Research on indoor/outdoor state switching based on smart phone and GNSS satellite status information

Smart phones have became one of the must-have items for modern people. The demand for location-based services is also increasing, and smart phones follow people more frequently indoor or outdoor. In an outdoor or indoor scene, it is especially important that the smart phone recognizes the current state and uses the appropriate positioning method for positioning. This paper proposes a method for judging the indoor/outdoor state of a smart phone to the greatest extent, using only Global Navigation Satellite System (GNSS) satellite state information. The method proposed in this paper guarantees the applicability and accuracy of many occasions as much as possible. We perform data collection and comparison results in multiple environments. In the comparison, the applicability and accuracy of the multi-scenario for indoor/outdoor state judgment are highlighted. The method of judgment in this paper provides a basis for switching indoor/outdoor seamless positioning.