Passive wireless signal acquisition and positioning method for intelligent mobile terminal
An intelligent mobile terminal, wireless signal technology, applied in wireless communication, service based on location information, service based on specific environment, etc., can solve problems such as difficulties and achieve the effect of ensuring effectiveness and security
Inactive Publication Date: 2020-02-04
HUNAN AGRICULTURAL UNIV
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Problems solved by technology
However, the biggest shortcoming of these methods and systems is the need for user collaboration, that is to say, users are required to actively upload data
This is almost impossible for large-scale public social activities, such as large-scale concerts, where participants come from all over the world and are not familiar with each other, so it is very difficult to ask them to provide collaboration
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[0038] The method of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0039] The present invention proposes a wireless signal detection scanning method capable of capturing the WiFi / Bluetooth wireless signal request connection control frame periodically transmitted by an intelligent mobile terminal, so as to realize a positioning method based on passive wireless detection signal strength, and its flow chart is as follows figure 1 shown. This method does not require the cooperation of intelligent mobile terminals, and has the characteristics of high precision, simple and fast deployment, etc.
[0040] The present invention realizes through following technical scheme:
[0041] Step 1: the present invention utilizes the wireless network card of Linux to work in the Monitor monitoring mode to periodically capture network data packets, then recognizes the Probe control frame, that is, the detection control fra...
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The invention discloses a passive wireless signal collection and positioning method for a smart mobile terminal. The method comprises the steps of 1, periodically transmitting a WiFi / Bluetooth wireless signal request control frame (or detection request frame) for the smart mobile terminal to perform passive wireless signal detection scanning; 2, performing position subdivision on a geographic space according to spatial arrangement, then sequentially using a wireless signal detection scanning module to collect wireless signal information according to position, and using a histogram feature extraction technology to extract a wireless signal strength histogram feature value to build a passive wireless signal fingerprint database; 3, updating the fingerprint database built in the second step by using smart mobile terminal random report position information fused with wireless detection scanning information; and 4, performing Euclid's shortest distance positioning computation based on the passive wireless detection signal strength. The method is high in precision and simple and rapid to deploy, without user cooperation. Therefore, the method can be widely applied to large public social activities.
Description
technical field [0001] The invention belongs to the technical fields of computer software and wireless signal data acquisition and extraction, intelligent mobile terminal software and positioning algorithm, and relates to a passive wireless signal collection and intelligent mobile terminal positioning method. Background technique [0002] In recent years, with the wide application of wireless communication technology and intelligent mobile terminals, the application of mobile LBS (location based service, location-based service) develops rapidly. LBS refers to a form of positioning and navigation fusion service that determines the geographical location of mobile users through the cooperation of mobile terminals and wireless networks, thereby providing user-required and location-related service information. [0003] LBS technology can be generally classified into several categories, GNSS technology (such as satellites, etc.), wireless positioning technology (wireless communica...
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IPC IPC(8): H04W4/33H04W4/02H04W64/00H04B17/318
CPCH04B17/318H04W4/023H04W4/025H04W4/80
Inventor 唐小勇廖肖依廖桂平
Owner HUNAN AGRICULTURAL UNIV