ScaleLoc: A scalable real-time locating system for moving targets

Abstract

In this paper an inexpensive, low-power and scalable location system for mobile objects under indoor environments, ScaleLoc, is proposed and its performance is evaluated by simulation. IEEE 802.15.4a (Chirp spread spectrum) protocol is adopted and the location of a target is determined with trilateration. As the number of mobile objects increases, the performance may deteriorate due to communication collisions. For graceful degradation and system scalability, an arbitration scheme is adopted. Sufficient information for localization such as the node-ids and locations of reference nodes is supplied by arbitration nodes. © 2011 Springer-Verlag.