Mobile terminal indoor location method and device

Abstract

The embodiment of the invention provides a mobile terminal indoor location method and device. The method comprises the following steps: offline acquiring signal intensity information respectively corresponding to multiple preset sampling points in one spatial position as fingerprint point signal information; according to the fingerprint point signal information, constructing a location fingerprintdatabase; acquiring displacement motion initial state information of the mobile terminal in the currently preset unit time; calculating a reference position of a displacement termination position byutilizing an inertial navigation principle and utilizing the displacement motion initial state information of the mobile terminal; and acquiring signal intensity information, respectively corresponding to preset unit time points on a displacement motion track, of the mobile terminal, constructing a sparse fingerprint location model based on spatial position constraint, correcting the reference position of the displacement termination position, and acquiring a corrected position of the displacement termination position. The embodiment of the invention realizes relatively high location accuracywith relatively low cost.

Description

technical field [0001] The present invention relates to the technical field of mobile Internet, in particular to an indoor positioning method and device for a mobile terminal. Background technique [0002] With the rapid development of computer software and hardware technology, the rapid popularization of wireless networks, and the wide application of mobile smart terminal equipment, the mobile Internet has been more and more widely used, and the application demand based on location services has shown a rapid and substantial growth trend, and Because it can provide accurate positioning information for target positioning, emergency rescue, traffic management, etc., it has been gradually applied to various fields of social production and life, and has shown good technical development prospects and huge application market space. Reliable and efficient positioning technology is the premise and key to realize location-based services. [0003] Tool software and mobile services ba...

AI Technical Summary

Problems solved by technology

[0007] (2) The method based on ultrasonic technology: This method has high positioning accuracy and relatively simple structure, but is easily affected by temperature changes, has a relatively limited range of action, and requires a large number of underlying hardware foundations, resulting in high development costs

[0008] (3) The method based on light technology: This method has high positioning accuracy and simple structure, but it is only suitable for line-of-sight propagation, and is susceptible to interference from fluorescence, sunlight, etc., and has high requirements for the application environment

[0010] (5) The method based on ultra-wideband technology: this technology has the advantages of insensitivity to channel fading, high positioning accuracy, non-line-of-sight propagation, strong anti-interference ability, and strong penetration ability, but the system is expensive and difficult to popularize and apply

[0011] (6) The method based on Bluetooth technology: In view of the fact that the Bluetooth module has been widely embedded in various terminal devices, its hardware deployment cost is low, but the positioning accuracy is not high, the positioning delay is large, and the transmission range is limited

[0012] (7) The method based on wireless local area network technology: this method uses the received signal strength information to achieve positioning, without adding additional equipment, and the deployment cost is low, but the position identification of signal strength is limited, and the interference between the same frequency and adjacent frequency is large

[0013] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: for the actual application requirements of location-based services, in view of the limitations of existing technologies and the uncertainty of the indoor environment, real-time, high-precision indoor positioning Still facing some challenges, this is a technical problem to be solved urgently by those skilled in the art, and further in-depth research is still needed

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