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    • Modeling and Analysis of Networks vIA Computer Simulations (MANIACS)
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    Stateless Routing in Network Simulations

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    MANIACS_35.pdf (644.5Kb)
    Date
    2000
    Author
    Riley, George F.
    Ammar, Mostafa H. (Mostafa Hamed)
    Fujimoto, Richard M.
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    Abstract
    The memory resources required by network simulations can grow quadratically with size of the simulated network. In simulations that use routing tables at each node to perform per-hop packet forwarding, the storage required for the routing tables is O(N2), where N is the number of simulated network nodes in the topology. Additionally, the CPU time required in the simulation environment to compute and populate these routing tables can be excessive and can dominate the overall simulation tame. We propose a new routing technique, known as Neighbor-Index Vectors, or NIx-Vectors, which eliminates both the storage required for the routing tables and the CPU time required to compute them. We show experimental results using NIx- Vector routing in the popular network simulator ns. With our technique, we achieve a near order of magnitude increase in the maximum size of a simulated network running ns on a single workstation. Further, we demonstate an increase of two orders of magnitude in topology size (networks as large as 250,000 nodes) by using this technique and running the simulation in parallel on a network of workstations.
    URI
    http://hdl.handle.net/1853/13167
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    • MANIACS Publications [35]

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