ScaleLoc: A Scalable Real-Time Locating System for Moving Targets
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.
KeywordsRTLS location estimation simulation discrete event system
Unable to display preview. Download preview PDF.
- 1.Ni, L.M., Liu, Y., Lau, Y.C., Patil, A.P.: LANDMARC: Indoor Locating Sensing Using Active RFID. In: The First IEEE International Conference on Pervasive Computing and Communications, pp. 407–415 (2003)Google Scholar
- 2.Priyantha, N.B., Chakraborty, A., Balakrishnan, H.: The Cricket Location-Support System. In: 6th ACM International Conference on Mobile Computing and Networking, Boston (2000)Google Scholar
- 3.Bahl, P., Padmanabhan, V.N.: RADAR: An In-Building RF-based User Location and Tracking System. In: 9th Annual Joint Conference of the IEEE Coumputer and Communication Societies, vol. 2, pp. 775–784 (2000)Google Scholar
- 4.Fontana, R.J., Gunderson, S.J.: Ultra-wideband precision asset location system. In: Digest of IEEE conference on Ultra Wideband Systems and Technologies, pp. 147–150 (2002)Google Scholar
- 7.IEEE Computer Society, Part 15.4: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (WPANs) Amendment 1: Add Alternate PHYs (2007)Google Scholar
- 9.Kim, T.G.: DEVSim++ User’s Manual: C++ Based Simulation with Hierarchical Modular DEVS Model, Computer Engineering Lab. Dept. of Electrical Enginerring, KAIST (1994)Google Scholar