Cloud/Fog/Mist Computing for Time-Critical Applications

Resource Allocation and Scheduling Challenges


Helen D. Karatza

Professor Emeritus

Department of Informatics

Aristotle University of Thessaloniki, Greece



In the recent years, due to the exponential growth of the Internet of Things (IoT) applications and the development of smart environments, the traditional Cloud computing is insufficient for transferring the huge volume of data generated by IoT devices. As a result, Fog and Mist computing  have appeared as new computing paradigms to solve the problem of transmission latency by placing computations in the vicinity of the IoT. Fog computing extends the cloud to the network edge, closer to where the IoT data are generated. Mist computing is a lightweight form of fog computing, that brings fog capabilities even closer to the IoT layer. Typically, the IoT applications are time-critical and the primary concern is meeting deadlines. Consequently, appropriate resource allocation and scheduling policies are required to exploit the full potential of cloud, fog and mist computing environments. In this keynote we will explore research directions driving the development of these new computing paradigms. Furthermore, novel techniques addressing the challenges in resource allocation and scheduling in cloud, fog and mist computing environments will be presented and analysed.


Bio: Helen D. Karatza (senior member of IEEE, ACM, SCS) is a Professor Emeritus in the Department of Informatics at the Aristotle University of Thessaloniki, Greece. Dr. Karatza's research interests include cloud, fog and mist computing, energy efficiency, fault tolerance, resource allocation, scheduling algorithms and real-time distributed systems. Dr. Karatza has authored or co-authored over 240 technical papers and book chapters, including seven papers that received the best paper award at international conferences. She served as an elected member of the Board of Directors at Large of The Society for Modeling and Simulation International. She served as chair and keynote speaker in international conferences. Dr. Karatza is the Editor-in-Chief of the journal “Simulation Modelling Practice and Theory” (Elsevier), an Editor of “Future Generation Computer Systems” (Elsevier), an Associate Editor of “IEEE Transactions on Services Computing” and an Editor of “Cluster Computing” (Springer). She also served as Editor-in-Chief of “Simulation Transactions of The Society for Modeling and Simulation International”, Associate Editor of “ACM Transactions on Modeling and Computer Simulation” and Senior Associate Editor of the “Journal of Systems and Software” (Elsevier). She served as Guest Editor of Special Issues in several international journals. More info about her activities and publications can be found at: