Application of the RESTART/Splitting technique to network resilience studies in NS2

  • Authors:
  • Anders Mykkeltveit;Bjarne E. Helvik

  • Affiliations:
  • Norwegian University of Science and Technology, Trondheim, Norway;Norwegian University of Science and Technology, Trondheim, Norway

  • Venue:
  • MS '08 Proceedings of the 19th IASTED International Conference on Modelling and Simulation
  • Year:
  • 2008

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Abstract

Obtaining the resilience characteristics, like availability and duration of outages, of the services provided by a communication network by simulation is a challenging task. The failure to provide a service with a satisfactory Quality of Service (QoS) level between two nodes in the network is a rare event and invites the use of special simulation techniques. Since the QoS is determined by the routes used and the traffic pattern, this must be accounted for. This requires a simulator far more comprehensive than those used for rare event simulations until now. The approach investigated in this paper was to apply the RESTART/Splitting technique to the well-known open source simulator Network Simulator 2 (NS2), which is capable of dealing with the required network operation and management issues. A first version simulator focusing in the application of RESTART/Splitting rather than the inclusion of all networking aspects was developed and compared with direct simulation of a realistic network. The approach proved to be feasible with a promising gain.