Wakeup Scheme for Ocean Monitoring Underwater Sensor Networks (UWSN)

The growing interests in underwater wireless sensor networks for a wide variety of purposes from Tsunami monitoring to commercial oilfield exploration projects have been encouraging. The use of underwater wireless nodes implies nodes are battery-powered and energy conservation in such networks becomes a leading issue. Unlike land systems that can make generous assumptions about accurate time-synchronization and that of a dense deployment scenario, the underwater context is much more constrained. Energy conservation techniques for underwater systems remain in its infancy. Wakeup schemes for sensor nodes originally designed for land systems quickly become ineffective in the harsh underwater world. We propose a sensor wakeup scheme based on Combinatorics block design that is suitable for underwater applications. We support our claims with analytical findings and simulations.