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Underwater acoustic sensor network technology can be applied in underwater environment such as the sea or rivers. It can be mainly used for data acquisition, underwater exploration, prevention of natural disasters, unattended environmental monitoring systems, and military for underwater surveillance. Despite of this promising outlook, underwater sensor network has so many limitations in communicating,...
Underwater acoustic communication, compared with Wireless Sensor Networks (WSNs) used in terrestrial environment, poses unique challenges due to the harsh underwater environment, such as limited bandwidth capacity, high and variable propagation delays, high bit error rates, and temporary losses connectivity caused by multipath and fading phenomena in spite of using a variety of applications in many...
Recently, development of original technologies of underwater sensor network for data transmission in underwater environment has been progressed. Since propagation delay is a problem awaiting solution in acoustic communication, the transmission time tends to be increased as network radius increases. Besides, there are difficulties of MAC service, which supports to avoid the collision and maintain reliable...
The necessity to secure the communication between wireless sensor networks nodes becomes important with the system nodes are being deployed for a wide variety of applications. In this paper, we propose a new approach for session key management among group sensor nodes. We use initial trust node to build a small set of shared keys, low-cost protocols enable neighboring sensors to authenticate and establish...
The attempts to develop a ubiquitous health care monitoring system arisen from the need of automatic real-time medical services for emergent diseases. Besides, the physiological statuses gathered and maintained by this system are very helpful for diagnosis and early warning. To improve the medical services and diagnosis accuracy, a Wireless Health Advanced Mobile Bio-diagnostic System (abbreviated...
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