CLUSTERED MOBILITY MODEL & EFFECT OF NODE CLUSTERING IN MULTI-HOP WIRELESS NETWORKS
Vikram Singh Rawat · 2004
An ad hoc network consists of wireless mobile nodes which can communicate without the aid of any existing network infrastructure. Mobility plays an important role in performance of ad-hoc networks and therefore mobility models used in simulations should represent realistic scenarios. Popular mobility models assume the initial node distribution and movement to be independently and randomly distributed over the simulation area. However in real life nodes usually tend to form clusters (concentrate in certain regions) leading to a non-homogenous node distribution. The goal of this thesis is to study the performance of static wireless multi hop networks in presence of node clustering. For this purpose a mobility model that can generate clustered scenarios has been developed and implemented in Ns-2 and termed as the Clustered Mobility (CM) model. Extensive simulations were carried out using the CM model for static scenarios. Results from Random static scenarios have been used as the reference. It has been found that the performance of a static clustered scenario can vary significantly depending on the traffic pattern. In particular a scenario with larger proportion of intra cluster traffic performs better than a scenario with larger inter cluster traffic.