Seminar Series on Advances in Telecommunications, Networking and Computing

This seminar series is organized by the Department of Telecommunications to provide unique opportunities to meet internationally recognized leading experts in the fields of Telecommunications, Networking and Computing. The lectures will be given in English by prominent foreign researchers from academia and industry, and they will be open to ALL interested colleagues, PhD students, and students. There is no fixed schedule for the seminar, but the lectures will be organized based on the availability of the invited lecturers, and they will be announced via various mailing lists. In addition, slides and up-to-date information on the program will be published on this site.

For further information, please, contact Dr. Levente Buttyán, Program Chair by e-mail (buttyan (at) or telephone (+36 1 463 1803).

Past years: 2009, 2010

Program in 2011

Date Lecturer Title Time Location
Feb 24 (Thu) Prof. Hideo Utsuno
Kyoto University, Japan
Interesting Examples of Wave Propagation 14:00 IB 110
May 17 (Tue) Dr. Sungoh Kwon
University of Ulsan, Korea
Energy-Efficient Routing for Multihop Wireless Networks 14:00 IB 110
Jun 17 (Fri) Prof. Jinting Wang
Beijing Jiaotong University, China
A multi-class preemptive priority cognitive radio system with random interruption discipline 10:00 IB 110
Jun 29 (Wed) Dr. Sonja Buchegger
KTH, Stockholm, Sweden
PeerSoN: Privacy-Preserving P2P Social Networks 10:00 IB 110
Sep 9 (Fri) Prof. Tansu Alpcan
TU Berlin and DT Labs, Germany
Decision and Game Theory for Network Security and Risk Management 11:00 IB 110

Planned seminars:

Date Lecturer Title

Google calendar for ATNC seminars

Program in details

Interesting Examples of Wave Propagation

Speaker   Prof. Hideo Utsuno, Kyoto University, Japan
Date and time   Feb 24, 2011, 14:00
Location   BME, Informatics Building, IB 110

Abstract: The presentation will consist of a general overview on the subject of wave propagation including examples. This will include both structural and acoustic propagation. Specific examples will include flexural wave propagation along a long cable, sound propagation through a perforated panel, and pulse wave propagation in a blood vessel.

Short bio: Professor Utsuno received his BSc degree from the Department of Aeronautics at Nagoya University in 1980. He received his MSc and PhD in 1982 and 1984, respectively, from the Department of Aeronautics at Tokyo University. He was employed in the Mechanical Engineering Research Laboratory at Kobe Steel, Ltd. as from 1982. Since 2003 he has been Associate Professor at Kyoto University in the Department of Mechanical Engineering and Science.

Energy-Efficient Routing for Multihop Wireless Networks

Speaker   Dr. Sungoh Kwon, University of Ulsan, Korea
Date and time   May 17, 2011, 14:00
Location   BME, Informatics Building, IB 110

Abstract: In this work, we develop an energy-efficient routing scheme that takes into account the interference created by existing flows in the network. The routing scheme chooses a route such that the network expends the minimum energy satisfying with the minimum constraints of flows. Unlike previous works, we explicitly study the impact of routing a new flow on the energy consumption of the network. Under certain assumptions on how links are scheduled, we can show that our proposed algorithm is asymptotically (in time) optimal in terms of minimizing the average energy consumption. We also develop a distributed version of the algorithm. Our algorithm automatically detours around a congested area in the network, which helps mitigate network congestion and improve overall network performance. Using simulations, we show that the routes chosen by our algorithm (centralized and distributed) are more energy efficient than the state of the art.

Short bio: Sungoh Kwon received his B.S. and M.S. degrees in electrical engineering from KAIST, Daejeon, Korea, and the Ph.D. degree in electrical and computer engineering from Purdue University, West Lafayette, IN, in 1994, 1996, and 2007, respectively. From 1996 to 2001, he had worked as a research staff in Shinsegi Telecomm Inc., Seoul, Korea. From 2007 to 2010, he had developed schedulers for LTE as a principal engineer in Samsung Electronics Co., Ltd., Korea. He is now an Assistant Professor at the School of Electrical Engineering, the University of Ulsan, Korea. His research interests are in wireless communication networks.

A multi-class preemptive priority cognitive radio system with random interruption discipline

Speaker   Prof. Jinting Wang, Beijing Jiaotong University, China
Date and time   Jun 17, 2011, 10:00
Location   BME, Informatics Building, IB 110

Abstract: Cognitive radio system has been studied intensively. It is usually described as a multiserver queue with preemptive multiclass priority queueing system. We study the system where customers of lower priorities are preempted randomly in spite of their arriving order. In this paper, we investigate such a multiserver Markovian queueing model with K priority classes with preemptive priorities and random preemptive discipline. We derive recurrence relations for the moments of the lifetime distribution of customers of lower priorities and present a numerical method of computing the solution. Finally, the moments of the lifetime distribution are compared numerically for the random interrupted system and the ordinal system.

