The active badge location system
ACM Transactions on Information Systems (TOIS)
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Tracking human motion in an indoor environment
ICIP '95 Proceedings of the 1995 International Conference on Image Processing (Vol. 1)-Volume 1 - Volume 1
Indoor tracking in WLAN location with TOA measurements
Proceedings of the 4th ACM international workshop on Mobility management and wireless access
Sensor Measurements for Wi-Fi Location with Emphasis on Time-of-Arrival Ranging
IEEE Transactions on Mobile Computing
Measuring round trip times to determine the distance between WLAN nodes
NETWORKING'05 Proceedings of the 4th IFIP-TC6 international conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communication Systems
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This article presents a novel technique to track WLAN terminals based on Time of Arrival (TOA). The objective of this research is enhancing the accuracy and availability of Newton-based WLAN positioning. Two tracking algorithms have been designed for this purpose. Results obtained from simulations run using true ranging observables demonstrate the suitability of the proposed algorithms. This technique allows the tracking of mobile terminals in real-time indoors with around 1.5m of error with three access points at sight. Additionally, tracking with only two access points is possible with an accuracy drop of around 1m. Other advantages of the proposed solution include its flexibility of deployment and cost-effectiveness.