Why Zoning is preferable than Triangulation for Indoor RTLS
Performance and cost effectiveness of Zoning Real-time location
in comparison with Triangulation methods for indoor applications
The purpose of this article is to show why for indoor RTLS, a
zoning-based approach gives far more reliable results than the
respective triangulation-based methods, while at the same time
being more cost effective. RFID localization can be done either
by triangulation, i.e. using sophisticated algorithms to
localize the RFID tag based on compared readings by three or
more readers, or by zoning, i.e. allocating a reader to each
zone (room), tuning its gain in order to detect only tags in
said zone. This article will compare the cost effectiveness and
performances of these two approaches in outdoor and indoor
environments. Since the early days of active RFID, manufacturers
announced that they would be capable of accurately localizing
objects with only three readers, using RF triangulation
algorithms. More than ten years after