Oliver Hohlfeld

Professor, Chair of Computer Networks, Brandenburg University of Technology (BTU)

CV

I’m a Professor and head the Chair of Computer Networks at Brandenburg University of Technology (BTU). Before, I headed the Network Architectures group at the chair for Communication and Distributed Systems at RWTH Aachen University. Before I was with Anja Feldmann at TU Berlin / Deutsche Telekom Innovation Laboratories. I was a visiting scholar at the group of Paul Barford at the University of Wisconsin - Madison, USA.

I studied computer science at Darmstadt University of Applied Sciences, Institute Eurecom (Sophia Antipolis, France) and Darmstadt University of Technology and hold a Bachelor of Science (B.Sc.) and Master of Science (M.Sc.) degree. From 2004 to 2006 I was with the Fraunhofer IGD where I worked on network architectures for telemedical applications. I obtained a Ph.D. (Dr. rer. nat.) from TU Berlin in 2013 (Advisor: Anja Feldmann).

I am a Senior Member of the ACM.

Interests

  • Network Security
  • Network Measurements
  • Internet architecture / protocols
  • Quality of Experience / Psychological Studies

Education

  • Dr. rer. nat. (Ph.D.) in Computer Science, 2013

    TU Berlin (Advisor: Anja Feldmann)

  • M.Sc. in Computer Science, 2008

    TU Darmstadt

I use a data-driven approach including user studies, empirical network measurement, and machine learning
to understand and improve Internet performance and security.

News

2021-06paperNew Paper CACM Research Highlight A Year in Lockdown: How the Waves of COVID-19 Impact Internet Traffic appeared in the July 2021 edition of CACM. Technical Perspective on our Article written by Jennifer Rexford (Princeton University).
2021-06paperNew paper: A Questionnaire to Assess Virtual Conference Participation Experience (talk video) to appear at IEEE QoMEX 2021.
2021-04paperNew paper analyzing blacklists appeared at IEEE TNSM (Special Issue on Cybersecurity)
2021-03miscI’ll be happy to serve a General Chair for TMA 2021
2021-03miscPAM 2021 will be ongoing this week, join for free and enjoy a terrifc program: https://www.pam2021.b-tu.de/
2020-12miscI am named a senior member of the Association for Computing Machinery (ACM). ACM senior membership is a recognition of demonstrated excellence in the computing field and one of the society’s prestigious member grades. The honor recognizes ACM’s top 25% of professional members who have been technical and/or professional leaders in the community for more than 10 years.
2020-12talkInternet User Behavior During COVID-19 I presented our current #COVID-19 Internet research as 50 min invited talk at IEEE ICOSST. The talk covers our work on virtual conference experience, contact tracing apps, and COVID impacts on internet traffic: Video https://youtu.be/oiltqixoJRc
2020-12miscOur study on the effect of COVID-19 on Internet Traffic (IMC’20) was widely covered by the German media: Interview with me by the Lausitzer Rundschau - LR cover page,
zeit.de, sueddeutsche, stern, handelsblatt, …
Radio Report by Puls Radio @ Bayrischer Rundfunk
2020-10miscOur master student Nabil Abo Nasser is awarded with this years DAAD award for outstanding achievements of international students studying at German universities - congratulations!
2020-10serviceI’ll serve as PhD jury member of Robin Marx @ Univ Hasselt (Belgium),
TPC of IFIP Networking 2021, IEEE Netsoft 2021, IEEE Global Internet Symposium 2021
2020-09paperStudy on the effects of Cross-Signing on the Security of the Web Public Key Infrastructure Security accepted at CCS’20
2020-09serviceI’ll serve as General Chair for PAM 2021 www.pam2021.b-tu.de - send us great work!
2020-09miscKuVS newsletter August edition released - featuring 4 reports on our virtual conference / covid-19 traffic research.
2020-08paperHow did Internet traffic change during the pandemic? IMC pre-print available: arxiv.org/abs/2008.10959
2020-08paperContact-tracing apps have become a vital tool for reducing the spread of COVID-19. When Germany launched its own, millions of users downloaded it. What are the traffic characteristic / geographic spreak? Find out in this poster paper presented at SIGCOMM 2020 this week.

