Floor distinguishing method based on RSSI difference between floors

A discrimination method and inter-floor technology, applied in wireless communication services, electrical components, wireless communication, etc., can solve the problem of low accuracy of floor discrimination, achieve the effect of reducing the amount of calculation and improving accuracy

Inactive Publication Date: 2014-07-09
BEIJING UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem of low floor discrimination accuracy caused by RSSI positioning errors in multi-floor WiFi indoor positioning, the present invention proposes a floor discrimination method based on RSSI differences between floors to improve the floor judgment accuracy in WiFi indoor positioning

Method used

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  • Floor distinguishing method based on RSSI difference between floors
  • Floor distinguishing method based on RSSI difference between floors
  • Floor distinguishing method based on RSSI difference between floors

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] The environment of this embodiment is a 60*20m long and wide 2 There are three floors, each floor has 4 APs, 12 APs in total.

[0026] The flow chart of the floor discrimination method based on RSSI threshold is as follows figure 1 As shown, it specifically includes the following steps:

[0027] (1) First establish the Cartesian coordinate system of the three floor plans, such as image 3 As shown, the origin is marked as the first sampling point, which is recorded as the reference point 1(0,0,F 1 ). Afterwards, a sampling point was established every two meters, and so on, and a total of 240 sampling points were marked in the corridors of the three floor plans, that is, 240 reference points.

[0028] (2) Use a terminal with WiFi function to detect the RSSI value of the signal strength of 12 wireless access points AP at the m sampling point, ...

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Abstract

The invention relates to a floor distinguishing method based on the RSSI difference between floors. According to the method, in the indoor environment of multiple floors, the floor where a terminal is located is determined by the utilization of the characteristic that RSSI declines between the floors. Firstly, the floors where all APs are located are recorded, a mobile terminal with the WiFi function is used for collecting the RSSI of all the APs of the current position, and by counting the number of the APs of which the RSSI is greater than the threshold in each floor, the floor comprising the largest number of the APs of which the RSSI is greater than the threshold is determined to be the floor where the terminal is located currently. Compared with an ordinary global matching floor locating algorithm adopting signal fingerprints, the method has the advantages that a floor distinguishing algorithm based on the RSSI difference between the floors is added, the calculated quantity for locating the floors is decreased, and accuracy for distinguishing the floors is improved.

Description

technical field [0001] The invention relates to the field of wireless positioning, in particular to a floor discrimination method in multi-floor WiFi positioning based on differences in received signal strength indications (RSSI) between floors. Background technique [0002] In recent years, with the rapid development of wireless local area networks and the popularization of smart mobile terminals such as mobile phones, mobile users have an increasing demand for real-time and accurate location information. Mobile terminals such as mobile phones and notebooks continue to influence people's living habits through various applications. "Location" exists in every aspect of our life, and location-based services and their applications have received constant attention and have broad market value. Existing ones such as Dianping, WeChat, etc., they can recommend products and businesses based on people's location, and make friends in games. While these applications enrich our lives, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/04
Inventor 黎海涛齐双王奇
Owner BEIJING UNIV OF TECH
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