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Auflistung nach Autor:in "Niedermayer, Heiko"

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  • Konferenzbeitrag
    On the distribution of nodes in distributed hash tables
    (Kommunikation in Verteilten Systemen (KiVS), 2005) Niedermayer, Heiko; Rieche, Simon; Wehrle, Klaus; Carle, Georg
    We develop a model for the distribution of nodes in ring-based DHTs like Chord that position nodes randomly or based on hash-functions. As benefit of our model we get the distribution of interval sizes and an approximation of the distribution of data load among the participating peers. The results match previously published experimental studies on load distribution that motivated the research on load balancing. Most importantly, our model also gives a theoretical explanation for observed load behavior.
  • Konferenzbeitrag
    On the use of structured P2P indexing mechanisms in mobile ad-hoc scenarios
    (Informatik 2004, Informatik verbindet, Band 2, Beiträge der 34. Jahrestagung der Gesellschaft für Informatik e.V. (GI), 2004) Heer, Tobias; Niedermayer, Heiko; Petrak, Leo; Rieche, Simon; Wehrle, Klaus
    Recently, Distributed Hash Tables evolved to a preferred approach for decentralized data management in widely distributed systems. Due to their crucial characteristics – namely scalability, flexibility, and resilience – they are quite interesting for being applied in ad-hoc networks. But, there are plenty of open questions concerning the applicability of Distributed Hash Tables in mobile ad-hoc scenarios: Do new problems arise when both technologies are used together? – Are there any synergy effects when both technologies are combined? – Are the results and assumptions, made for the infrastructural Internet, still true if a mobile ad-hoc network is used instead? – In this paper, we discuss these and further questions and offer some solutions for using Distributed Hash Tables in ad-hoc networks.