Methods, apparatuses, and systems directed to a
wireless node location mechanism that uses a
signal strength weighting metric to improve the accuracy of estimating the location of a
wireless node based on signals detected among a plurality of radio transceivers. In certain implementations, the
wireless node location mechanism further incorporates a differential
signal strength metric to reduce the errors caused by variations in wireless node transmit power, errors in
signal strength detection, and / or direction-dependent
path loss. As opposed to using the absolute
signal strength or power of an RF signal transmitted by a wireless node, implementations of the present invention compare the differences between
signal strength values detected at various pairs of radio receivers to corresponding differences characterized in a model of the RF environment. One implementation of the invention searches for the locations in the model between each pair of radio receivers where their
signal strength is different by an observed amount.