] The invention relates to a distributed node drift detection method and device, belonging to the technical field of wireless sensor networks. Background technique [0002] The wireless sensor network is a network system composed of a large number of stationary or mobile sensor nodes deployed in the monitoring area in a self-organizing and multi-hop manner. The sensor nodes cooperate with each other to perceive, collect and process the information of the monitoring objects in the network coverage area. and sent to observers. Wireless sensor networks do not require any fixed network support. They have the characteristics of rapid deployment, strong invulnerability, and long working life cycle. They have broad application prospects in the field of complex and large-scale monitoring and tracking tasks. [0003] In practical applications, since the number of nodes in wireless sensor networks is usually very large, and the nodes are often deployed randomly, ...

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Application Information

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IPC IPC(8): H04W24/08H04W64/00H04W84/18G01S5/02
CPCH04W24/08G01S5/0252H04W64/003H04W84/18
Inventor 赵世民王惠孔德辉董昆乐王俊李瑞芳
Owner 河南省烟草公司洛阳市公司
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