Figure 1
From: Energy-efficient mobile tracking in heterogeneous networks using node selection
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1687-1499-2014-2/MediaObjects/13638_2013_Article_1027_Fig1_HTML.jpg)
Heterogeneous network. It contains location-known access points, peer nodes serving as anchor nodes, and one multi-RAT target mobile moving according to a certain trajectory.