TY - GEN
T1 - GPS and Electronic Fence Data Fusion for Positioning within Railway Worksite Scenarios
AU - Figueiras, Joao
AU - Grønbæk, Lars Jesper
AU - Ceccarelli, Andrea
AU - Schwefel, Hans-Peter
PY - 2012
Y1 - 2012
N2 - Context-dependent decisions in safety-critical applications require careful consideration of accuracy and timeliness of the underlying context information. Relevant examples include location-dependent actions in mobile distributed systems. This paper considers localization functions for personalized warning systems for railway workers, where the safety aspects require timely and precise identification whether a worker is located in a dangerous (red) or safe (green) zone within the worksite. The paper proposes and analyzes a data fusion approach based on low-cost GPS receivers integrated on mobile devices, combined with electronic fences strategically placed in the adjacent boundaries between safe and unsafe geographic zones. An approach based on the combination of a Kalman Filter for GPS-based trajectory estimation and a Hidden Markov Model for inclusion of mobility constraints and fusion with information from the electronic fences is developed and analyzed. Different accuracy metrics are proposed and the benefit obtained from the fusion with electronic fences is quantitatively analyzed in the scenarios of a single mobile entity: By having fence information, the correct zone estimation can increase by 30%, while false alarms can be reduced one order of magnitude in the tested scenario.
AB - Context-dependent decisions in safety-critical applications require careful consideration of accuracy and timeliness of the underlying context information. Relevant examples include location-dependent actions in mobile distributed systems. This paper considers localization functions for personalized warning systems for railway workers, where the safety aspects require timely and precise identification whether a worker is located in a dangerous (red) or safe (green) zone within the worksite. The paper proposes and analyzes a data fusion approach based on low-cost GPS receivers integrated on mobile devices, combined with electronic fences strategically placed in the adjacent boundaries between safe and unsafe geographic zones. An approach based on the combination of a Kalman Filter for GPS-based trajectory estimation and a Hidden Markov Model for inclusion of mobility constraints and fusion with information from the electronic fences is developed and analyzed. Different accuracy metrics are proposed and the benefit obtained from the fusion with electronic fences is quantitatively analyzed in the scenarios of a single mobile entity: By having fence information, the correct zone estimation can increase by 30%, while false alarms can be reduced one order of magnitude in the tested scenario.
UR - http://www.scopus.com/inward/record.url?scp=84871985958&partnerID=8YFLogxK
U2 - 10.1109/HASE.2012.30
DO - 10.1109/HASE.2012.30
M3 - Article in proceeding
SN - 978-1-4673-4742-6
VL - 1530-2059/12
T3 - I E E E International Symposium on High-Assurance Systems Engineering
SP - 17
EP - 23
BT - High-Assurance Systems Engineering (HASE), 2012 IEEE 14th International Symposium on
PB - IEEE Press
T2 - IEEE 14th International Symposium on High-Assurance Systems Engineering
Y2 - 25 October 2012 through 27 October 2012
ER -