COST Ic 0804 final meeting, Vienna, 2013, http://www.irit.fr/~Georges.Da-Costa/ee-lsds2013/

1. Energy Efficiency in
Large Scale Distributed Systems
Collaborations with University of Coimbra
and Budapest University of Technology
and Economics
Torsten Braun, Universität Bern, Switzerland
braun@iam.unibe.ch, cds.unibe.ch

2. STSM U Bern → U Coimbra
> ECOST reference: COST-STSM-IC0804-8283
> Researcher: Thomas Staub, U Bern
> Visited Institute: U Coimbra
> Dates: June 24-30, 2011
> Topic: Energy Measurements of Wireless Network Devices
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 2

3. STSM Motivation and Results
> Motivation
— U Bern with strong experience in energy consumption measurement
and estimation techniques
— U Coimbra with strong experience in heterogeneous network
technologies (WiFi, WiMAX) as well as test-beds.
> Results
— Development of an Energy Consumption Measurement
Methodology for WiFi and WiMAX end system equipment
— Measurements in WiFi and WiMax test-beds, e.g., for
– calibration of simulation models and
– development of energy-saving mechanisms
— Publication at IEEE NCCA 2011
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 3

4. IEEE NCCA 2011
V. Bernardo, M. Curado, Th. Staub, T. Braun: Towards Energy Consumption Measurement
in a Cloud Computing Wireless Testbed, 1st IEEE International Symposium on Network Cloud
Computing and Applications, November 21-23, 2011, Toulouse
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 4

5. IEEE ICC WorkShop NovaEnEv 2012
V. Bernardo, M. Curado: A Methodology for Assessing
Video Transmission Energy Consumption and Quality,
International Workshop on Novel approaches to Energy
Measurement and Evaluation in Wireless Networks,
co-located with ICC 2012, June 10, 2012, Ottawa
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 5

6. ICCE 2012
D. Hock, V. Bernardo, Th. Zinner, F. Wamser, K. Hummel, M. Curado, R. Pries, T. Braun,
P. Tran-Gia: Evaluating the Trade-off Between Energy Efficiency and QoE in Wireless
Mesh Networks, 4th International Conference on Communications and Electronics (ICCE'12),
Special Session on Energy-Efficient Networking, August 1-3, 2012, Royal city of Hue, Vietnam
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 6

7. EE-LSDS 2013
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
V. Bernardo, M. Curado, T. Braun: Enhancing IEEE 802.11
Energy Efficiency for Continuous Media Applications,
Energy Efficiency in Large Scale Distributed Systems,
April 22-24, 2013, Vienna
EE-LSDS, Vienna, April 22, 2013 7

8. Other Issues about Collaboration with
U Coimbra
> Additional visits of Vitor Bernardo (U Coimbra) at U Bern
— February 21 – March 4, 2011
— February 13 – March 30, 2012
— August 24 – September 14, 2013
> Sabbatical of Prof. Marilia Curado (U Coimbra) at Bern and M.Sc.
lecture on Network Performance and Modelling, Spring Semester 2013
> Co-supervision of Vitor Bernardo’s thesis by Proff. Curado and Braun,
expected defence in 2014
> Vitor Bernardo attended training school in Palma de Mallorca in 2012
> Collaboration with COST Action IC 0906
Wireless Networking for Moving Objects
> 20th International Workshop on Quality-of-Service (IWQoS), 2012
— General Co-Chairs: F. Boavida and M. Curado (U Coimbra),
— Program Co-Chairs: T. Braun (U Bern) and E. Monteiro (U Coimbra)
> Common EU FP7 Integrated Project mobile-cloud-networking.eu
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 8

9. EU FP7 Integrated Project:
mobile-cloud-networking.eu
> Integration of
— Radio Access Network
— Mobile Core Network
— Data Centre (computing, storage, applications)
into (decentralized) cloud computing infrastructure (management!)
> Advantages: elasticity, costs, performance, e.g., by
exploitation of user location for service provisioning → Follow Me Cloud
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 9

10. STSM BME → U Bern
> ECOST reference: COST-STSM-IC0804-11268
> Researcher: Prof. Tuan Anh Trinh,
Budapest University of Technology and Economics (BME)
> Visited Institute: U Bern
> Dates: August 11 – September 30, 2012
> Topic: Energy Efficiency in Information-Centric Networking
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 10

11. Information-Centric Networking
EE-LSDS, Vienna, April 22, 2013
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
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12. STSM Motivation and Results
> Motivation
— U Bern with strong experience in Information-Centric Networking
(ICN)
— BME with strong experience in energy efficiency of large scale
distributed systems, energy efficient data center design,
sustainability issues of the Future Internet, etc.
> Results and Activities
— Theoretical analysis of ICN energy saving potential given that ICN
can save network transmissions by caching
— Identification of open research issues
— Publication at EE-LSDS 2013
T. Braun, T. Anh Trinh: Energy Efficiency Issues in Information-
Centric Networking, Energy Efficiency in Large Scale Distributed
Systems, Work in Progress Session, April 22-14, 2013, Vienna
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 12

13. Other Issues about Collaboration with BME
> Talks and Visits by Tuan Anh Trinh
— Université de Neuchâtel (Peter Kropf)
— Talk on Recent Advances in EE of Large-scale Networked
Systems at ETH Zürich (Karin Hummel)
> Planned Sabbatical and M.Sc. Lecture by Tuan Anh Trinh at
U Bern in Autumn Semester 2013
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 13

14. Conclusions and Outlook
> STSMs have been stimulating research collaboration
between U Bern and U Coimbra as well as BME, e.g.,
— Joint Ph.D. student supervision
— Joint publications
— Exchange of researchers, e.g., sabbaticals, and teachers
— EU collaboration projects
> COST funding has only covered a small part of collaboration
costs.
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 14

15. Thanks for your Attention
> More information
— cds.unibe.ch
— slideshare.net/torstenbraun
— braun@iam.unibe.ch
Torsten Braun: Collaborations with University of Coimbra and Budapest University of Technology and Economics
EE-LSDS, Vienna, April 22, 2013 15