A wireless local area network infrastructure, consisting of a couple of tens of access
points exists in each office building, university or even block of flats. These can
be used for indoor localization purposes without interfering with network activities.
In this paper a correlation based method for indoor localization is presented. No
specific infrastructure is needed except for the existing wireless access points.
Our purpose is to achieve room level accuracy localization of a mobile agent inside
a building. For portability reasons the method was implemented in Java and tested
on Linux and Android operating system environment. The results, so far, are encouraging
but more measurement and long term usage of the method are required in order to consider
the concept, at least heuristically, proven.