Community Research and Development Information Service - CORDIS


CDN-H Report Summary

Project ID: 628441
Funded under: FP7-PEOPLE
Country: Germany

Periodic Report Summary 1 - CDN-H (Improving Performance and Cost of Content Delivery in a Hyperconnected World)

As the Internet ecosystem is becoming more complex and applications more demanding, there is an increasing need to better understand this evolving ecosystem and improve content delivery performance for an increasing online global population. To this end, we develop novel and scalable techniques to assess the state and health of the Internet and to improve content delivery in a rapidly changing Internet.

We push the envelope in Internet measurement by relying on a voluminous amount of data collected from both public and private vantage points and introduce new techniques to map peering interconnections at the level of a single building [P8]. Furthermore, we report on the recent changes in the peering ecosystem that are expected to have significant implications on ISP-CDN business relationships [P3]. We develop novel techniques to infer complex peerings, many of which are heavily utilized by CDNs [P4]. We also exploit the distributed platform of a large content delivery network, composed of thousands of servers around the globe, to assess the performance characteristics of the Internet’s core [P9] and also to assess the potential of exploring alternative paths and protocols to better deliver content in the Internet. In the process, we designed a fully decentralized, open-source analytics system for network traffic data that relies on smart partitioning storage schemes to support fast join algorithms and efficient execution of filtering queries [P7].

We develop novel techniques to infer the traffic that is exchanged between different networks in the Internet without having direct access to these networks [P6]. We also report on trends in application mix and on the dominant role of Web traffic [P2]. Our analysis also unveils that a significant fraction of today's Internet is exchanged between servers [P5] that has significant implications on future Internet architectures and protocols, as well as on the optimization of content delivery in the Internet.

We investigate the cost-performance tradeoffs the different interconnection service offerings that are available to networks at Internet exchange points and other peering facilities, towards putting this debate on scientifically solid foundations [P10]. We also show how network operators can take advantage of the new developments in virtualization to enable scalable and secure application and content delivery within their network [P1] that has the potential to offer new revenue streams and enable new applications and collaborations between different Internet stakeholders.

Research Highlights:

Based on the work and support of my Marie Curie:

- I awarded the European Research Council (ERC) Starting Grant award, this is the most prestigious career award in Europe.

- I received the best paper award for C2: “Mapping Peering Interconnections to a Facility”, ACM CoNEXT 2015.


I work closely with my MIT host and since October 2015 I am a member of MIT Internet Policy Research Initiative.

I am also a visiting researcher at the Custom Analytics R&D group at Akamai. Akamai is the largest content delivery network with more than 150,000 servers around the globe.

I have established collaborations with Yale University, RIPE, and University of California San Diego/CAIDA.


- Published Papers:

The results of the projects appeared in highly selective proceedings of conferences and journals (acceptance around 20%):

[P1]. "In-Net: Enabling In-Network Processing for the Masses"
Radu Stoenescu, Matei Popovici, Vladimir Olteanu, Joao Martins, Roberto Bifulco, Felipe Huici, Mohamed Ahmed, Georgios Smaragdakis, Mark Handley, and Costin Raiciu.
In proceedings of ACM EuroSys 2015, April 2015.

[P2]. "Distilling the Internet’s Application Mix from Packet-Sampled Traffic"
Philipp Richter, Nikolaos Chatzis, Georgios Smaragdakis, Anja Feldmann, and Walter Willinger.
PAM 2015, March 2015.

[P3]. "Quo vadis Open-IX? Trying to boost public peering in the US"
Nikolaos Chatzis, Georgios Smaragdakis, Anja Feldmann, and Walter Willinger.
ACM SIGCOMM Computer Communication Review, 45(1), January 2015.

[P4]. "Peering at Peerings: On the Role of IXP Route Servers"
Philipp Richter, Georgios Smaragdakis, Anja Feldmann, Nikolaos Chatzis, Jan Boettger, and Walter Willinger.
ACM IMC 2014, November 2014.

[P5]. "Back-Office Web Traffic on The Internet"
Enric Pujol, Philipp Richter, Balakrishnan Chandrasekaran, Georgios Smaragdakis, Anja Feldmann, Bruce Maggs, and KC Ng.
ACM IMC 2014, November 2014.

[P6]. "Inter-Domain Traffic Estimation for the Outsider"
Mario Sanchez, Fabian Bustamante, Balachander Krishnamurthy, Walter Willinger, Georgios Smaragdakis, and Jeffrey Erman.
ACM IMC 2014, November 2014.

[P7]. “Datix: A System for Scalable Network Analytics”,
Dimitrios Sarlis, Nikolaos Papailiou, Ioannis Konstantinou, Georgios Smaragdakis, and Nectarios Koziris.
ACM SIGCOMM Computer Communication Review, 45(5), October 2015.

[P8]. "Mapping Peering Interconnections to a Facility"
Vasilis Giotsas, Georgios Smaragdakis, Bradley Huffaker, Matthew Luckie, and K Claffy.
ACM CoNEXT 2015.

[P9]. "A Server-to-Server View of the Internet"
Balakrishnan Chandrasekaran, Georgios Smaragdakis, Arthur Berger, Matthew Luckie, and Keung-Chi Ng.
CoNEXT 2015.

[P10]. "Express or Local Lines: On Assessing QoE over Private vs. Public Peering Links"
Walter Willinger, Anja Feldmann, Philipp Richter, Georgios Smaragdakis, and Fabian Bustamante.
NSF/FCC Workshop on Tracking Quality of Experience in the Internet, 2015.

- Invited talks:

I presented results of the project supported by my Marie Curie Fellowship in the following colloquia/workshops:

1. "Internet Exchange Points and the Internet", Yale University (March 15, 2015).

2. "Improving Performance and Cost of Content Delivery in a Hyperconnected World", The 5th Workshop on Internet Economics (WIE 2014), University of California San Diego/CAIDA (December 10, 2014).

3. "Internet Exchange Points and the Internet", Akamai Technologies (October 29, 2014).

4. "Internet Exchange Points and the Internet", Massachusetts Institute of Technology (October 6, 2014)

5. “Enabling CDN-ISP Collaboration”, Massachusetts Institute of Technology (September 25, 2014)

6. “Mapping Peering Interconnections to a Facility”, The 6th Workshop on Internet Economics (WIE 2014), University of California San Diego/CAIDA (December 17, 2015).

7. "Identifying and Measuring Points of Congestion", MIT Communications Future Program (October 27, 2015).

8. "Internet Exchange Points and the Internet", Yale University (March 16, 2015).


Jacqueline Bock, (Administrator EC Projects)
Tel.: +49 3031421371
Fax: +49 3031421689


Life Sciences
Record Number: 191444 / Last updated on: 2016-11-17