A positioning method and device

Abstract

The present invention relates to the technical field of communications, and disclosed in the embodiments thereof are a positioning method and device, which may carry out a positioning function without changing the design of a WiFi chip and may avoid the problem wherein the position of a station (STA) is leaked. The specific solution is as follows: an STA carries out information interaction with at least three access points (AP) so as to obtain transmission time information corresponding to each AP, wherein the MAC addresses used by the STA to carry out information interaction with each AP are different from each other, and the transmission time information corresponding to each AP comprises a time when the AP sends a first measurement message, a time when the STA receives the first measurement message, a time when the STA sends a first acknowledgement message and a time when the AP receives the first acknowledgement message; and the STA calculates the position of the STA according to the transmission time information corresponding to each AP and position information of the at least three APS. The embodiments of the present invention are thus applied to the process wherein the STA carries out information interaction with the AP so as to obtain the position of the STA.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to a positioning method and device. Background technique [0002] A wireless fidelity (Wireless Fidelity, WiFi) technology is a short-distance wireless communication technology. The structure of the WiFi technology includes a central node called an access point (Access Point, AP) and other nodes called stations (Station, STA). [0003] Wherein, the STA may use a Fine Time Measurement (Fine Time Measurement, FTM) technology to perform information exchange with at least three APs through a WiFi network to achieve positioning. Specifically, an AP is taken as an example here to illustrate the interaction process between the STA and the AP: the AP sends the first measurement message to the STA at time t1, the STA receives the first measurement message at time t2 and feeds back a confirmation message to the AP at time t3, After receiving the confirmat...

AI Technical Summary

Problems solved by technology

In this way, the AP cannot obtain the correct time difference between time t2 and time t3, and thus cannot obtain the correct position of the STA

[0006] However, since the STA needs to adjust its own time (that is, increase the random number) when sending a confirmation message to the AP after a period of time randomly set; The design, modify the underlying processing mechanism, and add additional processing functions; and the added processing functions can only be realized on new devices, and the design of many existing WiFi chips in old devices cannot be modified, so the existing Technical approach lacks versatility

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