ETD system

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Tesi etd-11192008-105740


Thesis type
Tesi di laurea specialistica
Author
PECCHIA, EMILIANO
URN
etd-11192008-105740
Title
Simulation and Analysis of a Combined Mobility Model with Obstacles
Struttura
INGEGNERIA
Corso di studi
INGEGNERIA DELLE TELECOMUNICAZIONI
Supervisors
Relatore Prof. Pagano, Michele
Relatore Prof. Popescu, Adrian
Relatore Erman, David
Relatore Prof. Giordano, Stefano
Parole chiave
  • wireless network
  • ns2
  • mobility models
  • simulation
Data inizio appello
19/12/2008;
Consultabilità
Completa
Riassunto analitico
The use of simulations has become increasingly frequent in the study and the performance evaluation of network systems. The simulation environment deeply influences the behaviour of results, so a model that simulates a realistic movement of the nodes is necessary for the study of wireless networks. Simple mobility models do not provide realistic scenarios. Often movements are completely random, uncorrelated and in open space, without the chance of considering the effects of obstacles or rules that limit and guide the movement.
In this thesis, we propose a more realistic mobility model, studied for indoor environments (but applicable to outdoor models as well). Given the map of the obstacles in the simulation area (e.g. a floor plan), the nodes have the possibility to move in random walk just avoiding to cross the obstacles (e.g. walls), or following a specified virtual path that connects all the simulation area, or a hybrid of the two. Our tool creates a file containing the movement of the nodes during the whole simulation time. Simulation results show that nodes are highly dependent on the different obstacles maps and pathways. Furthermore, a mathematical demonstration is given to validate the results obtained by simulation in a simple case.