Mixed positioning system guaranteeing the continuity of indoor/outdoor tracking

Global Positioning System (GPS) or Global Navigation Satellite System (GNSS) are not always the best positioning systems, particularly in indoor environments. This explains the emergence of other indoor positioning systems, such as Wireless Fidelity (Wi-Fi). This latter is based on the trilateration technique to determine the position of an object through reference points. To optimize the outdoor as indoor localization, the system integrates three different systems GPS, Wi-Fi and the Simultaneous Localization And Mapping (SLAM), using a coefficient of confidence that can qualify the accuracy and the quality of the positioning data. The idea comes from relay race sport where each player passes the baton to the nearest player of the same team. In our case, it is the transition from the outside positioning system to the inside one. The solution enables to switch from a system to another without producing a sudden “jumping” and creates a “unified environment” between the three systems.