The advances in wireless communication have enabled the spread of the mobile
computing paradigm, in which resource positioning plays a key role. Positioning
is the process of determining the position of a resource in a given
environment. This survey describes the main positioning techniques and the
methods used to address the positioning problem, as well as determining their
overall performance in outdoor scenarios based on a proposed set of metrics.
Through a set of comparison tables on the performance of the positioning
methods, this paper helps designers of mobile applications to choose suitable
techniques to support the services these systems provide.