WIFI (Wireless Fidelity) positioning method

Abstract

The invention discloses a method for determining a WIFI (Wireless Fidelity) terminal position through an SSID (Service Set Identifier) and signal strength. An AP (Access Point) tells a terminal a position of the AP through information of an OID (Object Identifier), a three-dimensional position and standard signal strength carried in the SSID of a broadcast; the terminal combines measured signal strength of the AP through obtained three-dimensional position and standard signal strength which are decoded from the SSID to determine distance with the AP; the terminal can calculate an accurate self-position after collecting information of more than three strong enough signals; and the terminal can utilizes information of other APs to perform trimming and correction on the position as well. A WIFI positioning method has the advantages of being capable of rapidly achieving the signal positioning, being high in positioning accuracy compared with a method utilizing a spatial signal fingerprint technology, not needing frequently update spatial signal fingerprint information like the spatial signal fingerprint technology and reducing the maintenance costs.

Description

technical field [0001] The present application relates to a WIFI positioning method, in particular to a WIFI positioning method capable of performing position estimation and positioning within a designated area. Background technique [0002] Location-based service (LBS) is a new business model in the transition from 3G communication to 4G communication era. Deploying accurate and personalized business services for service providers through location-based services can greatly improve customer experience and facilitate business transactions. Therefore, It is one of the hot topics that have become popular recently, and it is also the target of attention of various venture capitalists. [0003] At present, WIFI positioning methods have inherent deficiencies, that is, it is difficult to use GPS time difference positioning to determine the location of the terminal, nor can it use the arrival time difference in mobile communication to complete positioning, and can only use signal s...

AI Technical Summary

Problems solved by technology

[0003] At present, the WIFI positioning method has inherent shortcomings, that is, it is difficult to use the time difference positioning of GPS to determine the position of the terminal, nor can it use the time difference of arrival in mobile communication to complete the positioning, and can only use the signal strength to complete the positioning

At present, the idea of ​​WIFI positioning is based on the method of spatial fingerprint. First, the signal strength of the point to be positioned is measured and recorded into the database. However, this method is inconvenient to operate and requires regular maintenance of the database. Because different WIFI access points will produce changes in strength and location, or will be turned off by the user, which will interfere with the spatial fingerprint

[0004] At present, the pilot construction of wireless cities is carried out in various parts of the country. The official WFI access point layout of operators should be relatively stable, but the database still needs to be maintained regularly

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