Issue No. 01 - January (2006 vol. 5)
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/TMC.2006.13
This study investigates mobility patterns in microcellular wireless networks, based on measurements from the 802.11-based system that blankets the Carnegie Mellon University campus. We characterize the distribution of dwell time, which is the length of time that a mobile device remains in a cell until the next handoff, and sign-on interarrival time, which is the length of time between successive sign-ons from the same mobile device. Many researchers have assumed that these distributions are exponential, but our results based on empirical analysis show that dwell time and sign-on interarrival time can be accurately described using heavy-tailed arithmetic distributions that have infinite mean and variance. We also show that the number of handoffs per sign-on can be modeled accurately with a heavy-tailed distribution.
Index Terms- Microcellular networks, mobility model, dwell time, call interarrival time, number of handoffs per sign-on, heavy-tailed distribution, and long-range dependence.
"Mobility Patterns in Microcellular Wireless Networks," in IEEE Transactions on Mobile Computing, vol. 5, no. , pp. 52-63, 2006.