Indoor positioning systems are becoming popular nowadays. Indeed, there is plenty of opportunities for real-time user navigation in GPS-denied environments. An interesting use cases are as follows: Fig. 1. Indoor navigation use cases There are several options for hardware (see It-Jim blog post). We have developed the positioning algorithm based on cheap Bluetooth beacons and built-in IMU sensors on a mobile device.
In our swarming world, it is quite hard to imagine someone having no mobile phone in the pockets of his jeans, her dress or their suits. Even the inveterate skeptic has to accept the fact that smartphones entered our life and have become its inalienable part, the part of us.