Hello, everyone.
I have a question regarding RF fingerprinting. I don't quite understand what exactly it does or what it is for.
My book says the following:
In a normal environment, the APs and clients exist in buildings where physical objects, such as walls, doors, windows, furniture, cubicles, and shelving, also exist and get in the way of the RF signals. Usually, the signals can pass through various materials but get attenuated along the way. That further complicates determining device location accurately.
The Cisco approach is to leverage RF fingerprinting, where each mapped area is influenced
by an RF calibration template that more closely resembles the actual signal attenuation expe-
rienced by the APs and clients. The calibration applied to a map can be manually determined
by walking through the area with a device and taking actual RF measurements. It can also
be applied through a set of models that represents how the construction of a mapped area
might affect signal propagation. Sample models include cubes and walled offices, drywalled
offices, indoor high ceilings, and outdoor open spaces.
What exactly is it trying to say? Do we basically tell our RTLS system that "hey, here is a wall, the signal attenuation might be this and that", etc?
Thank you.
David
