Andreas Köpsel

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The demonstration will show the live access to the control framework of a pan-European OpenFlow testbed. The testbed spans ve islands all over Europe, allowing experimenters access not only to virtual machines but to the switches interconnecting them. This extends the control of networking experiments beyond best-e ort overlays to a real control of the(More)
1389-1286/$ see front matter 2014 Elsevier B.V. All rights reserved. ⇑ Corresponding author. Tel.: +34 93 553 25 10. E-mail addresses: (M. Suñé), (L. Bergesio), (H. Woesner), tom.rothe@e Rothe), (A. Köpsel),(More)
The challenge to provide seamless mobility in the near future emerges as a key topic in various standardization bodies. This includes first of all the support of seamless handover between homogeneous networks. Distinct technologies — such as IEEE 802.11WLANs (Wi-Fi) and IEEE 802.16 MANs (WiMAX)—have recently augmented such support to existing standards to(More)
The emerging applications for 3G and 4G wireless systems typically require highly heterogeneous and time-varying quality of service from the underlying protocol layers. The wireless links, however, provide only an unreliable communication channel that suffers from temporal outages. As a consequence, protocol mechanisms are needed that, based on the(More)
Future generations of mobile operator networks, based on an all-IP-based flat architecture and a multitude of different access technologies, require a proper IP-based mobility management in place. In this article, a scalable and completely distributed mobility management is presented which is based on a Distributed Hash Table data structure. The Distributed(More)
This demonstration shows how Network Function Virtualisation (NFV) [1] can be used by a network provider to dynamically provide required mobile core network functions in case of a large ”Mega” event like a soccer game or a music festival. Economical reasons may not justify the installation or continuous maintenance of expensive dedicated hardware which is(More)
This report defines a carrier-grade split architecture based on requirements identified during the SPARC project. It presents the SplitArchitecture proposal, the SPARC concept for Software Defined Networking (SDN) introduced for large-scale wide area networks such as access/aggregation networks, and evaluates technical issues against architectural(More)
We present the design and prototyping of an OpenFlow-enabled Gigabit Ethernet switch based on an ATCA industrial standard platform. Our work consists of an architectural design for introducing OpenFlow switch functionalities to the ATCA switching platform, design and development of an enhanced library for OpenFlow protocol stack, and porting the data-path(More)
Network Functions Virtualization (NFV) is a concept that aims at providing network operators with benefits in terms of cost, flexibility, and vendor independence by utilizing virtualization techniques to run network functions as software on commercial off-the-shelf (COTS) hardware. In contrast, prior solutions rely on specialized hardware for each function.(More)