Modeling and simulating the impact of physical propagation environment on ad hoc network routing protocols

Authors:
Nuraj Pradhan;Tarek Saadawi
Affiliations:
Dept. of Electrical Engineering, City University of New York;Dept. of Electrical Engineering, City University of New York
Venue:
CIMMACS'08 Proceedings of the 7th WSEAS international conference on Computational intelligence, man-machine systems and cybernetics
Year:
2008

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Abstract

In this paper, we will address the issues of modeling and simulating wireless ad hoc network and illustrate the impact of physical propagation model on ad hoc network routing protocol. The dynamic wireless channel is modeled with log-distance path loss model and log-normal shadow model. Further we will implement Rayleigh fading model to represent fading due to Doppler's effect caused by relative movement between the nodes. We will show that the performance of typical routing protocol such as OLSR significantly depends on the wireless channel through simulation in two different environments: open_environment characterized by open area and city_environment characterized by urban environment. The simulation results will show that the network degrades and the average delay and the routing packet overhead significantly increases in a higher attenuating environment such as the city_environment.