A dynamic power management (DPM) strategy ensures that power is consumed economically
the strategy can have a local or global scope, or both
a local DPM strategy aims to
minimize the power consumption of individual nodes
by providing each subsystem with the amount of power that is sufficient to carry out a task at hand
when there is no task to be processed, the DPM strategy forces some of the subsystems to operate at the most economical power mode or puts them into a sleeping mode
a global DPM strategy attempts to
minimize the power consumption of the overall network by defining a network-wide sleeping state