Awards

Projects

Principal Investigator:AIDOS: Artifical Intelligence-based DDoS Mitigation at Internet Exchange Points
2019 - 2022
Joint project with the DE-CIX Internet Exchange Point
Funded by the BMBF
Principal Investigator: DFG Collaborative Research Center SFB 1053 MAKI
MAKI – Multi-Mechanisms Adaptation for the Future Internet
2017-2020 (Entry in GPRIS project database)
The project provides funding for 1 PhD position
Principal Investigator:COMTEX: Context in Anonymous Short Texts
2018 - 2019
Joint project with linguistics and sociology on social network analysis.
Funded by the Excellence Initiative of the German federal and state governments
Principal Investigator: Internet Observatory
2018 - 2019
Funded by the Excellence Initiative of the German federal and state governments
Principal Investigator and member of the general assembly: SSICLOPS
Scalable and Secure Infrastructures for Cloud Operations
(funded by the EU under Horizon 2020, 2015-2018)
The project provides funding for 2 PhD positions

Professional Services

PhD Committees

2021-09-24Making DNSSEC Future Proof
Moritz Müller
University of Twente, Netherlands
2021-07-12Analysis of Influencing Factors in Speech Quality Assessment using Crowdsourcing
Rafael Zequeira Jiménez
TU Berlin, Germany
2021-07-02Web Quality of Experience Measurement: Metrics, Methods and Tools
Alemnew Asrese
Aalto University, Finland
2020-12-15Debugging Modern Web Protocols video
Robin Marx
Hasselt University, Belgium
2019-12-18Improving Anycast with Measurements
Wouter de Vries
University of Twente, Netherlands
2019-06-13Dissecting HTTP/2 and QUIC: Measurement
Jawad Manzoor
UC Louvain, Belgium
2019-01-18Revisiting the Interplay of Inter-Domain Traffic and Routing Policies
Thomas Krenc
TU Berlin, Germany

