Design and Architecture of a Software Defined Proximity Cloud 153
In Figure 3.10b, we plot the 3D localization delay as a function of
the number of worker nodes at the edge. The left extreme on x-axis
corresponds to a case where all 10 worker nodes are in the data
center, while the right extreme means all 10 worker nodes at the edge.
The figure demonstrates the degraded performance of indoor local-
ization computation (in terms of delay) as edge nodes start to dis-
appear. In this particular app, the increase of 3D localization delay
with fewer edge nodes is substantial. The reason for such sensitivity
is that the 3D localization computation involves multiple rounds of
interactions between the controller and worker nodes to solve smaller
subproblems