Time-variant Community Mobility Model
The Time-Variant Community Mobiliy Model is a model we create to capture two important mobility characteristics we observed earlier from WLAN traces. These t
wo mobility characteristics are skewed location visiting preferences and periodical re-appearance . Our first model, the community model [2]
, incorporates the skewed location visiting preferences . The latest model, time-variant community model [1], incorporates both mobility characterist
ics.
While improving the realism of the mobility model, we also keep mathematical tractability as a requirement for the mobility model. We use random-direction mo
bility model as the basic building block, modify it to incorporate fore-mentioned mobility chracteristics. We are able to derive two quantities of interest r
elated to mobility-assisted routing, the hitting time and the meeting time. We intereted in deriving other quantities in the future.
We make the code for our time-variant community model available here. The code has many parameters and provides full flexibility to match with various mobili
ty scenarios (for full details, refer to the manual below). It simulates the hitting time, the meeting time, and prints the movement traces in two option for
mats: (1) NS-2 compatible format, or (2) time, location (in x,y coordinates) format.
Beta-Release of the source code: HERE (latest release on May 1, 2007)
User manual for the code HERE (latest release on May 31, 2007)
Related publications:
[1] Wei-jen Hsu, Thrasyvoulos Spyropoulos, Konstantinos Psounis, and Ahmed Helmy, "Modeling Time-variant User Mobility in Wireless Mobile Networks," INFOCOM 2007, May 2007.
[2] Thrasyvoulos Spyropoulos and Konstantinos Psounis, "Performance Analysis of Mobility-assisted Routing," In Proceedings of ACM MOBIHOC, May 2006.
Acknowledgement:
This work is supported by the National Science Foundation under Grants No. 07246
58, 0435505, 0134650, and CNS-0520017