Technical Program Committee Member

  1. 2021: QoMEX IEEE International Conference on Quality of Multimedia Experience
  2. 2021: GI IEEE Global Internet Symposium
  3. 2021: NoF IEEE International Conference on Networks of the Future (NoF)
  4. 2021: Networking IFIP Networking
  5. 2021: NetSoft IEEE Conference on Network Softwarization
  6. 2020: PAM Passive and Active Measurement Conference
  7. 2020: CoNEXT Student Workshop PhD student workshop
  8. 2020: SIGCOMM Posters/Demos ACM SIGCOMM Posters, Demos, and Student Research Competition
  9. 2020: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
  10. 2020: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
  11. 2020: TMA Network Traffic Measurement and Analysis Conference
  12. 2020: NetSoft IEEE Conference on Network Softwarization
  13. 2020: NFV-SDN IEEE NFV-SDN
  14. 2020: QoMEX IEEE International Conference on Quality of Multimedia Experience
  15. 2020: NOMS IEEE/IFIP Network Operations and Management Symposium
  16. 2020: NoF IEEE International Conference on Networks of the Future (NoF)
  17. 2020: ITSec ITG Workshop on IT Security (ITSec)
  18. 2019: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
  19. 2019: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
  20. 2019: PAM Passive and Active Measurement Conference
  21. 2019: ICCCN IEEE International Conference on Computer Communications and Networks
  22. 2019: IMC ACM Internet Measurement Conference
  23. 2019: NFV-SDN IEEE NFV-SDN
  24. 2019: QoMEX IEEE International Conference on Quality of Multimedia Experience
  25. 2019: Internet-QoE Internet QoE Workshop
  26. 2019: QoE-Management International Workshop on Quality of Experience Management
  27. 2019: NetSys International Conference on Networked Systems
  28. 2019: SIGCOMM Posters/Demos ACM SIGCOMM Posters, Demos, and Student Research Competition
  29. 2019: NetSoft IEEE Conference on Network Softwarization
  30. 2018: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
  31. 2018: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
  32. 2018: CoNEXT Student Workshop PhD student workshop
  33. 2018: PAM Passive and Active Measurement Conference
  34. 2018: NetSoft IEEE Conference on Network Softwarization
  35. 2018: NFV-SDN IEEE NFV-SDN
  36. 2018: GI IEEE Global Internet Symposium
  37. 2018: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  38. 2018: MIPR IEEE Conference on Multimedia Information Processing and Retrieval
  39. 2018: QoE-Management International Workshop on Quality of Experience Management
  40. 2018: Internet-QoE Internet QoE Workshop
  41. 2018: MobiArch Workshop on Mobility in the Evolving Internet Architecture
  42. 2018: SecSoN ACM SIGCOMM 2018 Workshop on Security in Softwarized Networks
  43. 2018: QoMEX IEEE International Conference on Quality of Multimedia Experience
  44. 2017: CAN Cloud-Assisted Networking Workshop
  45. 2017: ITC International Teletraffic Congress
  46. 2017: Internet-QoE Internet QoE Workshop
  47. 2017: QoMEX IEEE International Conference on Quality of Multimedia Experience
  48. 2017: NFV-SDN IEEE NFV-SDN
  49. 2017: CNSM NFV-SDN
  50. 2017: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  51. 2017: DCC Workshop on Distributed Cloud Computing
  52. 2017: NetSoft IEEE Conference on Network Softwarization
  53. 2017: NetSys International Conference on Networked Systems
  54. 2016: NetSoft IEEE Conference on Network Softwarization
  55. 2016: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  56. 2016: CAN Cloud-Assisted Networking Workshop
  57. 2016: MONAMI International Conference on Mobile Networks and Management
  58. 2016: ITC International Teletraffic Congress
  59. 2016: NFV-SDN IEEE NFV-SDN
  60. 2016: PQS International Workshop on Perceptual Quality of Systems
  61. 2016: ICCE IEEE International Conference on Consumer Electronics
  62. 2016: Man SDN/NFV International Workshop on Management of SDN and NFV Systems
  63. 2015: SCRUM Strategies for Consistency, Replication, and Understandability in Middleware
  64. 2015: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  65. 2015: MONAMI International Conference on Mobile Networks and Management
  66. 2015: DCC Workshop on Distributed Cloud Computing
  67. 2015: QCMan IFIP/IEEE Workshop on QoE Centric Management
  68. 2015: Man SDN/NFV International Workshop on Management of SDN and NFV Systems
  69. 2014: MONAMI International Conference on Mobile Networks and Management
  70. 2013: STEM
  71. 2013: WNM Workshop on Internet Measurement
  72. 2010: ATNAC The Australasian Telecommunication Network Application Conference
  73. 2010: IWQoS IEEE International Workshop on Quality of Service
  1. ATNAC: 2010
  2. CAN: 2016 2017
  3. CNSM NFV-SDN: 2017
  4. CloudCom: 2015 2016 2017 2018
  5. CoNEXT: 2018 2019 2020
  6. CoNEXT Student Workshop: 2018 2020
  7. DCC: 2015 2017
  8. EPIQ: 2018 2019 2020
  9. GI: 2018 2021
  10. ICCCN: 2019
  11. ICCE: 2016
  12. IMC: 2019
  13. ITC: 2016 2017
  14. ITSec: 2020
  15. IWQoS: 2010
  16. Internet-QoE: 2017 2018 2019
  17. MIPR: 2018
  18. MONAMI: 2014 2015 2016
  19. Man SDN/NFV: 2015 2016
  20. MobiArch: 2018
  21. NFV-SDN: 2016 2017 2018 2019 2020
  22. NOMS: 2020
  23. NetSoft: 2016 2017 2018 2019 2020 2021
  24. NetSys: 2017 2019
  25. Networking: 2021
  26. NoF: 2020 2021
  27. PAM: 2018 2019 2020
  28. PQS: 2016
  29. QCMan: 2015
  30. QoE-Management: 2018 2019
  31. QoMEX: 2017 2018 2019 2020 2021
  32. SCRUM: 2015
  33. SIGCOMM Posters/Demos: 2019 2020
  34. SecSoN: 2018
  35. TMA: 2020
  36. WNM: 2013

