Performance of Wireless Ad Hoc Networks - A Simulation Study in Realistic Environments
Stefano Marinoni - Helsinki University of Technology - [2004-05]
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  • Tesi completa: 94 pagine
  • Abstract
    Multiple wireless devices jointly create and maintain ad hoc networks without the help of centralized wired entities of any kind. Thus, their employment is favored to happen in many environments with distinct topological characteristics. A typical place of employment is in Urban Areas.

    Since the ad hoc technology is not yet massively spread, research in this area is mostly simulation based. It takes place by modeling a variety of features of the particular framework under study. The motion of the mobile terminals along with the topological characteristics of the terrain in which a network operates, are key factors in the performance of the protocol being investigated. Diversified mobility conditions and different propagation prediction methods, vary the network connectivity graph distinctively throughout the time. Hence, they both impact protocol performance.

    This thesis proposes and implements a new, complete, and realistic Urban Mobility Model. The aim is to study its effect on routing performance in comparison with the more common RWP mobility fashion. The research is performed through the use of DSR as routing protocol.

    The results prove that in a realistic scenario with roads and buildings,
    the topological features of the environment dominate the routing protocol performance. Particularly, while the presence of streets itself slightly eases the protocol's duty, the placement of buildings drastically
    makes it harder.
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