Author: irenatr (page 2 of 2)

4th SDN Workshop in Bern

Yesterday for the 4th time the ICCLab organized the SDN workshop at the University of Bern in cooperation with SWITCH. We had around 25 participants and 7 talks that tackled SDN in the world of cloud computing, NFV, IXP, video content delivery, high performance cloud, authentication request routing and access control etc. All these solutions coming from different projects from the academia and the industry.


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Software Defined Networking for Clouds


Software Defined Networking (SDN) is a technology that has introduced an important paradigm shift in the networking world. With the OpenFlow protocol as a main technological enabler, the essential goal is to extend the conventional network configuration approach by introducing the concept of network control and programmability.

The advances in the OpenFlow protocol and the strong community involved in the OpenDaylight (ODL) framework has significantly leveraged SDN over the past few years, which booked it a ticket as a de-facto technology in the datacenter network management journey. To follow this initiative, OpenStack has been a pioneer technology that urged to provide a direct SDN support for Neutron. Such approach has introduced new challenges arising from the direct mapping of network traffic between the physical hosts and the virtual tenant networks.

Identifying scenarios that embrace different issues to consider, has a high priority in the current SDN world. With the main focus on SDN-managed datacenter networks, this initiative will provide a technical implementation and know-how on managing cloud-based network resources in a straightforward manner.


The “SDN for clouds at the ICCLab” mission involves: establishing use cases, revealing potential issues, analyzing alternative approaches and optimizations in order to achieve efficient networking for classical datacenters, network carriers, Internet Service Providers and Cloud providers. The tasks to achieve this include:

  • Provide on-demand, scalable, commodity deployment to facilitate SDN knowledge transfer to academia and business partners
  • Provide Network as a Service for the tenants
  • Monitor and optimize intra-cloud-traffic
  • Automate changing flows with the SDN-controller
  • Minimize complexity of the network logic
  • Efficient handling of QoS and QoE network parameters
  • Independent network-hardware vendors

Research Challenges

The on-going technology and protocols applied to cloud networking are not optimal in terms of resource usage, reliability, deployment and maintenance. For example, the current implementation of Open Stack Neutron relies on different tunnelling mechanisms in order to provide isolation and multi-tenancy support. From a network application developer point of view, this is inefficient since it injects additional overhead and impedes a transparent application development.

To address the issues in that context, we define the following research tasks:

  • Reconsider the current concepts and state of the art proposals and determine a sophisticated solution towards optimized SDN design for modern cloud architectures
  • Define competitive use cases as direct controllers and evaluators of our SDN solution
  • Provide a high level framework for management of cloud based network resources in a uniform manner

Relevance to current and future markets

Having in-house deployment implies an up and running environment prepared to leverage ideas deployed and tested over commodity-hardware. The ICCLab SDN testbed will essentially facilitate the validation of use cases towards comprehensive solutions. The high-level framework on top of the ODL controller will provide smart virtual datacenter management in OpenStack deployments, and potentially target industry partners among the content delivery network companies, like Akamai for example, IPTV and streaming service providers. We also aim to expand the cooperation by exchanging technical expertise with industry partners involved in the SDN-Cloud field.


Articles and Info

Contact Point

Irena Trajkovska –



COST IC0906 WiNeMO – 24-25 September, Ohrid, Macedonia

COST (European Cooperation in Science and Technology) is one of the longest-running European frameworks. The leading objective of this project is to support European research and innovation by encouraging scientific developments and integration of research communities.

On the 24th and 25th of September, the members of this project held one of the regular annual’s meetings in the beautiful city of Ohrid, Macedonia. More info can be found here.uist-winemo-image

The meeting was opened by proposing and voting for the next meeting’s date and venue. London will host the upcoming event and the proposed dates are: 21.04.2014 and 28.04.2014.

Next, a book in preparation was announced. WiNeMO Springer Book CFP has been extended to increase the quality and address the missing subjects. This offers an opportunity to the members of the ICCLab to contribute to the chapters: “Testbed, prototypes and measurements” or “Economical – business aspects“. Potential contributors should email to Ivan Ganchev (, Marilia Curado ( or Andreas Kassler (

Dates of interest:

Abstract submission: 15th Oct 2013

Full chapter submission: 31 Dec 2013

Full chapter notification: 15th Feb 2014

The Horizon 2020 was discussed. It is the new EU project initiative after the FP7 expires by the end of this year. Some of the relevant topics in focus of this initiative include: smart & inclusive growth, sustainable growth, natural resources, security and citizenship etc. It will have a six years duration (2014-2020) and will count with 80 billion Euros.

Several interesting talks were presented form the area of Wireless Networking for Moving Objects (WiNeMO). On behalf of Thomas M. Bohnert and the ICCLab, Irena Trajkovska gave a talk entitled “P2P Multicast in KIARA with OpenFlow based QoS“, which raised the attention for interesting questions and comments.

Irena Trajkovska

trajIrena joined the ICCLab in February 2015 as a researcher. She is working on the Software Defined Networking initiative with a particular focus on architectures and use-case solutions for cloud-based datacenters. As a visiting student at the lab in 2013 Irena was working on SDN QoS applications inside the FI-PPP project KIARA. Currently she is involved in the EU projects T-Nova, Sesame and FIWARE as part of the FI-PPP program developing SDN tools and libraries that facilitate the creation of value-added networking applications such as: optimized tenant isolation in datacenter networks, resilience (on-demand configuration of physical OpenFlow switches), Service Function Chaining, etc.

Irena received her bachelor’s degree in Computer Engineering, Informatics and Automatic Control at the Faculty of Electrical Engineering and Information Technologies in­ Skopje, Macedonia. She did her Master Thesis in Networks Engineering and Telematic Services at the ETSI de Telecomunicación faculty at the Universidad Politécnica de Madrid where she is currently enrolled in a PhD research program. Her PhD research involves evaluation of architectures and protocols for multimedia streaming based on hybrid — cloud computing and P2P solutions; economic aspect and incentives of P2P-cloud streaming services and QoS adaptive streaming solutions using software defined networking.

Contact: traj /at/

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