I. Introduction
The NATURE of mobile ad hoc networks makes simulation modeling an invaluable tool for understanding the operation of these networks. Wireless channels experience high variability in channel quality due to a variety of phenomenon, including multipath propagation, fading, atmospheric effects, and obstacles. While real-world tests are crucial for understanding the performance of mobile network protocols, simulation provides an environment with specific advantages over real-world studies. These advantages include repeatable scenarios, isolation of parameters, and exploration of a variety of metrics. Due to these benefits, simulation has become a popular tool for the development and study of ad hoc networking protocols. The vast majority of networking protocols proposed for ad hoc networks have been evaluated with some simulation tool.