Date of Original Version

3-2003

Type

Conference Proceeding

Published In

Wireless Communications and Networking, 2003. WCNC 2003. 2003 IEEE , vol.3, no., pp.1963-1968 vol.3, 20-20 March 2003

Abstract or Table of Contents

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.

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