1The Impacts of Physical Layer Parameters on the Connectivity of Ad-Hoc Networks

Abstract We study the effects of physical layer parameters on the connectivity of fading wireless ad-hoc networks. Relying on a symbol error rate connectivity metric for wireless ad-hoc networks, we assume a pair of nodes are connected if their bi-directional measure of connectivity satises a given threshold. We investigate the effects of three parameters on the connectivity phe-nomenon. First and assuming the nodes are distributed over a xed nite area, we study the effects of the changes in nodes den-sity on connectivity. Next, we measure the connectivity effects of the interference coefcients, i.e., the portion of power an interfer-ing node contributes to other links. Finally, we experiment with threshold of link quality for connectedness. For each parameter, we also provide an intuitive explanation of the phenomena occur-ring in our experiments. Our simulation results show that (1) depending on the value of interference coefcient, an increase in node density may increase or decrease, and (2) increasing the in-terference coefcients and thresholds of link quality will decrease the connectivity of fading ad-hoc networks