PC-MAC: A Prescheduling and Collision-Avoided MAC Protocol for Underwater Acoustic Sensor Networks

Table 1

Data packet length in different modems.

Modem type	Data rate	Preamble duration time	Packet duration time
Benthos ATM-855	800 bps	1.5 s	5.5 s
Aqua-sent	3.045 kbps	0.49 s	1.53 s
WHOI micromodem	300–5000 bps	0.87 s	1.5 s–11.54 s