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Understanding mobility characteristics is important for the design and analysis of routing schemes for Mobile Ad hoc NETworks (MANETs). This is especially true for mobile opportunistic networks where node mobility is utilized to achieve message delivery. In this paper, the authors study the properties of common mobility models. Specifically, they study inter-contact times of mobile nodes in Random Waypoint and Random Direction mobility models under opportunistic network settings. The authors also introduce a modified Random Waypoint model with hot-spots to study its mobility properties.
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