How to design an experiment to collect real time positions of a walking person in a room/building every second? include:

[answerhappygod]

How to design an experiment to
collect real time positions of a walking person in
a room/building every second?
include:
hardware platform, components
(what sensors, etc.), software/coding language, experiment
procedures, how to collect the position data (e.g., sending to
cloud, or manually).
(I don't need actual results, just
answer to the question and the required equipment to obtain
results.)