Short bio: Jinting Wang is a full professor in Department of Mathematics, Beijing Jiaotong University. His research interests include performance modelling computer networks and telecommunication Networks, and queueing theory and service engineering.

PeerSoN: Privacy-Preserving P2P Social Networks

Speaker   Dr. Sonja Buchegger, KTH, Sweden
Date and time   Jun 29, 2011, 10:00
Location   BME, Informatics Building, IB 110

Abstract: Current online social networks give their users little control over their own personal data, what is collected, who can access it, and what happens to the data. There can be data mining, behavior tracking, targeted advertisements, and even disclosure of personal data and relations to third parties. Users have to accept the provider's privacy policy in order to participate in the social network. To protect the users' privacy while keeping the features of social networks, we envision a paradigm shift from client-server to a peer-to-peer infrastructure coupled with encryption so that users keep control of their data. A side effect of distributing the social networking service is that it can also allow for local usage without constant Internet access. This shift to a provider-less distributed system gives rise to many research questions intersecting networking, security, distributed systems and social network analysis, leading to a better understanding of how technology can support social interactions.

Short bio: Sonja Buchegger is an associate professor at the School of Computer Science and Communication (CSC) at KTH, Stockholm, Sweden, in the Theoretical Computer Science group (TCS). Prior to joining KTH, Sonja was a senior research scientist at Deutsche Telekom Laboratories, Berlin, Germany, and a post-doctoral scholar at the University of California at Berkeley, School of Information. Her Ph.D. is in Communication Systems from EPFL, Lausanne, Switzerland, and she got a graduate degree in Computer Science and undergraduate degrees in Computer Science and in Business Administration from the University of Klagenfurt, Austria. She was a research and teaching assistant at EPFL and worked at the IBM Zurich Research Laboratory in the Network Technologies Group. Her research interests are in computer networks (self-organizing, mobile ad-hoc, peer-to-peer, social, sensor, delay-tolerant/opportunistic) and questions related to economics, security, and privacy.

Decision and Game Theory for Network Security and Risk Management

Speaker   Prof. Tansu Alpcan, TU Berlin and DT Labs, Germany
Date and time   Sep 9, 2011, 11:00
Location   BME, Informatics Building, IB 110

Abstract: Network security is a challenging problem due to the complexity of underlying hardware, software, and network inter-dependencies as well as human and social factors. It involves decision making in multiple levels and multiple time scales, given the limited resources available to both malicious attackers and administrators defending networked systems. The resources vary from bandwidth, computing, and energy at the machine level to manpower and scheduling at the organizational level. This talk presents a theoretical foundation for making resource allocation decisions that balance available capabilities and perceived security risks in a principled manner. Analytical models utilizing game and optimization theories will be discussed with a specific focus on security games and their applications. The talk will conclude with a brief overview of recent analytical models for security risk management.

Short bio: Tansu Alpcan received the B.S. degree in electrical engineering from Bogazici University, Istanbul, Turkey in 1998. He received the M.S. and Ph.D. degrees in electrical and computer engineering from University of Illinois at Urbana-Champaign (UIUC) in 2001 and 2006, respectively. His research involves applications of distributed decision making, game theory, and control to various security and resource allocation problems in complex and networked systems. He has received Fulbright scholarship in 1999 and best student paper award in IEEE Conf. on Control Applications in 2003. Tansu Alpcan has received Robert T. Chien Research Award from the UIUC Department of Electrical and Computer Engineering and Ross J. Martin Research Award from the UIUC College of Engineering in 2006. He was an associate editor for IEEE Conference on Control Applications (CCA) in 2005 and has been TPC member of several conferences including IEEE Infocom 2007-2009. He was the co-chair of the workshop on Game Theory in Communication Networks (GameComm) 2008 and publicity chair of GameNets 2009. He is steering board member and was general chair of Conference on Decision and Game Theory for Security (GameSec) in 2010. He has received the best paper award in 2010 IEEE Intl. Conf. on Communications (ICC), Comm. and Inf. Sys. Security Symposium. Tansu Alpcan has been a member of IEEE since 1998. He is the (co-)author of more than 100 peer-reviewed journal and conference articles. He has worked as a senior research scientist in Deutsche Telekom Laboratories, Berlin, Germany, between 2006 and 2009. Tansu Alpcan is currently assistant professor (Juniorprofessur) in Technical University of Berlin while continuing his affiliation with Deutsche Telekom Laboratories. He will join soon the University of Melbourne (Australia) as Senior Lecturer starting from October 2011.

buttyan (at)