Literature Database Entry

groebner2007effizienzbetrachtung

Benjamin Gröbner, "Effizienzbetrachtung von Peer-to-Peer-Techniken in drahtlosen Sensornetzen," Master's Thesis, Department of Computer Science, Friedrich–Alexander University of Erlangen–Nuremberg (FAU), March 2007. (Advisors: Abdalkarim Awad and Falko Dressler)

Abstract

Without doubt peer-to-peer systems have reached a very important relevance for many different applications on the internet in the last years. But apart of there, the use of peer-to-peer techniques has not been specifically analysed so far in the importance winning field of wireless and mobile communication networks, with often explicit less available resources of computing power, memory capacity and low data transfer rates for the communication. This is however required to survey the applicability of peer-to-peer systems for potential applications even under such terms. For this purpose different structured peer-to-peer systems like Chord, Pastry or Kademlia, which are all based on distributed hash tables, were closely examined and finally a simulation model of Chord in a realistic wireless network was created. The OMNeT++ environment for discrete event simulation was used there, whereas the implementation of Chord was realised in C++ as a module for OMNeT++. Different scenarios of networks were so verified and analysed for appearing latencies, loss ratios, fairness and utilisation with regard to variable parameters. While the applicability in networks with about 50 nodes was no problem, bad scalability as a result of heavy load with obvious larger networks was discovered. This attributes not only to Chord alone, but also to load created by routing and affords altogether opportunities for potential improvements.

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