Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Indoor positioning method for receiving signal strength ordering fingerprint

A technology for receiving signal strength and indoor positioning, which is applied in wireless communication, wireless communication services, electrical components, etc., and can solve problems such as positioning errors and different received signal strengths

Inactive Publication Date: 2014-05-14
BEIJING UNIV OF TECH
View PDF3 Cites 42 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the indoor positioning technology using received signal strength, due to the software and hardware differences of different types of WiFi / mobile terminals, when accessing the same WiFi AP, the received signal strength may be different, resulting in positioning errors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Indoor positioning method for receiving signal strength ordering fingerprint
  • Indoor positioning method for receiving signal strength ordering fingerprint
  • Indoor positioning method for receiving signal strength ordering fingerprint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Taking an indoor room with a length and width of 5 meters and an environment covered by five wireless access points (APs) as an example, the specific implementation steps of the indoor positioning method provided by the present invention are described:

[0026] Step (1), first establish a Cartesian coordinate system based on the floor plan of the room, mark the origin as the first sampling point, and record it as the reference point 1 (0,0), and then establish a sampling point every one meter, so as to By analogy, 36 sampling points are marked all over the plan, that is, 36 reference points, such as figure 2 shown;

[0027] Step (2), when the terminal with WiFi function is at the reference point 1 (0,0), it can scan 5 access nodes AP. At this time, the WiFi terminal device can detect the received signal strength of AP1~AP5 at the sampling point Value RSSI, namely -66, -73, -100, -90, -80, unit: dBm;

[0028] Step (3), the terminal sorts the measured 5 RSSI values, an...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention, which belongs to the wireless positioning field, relates to an indoor positioning method for receiving a signal strength ordering fingerprint. The method comprises the following steps that: the number of sampling points spreading in a whole positioning area is determined; sampling point traversal is carried out, received signal strength indicator (RSSI) values of signal strengths of k wireless access points (AP) are obtained by detection at each sampling point, and arrangement is carried out to obtain an RSSI sequence, wherein each RSSI corresponds to one MAC address and the RSSI sequence ad the MAC addresses form sampling point position fingerprints jointly; the coordinates and the position fingerprints of the sampling points are stored into a fingerprint database; AP scanning is carried out at an unknown position to obtain a position fingerprint of an unknown position C and the MAC address sequence in the position fingerprint of the position C is matched with MAC address sequences of the position fingerprints of all sampling points in the fingerprint database; and a geographical coordinate corresponding to the sampling point with consistent matching is used as the current position of the unknown position C a. According to the invention, relative sequences of RSSIs of different APs are used as fingerprints and thus a positioning error caused by different RSSI absolute values by different wireless terminal scanning can be avoided.

Description

technical field [0001] The present invention relates to the field of wireless positioning, in particular to a WiFi indoor positioning method suitable for heterogeneous terminals. Background technique [0002] In recent years, with the rapid development of the mobile Internet and the rapid increase of data and multimedia services, people's demand for indoor positioning is increasing. In urban life, low-cost, high-precision indoor positioning has important practical significance: in supermarkets, by obtaining personal location information of consumers and target product location information, it is possible to guide routes and realize intelligent shopping guides; in sudden disasters On-site, through indoor positioning, rescuers can be guided to quickly rescue trapped people; in hospitals, the positioning and supervision of patients, doctors and medical equipment is conducive to improving efficiency. [0003] At present, GPS satellite positioning, which is widely used, can only...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04W4/04H04W64/00
Inventor 黎海涛吕海坤齐双
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com