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Indoor area positioning method and system based on asynchronous sensing data

A technology of sensing data and positioning method, applied in the field of mobile computing to achieve the effect of reducing complexity

Active Publication Date: 2020-05-12
NANJING UNIV OF FINANCE & ECONOMICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Purpose of the invention: The indoor area positioning method and system based on asynchronous sensor data of the present invention can solve the problem of indoor positioning in asynchronous scenarios

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  • Indoor area positioning method and system based on asynchronous sensing data
  • Indoor area positioning method and system based on asynchronous sensing data
  • Indoor area positioning method and system based on asynchronous sensing data

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Embodiment Construction

[0034] The present invention will be further explained below in conjunction with the accompanying drawings. figure 1 It is a flowchart of an indoor area positioning method based on asynchronous sensor data provided by Embodiment 1 of the present invention. Such as figure 1 As shown, this embodiment includes the following steps:

[0035] Step 1. Given the divided target area and several fingerprint RSSI vectors, the divided target area is composed of several non-overlapping small areas, and there are several reference points in each small area, and each reference point Corresponds to a fingerprint RSSI vector the s ij is the received signal strength RSSI of the wireless communication device detected by the jth sensor, and d is the number of sensors.

[0036]Step 2: Given a user u, arrange the asynchronous sensing data corresponding to the user into a sequence χ according to the detection time. The basic form of the sequence is χ={1 , t 1 >,2 , t 2 >,...,i , t i >,...,n ...

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Abstract

The invention relates to an indoor area positioning method and system based on asynchronous sensing data. The method comprises the steps that asynchronous sensing data corresponding to a given user uis arranged into a sequence x according to the chronological order of detection time; according to a given time point l and a time interval delta(l), records obtained at the detection time in the interval (t-delta(t),t) are made into a subsequence x<t>; the weight of each record in the subsequence is calculated, and the subsequence is converted into a user RSSI vector; for each fingerprint RSSI vector, the similarity between the user RSSI vector and the fingerprint RSSI vector is calculated; and for each small area, the similarity between the user RSSI vector and the area is calculated, wherein the area most similar to the user RSSI vector is the stay area of the user u corresponding to x<t>. Through the indoor area positioning method and system, indoor positioning under an asynchronous scene is effectively realized.

Description

technical field [0001] The invention relates to the field of mobile computing, in particular to an indoor area positioning method and system based on asynchronous sensing data. Background technique [0002] Indoor positioning refers to the realization of position positioning in an indoor environment. At present, a variety of indoor positioning technologies have emerged. Among them, the fingerprint-based wireless positioning method has received extensive attention from all walks of life. The basic idea of ​​this method is to infer the location of the user according to the received signal strength (Received Signal Strength Indicator, RSSI) of the wireless communication device. However, most of the existing localization methods require sensors deployed in different locations to simultaneously detect wireless signals to determine the real-time location of the user. This not only needs to introduce a synchronization mechanism in the positioning system, but also accurately meas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/02
CPCG01S5/0252
Inventor 伍之昂曹杰方昌健
Owner NANJING UNIV OF FINANCE & ECONOMICS