| Recent improvements in wireless communications and acoustic technology have enabled the use of sensor networks in underwater environments. Three dimensional underwater sensor networks is an emerging field which requires research in the field of channel access and routing. Applications like oceanographic data collection, pollution monitoring, offshore exploration, disaster prevention, assisted navigation, and tactical surveillance applications use underwater sensor networks. Some applications such as disaster prevention require minimum delay in data gathering. Also care must be taken to make sure that the energy expenditure of an underwater sensor node is minimal because replenishment of a sensor node is not cost-effective.; The routing algorithm proposed in this work for delay-sensitive applications uses a distributed approach. Each node in the proposed distributed rouging chooses its next hop based on the position of surface station and the propagation delay among the set of neighbor nodes. The set of neighbor nodes are chosen which are closer to surface station the node's distance to the surface station. (Abstract shortened by UMI.)... |
