Abstract
This paper presents a low-cost and low-power
consumption asynchronous Wake-Up (WU) development to
Underwater Wireless Sensor Networks (UWSN).
An asynchronous WU offers important advantages for energyaware
network polices, however it needs some specific hardware,
an optimal configuration of system facilities and the
interconnection with a core control unit.
This proposed WU implementation has been specifically
designed to be used in acoustic underwater modems, able to react
to external acoustic stimuli. Both the modem and the Wake-Up
system use a unique piezoelectric transducer dissipating, to our
knowledge, the lowest power published until now. Moreover, the
system is able to detect both simple tones and predefined bit
patterns, being able to wake up a network node UWSN
individually or even to different nodes at the same time.