Journal Reviews

  1. 2011, 2014, 2015, 2016, 2017, 2019 IEEE COMMAG (IEEE Communications Magazine)
  2. 2012, 2016, 2017 IEEE TNSM (IEEE Transactions on Network and Service Management)
  3. 2014, 2015, 2016 Springer Mobile Networks and Applications (journal)
  4. 2010, 2011, 2012, 2020 TON (IEEE/ACM Transactions on Networking)
  5. 2014, 2015 ACM SIGCOMM CCR (ACM SIGCOMM Computer Communication Review)
  6. 2016, 2017 ACM TOIT (ACM Transactions on Internet Technology)
  7. 2017 ACM TOMM (ACM Transactions on Multimedia Computing Communications and Applications)
  8. 2017 Springer MTAP (Spinger Multimedia Tools and Applications)
  9. 2017 Elsevier PMC (Elsevier Pervasive and Mobile Computing)
  10. 2015 IEEE TVT (IEEE Transactions on Vehicular Technology)
  11. 2014 IEEE COMPUTER ()
  12. 2020 COMNET (Elsevier Computer Networks)
  13. 2013 COMCOM (Elsevier Computer Communications)
  14. 2011 IEEE J-SAC (IEEE Journal on Selected Areas in Communications)
  15. 2010 AEÜ (International Journal of Electronics and Communications)
  16. 2010 IEEE ToB (IEEE Transactions on Broadcasting)
  17. 2010 AoT (Annals of Telecommunications)
  18. 2009 IEE TMM (IEEE Transactions on Multimedia)

Recent Invited Talks

2020-12-16Internet User Behaviour During COVID-19 video
IEEE ICOSST Invited Talk
2020-11-09The Lockdown Effect: Implications of the COVID-19 Pandemic on Internet Traffic video
Internet Architecture Board COVID-19 Network Impacts Workshop
2020-10-21Online Labor - Wir bauen gemeinsam ein Miniatur-Internet video
BTU Tag der Lehre 2020 - Gute Lehre im Online-Semester
2019-09-16DDoS Hide & Seek: On the Effectiveness of a Booter Services Takedown slides
Munich Internet Research Retreat
2019-07-08Is the Web ready for HTTP/2 Server Push?
Research colloqium talk, University of Goettingen, Germany
2019-06-13Is the Web ready for HTTP/2 Server Push?
Université catholique de Louvain, Belgium
2019-03-20Is the Web ready for HTTP/2 Server Push? video
Netsys 2019, Outstanding Paper session
2018-11-06Designing data-driven systems: measurement, analysis
Guest lecture, CSCI-2952-E, Brown University, USA
2017-11-30Understanding the Usage of New Internet Protocols in the Wild slides
Munich Internet Research Retreat Raitenhaslach
2017-08-21Quality of Experience Demystified Keynote Talk
Keynote talk ACM SIGCOMM Internet-QoE
2017-08-17How HTTP/2 pushes the web: An empirical study on utilization and QoE perspective on Server Push
International Computer Science Institute, Berkeley, USA
2016-02-29Kernel Accelerated Packet Processing
Invited talk, 1st ITN CleanSky Conference Heidelberg
2015-09-24Measuring and Optimizing the Cloud
Invited talk, ITG 5.2.1 Cloud Workshop, University of Tuebingen
2015-09-16Invited workshop: Scientific Writing
ITN CleanSky Summer School 2015, University of Goettingen
2015-08-20An Internet Census Taken by an Illegal Botnet
Invited talk, Academic Centre of Excellence for Cyber Security Research at University College London
2015-04-15Software Defined Networking & Network Functions Virtualization
invited talk 12. Sitzung des ITG-Fachausschusses 3.3 Übertragungstechnologien für elektronische Medien
2015-04-14On the origins of spam
Invited seminar talk, Project Leonardo RWTH Aachen
2014-11-14On the origins of spam
RWTH Science Night

Other

Teaching

SummerWinter
2020
2019
2018Internet Architecture and Performance
2017Internet Architecture and Performance
RWTH Aachen University: As Lecturer (Lehrbeauftragter):RWTH Aachen University:TU Berlin: As Teaching AssistentUniversity of Applied Sciences Darmstadt: As Teaching Assistent
Oliver Hohlfeld Photo

Address:
Oliver Hohlfeld
Brandenburg University of Technology
Chair of Computer Networks
Konrad-Wachsmann-Allee 5
03046 Cottbus, Germany
Map
Email: oliver dot hohlfeld at b-tu /DOT/ de
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My group
Chair of Computer Networks
Social
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ResearchGate
@ohohlfeld Twitter
Publications
DBLP
Google Scholar

Netray Internet Observatory

netray.IO
QUIC Adoption
HTTP2 Adoption
TCP Initial Window Configurations
Certificate Authority Authorization (CAA)

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