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since 08/01/2008
Overview
Underwater sensor networks will find applications in oceanographic data collection, pollution monitoring,
offshore exploration, disaster prevention, assisted navigation, tactical surveillance, and mine reconnaissance.
Moreover, Unmanned or Autonomous Underwater Vehicles (UUVs, AUVs), equipped with sensors, will find
application in exploration of natural undersea resources and gathering of scientific data in collaborative missions.
The enabling technology for underwater applications is acoustic wireless networking. Underwater Wireless
Communication Networks (UWCNs) consist of sensors and autonomous vehicles that are deployed to perform
collaborative monitoring tasks over a given volume of water. Although there exist recently developed
network protocols for wireless sensor networks, the unique characteristics of the underwater acoustic communication
channel, such as limited bandwidth capacity and high and variable propagation delays, require
further very efficient and reliable new communication protocols, in particular the recent work is mainly focused
on underwater sensor networks with only data traffic including our own research the last five years. To our
knowledge, there is no solution for multimedia (audio, video, data, still image) integrated traffic applications in
underwater sensor networks.
In this project, a cross-layer communication solution is introduced, for both data (delay-tolerant) and audio/ video (delay-sensitive) applications. The proposed solution addresses the unique challenges posed by the underwater channel. The ultimate objective of this research is to develop a reliable cross-layer solution tailored for multimedia traffic (i.e., video and audio streams, still images, and scalar sensor data) that integrates different communication functionalities to achieve high performance channel access, routing, event transport reliability, and data flow control. Furthermore, we investigate the performance of existing long delay TCP solutions, and develop a novel reliable underwater transport protocol based on our research results. Finally, to verify the validity and evaluate the performance of the proposed solutions, a new simulation testbed is developed, and a set of experiments are conducted.
In this project, a cross-layer communication solution is introduced, for both data (delay-tolerant) and audio/ video (delay-sensitive) applications. The proposed solution addresses the unique challenges posed by the underwater channel. The ultimate objective of this research is to develop a reliable cross-layer solution tailored for multimedia traffic (i.e., video and audio streams, still images, and scalar sensor data) that integrates different communication functionalities to achieve high performance channel access, routing, event transport reliability, and data flow control. Furthermore, we investigate the performance of existing long delay TCP solutions, and develop a novel reliable underwater transport protocol based on our research results. Finally, to verify the validity and evaluate the performance of the proposed solutions, a new simulation testbed is developed, and a set of experiments are conducted.