Characterizing User Mobility in Second Life
In this paper, the authors present a measurement study of user mobility in Second Life. They first discuss different techniques to collect user traces and then focus on results obtained using a crawler that they built. Tempted by the question whether their methodology could provide similar results to those obtained in real-world experiments, they study the statistical distribution of user contacts and show that user mobility in Second Life presents similar traits to those of real humans. They further push their analysis to radio networks that emerge from user interaction and show that they are highly clustered. Lastly, they focus on the spatial properties of user movements and observe that users in Second Life revolve around several points of interest traveling in general short distances.