Title :
Reliable ranging technique based on statistical RSSI analyses for an ad-hoc proximity detection system
Author :
Nakamura, Keiichi ; Kamio, Masato ; Watanabe, Tetsushi ; Kobayashi, Shinsuke ; Koshizuka, Noboru ; Sakamura, Ken
Author_Institution :
Grad. Sch. of Interdiscipl. Inf. Studies, Univ. of Tokyo, Tokyo
Abstract :
We propose a proximity detection system that supports pedestrian traffic. Active radio tags are utilized for building the system to reduce the overall system cost. But accurate ranging based on utilizing active radio tags only is difficult to achieve, since the RSSI is affected by small-scale fading of a radio signal in real-world environments. In this paper, 4 simple statistical RSSI filtering methods and a packet exchange protocol for reducing the fading effect are proposed. Combinations of proposed methods are thoroughly experimented in real-world environments and discussed for determining the best combination for the system. Our results show that the variation of detecting distance is successfully reduced to 4 meters for particular combinations.
Keywords :
ad hoc networks; filtering theory; statistical analysis; traffic engineering computing; active radio tags; ad hoc proximity detection system; fading effect; packet exchange protocol; pedestrian traffic; radio signal; real-world environment; reliable ranging technique; small-scale fading; statistical RSSI analysis; statistical RSSI filtering; Bicycles; Costs; Fading; Filtering; Information analysis; Protocols; Radar detection; Radio propagation; Routing; Vehicles;
Conference_Titel :
Pervasive Computing and Communications, 2009. PerCom 2009. IEEE International Conference on
Conference_Location :
Galveston, TX
Print_ISBN :
978-1-4244-3304-9
Electronic_ISBN :
978-1-4244-3304-9
DOI :
10.1109/PERCOM.2009.4912870