A group mobility model for ad hoc wireless networks

Abstract

In this paper, we present a survey of various mobility models in both cellular networks and multi-hop networks. We show that group motion occurs frequently in ad hoc net-works, and introduce a novel group mobility model- Refer-ence Point Group Mobility (RPGM)- to represent the rela-tionship among mobile hosts. RPGM can be readily applied to many existing applications. Moreover; by proper choice of parameters, RPMG can be used to model several mobil-ity models which were previously proposed. One of the main themes of this paper is to investigate the impact of the mo-bility model on the performance of a specijc network proto-col or application. To this end, we have applied our RPGM model to two different network protocol scenarios, cluster-ing and routing, and have evaluated network pedormance under dtzerent mobility patterns and for different protocol implementations. As expected, the results indicate that dtf-ferent mobility patterns affect the various protocols in dtf-ferent ways. In particular; the ranking of routing algorithms is influenced by the choice of mobility pattern. 1