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The G-Lab project aims to investigate concepts and technologies for future networks in a practical manner. Thus G-Lab consists of two major fields of activities: research studies of future network components and the design and setup of experimental facilities. Both is controlled by the same community to ensure, that the experimental facility fits to the demand of researchers. Researchers gain access...
We present a self-organizing super-peer overlay that suits the communication requirements of a Peer-to-Peer Desktop Grid system well. This overlay combines favorable properties of Chord rings and fully meshed super-peer networks, yielding benefits that include an efficient broadcast scheme and a reduced average message hop count compared to pure Chord. To this end, we introduce a distributed algorithm...
The German Lab (G-Lab) project aims to investigate architectural concepts and technologies for a new inter-networking architecture as an integrated approach between theoretic and experimental studies. Thus G-Lab consists of two major fields of activities: research studies of future network components and the design and setup of experimental facilities. Both are controlled by the same community to...
Today's Internet has a static architecture that makes introducing new functionality a complex and costly task, so the Internet can not keep pace with rising demands and new network capabilities. Therefore, evolvability and flexibility are the keys to a future Internet architecture. In this paper we propose a building block interaction model that can be used to build highly flexible and evolvable network...
Chord has proved to be a robust and efficient self-organizing structured Peer-to-Peer overlay. In this paper, we show that with the addition of super-peers, bidirectional communications, and two novel routing improvements, Chord can safely operate in environments with firewall-protected peers at a considerably reduced end-to-end message delay. Our concept, ChordNet, is suitable for high-traffic applications...
In the last years a lot of holistic research efforts investigate concepts and technologies for future networks. All of these research projects need ways to evaluate their ideas and results. Experimental facilities aim to provide a realistic environment for experiments using emulation techniques.
Ring topologies are peer to peer network structures that organize the nodes in a ring. Each node knows its direct neighbors and a few other nodes but has no global view of the network. In such a network it is complicated to measure or estimate the number of participating nodes. We provide a lightweight, distributed algorithm to estimate the size of the node population. We also show how correct the...
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