Gerald Kunzmann

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Peer-to-peer (P2P) networks can reduce the distribution cost of large media files for the original provider of the data significantly. Thereby, the BitTorrent protocol is widely used in the Internet today. Most research work studies the protocol analytically, by simulations at the flow-level or real world experiments. Thereby, for flow-level simulations the(More)
Gnutella is a classical Peer-to-Peer network designed for file-sharing. The absence of pure servers is one of its main properties, given that every Gnutella host is client and host in one. It uses the resources of the participants to distribute content, e.g. mp3 compressed audio files, and shares the processing capacity to provide the routing and searching(More)
Video streaming is considered one of the most important and challenging application for next generation cellular networks. Current infrastructures are not prepared to deal with the increasing amount of video traffic. The current Internet, and in particular the mobile Internet, was not designed with video requirements in mind and, as a consequence, its(More)
The ongoing process of globalization leads to a huge demand for highly scalable applications that are able to deal with millions of participants distributed all over the world. Peer-to-peer (P2P) technology enables an arbitrary large number of users to participate in distributed services like content distribution or collaboration tools. In order to verify a(More)
Content-centric networks promise to address content networking issues in a better way than today’s host-based networking architecture. But content-centric networking does not inherently address the issue of services, particularly service scalability and mobility. We present our work on CCNxServ, a system that allows for dynamic service deployment and(More)
The delivery of mobile services is traditionally limited to the cellular operator's home domain, except for a small set of standardized services. Due to the centralized nature of service platforms, resource demanding services suffer from long delays if a user is accessing them when roaming. In this paper we describe an architecture that supports a dynamic,(More)
Abstract – Peer-to-Peer (P2P) networks and their applications gain increasing importance in today’s Internet, as already today the majority of IP traffic is caused by P2P applications. Since the upcoming of Napster a lot of research has been done in this area producing interesting and promising results. Still, growing demands like less data rate(More)
Peer-to-peer (p2p) systems are a highly decentralized, fault tolerant, and cost effective alternative to the classic client-server architecture. Yet companies hesitate to use p2p algorithms to build new applications. Due to the decentralized nature of such a p2p system the carrier does not know anything about the current size, performance, and stability of(More)
Many researchers working on concepts for the next generation internet agree that the split of identifier and locator seems to be a very promising approach. Although this solution addresses the most critical issues in today's internet, new challenges arise through the mapping between locator and identifier. Our proposal takes a look at novel DHT-based(More)