In this paper, we focus on large-scale and dense Cyber-
Physical Systems, and discuss methods that tightly integrate
communication and computing with the underlying physical
environment. We present Physical Dynamic Priority Dominance
((PD)2) protocol that exemplifies a key mechanism
to devise low time-complexity communication protocols for
large-scale networked sensor systems. We show that using
this mechanism, one can compute aggregate quantities
such as the maximum or minimum of sensor readings in a
time-complexity that is equivalent to essentially one message
exchange. We also illustrate the use of this mechanism
in a more complex task of computing the interpolation of
smooth as well as non-smooth sensor data in very low timecomplexity
