Is it possible to determine the location in a building by the strength of the WIFI signal?

Question

WiFi

There is a large building with several floors with a seamless WIFI network. Is it possible to organize tracking of the current location of clients connected to WIFI (such as location in a building)? The data is calculated based on the signal strength at different WIFI points.
In theory, this can be tracked on the client's device, because. it sees the signal strength of the dots and connects to the nearest one. Is there a way to do this on the server side?

Answer 1

The attenuation of the EM signal inside a building does not follow the inverse square law. There are a lot of unknowns to solve the problem like this "on the forehead". The material of surfaces, walls, doors, metal structures, power conductors, etc. will introduce distortion and interference.
The problem is only for the neural network. And this is still on the access points will have to be some kind of additional. Software to stand, which will measure the signal level from client devices. And even here there can be a scatter, because the transmitter power for each device will float and the picture will be only approximate.
Bottom line: when it’s really bad to do and there are resources, you can try to build something that can more or less accurately show which room the client is approximately in, but this is unlikely to be suitable for practical needs.

Answer 2

Don't know about others but cisco has it
https://www.cisco.com/en/US/docs/solutions/Enterpr...

Answer 3

A difficult task, since the signal does not go in an open field, but in a building where there will certainly be a lot of reflections. Wouldn't it be easier for you to use GPS?

Answer 4

The air is the same for everyone. You can measure the signal level of the client on the server in the same way as the client. Only here you did not take into account the fluctuations in the signal level. Therefore, such buildings usually use maps instead of direction finding.