Indoor positioning method, system and positioning platform

Abstract

The invention discloses an indoor positioning method and system and a positioning platform, and relates to the technical field of positioning of the mobile Internet. The method includes: obtaining prior probability of wireless signal strength detected at reference points according to the wireless signal strength of a positioned terminal and a signal strength probability distribution diagram of the reference points; obtaining posterior probability according to the prior probability and based on a Bayesian decision; and multiplying the posterior probability with a matrix of transition probability of the reference points, and outputting the reference point with the maximal transition probability as a positioning result of the positioned terminal. The method, system and platform build the indoor wireless signal strength probability distribution diagram through a transfer HMM model to realize a universal method for accurate positioning, and by combination of a wireless signal strength acquisition and preprocessing mechanism and a probability distribution matching method based on the transfer HMM model, an indoor accurate positioning service with good experience can be provided to a user.

Description

technical field [0001] The invention relates to the technical field of mobile internet positioning, in particular to an indoor positioning method, system and positioning platform. Background technique [0002] At present, there are already WiFi (Wireless Fidelity, wireless fidelity), wireless base station signals (such as GSM (Global System of Mobile communication, Global System for Mobile Communications), CDMA2000 (Code Division Multiple Access, code division multiple access) or WCDMA (Wideband Code Division Multiple Access, broadband code division multiple access)) , Bluetooth, RFID (Radio Frequency Identification, radio frequency identification), ultrasound and other wireless signal sources to achieve indoor positioning methods and systems are under research and initially put into application. [0003] However, these methods or systems all have some deficiencies or limitations: either the positioning accuracy is not enough (such as wireless base station signals), or addit...

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Problems solved by technology

[0003] However, these methods or systems all have some deficiencies or limitations: either the positioning accuracy is not enough (such as wireless base station signals), or additional hardware devices need to be installed (such as RFID, ultrasound), or the physical range of the application is limited (such as Bluetooth’s The transmission distance is generally only tens of meters), etc.

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