State-of-the-art in MAC protocols for underwater acoustics sensor networks
EUC'07 Proceedings of the 2007 conference on Emerging direction in embedded and ubiquitous computing
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Since there are various disturbing factors such as long propagation delay and high error rate in UW-ASN, an error control mechanism is required to improve the system performance efficiently. In this paper, the carrier sensing technique, which detects whether the public media access is already occupied or not and evade the collision, is used as an error control mechanism. A method of monitoring the energy level of wireless frequency in physical layers and a method of setting-up NAV (Network Allocation Vector) using the frame transmission period were modified and re-defined for underwater environment. Through these works, a more efficient UWA-NAV technique was able to be proposed and the performance of the proposed technique was evaluated and compared with the case without UWA-NAV.