When the world’s lifeforms are forced into subterranean dwellings due to nuclear fallout, evolution into lizard people or warming of the Earth, we will require a simple method for determining our position underground. In our current age, we are still working out the intricacies associated with determining our location in areas where GPS cannot reach.
SubPos is an open-source, Wi-Fi based, indoor positioning system that provides a solution to this problem, without the need for expensive licensing, specialised hardware, laborious area profiling or relying on data connectivity (a connection to a location database or cellphone coverage is not required), all while remaining backwards compatible with existing Wi-Fi access points and receivers.
The SubPos Standard defines an accurate method for subterraneous positioning in different environments by exploiting all the capabilities of Wi-Fi. Plug and play SubPos Nodes or existing Wi-Fi access points are used to transmit encoded information in a standard Wi-Fi beacon frame which is then used for position trilateration by a device of your choice (as long as it contains a Wi-Fi receiver). No more sending your position to external location providers when navigating indoors.
With development progressing, accuracy of up to +-0.5 meters is currently achievable in standard indoor environments. Further developments are being made to increase this accuracy using various techniques such as accurate beacon frame timing for time of flight, room zoning capabilities, dead reckoning and improved averaging functionality.
An additional, live demonstration with battery powered SubPos Nodes scattered about the presentation space will be shown. Audience members will be encouraged to try it out on their own devices by downloading an Android application.