Auto building method and system of Wi-Fi position fingerprint map

Abstract

The present invention discloses an auto building method and system of a Wi-Fi position fingerprint map. The method comprises the steps of acquiring crowdsourcing data, building the Wi-Fi position fingerprint map by using a pedestrian navigation reckoning method and a machine learning method, and screening according to an indoor map to obtain Wi-Fi strength information with a position tag; and using the Wi-Fi strength information with the position tag as a training sample of a Gaussian process, so as to obtain a function relationship between the signal strength and the position information, resolving a super parameter in the Gaussian process, and predicting according to the super parameter so as to obtain Wi-Fi strength information of a poor constraint area of the indoor map. Regression is performed by using the Gaussian process, the Wi-Fi position fingerprint of a wide area is predicted based on the Wi-Fi position fingerprint information of a high constraint area of the map, so that the Wi-Fi position fingerprint map of the whole indoor area is built automatically.

Description

technical field [0001] The invention relates to the technical field of location services, in particular to a method and system for automatically constructing a Wi-Fi location fingerprint map. Background technique [0002] Wi-Fi location fingerprinting is a commonly used indoor positioning method. This method can use the existing wireless local area network infrastructure, and the positioning can be realized through a smart phone without requiring users to add additional equipment, so it is the most widely used. [0003] The existing Wi-Fi location fingerprinting method includes two steps of offline fingerprint collection and online positioning. The purpose of offline fingerprint collection is to build a Wi-Fi location fingerprint database for indoor areas. In the offline collection stage, it is necessary to collect data for a period of time at each collection point to improve the quality of the location fingerprint database. In the online positioning stage, the Wi-Fi signa...

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies in the prior art above, the purpose of the present invention is to provide a method and system for automatically constructing a Wi-Fi location fingerprint map, aiming at solving the problem that in the prior art only location fingerprints in areas with better map constraints can be obtained. , due to the poor accuracy of the pedestrian dead reckoning method of smartphones, it is impossible to obtain the location tag at the time of collecting location fingerprints

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