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MAC protocol is one of the key technologies of the underwater acoustic networks. In order to improve the performance, this paper puts forward a modified multiple access protocol UTRAMACA. The protocol adopts parallel transmission mode and handshaking method that are different from tradition's. By this way, it improves channel utilization rate both in space and time, and it is simulated by the Matlab...
Constrained by the interior properties of underwater acoustic channels such as limited bandwidth, time-varying multipath propagation, and large propagation delay, the design of multiple access (MAC) protocols for underwater acoustic sensor networks (UWSN) poses significant challenges. Existing MAC protocols for UWSNs exhibit very low performance in channel utilization, throughput and end-to-end delay,...
The hostile seawater channel condition poses research challenges of designing reliable and efficient communication protocols for underwater acoustic sensor networks. Especially, long propagation delay of acoustic waves in water makes networks poor performance. Due to low channel utilization of traditional TDMA protocol, in this paper, we present a new medium access control (MAC) protocol called I-TDMA,...
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