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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)
—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)
One of the most important design goals of current Peer-to-Peer (p2p) technology is to be able to offer its service to an arbitrary large number of users. Discrete event simulation is often applied to quantitatively and qualitatively evaluate the performance and scalability of such systems before they are deployed. However, the number of users, processes and(More)
Recent research efforts have shown that peer-to-peer (p2p) mechanisms incorporate a potential that goes well beyond simple file sharing. Compared to the classic client-server architecture, these systems do not suffer from a single point of failure. However, there is still the danger that an adversary is able to attack a specific subpart of the system. This(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)