Multi-user-side online cooperative positioning system

Abstract

The invention discloses a multi-user-side online cooperative positioning system, and belongs to the technical field of communication and wireless networks. According to the method, the certainty of the candidate position set of each user side is evaluated, so that the user with high candidate position set certainty is helped to calibrate the user with low candidate position set certainty, and the overall positioning effect of a collaborative group is improved; through a collaborative group division module, different final positioning schemes are adopted for positioning users according to conditions, so that the maximization of positioning efficiency and positioning accuracy is realized; and mutual calibration is achieved by using the signal vectors and the positions of the multiple user sides, due to the fact that information gains among the multiple user sides are utilized, positioning information can be increased under the condition that extra hardware equipment is not added, and accurate positioning of the user sides by the system is better facilitated.

Description

technical field [0001] The invention belongs to the technical field of communication and wireless network, and more specifically relates to an online coordinated positioning system for multiple clients. Background technique [0002] Studies have shown that humans spend more than 80% of their time indoors, so indoor positioning services are becoming more and more important. Due to signal blocking and non-convergence problems, GPS that is widely used outdoors cannot be well adapted to indoor environments. For indoor environments, scholars have proposed many methods based on different sensors of smartphones such as infrared, Bluetooth, and Wi-Fi. Among them, due to the ubiquity of Wi-Fi modules, fingerprinting based on Wi-Fi Received Signal Strength (RSS) has become a research focus in recent decades. [0003] Fingerprint-based positioning systems are usually divided into two stages, one is the offline stage and the other is the online stage. In the former, full-time personn...

AI Technical Summary

Problems solved by technology

Although some scholars have proposed co-location methods as early as a few years ago, they basically use some additional hardware devices such as Bluetooth and acoustic signals to measure the proximity or distance between multiple users.

In actual deployment, such an approach has two major disadvantages: one is the scarcity of interactive devices in smartphones, and the other is that direct communication involves security and privacy

Although experiments have demonstrated its superiority, such online calibration is performed on a per-user basis, and the potential relationship between collaborative online users has not been fully exploited

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