Abstract: Abstract Mobility model decides how the nodes move and describe mobility manners of nodes. Hence it has been widely used in research on wireless network. This paper firstly introduced, classifies, and compares the current familiar mo-bility models. Secondly,it was discussed that current research focus on new mobility models,analysis of nodes mobility features, trace strategy, and evaluation of mobility model. Next, it was covered the existing problems of mobility models. Finally, this paper involved what calls for further study.

Key words: Mobility model, System simulation, Ad hoc network, Cellular network, Wireless sensor network