Prof. Francesco Gringoli
Lecturer Prof. Francesco Gringoli
(Università degli Studi di Brescia)
Title Dead on Arrival: An Empirical Study of Bluetooth 5.1 Positioning System
Date Tuesday, 23 July 2019, 16:15h
Location S4|14, Mornewegstraße 26-32, Darmstadt
Room 5.3.01
The recently released Bluetooth 5.1 specification claims fine-grained positioning capabilities, which is deemed essential to context-/location-based Internet of Things (IoT) applications. We evaluate experimentally, for the first time, the accuracy of a positioning system based on the Angle of Arrival (AoA) mechanism adopted by the Bluetooth standard. We first scrutinize the fidelity of angular detection and then assess the feasibility of using angle information from multiple fixed receivers to determine the position of a device. Our results reveal that angular detection is limited to a restricted range. On the other hand, even in a simple deployment with only two antennas per receiver, the AoA-based positioning technique can achieve sub-meter accuracy. We then demonstrate that a malicious device may be able to easily alter the truthfulness of the measured AoA by tampering with the packet structure. To counter this protocol weakness, we propose simple remedies that are missing in the standard, but which can be easily adopted by manufacturers for securing the Bluetooth 5.1 positioning system.
Francesco Gringoli is Associate Professor of Telecommunications at the Dept. of Information Engineering of the University of Brescia, Italy. His current research interests include performance evaluation and medium access control in Wireless LANs, statistical classification of network traffic, and high-speed packet inspection. In wireless networking, he gained public attention with OpenFWWF project which allowed many researchers throughout the world to deploy for the first time large testbed of inexpensive prototypes. He counts a great number of collaborations with Universities (including Trinity College Dublin, University of Edinburgh, UPF, IMDEA Networks Institute, TU Darmstadt) and the industry (Alcatel Lucent, ZyXEL, Juniper, Adant Tech). He has been actively participating to FP7 and H2020 European projects, and he got several distinctions.