A Proposal and Evaluation of Mobility Model Which Derives Various Node Mobility Scenarios
Hiroyuki Toyota, Shinji Inoue, Yoshiaki Kakuda · 2018
For performance evaluations of routings for MANETs, network simulation experiments are usually performed. A mobility model defines characteristics on node mobility in simulation experiments. In many cases, the Random Waypoint (RWP) model is adopted. In scenarios derived from the RWP model, nodes tend to be spread the simulation field with almost equally density whole in simulation experiments. Therefor it is very difficult to derive scenarios such as in case of disasters where nodes are spatially biased. This paper proposes a new mobility model that derives the above scenarios according to given parameters. The proposed mobility model needs three kinds of parameters. The first parameter is the number of nodes for each area divided in the simulation field at the beginning of a simulation experiment. The second parameter is the number of nodes for each area divided in the simulation field at the end of the simulation experiment. The third parameter is the change ratio of density through the whole simulation experiment. Here, the change ratio of density represents a degree of biased node activity for each area. By introducing a metric of similarity on node mobility, this paper also shows that nodes are spatially biased in scenarios derived from the proposed mobility model.