IPS is indoor (internal) positioning system. Since weak signals from GPS and GLONASS can not penetrate buildings here on Earth you end up with really crappy positioning if you’re indoors. IPS can change that and give you a much faster position fix and resolution. It mostly relies on WiFi signals to figure out where you are but there’s really no standard. It can also use Bluetooth or even near field communication signals provided there’s a database that knows where these signals are generated from.
Google for example just released an app that attempts to crowd source this effort. Users can download an app on their Android phone called Google Maps Floor Plan Marker. With this app users are asked (usually the venue owner) to move around the space after uploading a blueprint. The app uses map matching to calibrate the RF, and WiFi signals against the existing map uploaded by the venue owner to Google servers.
To help all this effort Broadcom has a brand new receiver called BCM4752 that supports surveying of all these signals on smartphones.
The Broadcom chip supports IPS through WiFi, Bluetooth, and even NFC. More importantly, though, the chip also ties in with other sensors, such as a phone’s gyroscope, magnetometer, accelerometer, and altimeter. Acting like a glorified pedometer, this Broadcom chip could almost track your movements without wireless network triangulation. It simply has to take note of your entry point (via GPS), and then count your steps (accelerometer), direction (gyroscope), and altitude (altimeter).via
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IPS: next generation of GPS for smartphones
ICT4PE&D
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