WiFi tracking of pedestrian behavior
by Andreea-Cristina Petrea, Cristian Chilipireaa, Mitra Baratchib, Ciprian Dobrea, Maarten van Steen
In this chapter we explore how WiFi technology can be deployed for measuring pedestrian behavior . The basic idea is simple: WiFi-enabled devices regularly send messages containing a unique identifier for that device. A WiFi scanner receives those messages, which can then be processed further. Having a unique identifier enables us to (1) distinguish devices from each other, and (2) determine whether two scanners have observed the same device. In other words, we are capable of detecting devices. These two properties form the foundations for counting devices as well as tracking their locations when scanners are located at different places. If we know the ratio between devices and people, we can then draw conclusions on the movement of people.