%T A Case Study of Four Location Traces
%A Guanling Chen
%A David Kotz
%R Technical Report TR2004-490
%I Dartmouth College, Computer Science
%C Hanover, NH
%D February 2004
%U http://www.cs.dartmouth.edu/reports/TR2004-490.pdf
%X
 Location is one of the most important context information that an
 ubiquitous-computing application may leverage.  Thus understanding the
 location systems and how location-aware applications interact with
 them is critical for design and deployment of both the location
 systems and location-aware applications.  In this paper, we analyze a
 set of traces collected from two small-scale one-building location
 system and two large-scale campus-wide location systems.  Our goal is
 to study characteristics of these location systems ant how these
 factors should be taken into account by a potentially large number of
 location-aware applications with different needs.  We make empirical
 measurements of several important metrics and compare the results
 across these location systems.  We discuss the implication of these
 results on location-aware applications and their supporting software
 infrastructure, and how location systems could be improved to better
 serve applications' needs.  In places where possible, we use
 location-aware applications discussed in existing literatures as
 illustrating examples.