Paul J. Kühn
University of Stuttgart, Germany

The Use of Performance Modeling Methods for Energy-Efficiency
and QoS Management of ICT Systems and in Smart Grid Control"

Monday, Sept. 23, 2013

Abstract: Performance Modeling provides methods for resource abstractions, the desciption of system operation and its performance evaluation under stochastically changing load profiles. It has a long tradition in communication and computer system applications and has formed as basis for resource planning and system management for many decades. In the past, computer and communications systems have been designed and operated mainly for optimal resource planning (Capex costs) and system operation (Opex costs) to meet service level agreements (SLA) expressed by Quality of Service (QoS) and Quality of Experience (QoE) metrics. Through the dramatic increase of computer capabilities by multi-core systems and required communication bandwidths for new services in the recent years new criteria of energy efficiency have to be faced to reduce the energy costs of ICT systems and to contribute to the global "greening" of technology. These new challenges need not necessarily a complete methodically new beginning; resource consumptions can be well estimated through the performance analysis and can be used for energy-efficiency estimations. The clear understanding of model parameters, their mutual influence and interaction with system parameters, their quantitative expression and evaluation by system performance methods form an ideal basis for the organization of the system management and, especially, as a central module in any optimization algorithm to meet not only energy-efficiency but simultaneously also SLA requirements. Several examples of mobile/wireless communication channels, data center operation and distributed cloud data centers will be addressed in the keynote how performance modeling can be applied for energy-efficient system operation under strict SLA requirements. The methodology is applicable the same way for the control part of the smart energy grid, where actual sensoric quantities of phasors, energy consumptions or energy flow requirements have to be communicated for stability control under hard real-time conditions.

Short bio: Paul J. Kühn is Full Professor of Communication Networks and Computer Engineering at the University of Stuttgart, Germany, in the Faculty of Computer Science, Electrical Engineering and Information Technology. His teaching and research areas are Network Architectures and Protocols, Computer Engineering, Coding Theory and Performance Modeling and Queuing Theory. His current research interests are energy-efficient management of ICT systems. In his scientific career, he published more than 150 papers and has supervised more than 80 doctoral students. He has been appointed Professeur Associé at the ENST Paris and serves currently as Visiting Professor at the German University in Cairo (GUC) where he acted as Founding Dean of the Faculty of Information Engineering and Technology. He has been awarded the Dr.-Ing. Honorary degree from the Technical University of Dresden, Germany, and the Dr. h. c. degree from the Lund Institute of Technology, Lund, Sweden. He has received, among others, the Columbus Gold Meal of the City of Genoa, Italy, and the Philip-Reis Award for his contributions to communications and teletraffic engineering, and has been appointed Life Fellow of IEEE. He is member of the Heidelberger Academy of Science, the German National Academy Leopoldina, and the German Academy of Technical Sciences acatech.

Chip Elliott
Raytheon BBN Technologies, USA

"How Low Can We Go? The Frontiers of Green Computing"

Tuesday, Sept. 24, 2013

Abstract: Research in Green Information and Communication Technology (ICT) is widely recognized as one the most exciting fields in contemporary computer science research, both because of its direct and practical relevance to global warming and because, like security research, it cuts across all aspects of computing. This talk explores today’s frontiers of Green ICT, ranging from recent advances in the minimal quantum systems required for computing and communication, through the optimization of carbon and energy footprints for green clouds and emerging planetary-scale ICT systems.

Short bio: Chip Elliott is Principal Investigator for GENI, a nationwide suite of experimental infrastructure being created by the National Science Foundation for at-scale research in future internet architectures, services, and security. He is Chief Engineer at Raytheon BBN Technologies, Adjunct Professor at Dartmouth College, a Fellow of the AAAS and IEEE, and an active inventor with over 85 issued patents. Mr. Elliott has served on many national panels and has held visiting faculty positions at Tunghai University in Taiwan and the Indian Institute of Technology, Kanpur.

Pertti Jauhiainen
Network Technologies Unit, European Commission - Communications Networks, Content and Technology Directorate General (DG CONNECT)

"Energy efficiency in communication networks in Horizon 2020 perspective"

Wednesday, Sept. 25, 2013

Abstract: Overall the issue of energy efficiency in ICT in general is to keep the energy consumption levels under control, it will be difficult to reduce the ICT part of the overall energy consumption (approx. 3% today) as the use of ICT is so dramatically increasing. Communication networks energy consumption is growing rapidly, with approx. 80% of the energy consumed in the radio part of a mobile network, and a drastic need of a reduction of the radio network energy consumption is needed as more and more services are delivered by wireless technologies. But energy efficiency needs to be looked upon in the big picture, the networks need to be optimised in all parts. Data centres are handling a continuous increase in content, fixed and optical networks need to handle the high capacities needed, the new needed equipment and networks need to be designed with energy efficiency in mind. Internet of Thing, machine-to machine type of applications will lead to huge increase in energy consumption if not very low power devices and sensors are deployed. The presentation will address how these challenges will be taken up in the new EU framework programme for research and innovation, Horizon 2020.

Short bio: Pertti Jauhiainen is Project Officer in the area of Internet and broadband technologies, with specific responsibility for energy efficiency and satellite communication. He has worked within the research programmes in high-performance computing and communications technologies since 1997 at the European Commission (EC) in Brussels, Belgium. Before joining EC he has been working at Ericsson AB in Sweden (telecommunications), Epitec AB in Sweden and U.S (expert systems) and ABB A.G in Switzerland (condition monitoring of power plants). He received a Master of Science in Computer Science, University of Linköping, Sweden, 1986.