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The propagation delay is one of important characteristics of underwater acoustic networks. The article analyzes two instances offered by applying MACAW protocol and ALOHA protocol to the underwater acoustic network separately, and then tables a proposal to counteract the bad influence of the propagation delay by decreasing the number of non-in-effect packets. Based on the proposal, it puts forward...
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,...
A re-usable software architecture suitable for underwater acoustic networking research has been designed and an initial version developed and demonstrated. The core of the software is a modular data link-layer that includes medium access control (MAC) and methods for discovery, plus an interface to hardware-specific device drivers that connect to specific acoustic modems. The goal is to provide this...
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