Dr. Stefano Scanzio
IEIIT-CNR
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Academic Career Length
21Years (2006-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications1 October 2007 in Speech Communication
Journal Article
RGRoberto Gemello
Roberto Gemello
FMFranco Mana
Franco Mana
Stefano ScanzioPLPietro Laface
Pietro Laface
RMRenato De Mori
Renato De Mori
17 October 2011 in IEEE Transactions on Industrial Informatics
Journal Article
Gianluca CenaIBIvan Cibrario Bertolotti
Ivan Cibrario Bertolotti
Stefano ScanzioAVAdriano Valenzano
Adriano Valenzano
CZClaudio Zunino
Claudio Zunino
EtherCAT is a real-time Ethernet protocol conceived explicitly for industrial applications. It is characterized by high communication efficiency, which permits control loops to be closed with short cycle times, and is provided with a suitable mechanism, known as distributed clock (DC), that enables synchronized operations to take place across the controlled system. These features can be profitably adopted, for instance, to support motion control applications. In this paper, the performance of the DC mechanism is evaluated by means of a thorough campaign of experimental measurements carried out on a real network setup. A number of factors have been taken into account that can affect accuracy and precision, and their effects studied in depth.
27 January 2016 in IEEE Transactions on Industrial Informatics
Journal Article
The adoption of wireless communications and, in particular, Wi-Fi, at the lowest level of the factory automation hierarchy has not increased as fast as expected so far, mainly because of serious issues concerning determinism. Actually, besides the random access scheme, disturbance and interference prevent reliable communication over the air and, as a matter of fact, make wireless networks unable to support distributed real-time control applications properly. Several papers recently appearing in literature suggest that diversity could be leveraged to overcome this limitation effectively. In this paper, a reference architecture is introduced, which describes how seamless link-level redundancy can be applied to Wi-Fi. The framework is general enough to serve as a basis for future protocol enhancements, and also includes two optimizations aimed at improving the quality of wireless communication by avoiding unnecessary replicated transmissions. Some relevant solutions have been analyzed by means of a thorough simulation campaign, in order to highlight their benefits when compared with conventional Wi-Fi. Results show that both packet losses and network latencies improve noticeably.
1 February 2021 in Computers in Industry
Journal Article
23 January 2015 in IEEE Transactions on Industrial Informatics
Journal Article
Gianluca CenaStefano ScanzioAVAdriano Valenzano
Adriano Valenzano
CZClaudio Zunino
Claudio Zunino
This paper describes reference broadcast infrastructure synchronization (RBIS), a clock synchronization protocol for IEEE 802.11 infrastructure wireless networks. The protocol is especially tailored for industrial and home automation networks, and in many application contexts, it offers several advantages compared with other solutions targeted at similar purposes. RBIS has been conceived to rely on conventional Wi-Fi equipment and, in particular, on unmodified access points. It is based on the master/slave approach and follows the receiver/receiver paradigm. An implementation of RBIS-carried out completely in software and based on timestamps taken at the interrupt handler level-has been developed, which achieves a synchronization error below 3 μs. Then, a simple distributed hard real-time control application has been setup, which consists in two PCs running real-time application interface for Linux (RTAI) and connected through Wi-Fi. The actuation error, measured on the generation of synchronous pulses, is strictly below 13 μs.
6 September 2011 in IEEE Transactions on Industrial Informatics
Journal Article
MCMarco Cereia
Marco Cereia
IBIvan Cibrario Bertolotti
Ivan Cibrario Bertolotti
Stefano ScanzioThe adoption of open-source operating systems for the execution of real-time applications is gaining popularity, even in the networked control systems domain, due to cost and flexibility reasons. However, as opposed to their commercial counterparts, the actual performance level to be expected from them is still little known and may often depend on the kind of real-time extension being used, its configuration, and the overall software load of the system, including best-effort components. In this paper, an open-source EtherCAT master supported by a popular real-time extension for Linux, the RT Patch, is thoroughly evaluated with long-term measurements, which build confidence on the suitability of the proposed approach for real-world applications. Special attention is devoted to the unexpected, adverse effect that some best-effort components, for instance, graphics applications, may have on the overall real-time characteristics of the system. For reference, the proposed approach is also compared with RTAI, a more traditional and well-known real-time extension for Linux already in use for demanding applications.
About Me
Stefano Scanzio received Laurea and Ph.D. degrees in computer science from Politecnico di Torino, Turin, Italy, in 2004 and 2008, respectively. From 2004 to 2009, he was with the Department of Computer Engineering, Politecnico di Torino, where he was involved in research on speech recognition and in classification methods and algorithms. Since 2009, he has been with the National Research Council of Italy, where he is currently a tenured researcher with the institute CNR-IEIIT, Turin.
He teaches several courses on computer science at Politecnico di Torino. He has authored and co-authored more than 70 papers in international journals and conferences, in the areas of industrial communication systems, real-time networks, wireless networks, and clock synchronization protocols. He served as the TCP co-chair of the 2019 edition of the International Conference on Ad Hoc Networks and Wireless and as the Work-in-Progress Co-Chair of the 2018 edition of the IEEE International Workshop on Factory Communication Systems.
He received the 2017 Best Paper Award of the IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS and the Best Paper Awards for three papers presented at the IEEE Workshops on Factory Communication Systems in 2010, 2017, and 2019, and for a paper presented at the IEEE International Conference on Factory Communication Systems in 2020.
He is an associate editor of the Ad Hoc Networks (Elsevier) and of the IEEE Access journals.