Using Ghosts For Global Topology Knowledge In Space-Parallel Distributed Network Simulations  

Oleh:

Riley, Gerald ; Jaafar, Talal M. ; Fujimoto, Richard ; Ammar, Mostafa H.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Simulation vol. 81 no. 4 (Apr. 2005), page 267-278.
Topik: Network simulation; distributed simulation; large-scale simulation
Fulltext: 267.pdf (328.05KB)

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The authors discuss an approach to federated network simulations that eases the burdens on the simulation developer in creating space-parallel simulations. Previous approaches have had difficulties that arise from the need for global topology knowledge when forwarding simulated packets between federates. In all but the simplest cases, proper packet-forwarding decisions between federates requires routing tables of size O(mn), where m is the number of nodes modeled in a particular federate, and n is the total number of network nodes in the entire topology. Furthermore, the benefits of the well-known NIx-Vector routing approach cannot be fully achieved without global knowledge of the overall topology. The authors overcome these difficulties by using a topology partitioning methodology that uses ghost nodes. They show experimentally that the memory overhead associated with ghosts is minimal relative to the overall memory footprint of the simulation.

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